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Which of the following metal is highly resistant to crevice corrosion?

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Which of the following metal is highly resistant to crevice corrosion?

(a) Stainless steel

(b) Copper

(c) Aluminum

(d) Hastelloy C-276

I have been asked this question by my college director while I was bunking the class.

The above asked question is from Eight Forms topic in chapter Eight Forms of Corrosion of Corrosion Engineering

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Correct option is (d) Hastelloy C-276

Explanation: Hastelloy C-276 is the best crevice corrosion-resistant metal. The composition of Hastelloy C-276 is 15.5%Cr, 54.7%Ni, 15.5%Mo, 3.8%W, and 0.5%Mn. Whereas the other metals depend on oxide film for their corrosion resistance.

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