2006•Transactions of the China Welding InstitutionRequires access

Corrosion resistance of Al-based coating prepared by arc spraying

LI Zhuo-xin

Abstract

Al-based coating is prepared by arc spraying using Al-based cored wire.High-temperature oxidation resistance and corrosion resistance of Al-based coating are compared with that of Fe-Al coating and 45CT coating.Also H_2S corrosion resistance of Al-based coating is compared with that of Fe-Al coating and A304 stainless steel.The results shows that Al-based coating has excellent high-temperature oxidation resistance under 650 ℃.In the case of saline corrosion and H_2S corrosion,only the surfaces of Al-based coating are eroded and the corrosion surface is very thin.The inside of the coatings is not eroded at all.Thus Al-based coating has excellent corrosion resistance.

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Key concepts: Corrosion, Coating, Materials science, Metallurgy, Composite material