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Which of the following are necessary in the process of corrosion?

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Which of the following are necessary in the process of corrosion?

(a) Anode

(b) Cathode

(c) Electrolyte

(d) Anode, Cathode and Electrolyte

This question was addressed to me during an online exam.

This intriguing question originated from Corrosion and its Classification topic in portion Corrosion Principles of Corrosion Engineering

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The correct choice is (d) Anode, Cathode and Electrolyte

For explanation: Corrosion occurs by the creation of electrochemical cell which includes a cathode, an anode and an electrolyte. A high reduction potential will act as cathode and other will acts as anode preferentially and electrolyte is needed to transfer ions between these two electrodes.

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