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Which of the following type of stainless steels are attacked by magnesium at its melting point?

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Which of the following type of stainless steels are attacked by magnesium at its melting point?

(a) Duplex stainless steels

(b) Austenitic stainless steels

(c) Martensitic stainless steels

(d) Ferritic stainless steels

I have been asked this question in final exam.

Origin of the question is Environments in section Other Environments of Corrosion Engineering

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The correct option is (b) Austenitic stainless steels

Explanation: Austenitic stainless steels are the types of stainless steels that are attacked by magnesium at its melting. Liquid magnesium preferentially leaches out nickel from this alloy from the iron matrix.

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