_____________ is added in stainless steel to prevent inter crystal corrosion?
Correct answer: B. Niobium
- A. Vanadium
- B. Niobium
- C. Chromium
- D. Nickel
Explanation
Niobium stabilizes stainless steel by forming stable niobium carbides, preventing chromium carbide formation at grain boundaries and therefore reducing intergranular corrosion. Chromium provides general passivity, but it does not perform this stabilizing role.
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