STUDY OF HOT CORROSION RESISTANCE MECHANISMS OF ARC   SPRAYING COATINGS

Abstract

Abstract: According to the working condition of boiler tubes of power station, hot corrosion tests were carried out at two temperatures (650℃ and 800℃) to simulate the environment of coal fired boiler. The hot corrosion resistance and mechanism of three arc spraying coatings (SL30, 45CT and FeCrAl) have been studied. The result showed that coating SL30 and 45CT have a better protection ability against hot corrosion. It indicated that a protective Cr 2O 3 scale formed on the surface of coating SL30 and coating 45CT.

Key words: arc spraying, coating, hot corrosion

S.N .Ma, Q.Liu and C.Q. Li Surface Engineering Research Institute of CMES, Beijing 100072, China. STUDY OF HOT CORROSION RESISTANCE MECHANISMS OF ARC SPRAYING COATINGS[J]. Acta Metallurgica Sinica (English Letters), 1999, 12(5): 1007-1013.

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STUDY OF HOT CORROSION RESISTANCE MECHANISMS OF ARC SPRAYING COATINGS

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