Invention Grant
US09365932B2 Erosion and corrosion resistant coatings for exhaust gas recirculation based gas turbines 有权
基于排气再循环的燃气轮机的侵蚀和耐腐蚀涂层

Erosion and corrosion resistant coatings for exhaust gas recirculation based gas turbines
Abstract:
A compressor blade for use in a compressor section of a gas turbine engine, comprising: a martensitic stainless steel compressor blade and an abrasive coating having an anodic component. The compressor blade has a blade portion, a dovetail portion and a platform portion intermediate the blade portion and the dovetail portion, the blade portion terminating in a tip opposite the dovetail portion. A cobalt-based coating overlies at least the blade portion of the compressor blade. The cobalt-based coating comprises a cobalt based material that includes precipitates of tungsten carbide that provide erosion resistance and particles of a sacrificial metal-based material distributed through the cobalt-based coating that provide galvanic corrosion resistance to the system.
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