Balasubramanian Senthilmurugan, Jayaprakash Sandhala Radhakrishnan and Misfera Al-Qahtani
Keywords: Corrosion, scale inhibitor, calcite, dual inhibitor, maleic acid, copolymer, flow assurance
Abstract: Corrosion and scaling are two common and major problems encountered in water treatment systems. In this study, we have investigated the dual behavior of a maleic acid based copolymer on scale and corrosion inhibition for solving both the problems together. Two different types of maleic acid – ortho toluidine (MA-OT) copolymer were synthesized by varying the proportion of monomers and characterized by FTIR spectroscopy. The anti-scaling properties of the polymer towards CaCO3 scale were studied through chemical and electrochemical screening tests at different pH, temperature and inhibitor concentration. The corrosion inhibition performance of the copolymer was tested through weight loss method and through optical and scanning electron microscopes. The effect of copolymer on the calcite scale crystal morphology and structures were examined through SEM. Statistical methods such as analysis of variance (ANOVA) and response surface methodology were used to analyze the data and model the performance of the dual inhibitor.
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