| abstract |
The invention discloses a composite treatment method of cast aluminum alloy passivation and dacromet for integrated stove gas valve. First, the surface of the aluminum alloy gas valve is derusted, then alkali degreasing and degreasing, and then washed with water to obtain a pretreatment part one; The first pretreated part is immersed in a trivalent chromium salt passivation solution for passivation, washed with water, then sealed with hot water and dried to obtain the second pretreated part; finally, the second pretreated part is coated with dacromet for the first time, and heated After solidification, cooling is performed to obtain the first dacromet treated part, and the second dacromet coating is carried out, and the composite treated part with corrosion resistance and bright color is obtained after heating and solidification and then cooling. Dacromet is sprayed, then heated to solidify and then cooled to obtain composite treated parts with corrosion resistance and uniform color. The coating film obtained by the composite passivation method provided by the invention achieves good anticorrosion performance and meets production requirements. |