Question

Define wet or electrochemical corrosion.Explain its mechanism

Answer 1

Answer:

Wet Corrosion: Wet corrosion involves reactions in aqueous medium. The conducting surface of the metal undergoes an electrochemical reaction with the moisture & oxygen present in the atmosphere. Ex: Rusting of Iron. Wet corrosion can be better explained on the basis of electrochemical theory.

Explanation:

Wet Corrosion is the most common form of corrosion. It will occur if an “electrochemical cell” is produced. An electrochemical cell consists of an Anode, a Cathode, a Connection, and an Electrolyte. ... Wet corrosion therefore involves an oxidation reaction at the anode and a reduction reaction at the cathode.

Electrochemical corrosion of metals occurs when electrons from atoms at the surface of the metal are transferred to a suitable electron acceptor or depolarizer . Water must be present to serve as a medium for the transport of ions. The most common depolarizers are oxygen, acids, and the cations of less active metals.

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