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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