US Patent Issued to Praxair S.T. Technology on March 18 for "Chromate-free inorganic coating systems for hot corrosion protection of superalloy substrate" (Indiana Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,628, issued on March 18, was assigned to Praxair S.T. Technology Inc. (North Haven, Conn.).

"Chromate-free inorganic coating systems for hot corrosion protection of superalloy substrate" was invented by Irina Belov (Zionsville, Ind.), Zhihong Tang (Carmel, Ind.), Mark W. Perpall (Indianapolis), Daryl G. Copeland (Greenwood, Ind.) and Brian D. Fitzwater (Indianapolis).

According to the abstract* released by the U.S. Patent & Trademark Office: "Hexavalent chromium-free slurry formulations which are suitable in the production of inorganic overlay coating systems are described. The formulations provide superior hot corrosion and high-temperature oxidation protection for superalloy s...