Which of the following is an example of cathodic protection of metals against corrosion ?
Correct answer: C. Galvanised iron
- A. Painted steel
- B. Case hardened steel
- C. Galvanised iron
- D. Lead lined reactor
Explanation
In galvanised iron, zinc acts as a sacrificial anode and corrodes preferentially, keeping the underlying iron cathodic and protected. Paint provides a barrier but is not, by itself, cathodic protection.
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