Patent ID: 8070894

Claim:
A method of forming a metallic coating on an oxidized metal surface layer comprising: providing an atomized glass forming iron based metallic coating alloy wherein said alloy includes deoxidizing elements and an oxygen seeking nonmetal/metalloid, wherein said alloy consists of iron, manganese, chromium, molybdenum, tungsten, boron, carbon and silicon, wherein the elements are combined and present at a total of 100 wt %; and forming a metallic coating containing a fraction of metallic glass at a thickness of 40 mil to 110 mil by high velocity oxy fuel spray by melting said iron based metallic coating alloy to a liquid state; applying said liquid melt of said iron based metallic coating alloy to said oxidized metal surface, wherein said oxidized metal surface comprises a native oxide layer and removing said oxidized metal surface layer with said liquid melt of said iron based metallic coating alloy to provide a metal surface that is relatively clean of said oxidized metal surface layer and susceptible to receipt of a metallic coating and wherein said deoxidizing elements remove oxygen from the metal surface layer and said deoxidizing elements are present in said alloy melt such that said deoxidizing elements remain dissolved in said alloy melt to retain an affinity for oxygen and no primary precipitates are allowed to be formed in said alloy melt from said deoxidizing elements; and applying an iron based metallic coating alloy to said metal surface that is relatively clean of said oxidized metal surface layer wherein said iron based metallic coating has an ASTM C633 bond strength of at least about 12,000 psi without using a bond coat and said bond strength is present at said coating thickness from 40 mil to 110 mil and wherein failure of said coating does not occur at a coating/metal surface interface.