Abstract
The corrosion behavior of carbides has been studied by an electrochemical method in sodium chloride solution at 50°C. The anodic dissolution current of tungsten carbide and vanadium carbide readily increased with a little polarization from immersion potential. Tungsten carbide formed a thick corrosion product (WO3·2H2O). The corrosion product of vanadium carbide was slight by reason that the rate of its dissolution probably exceeded the rate of formation of oxide. Rapid anodic dissolution of titanium carbide and chromium carbide begun at about 0.5V (vs. Ag/AgCl), in the trans-passive region. Niobuim carbide was stable in sodium chloride solution.
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More From: Journal of the Society of Materials Science, Japan
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