corrosion

Corrosion is the natural process by which metals deteriorate or break down due to chemical reactions with their environment, typically involving moisture, oxygen, or other corrosive agents. In painting and construction, corrosion often refers to the rusting of steel or iron when exposed to water and air, which can weaken structures and damage surfaces. Protective coatings, such as primers and paints, are commonly used to prevent or slow down corrosion on metal surfaces.