Which one of the following is <strong>NOT</strong> true for anodizing process?
- A. It makes aluminium corrosion resistant.
- B. Metals like aluminium, titanium and magnesium can be anodized.
- C. Clean aluminium article is the anode and oxygen gas is evolved at the cathode. ✓
- D. It is used in aircraft industry.
Correct Answer: C. Clean aluminium article is the anode and oxygen gas is evolved at the cathode.
Explanation
During anodizing, the clean aluminium article is made the anode, but the oxygen gas is evolved at the anode itself, not the cathode, which reacts with aluminium to form the protective oxide layer.
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