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US 12,129,554 B2Granted
Bi-layer protective coatings for metal components
AssigneeCallidus Process Solutions Pty Ltd.
InventorsDuncan Bews, Robert Smith, Evelyn Ng
Life of this patent
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Abstract
A bi-layer protective coating for a metal component, the bi-layer protective coating comprising a bond coating that is metallurgically fused to a substrate of the metal component, wherein the bond coating comprises one or more rare metals and a top coating that is mechanically bonded to the bond coating, wherein the top coating comprises one or more metal oxides, or one or more metal carbides.
Claims6
A bi-layer coating on a substrate of a metal component, the bi-layer coating comprising:
- a first layer that is metallurgically fused to the substrate and which comprises one or more of zirconium, vanadium, niobium, and tantalum;
- and
- a second layer that is mechanically bonded to the first layer and which comprises one or more oxides of titanium, chromium, or silicon, or one or more carbides of tungsten or chrome, wherein the metal component comprises a valve trim part of a ball valve for use in a corrosive environment of a high-pressure acid leaching (HPAL) or pressure oxidation (POX) hydrometallurgical process.
Dependencies are inferred from the claim text.