Abstract
Electrochemical oxidation of ZrB2 and MoSi2 refractory compounds as well ZrB2–MoSi2 ceramics in a 3% NaCl solution is studied using the method of polarization curves, quantitative AES, and SEM. It is established that the highest corrosion resistance is observed in the case of composites with a small amount (~5–10 wt.%) of MoSi2 due to their stable passivation at comparatively low anodic potentials. It is shown that the corrosion rate of a molten ZrB2 sample is 90% lower than that of a hot-pressed one.
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