Al-based coatings were prepared by Al-based cored wire and arc spraying.Their microstruc-ture and oxidation and corrosion resistance were also investigated.Al-based coatings were consisted of AlFe, AlFe3, Al2O3, AlFe0.25Ni0.77 and AlNi mainly; and after heat treatment for 1h at 800℃, high-aluminum new phases such as Al13Ni4, Al86Fe14, Al5FeNi appeared in the coatings, and they improved Al-based coatings hardness.Oxidation and corrosion resistance of Al-based coatings were better than that of Fe-based coatings, and oxidation resistance of Al-Fe-Ni-B coatings was close to that of 45CT, and corrosion resistance of Al-Ni-Cr coatings was nearly same as that of 45CT.
Key words
arc spraying /
Al-based coating /
microstructure /
oxidation resistance /
corrosion resistance /
intermetallic compound
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References
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