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Mechanical Engineering · Q249

Engineering Materials

Engineering and GATE · Mechanical Engineering · question 249

Q249

Corrosion resistance of steel is increased by adding

A.
Chromium and nickel
Answer
B.
Nickel and molybdenum
C.
Aluminium and zinc
D.
Tungsten and sulphur

Answer: Option A

Solution

Answer: Option A
Solution:
Chromium is a powerful alloying element in steel.
It strongly increases the hardenability of steel, and markedly improves the corrosion resistance of alloys in oxidizing media.
Nickel is added to steels to increase hardenability.
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