Scale and Corrosion Prevention in Cooling Water Systems Part II: Calcium Sulphate

摘要: This paper describes an experimental study on calcium sulphate scaling and prevention by newly treated poly- acrylamide in a laboratory model. In order to the inhibiting capacity of chemical used, experiments were per- formed solutions involving treatment synthetic sea water with different concentrations polymer. Polyacryla- mide gave significantly lower precipitation rate compared absence inhibitor. The inhibitor probably is adsorbed active growth sites initially crystals. performances scale analyzed terms amount soluble ions solution. results showed that was reduced 0.00%, with, 10-15 ppm polymer additions, after 1 day incubation at 90°C. Antiscale agents specific deposits have recently been developed tested scale. work also extended corrosion inhibition polyacrylamide both C-steel copper specimens contact cooling environment. Electrochemical polarization techniques reveal acts as anodic type respect mixed for copper. Corrosion current jcorr CR inhibi- tion efficiency IE% increases additions. effects are due formation protective film. Morphological investigation CaSO4. 2H2O gypsum crystals indicate reduction cal- cium presence indicated scanning electron microscopic (SEM) studies.