Effect of chromium addition to the low temperature hot corrosion resistence of platinum modified aluminide coatings.
Dust, Mark W.
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Marine gas turbines face many adverse conditions such as reduced fuel quality and a salt environment which present the sulfur, chloride, and sulfates required to initiate and propagate hot corrosion. A particularly severe type of hot corrosion is low temperature hot corrosion (LTHC) encountered at the low temperatures (600-750°C) used for low power destroyer operations. Plat inu m-aluminides have demonstrated great success as protective coatings which delay the onset of hign temperature hot corrosion attack (80 0- 1000°C) . Chromium is known to provide good LTtiC resistance. The effect of chromium addition to platinum-aluminide coatings was investigated using two different nickel-base superalloys, IN-738 (16% Cr) and IN-100 (10% Cr). .
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