Patent ID: 9157140
Filing Date: 2015-10-13
Classification: C23C,Y02T,Y10T

Abstract:
1. A coating process for protecting a surface of a substantially chromium-free metal component, the coating process comprising: combining a liquid and a dopant that is dissolvable in the liquid to form a substantially chromium-free, silicon-containing liquid composition; applying a layer of the substantially chromium-free, silicon-containing liquid composition to the surface of the substantially chromium-free metal component; after the layer is applied, placing the substantially chromium-free metal component in a non-oxidizing atmosphere; and after the metal component is placed in the non-oxidizing atmosphere, heating the layer to a temperature greater than 400° F. to form a substantially chromium-free, silicon-containing protective coating on the surface that includes silicon from the silicon-containing liquid composition and a metal from the substantially chromium-free metal component.