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Corrosion resistance of steels is increased by the addition of alloying elements like

[A].	Sulphur	[B].	Silicon and sulphur
[C].	Chromium and nickel	[D].	Cobalt and vanadium
[E].	Tungsten

Answer: Option D

B.Kanakarajan said:

corrosion resistance of steel is increased by adding chromium and nickel only.

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