_____________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C ?
Correct answer: D. Calorising
- A. Veneering
- B. Galvanising
- C. Electroplating
- D. Calorising
Explanation
Calorising is a thermochemical treatment in which aluminium diffuses into the steel surface and forms a protective alumina film during service. This coating gives high resistance to oxidation and corrosion at elevated temperature.
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