Patent ID: 6440499
Filing Date: 2002-08-27
Classification: C23C

Abstract:
A method for producing a corrosion resistant and an oxidation-resistant coating on a component, said method comprising:forming a slurry by mixing a binder solution with (1) a base powder selected from the group consisting of (a) MCrAlY, wherein M is at least one element selected from the group consisting of Ni and Co, (b) NiCrAl and (c) mixtures of (a) and (b), and (2) an added powder of Al or Al and one or more elements selected from the group consisting of Pt, Pd, and Si, said base and added powders having a grain size between 5 and 120 &mgr;m; applying said slurry onto a component made of a superalloy based on nickel or cobalt; hardening the slurry on the component to form a hardened slurry coating by heating the slurry to a temperature between room temperature and 450Â° C.; and heat treating the hardened slurry coating to produce diffusion thereof into the component by heating the coated component at a temperature between 750Â° C. and 1250Â° C., thereby forming a corrosion-resistant and oxidation-resistant coating on said component.