Patent ID: 9598775
Date: 2017-03-21
CPC Classifications: C23C,F01D,Y10T

Claim:
1. A multilayer overlay system for a metal substrate comprising: a basecoat layer formed by applying a slurry comprising chromium oxide (Cr2O3) pigment particles dispersed in a phosphate-based binder, the basecoat layer having a thickness of between about 0.5 to 3.0 mils; and a second layer formed by applying a slurry comprising metal oxide pigment particles dispersed in a phosphate-based binder, wherein the metal oxide pigment particles comprises chromium oxide pigment particles having an enhanced dispersibility due to a narrow particle size distribution and optimized surface area, the second layer having a thickness of between about 0.1 to 1.0 mil, wherein the narrow particle size distribution is characterized in that the 50 wherein the 90 wherein the surface area of the metal oxide pigment particles in the second layer comprises chromium oxide pigment particles in a range between about 4 m