Coal gasification burner shield coating
AssigneeEastman Chemical Company
InventorGary Scott Whittaker
Life of this patent
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Abstract
A method for protecting a synthesis gas generator burner heat shield includes coating the burner heat shield with an overlay alloy coating composition of the formula MCrAlY wherein M is selected from the group consisting of iron, nickel, and cobalt. In a preferred embodiment, the coating includes from about 20-40 weight % Co, 5-35 weight % Cr, 5-10 weight % Ta, 0.8-10 weight % Al, 0.5-0.8 Y, 1-5 weight % Si and 5-15 weight % Al2O3.
Claims3
A method for protecting a synthesis gas generator burner heat shield composed substantially of molybdenum comprising coating said burner heat shield with an overlay alloy coating composition consisting of from about 20-40 weight % Co, 5-35 weight % Cr, 5-10 weight % Ta, 0.8-10 weight % Al, 0.5-0.8 weight % Y, 1-5 weight % Si and 5-15 weight % Al2O3.
Dependencies are inferred from the claim text.