boilers Inhibitors function in Cooling Towers, Evaporative condensers, Stem Boilers and hot water Boilers. -By adsorption as a thin film on to surface of acorroding materials. -By inducing formation of a thick corrosion product. -By changing characteristics of the environment either by producing protective precipitates or removing or inactivating an aggressive constituent so that it dose not corrode the materials. Weight(0.25-25)Kg.