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The Simple Way to Clean Car Battery Corrosion

The problem of car battery corrosion arises when your car sits in the garage idly for months. Corrosion can form in and on the battery’s terminals and around the battery cable ends, and the formation rate becomes faster when the engine and battery are not running. You can extend the battery’s lifespan and improve its performance if you regularly check and clean car battery corrosion.

What is Car Battery Corrosion?

Corrosion looks like a crusty, ashy substance that forms around the battery ports. It is created because of the chemical reaction that goes in the terminals and battery cable ends. Corroded ends won’t be able to supply power to the tools they have been connected.

how to clean car battery corrosion

In fact, corrosion forms for two primary reasons:

  • Two different types of metal have been used in making the battery’s terminal and cable ends
  • The battery discharges hydrogen at the time of charging

How to Clean Car Battery Corrosion

You can remove corrosion from car battery by using both household items and professional-grade supplies. Here, we’ll show you how to do it with household items:

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Materials

  • Baking soda
  • Petroleum jelly
  • Wire brush
  • Water

clean corrosion off car battery

Directions

  1. The first step to clean corrosion off car battery is to remove the battery terminals. Use eyes protection and gloves so that you’re safe from the accidental spatter of battery acid. Now, remove the cable ends with a battery terminal wrench.
  2. Sprinkle baking soda on the battery terminals in a way so that they are completely covered with the powder.
  3. Pour a little amount of water on the soda, and let the latter bubbling up for a couple of seconds. The chemical reaction won’t last more than a minute. It will neutralize the acidic substance in the corrosion and make it safe to handle.
  4. Repeat step 1 and 2 on the cable ends.
  5. Use a wire brush to scrub off the corrosion immediately after the chemical reaction stops. Focus particularly on the areas around the battery terminals; both the inside and outside of the cable ends. If you can’t manage a wire brush, an old toothbrush will do.
  6. After scrubbing off the corrosion, rinse the areas with clean water. You have to wash the terminals and cable ends thoroughly so that there’s no trace of rusty substance is seen there.
  7. Wipe the areas with a clean piece of cloth or towel and let it air-dry completely. Use a blow dryer if you want to dry them quickly.
  8. The last step is to dab a layer of petroleum jelly on the terminals. The jelly will protect the terminals from forming corrosion and help in the transmission of electricity between them and the cable ends.

You can also use a commercial battery cleaner spray, protective spray, and terminal brush to clean car battery corrosion.

20 thoughts on “The Simple Way to Clean Car Battery Corrosion

  • February 11, 2017 at 1:52 am
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    That was useful infomation,iliked it very much,thank you CAR FROM JAPAN!

    Reply
  • February 14, 2017 at 2:59 pm
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    Food for thought for my machine

    Reply
  • February 14, 2017 at 6:31 pm
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    Hi, thanks for all the tips you post they really help. My car battery drains on its on even if you remove the terminals after parking it still drains. Any idea on how to over come this issue?

    Reply
    • February 16, 2017 at 2:04 pm
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      Thank you for contacting Car From Japan. However, we cannot answer your problem because there is many things we need to see at your car. I suggest you to bring the car to a local mechanical shop o solve your problem.

      Reply
  • February 15, 2017 at 11:16 am
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    Liked the information on cleaning of corrosion on battery. Wonderful

    Reply
  • February 15, 2017 at 1:14 pm
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    must have information for every owner and prospective car owner

    Reply
    • February 16, 2017 at 1:57 pm
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      We are happy to receive your comments. Please share with your friends so they can enjoy this article, too.

      Reply
  • February 15, 2017 at 2:17 pm
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    Your informative tips are really of great help to motorists.

    Reply
    • February 16, 2017 at 1:57 pm
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      We are glad that you like the article. Don’t forget to share with your friends!

      Reply
  • February 15, 2017 at 3:01 pm
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    Can I change engine oil by myself, and to do it?

    Reply
    • February 28, 2017 at 5:09 pm
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      U should bring your car to a mechanic if u are not confident about DIY

      Reply
  • February 15, 2017 at 3:47 pm
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    Thanx da knowledge

    Reply
    • February 16, 2017 at 1:44 pm
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      Thank you. We will provide more useful information like this. Stay tuned

      Reply
  • February 15, 2017 at 4:12 pm
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    That very good information

    Reply
    • February 16, 2017 at 1:44 pm
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      Thank you. We will provide more useful information like this. Stay tuned

      Reply
  • February 16, 2017 at 4:05 pm
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    Perfect… learned a new thing on corrosion management

    Reply
    • February 28, 2017 at 5:07 pm
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      We are happy to receive your comments. Please share with your friends so they can enjoy this article, too.

      Reply
  • February 16, 2017 at 6:46 pm
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    To avoid that you have clean and after aply grease can also be ok

    Reply
    • February 28, 2017 at 1:20 pm
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      Thank u for your comment

      Reply
  • February 17, 2017 at 1:50 am
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    Thank you for the information . is it a good way to clean battery corrosion with hot water?

    Reply

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