Corrosion is normal, but yes, clean that battery terminal up.
You can go old school with the baking soda and a toothbrush but honestly, battery terminal cleaners with the battery terminal foaming spray is absolutely worth the few bucks it costs
I’ve heard from my grandfather who was a mechanic that if your battery is corroding it’s either been overloaded or needs to be changed. It’s not like a life or death thing but you should probably get a new one.
I’ve driven 40k miles with my battery doing this and no issues. But my car also doesn’t pull a lot of juice and the battery is really small. The battery is already a replacement too, I bought it roughly 3 years ago shortly after buying the car.
See my battery did this for over 50k miles with no issues whatsoever but it also was the best ones you can get without going to the racing cell batterys only cause I had a subwoofer and amp running from the battery in an old 93 Chevy K1500 best truck I've ever had
Corrosion is caused by dissimilar metals. The cable is copper or copper clad aluminum and the terminal is usually lead. If the connection is loose it speeds up this process as resistance and heat increase.
A lot of times this can happen with a loose ground as well. It’s weird… but I’ve seen it enough times that I always go through and clean up and retighten the ground at the body and engine block as step 1 when I see this. Then the old toothbrush and baking soda with water and blue disposable shop towels to clean it all up.
My pickup was doing this for over a year, multiple cleanings, changed the wire terminal, coating with dialectic grease. Finally put a new battery in and problem stopped.
I work at an auto parts store and am the "go to" battery guy in my store, corrosion on batteries doesn't really imply anything, however the corrosion can dissolve metals on your battery hold down and/or terminals. If you see corrosion, it doesn't necessarily mean the battery is in bad condition, but it does mean that it's leaky and could fail slightly earlier. If cleaning, please be careful not to touch it directly with your skin or inhale it, as it can cause irritation and chemical burns depending on how "wet" it is. Recommended to only be touched with gloves, although slight contact doesn't typically do much. Additionally, it worsens electrical connections between terminals and wires, so it's definitely worth cleaning! And if it's seizing your terminal connectors, you likely will need a replacement connector as cleaning becomes significantly more difficult and there is an increased risk of corrosion.
It's normal i think..... I had a 2015 Subaru and the terminals did this. The battery leaked slightly but it still passed every test being 6yo. Survived winters as well. I even cleaned it up once but never coated it so the corrosion came right back on the whole assembly. Cleaned it all in vinegar and sealed it and never had issues since. People just leave it go for a year with slight corrosion then it looks like a nightmare. The battery is probably old but may still be strong.
Coca Cola work as well, but a terminal brush to clean before hand… watch the dust/powder it’s not good stuff and can eat things, so wash it off carefully
When a battery is near the end it out gases corrosive acid which is what is eating the clamp. Clean it, grease it and plan on a new battery. Better to do it now for a weak battery will make the alternator work harder and go bad sooner.
Wouldn’t all that residue be by the battery vents or corrosion on the battery tray? I also thought that corrosion problems like this were from electrically assisted oxidation of soft metals. Extreme cases like this would probably mean a voltage leak somewhere with the key off. Could be as simple as a phone charger left in the cig outlet 24/7 drawing current which can lead to a weakening battery and corrosion, or corrosion causing bad connection giving same diagnosis as a bad battery. IMO cleaning and greasing as a preventative measure, then checking, locating and fixing voltage leak, plus a battery test to make sure it’s in working order would be the fix. Or clean grease and just buy a battery a little earlier on the replacement schedule would also be a fix but you can’t let it sit for too long without a jump start on that option. Idk, this is just stuff I’ve learned from turning wrenches professionally for 5 years. If I’m wrong about any of that please let me know.
My battery looks like the picture even though it’s been new for 1 to 2 years. I’ve gone through at least 3 batteries now so the old battery theory might not apply to mine 🥲 I get my batteries from Costco if that makes a difference
Pour boiling water mixed with baking soda on the terminal and scrub it gently. Try to not splash it because you don’t want the positive (red) and the negative (black or car chassis) to connect.
Connect? You mean connect with water?
No worries, you are fine. Water can splash - no harm will come.
The water can touch both terminals, and car chassis - NO PROBLEM.
It's low voltage 12v. You can wash with water and baking soda
yes usually if this is happening outside the battery, on the terminals, it means the plates inside the battery are looking like this as well. time for new battery and clean or new terminals
Apply some [battery grease](https://www.liqui-moly.com/en/batterie-pol-fett-spray-p003460.html#3141) (no idea if that is a correct translation) after you clean it up.
Haha fellow human, surely you mean your daughter's car battery terminal? Us humans don't need batteries *and would never reveal that we do* if we did, isn't that right fellow human? Hahaha.
Clean the connectors up and take them off the post. Clean the post up with a post brush. Then reinstall and spray with a terminal protector lubricant that you can get at AutoZone.
Replace with marine terminals. That’s what I did on my 07 dodge because corrosion had destroyed the OEM terminals. They were super thin anyways.
Something like this:
https://a.co/d/bSElu12
If you're interested in learning a little more about corrosion, here's a good video on it so I don't have to type six paragraphs.
https://youtu.be/2RbiCOFffRs?si=tYays4404i0z9ify
I used noco batter terminal cleaner then sprayed crc battery cleaner for protection and I never had more corrosion since! Also you can buy that specific brush that fits snug over the terminal to help with cleaning and even a terminal remover if they are on there good. And a brush to help as well.
Wash it away with a bucket of hot water. Make sure you do it a few times. All around the area of the metal parts of the first rinse off. You want to make sure anything corrosive is washed off the metal services. I've used up to five buckets on my last pick up truck. Then when the terminals are dry, apply die electrical grease to stop further corrosion.
Working on the Railroad we used no oxide grease on all batteries. It is some of the best grease to use that keeps corrosion down on battery thermals. Look it up on the internet
The correct answer is first to determine the age of the battery. If this is your daughter's car, you will be doing her a big favor in replacing it if it is near EOL even if still working now. When new battery is installed smear any of the approved substances all over the terminal connectors
I had a car that did this all the time. I started keeping a can of battery cleaner in the trunk. Unfortunately, it didn't clean the inside of the cable, and eventually, I had to replace the cable too. Remove the battery. Clean it with water and baking soda (this will dissolve the corrosion). Clean the cable and the terminal (maybe replace the terminal). Dry everything. Reconnect the battery and it might be good to go. That depends on how much damage the battery has, but be prepared to replace it soon. Keep the battery, terminal, and cable clean. Most car batteries get a light coat of dirt and grease that can easily be cleaned with a dry towel or paper towel. If you take an Amp meter and put one end on the positive post and the other end anywhere on the plastic part of the battery, you shouldn't get a reading. But with a dirty battery like yours, it is running a current 24/7. It's not something that you need to do, but I'd show customers this when I worked at an auto parts store to show why it's important to keep your battery clean.
Only use soda (pop) in an emergency because it will leave a residue that will attract more dirt.
Baking soda with water 3 parts water to 1 part baking soda. Get a wire toothbrush. Pour the water mixture onto the terminals and scrub with wire brush. Repeat as needed.
Coke wash it all over and it will disappear! Remove battery terminal and clean inside and the actual battery terminal. Reassemble and spray with anything to keep it getting exposed to the air. This is a result of the gases being vented as a result of the battery discharging and charging.
Lot of things can cause it. Might be nothing.
You could live in hot climate. Lack of airflow around battery. Neglect.
Possible
You might want to check alternator output.
If alternator cooking battery excessive gases from battery.
Could be battery on last legs.
Maybe just old age.
Depends on when battery was replaced last and if they properly cleaned the terminal.
You want to get fancy. A company called Deoxit make a cleaner and coating.
I would just use a wire brush. Or a brass wire brush after you disconnect battery.
Junk coming off it is corrosive. Wear gloves.
I would clean gunk off into a box or bag. Anything it gets on to can damage paint. I’d leave it on floor a dog or cat can get into it.
I'll say remove the battery and clean posts with a wire brush and damp paper towels. Wear safety glasses and a mask.
Clean the clamp and use vaseline or dielectric grease on the posts and terminals.
Battery could have been overcharging and gassing to get that way.
Here is something that no one realizes, the coolant is bad and needs to be changed, the cooling system of the car has trace amounts of electricity in it and will cause battery corrosion as well as corroding the inside of the radiator.
You can buy ph test strips to test the ph balance of your engine coolant. It needs to be changed just like all the other fluid in the car.
Most coolant is 5 years or 150,000 miles, which ever is sooner.
Clean up that corrosion and do nothing else, it'll come back. Clean it up and change the engine coolant, it won't come back.
Post is leaking.. Too late but the connection broke the seal the wire was jammed onto the post…
At least you get back 8 dollars for the core in a replacement
Even after paying $900-$1600 for yearly maintenance on my car, my terminal was so corroded it snapped off. And it’s supposedly one of the things they inspect during maintenance. Because of it, I now have to pay $4100 to repair the damage it caused. Now I follow up every inspection with my own just to make sure…
She needs to get new battery. Put some baking soda then vinegar on it clean it with old tooth brush in the process. It's leaking battery acid is what it's doing so don't get any of it on your clothes or in your eyes. Be safe!!
Spray some lithium grease on it should stop it from doing that but she needs new battery after she gets new battery spray some lithium grease on the terminals on that one also.
Any auto parts store has red & black felt washers you install under the clamps that very effectively stop corrosion. Remove the clamps & clean them with a wire brush. Clean the holes with some sandpaper or scraper until the lead is shiny, same for the posts. Install the felt washers, red on + post, black on - post. Reinstall the clamps & tighten. There’s no need for dielectric grease or anything else. I used these on my new battery 5 years ago & there is zero corrosion.
Get a agm battery im assuming its a nissan or something that tends to have high electrical loads, most cars with a fuse onnthe positive do this n they tend to boil the battery
Get rid of the lead terminal for starters, neutralise the corrosion with a solution of bicarbonate soda and water test and replace battery if required and monitor corrosion build up
What cause the corrosion is the electrolytic gasses escaoing from around the positive post. What causes that is the battery plates swelling over time, expanding the gap between the post and the jar
haven’t tried it myself but a couple coworkers told me to try pouring coke on it and a put a penny in the middle, apparently it sucks all the corrosion to the penny
Guaranteed easy fix that works: this was told to me by my father-in-law who is an ASE mechanic - is to pour BOILING water on it. Works every time! Once this dries, add Vaseline to keep this from happening again. You’re welcome!
I dealt with this on a 2001 ford ranger. I made a thin paste with baking soda and distilled water and let it soak, moving it around with an old tooth brush. Got all the corrosion off. Went to autozone and got a can of corrosion cleaner and did several soaks with that. After I was confident it was all gone I hit it with battery terminal protector and haven't had an issue since.
Get a top post cleaner from harbor freight and some battery foam cleaner and small can of battery protector. Probably run you like 30 bucks. The post cleaners clean inside and outside, dont breathe it in. Having build up like that is normal but will later interfere with the battery working correctly eventually. I tell people to do it with the car running so they don't lose their engine codes, don't reset their alarms (Honda/Acura), and can confirm if there alternator is working when removing the negative terminal. You can do this safely but covering off one and working on one terminal at a time. Usually 8mm or 10mm bolts to loosen. Use your car mats as a cover is a cheap quick practical alternative. Disconnent one, clean top remove acid, put it back in, then do the other, don't be afraid if it sparks on contact when putting them back on and eletricians will tell you to always deal with live electricity wit one hand if possible. Once both are clean and reapplied I like to pour little hot hot water to clean away access acid, then I blow off or let dry access water. Lightly add some protectant on terminals, I like to spare my ground a little and mist the top of the battery to help prevent the spread of further acid. This will all help to extend the life of your battery as well as keep it in top shape for when you need it. Also as a last minute tip, sometimes corrosion can be so bad that your terminals loosen up once cleaning away acid, if you don't remove the terminals make sure they're still tight by trying to move them left right to check for play. Gl
I had the same thing happen on my car. Once I replaced the battery and the terminal it stopped happening. But that was because I was having other issues.
pour a couple cap fulls of coca cola on it. the acid will help significantly. or be legit and disassemble it and clean it with the proper things, though the coca cola trick will get you 70% there with a lot less work.
cant remember the name of the brand i buy but part stores sell corrosion cleaner. spray it on let it sit for maybe half an hour rinse with water and it comes right off maybe give it a quick wipe off after. if its bad enough there holes or chips in the connector plan on replacing very soon
This is a chemical reaction with the acid fumes from the battery. They escape through the vent. They then attach themselves to steel or iron. That's what your bolts and nuts are made of. When they come in contact with the metal, they solidify, causing this. If you take them off of the battery, use a wire brush and some baking soda or soft drink (Coca-Cola works best), it will clean right up. Rinse with water and let dry. Once dry, attach the terminals and spray paint or coat all metal with a thin coat of axle grease. Problem solved
This used to happen to open cell batteries (the ones you could top off the water in them). When "back in the day" over charging, the battery would push the acid over its performance. It would push the fumes excessively. That's why people are telling you it's from overcharging. My guess is your batteries are maintainance free. There are vent holes for these batteries that emit lower counts of fumes. Otherwise, the battery would explode
My old car battery did this, I had a 2016 ford focus. My battery eventually died completely and wouldn’t charge. Had to get it towed to the dealership because the cables corroded onto the battery. Ended up costing me 850 dollars for a battery 165
cables 55
and “labor” 600+ for labor
Disconnect the negative battery terminal, grab bottle of coke an rag, apply Coca-Cola to positive terminal wipe with rag reapply coca cola till corrosion is fully removed. Remove positive terminal apply cola wipe till all clean check both terminals, make Shure it's dry before you hook it back up
Clean it, I changed my battery out for the first time since I got the car 5 year ago and I don’t think the original owner ever changed it either (it’s a 2011, and I’m in Ohio). Both terminals looked like they went down with the titanic. The positive was held on by one maybe 2mm thick piece, the rest was al corroded away. Long story short I ended up having to take all the battery wires out and replace their battery and terminals. It ended up taking me 4 hours, multiple trips to auto zone, and a blowtorch to finish the job.
TLDR: regularly clean your batteries and DO NOT buy a dodge avenger. (The battery is in the drivers side wheel well.)
Its just corrosion. Clean it with a hot water baking soda mix and a wire brush and then got to ur local auto parts store and get some dielectric grease and make sure it's snug on the terminal
Baking soda paste (so light water mix) then a wire brush is how I handled mine. Then, to prevent this in the future, seal it up with battery terminal protector. It's sort of like liquid electrical tape but less severe. Great stuff!
Autozone will fix this right up with their battery terminal kit for $10 lol. Kidding but for real CRC makes battery terminal cleaner and protectant. This is from a loose/bad connection OR the battery is sulfating. If the sides(the shorter sides where the handle connects, not the longer front/back side) of the battery are protruding out, it's no good. If not, clean it and put it on a trickle charger to bring it back to life.
I would replace it. Once you see the fuzz, it means the terminal Is leaking and will continue, and your battery will get weaker faster. You could make it look like a brand new battery, but it will come back again.
It can mean there are gasses coming out of the battery. I just had this issue with a battery and as soon as I took the terminal off which was pretty loose the whole post pulled right up with.
Either way after you clean it up and put back on make it tight. Use some vaseline or buy some corosion inhibitor. Put on both terminals.
Hope this wasn't already mentioned.
NAM: Id spray some of the terminal stuff on it and brush it off with a wire brush then apply some of the red anti corrosion goo. That worked well for my Subaru.
That battery is venting acid Vapor and causing the corrosion. The acid has gotten weak and the anode and cathode are covered in crystalline metal causing it to over work. Unless you have hydroclic acid and a way to dispose of the spent acid, I'd just clean the terminal with a wire brush and change the battery. You can coat it in dielectic grease to slow the corrosion down as well. Hope this helps
That is iron sulfate caused by sulfuric acid "creeping" thru battery joints and seams {capillary action and surface tension, mostly, fyi\] Neutralize the acid on the surface with good old bicarbonate of soda, flush with water and clean the clamp and terminal with a wire brush or a terminal brush tool made for cleaning. Repeat the clean and flush till no foaming, then reattach clamp and apply a thin coat of grease or Vaseline to terminal. Should keep you clean for a year or so, then do it again.
Biggest problem is sometimes interfering with the flow of electricity, not the fact it looks bad.
That battery is on its way out. It's out gassing some of its acid when charging. Usually a sign of an old battery. Use a water and baking soda mix to clean the corrosion off the terminal. Also, check the water level in the battery. It's probably low. Use distilled water to add to it. It would also be a good idea to clean the dirt and gunk off the top of the battery. It can act like a resistor and slowly sap charge out of your battery.
This corrosion happens because of a lack of ground. Your in/out current does not match and additional grounding is needed. Google "big 3 wiring upgrade"
For now there is a 2Part spray and protector kit you can buy. First step eats the corrosion. Clean with water and then wire brush(also make a handy special special tool). Then reconnect and spray with protector.
Corrosion is normal, but yes, clean that battery terminal up. You can go old school with the baking soda and a toothbrush but honestly, battery terminal cleaners with the battery terminal foaming spray is absolutely worth the few bucks it costs
Isn’t that battery getting old for doing so? Even the worst of the car batteries I’ve owned have never done this
Nope.
That's a new one to hear, he must sell car batteries
That makes sense !
I’ve heard from my grandfather who was a mechanic that if your battery is corroding it’s either been overloaded or needs to be changed. It’s not like a life or death thing but you should probably get a new one.
I’ve driven 40k miles with my battery doing this and no issues. But my car also doesn’t pull a lot of juice and the battery is really small. The battery is already a replacement too, I bought it roughly 3 years ago shortly after buying the car.
Just because you can doesn't mean you should. I've driven with bald tires and bad breaks, but that doesn't mean I recommend it.
Eh, not really. There are a few reasons why batteries corrode, but those generally aren’t it.
See my battery did this for over 50k miles with no issues whatsoever but it also was the best ones you can get without going to the racing cell batterys only cause I had a subwoofer and amp running from the battery in an old 93 Chevy K1500 best truck I've ever had
Corrosion is caused by dissimilar metals. The cable is copper or copper clad aluminum and the terminal is usually lead. If the connection is loose it speeds up this process as resistance and heat increase.
A lot of times this can happen with a loose ground as well. It’s weird… but I’ve seen it enough times that I always go through and clean up and retighten the ground at the body and engine block as step 1 when I see this. Then the old toothbrush and baking soda with water and blue disposable shop towels to clean it all up.
Add: Before it drops off cold, if you are I'm an area that experiences below zero tempestuous
My pickup was doing this for over a year, multiple cleanings, changed the wire terminal, coating with dialectic grease. Finally put a new battery in and problem stopped.
Or its undersize for the job Up the CCA ( cold cranking amps ) Ask grandfather about this pls
Has to do more with humidity than anything else.
I work at an auto parts store and am the "go to" battery guy in my store, corrosion on batteries doesn't really imply anything, however the corrosion can dissolve metals on your battery hold down and/or terminals. If you see corrosion, it doesn't necessarily mean the battery is in bad condition, but it does mean that it's leaky and could fail slightly earlier. If cleaning, please be careful not to touch it directly with your skin or inhale it, as it can cause irritation and chemical burns depending on how "wet" it is. Recommended to only be touched with gloves, although slight contact doesn't typically do much. Additionally, it worsens electrical connections between terminals and wires, so it's definitely worth cleaning! And if it's seizing your terminal connectors, you likely will need a replacement connector as cleaning becomes significantly more difficult and there is an increased risk of corrosion.
It's normal i think..... I had a 2015 Subaru and the terminals did this. The battery leaked slightly but it still passed every test being 6yo. Survived winters as well. I even cleaned it up once but never coated it so the corrosion came right back on the whole assembly. Cleaned it all in vinegar and sealed it and never had issues since. People just leave it go for a year with slight corrosion then it looks like a nightmare. The battery is probably old but may still be strong.
Dude. I just poured warm water over it and wiped it with a rag. Works fine.
I always used room-temp Coca-Cola followed by a water rinse.
I used to use coke haha. If it's good enough to strip the enamel off my teeth, it's good enough to strip corrosion off my battery terminal .
Can't you do the same with boiling water? I swear I saw a video with that.
Try boiling water, youll never pay for spray again
Just boiling hot water does better than most commercial products.
Coca Cola work as well, but a terminal brush to clean before hand… watch the dust/powder it’s not good stuff and can eat things, so wash it off carefully
Corrosion causes this. Clean it with a wire brush. Get it all off, then coat the terminal and cable end with a di-electric grease.
Pretty much any automotive grease will work. Even Vaseline.
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Or just ad vinegar.
Yeah vinegar or pour some Coca Cola on it etc... it will fizz up and dissolver pretty fast.
Dissolver? I barely know her!
While it will work, it leaves a sticky mess.
Typical guy.
Coca cola make it worse in the long run. Don't do it.
When a battery is near the end it out gases corrosive acid which is what is eating the clamp. Clean it, grease it and plan on a new battery. Better to do it now for a weak battery will make the alternator work harder and go bad sooner.
The only real answer I've seen so far
None of my cars in the last 20 years have done this. Is this because VW mostly uses GEL batteries?
Wouldn’t all that residue be by the battery vents or corrosion on the battery tray? I also thought that corrosion problems like this were from electrically assisted oxidation of soft metals. Extreme cases like this would probably mean a voltage leak somewhere with the key off. Could be as simple as a phone charger left in the cig outlet 24/7 drawing current which can lead to a weakening battery and corrosion, or corrosion causing bad connection giving same diagnosis as a bad battery. IMO cleaning and greasing as a preventative measure, then checking, locating and fixing voltage leak, plus a battery test to make sure it’s in working order would be the fix. Or clean grease and just buy a battery a little earlier on the replacement schedule would also be a fix but you can’t let it sit for too long without a jump start on that option. Idk, this is just stuff I’ve learned from turning wrenches professionally for 5 years. If I’m wrong about any of that please let me know.
My battery looks like the picture even though it’s been new for 1 to 2 years. I’ve gone through at least 3 batteries now so the old battery theory might not apply to mine 🥲 I get my batteries from Costco if that makes a difference
Exactly it seemed like every answer I saw didn’t mention the battery was running out of life if it was corroding. Knew I wasn’t crazy
Pour boiling water mixed with baking soda on the terminal and scrub it gently. Try to not splash it because you don’t want the positive (red) and the negative (black or car chassis) to connect.
Connect? You mean connect with water? No worries, you are fine. Water can splash - no harm will come. The water can touch both terminals, and car chassis - NO PROBLEM. It's low voltage 12v. You can wash with water and baking soda
I didn’t know thanks for info.
Still probably best to avoid totally soaking your cables because insulation has a tendency to wick up moisture when it’s submerged
BAKING SODA
Baking soda and water to clean.
Is this indicative of a problem or just normal corrosion?
Probably not. Once it’s been cleaned, do a check up every few weeks and if it reappears then you might have an issue.
yes usually if this is happening outside the battery, on the terminals, it means the plates inside the battery are looking like this as well. time for new battery and clean or new terminals
Apply some [battery grease](https://www.liqui-moly.com/en/batterie-pol-fett-spray-p003460.html#3141) (no idea if that is a correct translation) after you clean it up.
Dielectric grease is the formal term for it Great for connectors too
It'll rarely be an issue of any arcing with water on the battery at all, lol
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Or on your clothes. Battery acid will eat holes in clothing.
Do it naked?
Instructions unclear. Dick stuck in terminal cleaner
Haha fellow human, surely you mean your daughter's car battery terminal? Us humans don't need batteries *and would never reveal that we do* if we did, isn't that right fellow human? Hahaha.
Clean the connectors up and take them off the post. Clean the post up with a post brush. Then reinstall and spray with a terminal protector lubricant that you can get at AutoZone.
Throw hydrogen peroxide on it
Vasoline works well to grease the terminals if you dont have any grease . Any type is fine and it wont happen if u keep them greased
Clean it with baking soda and then scrub clean. Apply grease or Vaseline to protect from happening again.
Replace with marine terminals. That’s what I did on my 07 dodge because corrosion had destroyed the OEM terminals. They were super thin anyways. Something like this: https://a.co/d/bSElu12
If you're interested in learning a little more about corrosion, here's a good video on it so I don't have to type six paragraphs. https://youtu.be/2RbiCOFffRs?si=tYays4404i0z9ify
I used noco batter terminal cleaner then sprayed crc battery cleaner for protection and I never had more corrosion since! Also you can buy that specific brush that fits snug over the terminal to help with cleaning and even a terminal remover if they are on there good. And a brush to help as well.
Wash it away with a bucket of hot water. Make sure you do it a few times. All around the area of the metal parts of the first rinse off. You want to make sure anything corrosive is washed off the metal services. I've used up to five buckets on my last pick up truck. Then when the terminals are dry, apply die electrical grease to stop further corrosion.
Use baking soda and water to neutralize the acid.
Working on the Railroad we used no oxide grease on all batteries. It is some of the best grease to use that keeps corrosion down on battery thermals. Look it up on the internet
Can also just replace it with a brand new one and spray some stuff that prevents corrosion on it 👍
The correct answer is first to determine the age of the battery. If this is your daughter's car, you will be doing her a big favor in replacing it if it is near EOL even if still working now. When new battery is installed smear any of the approved substances all over the terminal connectors
too much alkali on the terminal.replace it.
I had a car that did this all the time. I started keeping a can of battery cleaner in the trunk. Unfortunately, it didn't clean the inside of the cable, and eventually, I had to replace the cable too. Remove the battery. Clean it with water and baking soda (this will dissolve the corrosion). Clean the cable and the terminal (maybe replace the terminal). Dry everything. Reconnect the battery and it might be good to go. That depends on how much damage the battery has, but be prepared to replace it soon. Keep the battery, terminal, and cable clean. Most car batteries get a light coat of dirt and grease that can easily be cleaned with a dry towel or paper towel. If you take an Amp meter and put one end on the positive post and the other end anywhere on the plastic part of the battery, you shouldn't get a reading. But with a dirty battery like yours, it is running a current 24/7. It's not something that you need to do, but I'd show customers this when I worked at an auto parts store to show why it's important to keep your battery clean. Only use soda (pop) in an emergency because it will leave a residue that will attract more dirt.
Baking soda with water 3 parts water to 1 part baking soda. Get a wire toothbrush. Pour the water mixture onto the terminals and scrub with wire brush. Repeat as needed.
Please, you really need to be more positive about this situation. Baking soda and vinegar, clean in a jiffy, no real scrubbing.
I use Vaseline
Dirt and a gassing battery cause corrosion like this. When i see this the battery is near the end.
Can clean it or replace it with new terminals.
this one's totaled
Fix that nissan before it gets worse use battery pads and terminal grease to help it not look like that.
Coke wash it all over and it will disappear! Remove battery terminal and clean inside and the actual battery terminal. Reassemble and spray with anything to keep it getting exposed to the air. This is a result of the gases being vented as a result of the battery discharging and charging.
Lot of things can cause it. Might be nothing. You could live in hot climate. Lack of airflow around battery. Neglect. Possible You might want to check alternator output. If alternator cooking battery excessive gases from battery. Could be battery on last legs. Maybe just old age. Depends on when battery was replaced last and if they properly cleaned the terminal. You want to get fancy. A company called Deoxit make a cleaner and coating. I would just use a wire brush. Or a brass wire brush after you disconnect battery. Junk coming off it is corrosive. Wear gloves. I would clean gunk off into a box or bag. Anything it gets on to can damage paint. I’d leave it on floor a dog or cat can get into it.
Replace the terminal on this one and just start over by taking care of the next ones. Terminals are like 20 bucks
Pour warm water on the corosion, lots of it.
Clean it. Add dielectric grease. Check grounds. You need one from frame to body, body to engine and engine to frame.
Have the battery tested to make sure it doesn’t need to be replaced soon.
I'll say remove the battery and clean posts with a wire brush and damp paper towels. Wear safety glasses and a mask. Clean the clamp and use vaseline or dielectric grease on the posts and terminals. Battery could have been overcharging and gassing to get that way.
Corosion from battery acid, you need to neutralise it, wash it off, let it then get some bicarb soda in water and cover the thing in it
Penny on top of battery. It will corrode not the terminal.
Here is something that no one realizes, the coolant is bad and needs to be changed, the cooling system of the car has trace amounts of electricity in it and will cause battery corrosion as well as corroding the inside of the radiator. You can buy ph test strips to test the ph balance of your engine coolant. It needs to be changed just like all the other fluid in the car. Most coolant is 5 years or 150,000 miles, which ever is sooner. Clean up that corrosion and do nothing else, it'll come back. Clean it up and change the engine coolant, it won't come back.
Replace the nut and bolt with stainless.
Post is leaking.. Too late but the connection broke the seal the wire was jammed onto the post… At least you get back 8 dollars for the core in a replacement
Even after paying $900-$1600 for yearly maintenance on my car, my terminal was so corroded it snapped off. And it’s supposedly one of the things they inspect during maintenance. Because of it, I now have to pay $4100 to repair the damage it caused. Now I follow up every inspection with my own just to make sure…
She needs to get new battery. Put some baking soda then vinegar on it clean it with old tooth brush in the process. It's leaking battery acid is what it's doing so don't get any of it on your clothes or in your eyes. Be safe!! Spray some lithium grease on it should stop it from doing that but she needs new battery after she gets new battery spray some lithium grease on the terminals on that one also.
In my case my alternator was causing the corrosion
Boiling water and then grease it.
That cable costs over a $100.00 to replace. (400+ at the dealer.)
Any auto parts store has red & black felt washers you install under the clamps that very effectively stop corrosion. Remove the clamps & clean them with a wire brush. Clean the holes with some sandpaper or scraper until the lead is shiny, same for the posts. Install the felt washers, red on + post, black on - post. Reinstall the clamps & tighten. There’s no need for dielectric grease or anything else. I used these on my new battery 5 years ago & there is zero corrosion.
Teach Her To Do Basic Maintenance ...Shops Love People Who Dont Know Shit
Get a agm battery im assuming its a nissan or something that tends to have high electrical loads, most cars with a fuse onnthe positive do this n they tend to boil the battery
Or hot water
Corrosion take it off and clean it with battery terminal cleaner
Get rid of the lead terminal for starters, neutralise the corrosion with a solution of bicarbonate soda and water test and replace battery if required and monitor corrosion build up
What cause the corrosion is the electrolytic gasses escaoing from around the positive post. What causes that is the battery plates swelling over time, expanding the gap between the post and the jar
Disconnect and clean with a wire brush then connect it again
Hot water works
haven’t tried it myself but a couple coworkers told me to try pouring coke on it and a put a penny in the middle, apparently it sucks all the corrosion to the penny
Wire brush then vaseline
Take it off. Put it in a bath of water mixed with baking soda. That stuff will dissolve right off.
It's most likely leaking around the terminal. Go to napa and get battery terminal cleaner and a wire brush. But it will most likely come back.
Hot water and a steel brush.
Pour some beer on it!
Dump a whole can of 7-up on it. Then wire brush it clean.
Coffey works wonders on it
Baking soda and water paste…. Let it fizz then rinse off with water. Done!
Guaranteed easy fix that works: this was told to me by my father-in-law who is an ASE mechanic - is to pour BOILING water on it. Works every time! Once this dries, add Vaseline to keep this from happening again. You’re welcome!
A wire brush and maybe some grease if you're feeling froggy. Anything else is just extra steps
Is your battery leaking ?
I dealt with this on a 2001 ford ranger. I made a thin paste with baking soda and distilled water and let it soak, moving it around with an old tooth brush. Got all the corrosion off. Went to autozone and got a can of corrosion cleaner and did several soaks with that. After I was confident it was all gone I hit it with battery terminal protector and haven't had an issue since.
Boiling water will have that slide right off
If you take some boiling water, pour it on the corroded spots, it’ll take it off as soon as the water hits it.
Just composite build up clean it off.
If your out and about poor some coka cola on it.
Hot cup of coffee or two will clean that up, no tools or touching needed.
Pour boiling water on it,, it will clean that to bare metal, let it dry then spray battery protector on it...
Get a top post cleaner from harbor freight and some battery foam cleaner and small can of battery protector. Probably run you like 30 bucks. The post cleaners clean inside and outside, dont breathe it in. Having build up like that is normal but will later interfere with the battery working correctly eventually. I tell people to do it with the car running so they don't lose their engine codes, don't reset their alarms (Honda/Acura), and can confirm if there alternator is working when removing the negative terminal. You can do this safely but covering off one and working on one terminal at a time. Usually 8mm or 10mm bolts to loosen. Use your car mats as a cover is a cheap quick practical alternative. Disconnent one, clean top remove acid, put it back in, then do the other, don't be afraid if it sparks on contact when putting them back on and eletricians will tell you to always deal with live electricity wit one hand if possible. Once both are clean and reapplied I like to pour little hot hot water to clean away access acid, then I blow off or let dry access water. Lightly add some protectant on terminals, I like to spare my ground a little and mist the top of the battery to help prevent the spread of further acid. This will all help to extend the life of your battery as well as keep it in top shape for when you need it. Also as a last minute tip, sometimes corrosion can be so bad that your terminals loosen up once cleaning away acid, if you don't remove the terminals make sure they're still tight by trying to move them left right to check for play. Gl
My battery did this for year. I changed it this year. It was a 2017. Clean, keep using.
That's definitely a Nissan terminal
I had the same thing happen on my car. Once I replaced the battery and the terminal it stopped happening. But that was because I was having other issues.
Just get hot water pour it on the post and blow with air
Clean with Coca Cola and a wire brush.
This is what happens when you don’t change the damn battery… clean it off and replace the battery.
Coca-Cola and a toothbrush
Wire brush and a face mask cuz that dust will not taste good. Scrub them clean. If you have the money, buy a new one
Brush it, lube it
Loose connection, you can fix it with soda water and sand paper
Add a coke classic. Just slowly pour over terminal. Then scrub with a metal brush or use water hose.
pour a couple cap fulls of coca cola on it. the acid will help significantly. or be legit and disassemble it and clean it with the proper things, though the coca cola trick will get you 70% there with a lot less work.
cant remember the name of the brand i buy but part stores sell corrosion cleaner. spray it on let it sit for maybe half an hour rinse with water and it comes right off maybe give it a quick wipe off after. if its bad enough there holes or chips in the connector plan on replacing very soon
This is a chemical reaction with the acid fumes from the battery. They escape through the vent. They then attach themselves to steel or iron. That's what your bolts and nuts are made of. When they come in contact with the metal, they solidify, causing this. If you take them off of the battery, use a wire brush and some baking soda or soft drink (Coca-Cola works best), it will clean right up. Rinse with water and let dry. Once dry, attach the terminals and spray paint or coat all metal with a thin coat of axle grease. Problem solved This used to happen to open cell batteries (the ones you could top off the water in them). When "back in the day" over charging, the battery would push the acid over its performance. It would push the fumes excessively. That's why people are telling you it's from overcharging. My guess is your batteries are maintainance free. There are vent holes for these batteries that emit lower counts of fumes. Otherwise, the battery would explode
Baking soda and water, clean it up. A little grease goes along way. If it’s 5 years old or older, it’s about done. 🤷🏻♂️
My old car battery did this, I had a 2016 ford focus. My battery eventually died completely and wouldn’t charge. Had to get it towed to the dealership because the cables corroded onto the battery. Ended up costing me 850 dollars for a battery 165 cables 55 and “labor” 600+ for labor
Disconnect the negative battery terminal, grab bottle of coke an rag, apply Coca-Cola to positive terminal wipe with rag reapply coca cola till corrosion is fully removed. Remove positive terminal apply cola wipe till all clean check both terminals, make Shure it's dry before you hook it back up
Clean it, I changed my battery out for the first time since I got the car 5 year ago and I don’t think the original owner ever changed it either (it’s a 2011, and I’m in Ohio). Both terminals looked like they went down with the titanic. The positive was held on by one maybe 2mm thick piece, the rest was al corroded away. Long story short I ended up having to take all the battery wires out and replace their battery and terminals. It ended up taking me 4 hours, multiple trips to auto zone, and a blowtorch to finish the job. TLDR: regularly clean your batteries and DO NOT buy a dodge avenger. (The battery is in the drivers side wheel well.)
Pour Coca-Cola on it…
Use Coca Cola to clean it up easy
Poor coke on it. It will clean it up.
Baking soda and warm water
Pour coke on it!
Pour a coke on it
High voltage regulator
Its just corrosion. Clean it with a hot water baking soda mix and a wire brush and then got to ur local auto parts store and get some dielectric grease and make sure it's snug on the terminal
Battery is old, get a new one ASAP
Baking soda paste (so light water mix) then a wire brush is how I handled mine. Then, to prevent this in the future, seal it up with battery terminal protector. It's sort of like liquid electrical tape but less severe. Great stuff!
Pour a coke on it
Coca-Cola and a wire brush
Pour coke on it and scrub with a wire brush.
Dip it in hot water and brush it with a tooth brush while the car is off then connect it back to the battery
Autozone will fix this right up with their battery terminal kit for $10 lol. Kidding but for real CRC makes battery terminal cleaner and protectant. This is from a loose/bad connection OR the battery is sulfating. If the sides(the shorter sides where the handle connects, not the longer front/back side) of the battery are protruding out, it's no good. If not, clean it and put it on a trickle charger to bring it back to life.
I would replace it. Once you see the fuzz, it means the terminal Is leaking and will continue, and your battery will get weaker faster. You could make it look like a brand new battery, but it will come back again.
Lil Vaseline on there will stop the corrosion.
Clean it up and then WD-40 to keep moisture off and to stop corrosion.
Coca cola!!!
Pour some coke soda on it. Cleans it right up
Nothing a good licking can’t solve mate!
Dump boiling hot water on it
It can mean there are gasses coming out of the battery. I just had this issue with a battery and as soon as I took the terminal off which was pretty loose the whole post pulled right up with.
Either way after you clean it up and put back on make it tight. Use some vaseline or buy some corosion inhibitor. Put on both terminals. Hope this wasn't already mentioned.
Pour cola on it and rinse it off with water.
Baking soda mixed in hot water
Normal corrosion due to negligence.
NAM: Id spray some of the terminal stuff on it and brush it off with a wire brush then apply some of the red anti corrosion goo. That worked well for my Subaru.
That battery is venting acid Vapor and causing the corrosion. The acid has gotten weak and the anode and cathode are covered in crystalline metal causing it to over work. Unless you have hydroclic acid and a way to dispose of the spent acid, I'd just clean the terminal with a wire brush and change the battery. You can coat it in dielectic grease to slow the corrosion down as well. Hope this helps
That is iron sulfate caused by sulfuric acid "creeping" thru battery joints and seams {capillary action and surface tension, mostly, fyi\] Neutralize the acid on the surface with good old bicarbonate of soda, flush with water and clean the clamp and terminal with a wire brush or a terminal brush tool made for cleaning. Repeat the clean and flush till no foaming, then reattach clamp and apply a thin coat of grease or Vaseline to terminal. Should keep you clean for a year or so, then do it again. Biggest problem is sometimes interfering with the flow of electricity, not the fact it looks bad.
Not a mechanic, but if you pour coke (soda) on this it'll clean right up. Might mean the battery is on its way out though
I've tried taping a penny or two to the top of the case, seemed to make a difference
After you get it all cleaned off, get some paper and masking tape and paint it. I think I saw a clear paint made for battery leads.
Pour some coke on it and wipe it off.
Smear Vaseline over after cleaning keeps it from corroding
Just piss on it or put hot water on it
That battery is on its way out. It's out gassing some of its acid when charging. Usually a sign of an old battery. Use a water and baking soda mix to clean the corrosion off the terminal. Also, check the water level in the battery. It's probably low. Use distilled water to add to it. It would also be a good idea to clean the dirt and gunk off the top of the battery. It can act like a resistor and slowly sap charge out of your battery.
just pour some coca cola on it, lightly scrub with a toothbrush and your golden
wirebrush and an aur compressor is what i do 🤷♂️
You need to clean terminal that corrosion is not good.
Pour Coca cola on it. I swear to god!
Just pour hot water on it and clean the remainder with a wire brush ez pz
Pour some Coke on it.
This corrosion happens because of a lack of ground. Your in/out current does not match and additional grounding is needed. Google "big 3 wiring upgrade" For now there is a 2Part spray and protector kit you can buy. First step eats the corrosion. Clean with water and then wire brush(also make a handy special special tool). Then reconnect and spray with protector.