The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the (A) Water alkalinity & leakage
(B) Hydrazine addition during feed water treatment
(C) Release of non-condensable gas from water in the boiler
(D) Scale formation
(B) Hydrazine addition during feed water treatment
(C) Release of non-condensable gas from water in the boiler
(D) Scale formation