Coated metal article

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C - Chemistry, Metallurgy

03

C

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C03C 10/04 (2006.01) C03C 10/00 (2006.01) C23C 24/10 (2006.01) C23D 5/00 (2006.01) C23D 13/00 (2006.01) A61F 13/00 (2006.01) A61F 13/02 (2006.01)

Patent

CA 1333032

There is disclosed a coated article composed of a metal alloy substrate, the metal alloy having a nickel, chromium, cobalt or iron base, and a coating that serves as an oxygen barrier to insulate the metal surface from oxygen attack at temperatures which may range up to 1200°C. The coating comprises a glass-ceramic selected from barium silicate and strontium silicate systems characterized by additives that enable forming a continuous well flowed glass coating prior to setting of the coating by crystalli- zation. These additives include the refractory oxides Al2O3, ZrO2 and Y2O3, the transition metal oxides MnO, CoO, NiO and FeO, and MgO.

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