TP20-24: Constructing Non-P Passivation Films for Cooling Applications: Surface Science PerspectiveTo comply with environmental regulations or to ameliorate an existing calcium phosphate fouling issue, more customers are looking for non P cooling corrosion control programs. Simply transitioning from a calcium phosphate to a non P corrosion control program is relatively seamless due to the slow dissolution of the existing calcium phosphate passivation film to the new non P passivation film. A more difficult transition is when the surface is neat due