What Causes Corrosion On Positive Battery Terminal. I like preventing battery terminal corrosion even better than cleaning it. Car battery corrosion is usually caused by hydrogen gas being released from the battery acid.
The fact that this is happening only at one terminal suggests the the seal at the other. If you fill your battery with water resulting in overfill of your car battery then this may cause the electrolyte to seep through the vents leading to corrosion of the battery terminals. Battery corrosion is caused by hydrogen gas being released from the sulfuric acid inside the battery.
How to Clean Car Battery Terminals.
Simply disconnect the battery starting with the negative terminal. A reaction of hydrogen with another gas such as sulfate can cause corrosion. I like preventing battery terminal corrosion even better than cleaning it. Although lead in the battery terminal is relatively inert the Sulphuric Acid does cause some corrosion.
