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Corrosion behavior of WC-Co and WC-Ni in 3.5% NaCl at increasing temperature

Ismail, Azzura and Abd Aziz, Norhaslina (2014) Corrosion behavior of WC-Co and WC-Ni in 3.5% NaCl at increasing temperature. Applied Mechanics and Materials, 660. pp. 135-139. ISSN 1662-7482

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Abstract

Tungsten carbides (WC) are widely used as wear resistant components such as seal, valves, rings, nozzle and bearings. But in some processing operations, the environment necessarily includes severe corrosion or extremes of temperatures. In paper reveal, the corrosion performance of commercial cobalt tungsten carbide (WC-6%Co) and nickel tungsten carbide (WC-9%Ni) in seawater with 3.5% salinity. The experiment was performed in four different temperatures (20̊C, 40̊C, 60̊C and 80̊C) and the surface structure by corrosion attack was reveal under SEM. The Icorr value of WC-9%Ni is lower than WC-6%Co, elucidate that WC-9%Ni is better in corrosion resistance compare to WC-6%Co. As the temperature increased, the corrosion rate for every material increased as expected. Decreasing in hardness value for both materials reveal that, the material’s hardness decrease after corrosion has attacked.

Item Type: Article
Uncontrolled Keywords: WC-6%Co; WC-9%Ni; seawater; salinity; corrosion rate
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
Depositing User: Normajihan Abd. Rahman
Date Deposited: 27 Apr 2015 08:32
Last Modified: 27 Apr 2015 08:32
URI: http://eprints.uthm.edu.my/id/eprint/6370
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