Which of the following materials are protected by passivation (i.e., formation of a thin adherent film
Which of the following materials are protected by passivation (i.e., formation of a thin adherent film

Q. Which of the following materials are protected by passivation (i.e., formation of a thin adherent film on the surface) from corrosion?

P. Aluminium alloys

Q. Mild steel

R. Stainless steel

S. Silver

(A) P & Q                  (B) Q & R          (C) Q & S          (D) P & R

Ans: P & R
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