Electrochemical corrosion can occur, only if ________________ is present in contact with metal?
Correct answer: C. Liquid medium
- A. Air
- B. Oxygen
- C. Liquid medium
- D. Gaseous medium
Explanation
Electrochemical corrosion requires an electrolyte so that ions can move between anodic and cathodic regions. A liquid or sufficiently moist medium provides this conducting path, whereas air or a dry gas alone does not.
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