Which metal is added to steel to make it stainless steel?
Correct answer: A. Chromium
- A. Chromium
- B. Aluminium
- C. Carbon
- D. Copper
Explanation
Chromium forms a thin, self-repairing oxide layer on steel, protecting it from rust and corrosion. Aluminium can also resist corrosion, but it is not the defining addition in stainless steel.
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