Patent ID: 8808802
Filing Date: 2014-08-19
Classification: C23C,Y10T

Abstract:
1. A method for preparing a contact corrosion resistant coating on a surface of titanium alloy part comprising: first step, carrying out degreasing and derusting to a titanium alloy part; second step, carrying out etching treatment on the titanium alloy part; third step, carrying out surface activation treatment on the titanium alloy part; fourth step, preheating the titanium alloy part in an atmosphere protection furnace; fifth step, submerging the preheated titanium alloy part in plating solution, turning the part during the submerging process; wherein in the fifth step, the preheated part is immersed in the plating solution for 1-5 minutes, wherein said plating solution mainly contains Al, Si, Zn, rare earth elements, microalloy elements and nanometer oxide particle reinforcing agent, wherein said microalloy elements are selected from one of or more than one of Mg, Fe, Cu, Mn, Cr and Zr, and said nanometer oxide particle reinforcing agent is selected from one or two of TiO.sub.2 and CeO.sub.2, and the mass percentage of the components of the plating solution is as follows: Si: 8-24%, Zn: 1.2-3.1%, rare earth elements: 0.02-0.5%, total content of the microalloy elements: 0.02-5.0%, total content of the nanometer oxide particle reinforcing agent: 1-2%, Al: the remainder; and sixth step, carrying out diffusion treatment, put the immersion-plated titanium alloy part in a vacuum furnace, atoms at an interface diffuse to form a diffusion layer on a substrate and thus form a plating diffusion composite layer on the surface of the titanium alloy part and thereby realizing metallurgical combination between the coating and the substrate.