INTERVIEW QUESTIONS
CORROSION
1. For a protective oxide layer to form, the ratio of the volume of oxide formed to that of metal consumed should be
Answer:
>1
2. The key properties required for good oxidation resistance of an oxide film are
Ans:
Low electrical conductivity and continuous oxide film
3. What are the elements that are added to iron to improve its oxidation resistance?
Ans:
Chromium , Aluminum and Nickel
4. The peak in corrosion rate of martensite occurs when
Ans:
Tempered at about 400deg C
5. What is the 18-8 stainless steel?
Ans:
Stainless steel that contains 18% Cr and 8% Ni
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