Question

Difference between galvanic corrosion and differential aeration corrosion

Answer 1

Differential Aeration Corrosion Cells. ... Oxygen not only enables a corrosion reaction by maintaining a cathodicreaction, but it can promote one. This occurs where there is a difference in the concentration of dissolved oxygenbetween two points of the same metal surface.

Answer 2

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When a metal is atacked by its surrounding air , moisture , acid etc it is said to be corroded . The process is called corrosion.

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.