THE EFFECT OF NANOCRYSTALLIZATION ON HOT CORROSION BEHAVIOR OF K38G ALLOY AT 900℃

J Chin Soc Corr Pro

2003, Vol. 23

Issue (1): 1-6 DOI:

Research Report

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THE EFFECT OF NANOCRYSTALLIZATION ON HOT CORROSION BEHAVIOR OF K38G ALLOY AT 900℃

Shujiang Geng;Shenglong Zhu;Fuhui Wang

中科院金属所;金属腐蚀与防护国家重点实验室

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Shujiang Geng; Shenglong Zhu; Fuhui Wang. THE EFFECT OF NANOCRYSTALLIZATION ON HOT CORROSION BEHAVIOR OF K38G ALLOY AT 900℃. J Chin Soc Corr Pro, 2003, 23(1): 1-6 .

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Abstract The sputtered nanocrystalline coating of K38G alloy was obtained by magnetron sputtering.The effect of nanocrystallization on the h ot corrosion behavior of K38G alloy at 900℃ was studied.The results indicated t hat the internal sulfidation was eliminated for the coating by pre-deposition wi th 0.8 mg/cm2 of 75%Na2SO4+25%K2SO4.Although the internal sulfides wer e still formed for the coating by pre-deposition with 3 mg/cm2 of 75%Na2SO 4+25%K2SO4,the hot corrosion resistance of K38G alloy was clearly enhanced t hrough nanocrystallization.The hot corrosion mechanism was proposed.

Key words: K38G sputtered nanocrystalline coating hot corrosion

Received: 13 July 2001

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