How to Clean Battery Corrosion


Dealing with battery corrosion is an inevitable part of owning any device or vehicle that operates on batteries. Not only does it affect the performance, but it can also lead to significant damage if left unattended. This article aims to provide a comprehensive guide on how to clean battery corrosion efficiently and effectively, ensuring your devices remain in top-notch condition.

Understanding Battery Corrosion

What is Battery Corrosion?

Battery corrosion refers to the white, greenish, or bluish substance that forms on the metal parts of a battery, typically the terminals. It is a result of the chemical reaction between the battery acid and the metal, leading to the formation of salts.

Causes of Battery Corrosion

Several factors contribute to battery corrosion, including overcharging, exposure to moisture, leakage of battery acid, and the natural aging process of the batteries.

Preparation for Cleaning

Safety Measures

Before diving into the cleaning process, it’s crucial to take necessary safety measures. Wear protective gloves and eyewear to protect against harmful chemicals.

Tools and Materials Needed

  • Baking soda
  • Water
  • An old toothbrush or small brush
  • Clean cloth
  • Protective gloves and eyewear

Step-by-Step How to Clean Battery Corrosion

Initial Assessment

Start by inspecting the battery and the extent of the corrosion. This will help determine the best cleaning method.

Disconnecting the Battery

For safety, ensure the device or vehicle is off and carefully disconnect the battery, starting with the negative terminal.

Cleaning the Corrosion

  • Home Remedies: A mixture of baking soda and water is an effective home remedy. Apply the paste to the corroded areas and scrub gently with a brush.
  • Commercial Cleaners: If the corrosion is severe, commercial battery cleaners can be used for a more thorough clean.

Neutralizing the Acid

After scrubbing, neutralize the battery acid by applying a baking soda solution, then wipe the area clean.

Drying and Reconnecting

Ensure the battery and the terminals are completely dry before reconnecting, starting with the positive terminal.

Preventive Measures

To prevent future corrosion, regularly check and clean the battery terminals and ensure the battery is charged correctly. Using petroleum jelly on the terminals can also help prevent corrosion.


Cleaning battery corrosion is a simple yet essential maintenance task that extends the life of your devices and vehicles. With the right tools and techniques, you can easily manage corrosion and ensure optimal performance.


What causes battery corrosion?

  • Battery corrosion is caused by the chemical reaction between the battery acid and the metal terminals, leading to the formation of corrosive salts.

Can battery corrosion damage the device?

  • Yes, if left unattended, battery corrosion can lead to poor electrical connections and damage the device.

How often should I clean battery terminals?

  • It’s recommended to inspect and clean battery terminals every six months or as needed.

What are the signs of battery corrosion?

  • Signs include white, greenish, or bluish deposits on the battery terminals.

Are home remedies effective for cleaning battery corrosion?

  • Yes, home remedies like baking soda and water are effective for cleaning mild corrosion.