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The phenomenon by which a metal or alloy show high corrosion resistance due to the formation of the highly protective film is called ____________

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The phenomenon by which a metal or alloy show high corrosion resistance due to the formation of the highly protective film is called ____________

(a) Electrolysis

(b) Electrodialysis

(c) Galvanisation

(d) Passivation

This question was addressed to me in an international level competition.

My question is based upon Galvanic Series in division Corrosion, Electrolysis, Fuel Cells and Batteries of Engineering Chemistry II

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The correct option is (d) Passivation

The best explanation: The phenomenon by which a metal or alloy shows high corrosion resistance due to the formation of the highly protective film is called passivation. Passivation is the use of a light coat of protective material, such as metal oxide, to create a shell against corrosion.

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