Corrosion resistance of steel is increased by adding
A
Chromium and nickel
B
Nickel and molybdenum
C
Aluminium and zinc
D
Tungsten and sulphur
Correct Answer: Chromium and nickel
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.