2011•Cailiao baohuRequires access

Effect of Heat Treatment on Microstructure and Corrosion Resistance of Electrodeposited Nickel-Tungsten Alloy Coating

Peng Chao

Abstract

Direct current electrodeposited Ni-W alloy coating was heat treated so as to increase its microhardness and corrosion resistance.The effects of heat treatment temperature and time on the microstructure,hardness and corrosion resistance of the coating were investigated.It was found that heat treatment within a proper range of temperature and time contributed to significantly increased hardness and corrosion resistance of the coating.The coating heat treated at 500 ℃ for 1 h had the best comprehensive properties,possessing microhardness as much as 1 010.44 HV and good corrosion resistance in 3.5% NaCl solution.

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Key concepts: Materials science, Corrosion, Microstructure, Coating, Metallurgy, Indentation hardness, Alloy, Tungsten