Inhibitor Protection of Raw-Water Heaters against Corrosion and Scaling

We propose a new technological procedure aimed at the protection of pipes of raw-water heaters made of 20 steel against corrosion and scaling by using the KORSOL-1M inhibitor (based on phosphates). For the optimal concentration of the inhibitor Cinh = 200 mg/liter, the time of continuous operation of heat-exchange pipes of raw-water heaters increases up to 5–6 months. During the downtime, it is reasonable to apply “soft” chemical cleaning because the layer of scale on the steel surface become amorphous and thin (≈ 1 mm) and can easily be removed from the surface. The time of chemical cleaning is halved. In raw water, the KORSOL-1M inhibitor does not impair the operation of the subsequent chain of mechanical and ion-exchange filters.