Corrosion resistance

Pressureless sintered silicon carbide is almost universally corrosion-resistant. It resists against all common acids (e.g. hydrochloric acid, sulfuric acid, hydrobromic acid, and hydrofluoric acid), bases (e.g. amines, potash and caustic soda), all solvents, and oxidizing media (e.g. nitric acid).

The graph below shows the corrosion rates of silicon carbide in mg/cm2.a with different chemicals. Considering the density of SiC, 9.9 mg/cm2.a is equivalent to 32.5 μm/a or 1.28 mpy. 0.2 mg/cm2.a is equivalent to 0.65 μm/a or 0.02 mpy.

Corrosion rates in mg/cm2.a

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