Preventing and Removing Car Battery Corrosion

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Written By Jasmine Young

Jasmine Young is a passionate writer and researcher specializing in battery technology, with a keen interest in its applications across various industries and its role in shaping a sustainable energy future.

Car battery corrosion can cause issues with the electrical system of your car and lead to decreased battery life and performance. In this article, we will discuss why and how to prevent and clean car battery corrosion. We will also suggest preventive measures and cleaning methods to keep your vehicle’s battery in good condition and avoid any issues with the electrical system.


As a car owner, one of the essential things you should pay attention to is the health and condition of your car’s battery. Any problem with your car battery, including corrosion buildup, can affect the performance and lifetime of the battery, as well as the overall health of your vehicle.

Battery terminal corrosion is a common problem that occurs due to various factors, such as hydrogen or electrolyte leakage, chemical reactions with copper clamps, or overcharging. Routine maintenance and proper care are essential to prevent corrosion buildup and protect your car’s electrical system.

Why You Should Remove Battery Corrosion

Battery terminal corrosion can cause many issues with your car’s electrical system. Some common symptoms of battery corrosion include insufficient power, slow engine start, or even electrical faults and failures. Here are some reasons why you should remove battery corrosion:

  • Prevent electrical faults and issues with the electrical system of your car.
  • Prolong the battery lifespan and reduce the need for a battery replacement.
  • Improve the overall performance and health of your vehicle.
  • Save money on battery repair and replacement cost estimate.

Regular battery maintenance is necessary to ensure good battery health and avoid any problems with the electrical system. In the next section, we will explore how to clean battery corrosion and suggest various ways to prevent it.

How to Clean Battery Corrosion

Cleaning battery corrosion can be a DIY process for some, while others may require the skills of expert technicians or repair professionals. However, before cleaning the battery corrosion, it is necessary to ensure your safety by taking some safety measures such as wearing gloves and safety glasses. Here are some ways to clean car battery corrosion:

  • Baking soda-water solution: Mix baking soda with water to form a thick paste. Then, apply the mixture to the corroded battery terminals with an old toothbrush. The solution will cause the corrosion to bubble and loosen up. After that, gently remove the corrosion using a wire brush and wipe the battery using a damp cloth.
  • Cola: Cola can be an efficient and affordable solution for cleaning battery corrosion. Pour a small amount of cola over the corroded battery terminals, let it sit for a few minutes, and then remove the corrosion using a wire brush or old toothbrush.
  • Battery cleaners: Various battery cleaners available in the market can be used to clean battery corrosion. Follow the instructions provided with the cleaner and clean the corrosion buildup. These solutions usually help dissolve the rust or the greenish substance on the battery terminals.

Regardless of the cleaning method, make sure to thoroughly clean the battery terminals for optimal results. Felt pads, felt washers, or terminal protectors can also be used to protect the battery terminals and prevent corrosion.

Ways to Prevent Battery Corrosion

Preventing battery corrosion is a vital part of car maintenance that can enhance the lifetime of the battery and keep the car’s electrical system functioning correctly. Here are some preventive measures for battery corrosion:

  • Check the battery regularly: Regular inspection of the battery can help to identify corrosion buildup signs and other issues that can affect battery performance. Use a multimeter to measure the voltage and verify if the battery is charging correctly.
  • Monitor driving behavior: Short rides or inconsistent recharging can cause undercharging, leading to hydrogen gas formation that can cause corrosion on positive/negative terminals. Avoid overcharging or overfilling the battery, which can cause vented hydrogen gas to react with copper clamps that lead to chemical reactions and corrosion on the battery terminals.
  • Use anti-corrosion washers: Felt battery washers, anti-corrosion washers, or battery-terminal grease can help prevent corrosion by protecting the battery terminals from chemical reactions and corrosion elements. Copper compression terminals can provide a better connection and prevent corrosion.
  • Use protective grease: Lubricating grease, such as petroleum jelly, wheel bearing grease, or protective battery grease, can help protect terminals and prevent corrosion.
  • Avoid overcharging: Overcharging can cause charging instability and damage to the battery and electric components. Ensure that the car battery charger matches your car’s battery specifications.
  • Use rust and corrosion prevention sprays: Rust inhibitor spray or anti-corrosive sprays can be used to prevent and reduce corrosion buildup.
  • Schedule regular maintenance: Routine maintenance and scheduled maintenance can help avoid any underlying problems with the battery and avoid corrosion buildup.


In conclusion, car battery corrosion is a problem that can lead to decreased battery life and performance. It is essential to keep your battery in good health to avoid issues with the electrical system and prolong the battery lifespan. You can prevent corrosion buildup by following some simple measures such as using anti-corrosion washers, checking the alternator, and avoiding overcharging or overfilling. It is also necessary to clean the battery corrosion regularly for optimal performance. With proper care and maintenance, you can maintain your car’s battery lifespan and ensure its good health.