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In a galvanic couple, the corrosion rate of the metal with active corrosion potential is accelerated whereas the corrosion rate of noble metal retards preferentially.

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In a galvanic couple, the corrosion rate of the metal with active corrosion potential is accelerated whereas the corrosion rate of noble metal retards preferentially.

(a) True

(b) False

The question was asked during an internship interview.

Asked question is from Modern Theory Applications topic in section Modern Theory Applications of Corrosion Engineering

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Correct answer is (a) True

The best I can explain: In a galvanic couple, one metal acts as the anode (active corrosion potential), and its corrosion rate is accelerated whereas other acts as the cathode (noble metal) and its corrosion rate are retards preferentially.

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