Patents

Metal Components With Silicon-Containing Protective Coatings Free Of Chromium

July 7, 2014

U.S. 8,623,461 B2
MT Coatings LLC has obtained a patent for a coating process for protecting a surface of a substantially chromium-free metal component, the coating process is comprised of combining a substantially chromium-free silicon-containing fluid composition comprised of a silane liquid with a dopant that is dissolvable in the silane liquid and is selected from the group consisting of yttrium, hafnium, and combinations thereof; applying a layer of the substantially chromium-free, silicon-containing fluid composition to at least a portion of the surface; curing the substantially chromium-fee, silicon-containing fluid composition after the layer is applied to the surface; placing the cured substantially chromium-free, silicon-containing fluid composition in layer in a non-oxidizing atmosphere before heating; and heating the cured substantially chromium-free, silicon-containing fluid composition in layer to a temperature of approximately 70 percent of the melting temperature of the substantially chromium-free component or to the eutectic temperature of silicon and the metal constituting the substantially chromium-free metal component to form a substantially chromium-free, silicon-containing protective coating on the surface  that includes silicon from the cured silicon-containing fluid composition and metal from the metal component.