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Which of the following metals that usually results in a porous and volatile oxide layer?(a) Magnesium(b) Molybdenum(c) Sodium(d) Magnesium, sodium, and molybdenumThe question was asked in homework.I would like to ask this question from Materials in portion Materials of Corrosion Engineering

Answer»

Right choice is (d) MAGNESIUM, sodium, and molybdenum

Easiest EXPLANATION: If the Pilling-bed worth ratio of a particular metal is less than 1 then it results in a porous, VOLATILE, and thin oxide layer. Sodium, molybdenum, and magnesium are examples of this kind.



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