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Arrange the following in the ascending order of their degree of corrosion.

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Arrange the following in the ascending order of their degree of corrosion.

(a) Zinc >> Magnesium  >> Copper >> Lead >> Aluminium

(b) Copper >> Lead >> Aluminium >> Zinc >> Magnesium

(c) Zinc >> Magnesium >> Lead >> Copper >> Aluminium

(d) Copper >> Aluminium >> Zinc >> Lead >>  Magnesium

This question was addressed to me during an online exam.

I need to ask this question from Galvanic Series topic in division Corrosion, Electrolysis, Fuel Cells and Batteries of Engineering Chemistry II

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The correct answer is (b) Copper >> Lead >> Aluminium >> Zinc >> Magnesium

Easy explanation: The correct order is Copper >> Lead >> Aluminium >> Zinc >> Magnesium. Magnesium is the most active towards corrosion and copper is the least active towards corrosion among the given elements.

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