Scale inhibitor :100% is a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling functions of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects of metal equipment. The anti-corrosion and anti-scaling agent of cold exchange equipment is formulated with epoxy resin and specific amino resin as the base material, adding an appropriate amount of various anti-rust, anti-corrosion and other auxiliaries, which is a one-component. It has excellent shielding, impermeability, rust resistance, good scale resistance, thermal conductivity, excellent resistance to weak acids, strong alkalis, organic solvents and other properties, its adhesion is strong, and the film layer is bright, flexible, dense and hard.