Question

The excellent corrosion resistance of high-silicon irons is due to the formation of a passive SiO2 surface layer.

(a) True

(b) False

I have been asked this question during an interview for a job.

My question is based upon Materials in section Materials of Corrosion Engineering

Answer 1

Correct option is (a) True

Explanation: High-silicon cast iron is the type of alloy cast Irons that are formed with high silicon content (up to 14%). The excellent corrosion resistance of these alloys is due to the formation of a passive SiO2 layer.