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Which of the following metal is/are corrosion resistant to hydrofluoric acid?

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in Corrosion Engineering by (98.5k points)
Which of the following metal is/are corrosion resistant to hydrofluoric acid?

(a) Hastelloy C

(b) Monel

(c) Hastelloy C and Monel

(d) Titanium

I have been asked this question in an online interview.

My enquiry is from Materials in chapter Materials of Corrosion Engineering

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Right option is (c) Hastelloy C and Monel

Easiest explanation: Hastelloy C and Monel are corrosion-resistant metals to hydrofluoric acid. Whereas titanium and most other metals usually corrode in hydrofluoric acid.

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