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CYCLIC OXIDATION AND HOT CORROSION BEHAVIOR OF Pd-Ni-Al COATINGS

Xiaofeng Sun

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Abstract

The behavior of cyclic oxidation at 1323K and high temperature hot corrosion in Na 2SO 4 melt at 1173K of Pd Ni Al coatings was studied, The coating was prepared by low temperature high activity pack aluminizing technology on nickel based superalloy M38 with a thin layer of pre\|electroplated Pd Ni alloy. The Pd Ni Al coating showed excellent performance in cyclic oxidation as well as in Na 2SO 4 hot corrosion tests. Palladium not only stabilizes the protective β phase, but also dramatically increases the hot corrosion resistance of coatings.

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What this paper is about

The behavior of cyclic oxidation at 1323K and high temperature hot corrosion in Na 2SO 4 melt at 1173K of Pd Ni Al coatings was studied, The coating was prepared by low temperature high activity pack aluminizing technology on nickel based superalloy M38 with a thin layer of pre\|electroplated Pd Ni alloy. The Pd Ni Al coating showed excellent performance in cyclic oxidation as well as in Na 2SO 4 hot corrosion tests. Palladium not only stabilizes the protective β phase, but also dramatically increases the hot corrosion resistance of coatings.

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Available abstract

The behavior of cyclic oxidation at 1323K and high temperature hot corrosion in Na 2SO 4 melt at 1173K of Pd Ni Al coatings was studied, The coating was prepared by low temperature high activity pack aluminizing technology on nickel based superalloy M38 with a thin layer of pre\|electroplated Pd Ni alloy. The Pd Ni Al coating showed excellent performance in cyclic oxidation as well as in Na 2SO 4 hot corrosion tests. Palladium not only stabilizes the protective β phase, but also dramatically increases the hot corrosion resistance of coatings.

Key concepts: Materials science, Corrosion, Superalloy, Electroplating, Coating, Metallurgy, Palladium, Alloy

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