When metallic materials are put into corrosive environments, they tend to have chemical reactions with the air and/or water. The effects of corrosion become evident on the surfaces of these materials. Metal equipment lacking any preventive (anti-corrosive) measures may become rusted both inside and outside, depending on atmospheric conditions and how much of that equipment is exposed to the air. Anti-corrosion measures are of particular importance in environments where high humidity, mist, and salt are factors. There are a number of methods for preventing corrosion which the most effective one is painting treatments on the surface. In this method, anti-corrosive paint acts as a barrier that inhibits contact between chemical compounds or corrosive materials with the metal housing.