Corrosion Pitting of SiC by Molten Salts

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Abstract
The corrosion of by thin films of and at 1000°C is characterized by a severe pitting attack of the substrate. A range of different Si and substrates was examined to isolate the factors critical to pitting. Two types of pitting attack are identified: attack at structural discontinuities and a crater‐like attack. The crater‐like pits are correlated with bubble formation during oxidation of the . It appears that bubbles create unprotected regions, which are susceptible to enhanced attack and, hence, pit formation.

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