Which metal forms a protective passive oxide layer that prevents further corrosion and is therefore widely used to make stainless steel?

Step-by-step solution

1. Identify the metal that develops a thin, adherent oxide film.
2. Chromium forms a dense layer of $C{r}_2{O}_3$ that protects the underlying metal.
3. This property is the basis for stainless steel alloys.

Concept tested: Corrosion resistance of chromium

Published 1 October 2026 · How this solution was prepared and checked