Chromium added to steel does not: (A) Increase hardness, (B) Increase tensile strength, (C) Increase corrosion resistance, (D) Decrease elastic limit
Answer is D. Chromium forms a very thin, transparent, adherent layer of Cr2O3 through a process called passivation, which provides a barrier to diffusion of oxygen and other corrosive species and it prevents further corrosion of the underlying alloy.
Ref: Phillip’s 12th edition page 127.