The control of pathogens in food processing facilities plays an important part in ensuring the safety of our food supply. Among other requirements, the USDA mandates that equipment is carefully cleaned to remove soil and then sanitized to disinfect surfaces. Often these two processes involve chemicals which, if not selected and applied properly, have the potential to corrode and damage the metal surfaces of evaporator coils. This technical bulletin discusses sources of corrosion, corrosion resistance of various metals used in evaporator coils, and makes recommendations regarding the selection of coil construction and accompanying cleaning and sanitizing chemicals appropriate for the operating environment.