Corrosion resistance of steel is increased by addition of
a) Chromium and nickel
b) Sulphur, phosphorus, lead
c) Vanadium, aluminium
d) Tungsten, molybdenum, vanadium, chromium
Corrosion resistance of steel is increased by addition of
a) Chromium and nickel
b) Sulphur, phosphorus, lead
c) Vanadium, aluminium
d) Tungsten, molybdenum, vanadium, chromium
