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Method of coating an iron-based article

United States Patent

November 29, 2016
View the Complete Patent at the US Patent & Trademark Office
A method of coating an iron-based article includes a first heating step of heating a substrate that includes an iron-based material in the presence of an aluminum source material and halide diffusion activator. The heating is conducted in a substantially non-oxidizing environment, to cause the formation of an aluminum-rich layer in the iron-based material. In a second heating step, the substrate that has the aluminum-rich layer is heated in an oxidizing environment to oxidize the aluminum in the aluminum-rich layer.
Magdefrau; Neal (Tolland, CT), Beals; James T. (West Hartford, CT), Sun; Ellen Y. (South Windsor, CT), Yamanis; Jean (South Glastonbury, CT)
United Technologies Corporation (Hartford, CT)
13/ 613,188
September 13, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under contract number DE-NT0003894 awarded by United States Department of Energy. The government has certain rights in the invention.