Presence of SO 2 in furnace gases attacks the ferrous metal by way of – McqOptions

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1.	Presence of SO 2 in furnace gases attacks the ferrous metal by way of
A.	accelerating the rate of scaling.
B.	causing metal embrittlement.
C.	attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature.
D.	all (a), (b) and (c).
Answer» E.

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