Abstract
We study the corrosion properties of a composite material based on tungsten carbide on a nickel binder and doped with graphite or chromium and vanadium carbides. It is shown that the introduction of graphite in the VN20 composite decreases its corrosion resistance in a 3-% NaCl solution. The addition of 2 and 4% graphite makes the corrosion current densities 2 and 2.5 times higher, respectively. Doping of the composite with vanadium carbide in amounts of 0.15 and 1% increases the corrosion currents, whereas the introduction of 1% of chromium carbide weakens these currents by about an order of magnitude.
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