How To Clean A Corroded Battery Contact. I bought this Lego Mindstorms RCX brick on eBay for cheap because it said it didnt work. Corrosion is caused by a completely expected chemical reaction due to hydrogen gas building pressure and ultimately needing to escape from inside a battery.
How do you clean corroded contacts. Prepare a Safe Workspace. This is how to clean the blue-green-white corrosion from battery contacts caused by alkaline batteries.
However attempting to remove corrosion without knowing the proper way to do it is risky.
A brass or steel brush is the most common method of scrubbing off oxidation although for sensitive contacts nylon is also used. Protect your skin with rubber gloves while cleaning corroded batteries. After a thorough cleaning your device should work like new. Battery acid should not come in contact with the skin.
