Car battery corrosion is something most drivers don’t notice until it’s too late and their vehicle won’t start up. If you look closely, you may see a white or green powdery residue on your battery connections. Damage to your automobile battery, as well as electrical issues, can be caused by corrosion.

The rusting of a car’s battery is a common concern. The battery acid (sulfuric acid) dissolves the metal, resulting in corrosion. Removing battery rust as soon as possible is critical if you see it. Corrosion may spread and worsen if left unchecked.

Corrosion from your battery connections may be removed in one of two methods. Commercial battery cleaners or baking soda and water can be used to clean your battery. Corrosion on a car battery may be cleaned using these techniques.

Make Sure Your Car Was Off

To begin, be sure that your vehicle has been completely shut off. Working with live electrical components is strictly prohibited. This is a precaution to keep you and your car safe.

Connecting Cables

Afterward, disconnect the battery’s connection cords. The black, or negative, the cable is the one you should begin with. This prevents a spark from igniting if the vehicle’s metal accidentally touches the red or “positive” line. If hydrogen gas accumulates near the battery, an explosion will occur. Remove the red cable after removing the black cable.

Scrub The Corroded Area

Using a wire brush, remove the rusted material. This will aid in the removal of any corrosion that has built up. The battery terminals and the battery can also be checked for any damage. The battery/terminal should be replaced if it has cracks or leaks.

Use a Cleaning Agent

A battery cleaning agent is the first method you can try. Until the corrosion is gone, spray the battery with the cleaning agent. Use a wire brush to scrub the rust while wearing thick rubber gloves to keep your hands safe.

Use of Baking Soda and Water

Baking soda is a popular household item; therefore, this is a more frequent procedure. You’ll need two cups of water and one spoonful of baking soda. Allow 15-20 minutes after application of the solution to neutralize any battery acid that may have leaked out of the damaged regions. Afterward, use a towel to wipe down and dry the affected area.

Wires Should Be Connected In Reverse Order

Clean and dry the area before attaching the cables in the opposite sequence. Begin with the red cable, of course. Once the black cable is done, you’re done. Don’t over-tighten the cables, but make sure they’re snug.

The final step is to check for any more corrosion and, if necessary, repeat the process.

Checking for more corrosion after replacing the wires is a good idea. This is extremely important to know if you notice any greenish-white powder near the battery connections. It’s easy to keep going back and forth until the region is rust-free.


Cleaning a battery terminal that has become corrupted is a simple task. When working with any form of battery acid, though, it’s necessary to be cautious. If you don’t feel confident working on your automobile on your own, you should get it serviced by a qualified technician. Clean the terminals and inspect them for any additional damage that may have occurred.