Electrochemical corrosion can occur, only if ________________ is present in contact with metal?

Electrochemical corrosion can occur, only if ________________ is prese

1.	Electrochemical corrosion can occur, only if ________________ is present in contact with metal?
A.	Air
B.	Oxygen
C.	Liquid medium
D.	Gaseous medium
Answer» D. Gaseous medium

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Electrochemical corrosion can occur, only if ________________ is present in contact with metal?

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