Grid
A lead alloy frame construction on each plate in the battery. The grid functions as a carrier of the active materials, lead oxide and porous lead, which contribute to the electro-chemical processes during charging and discharging. The grid also conducts the current in the cell.
A destructive chemical reaction when metal is broken down in an aggressive chemical environment. Sulfuric acid, for example, is aggressive against iron. The iron breaks down and corrodes. The battery terminal is vulnerable to corrosion if it is not maintained correctly.