Why Battery Terminal Corrosion. Copper is a very good conductor but it is not immune to corrosion. If a battery is leaking sulfuric gases it can combine with the current being sent through the clamps causing a chemical reaction.
According to the experts overcharging is the sole cause of positive terminal corrosion at the contact point. Generally if the corrosion is occurring on the negative terminal your system is probably undercharging. Spread newspaper over the surface where you plan to work and since there.
Corrosion on the terminals is due to hydrogen gas being released from the acid in the battery.
If you see a white deposit on the battery terminals its a sign that you need to change the battery. Corrosion buildup on a battery terminal appears as a white blue or greenish substance with a powdery granular texture. Keeping them the same will reduce the problem. If a battery is leaking sulfuric gases it can combine with the current being sent through the clamps causing a chemical reaction.
