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Why straight chromium stainless steels and austenitic stainless steels are not recommended for hydrofluoric acid applications?

Why straight chromium stainless steels and austenitic stainless steels are not recommended for hydrofluoric acid applications? Correct Answer Due to susceptibility to pitting

Straight chromium stainless steels and austenitic stainless steels are not recommended for hydrofluoric acid applications due to their susceptibility to pitting corrosion. Whereas (410) of stainless steel is sensitive to erosion-corrosion.

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