The synergistic effect has been studied in the presence of a dicarboxylic acid inhibitor with or without bivalent cation like zinc ions. A protective film has been formed on the carbon steel surface in aqueous solution using a synergistic combination of an environmentally friendly dicarboxylic acid (thiomalic acid) and zinc ions. The corrosion inhibition effect of thiomalic acid with zinc ions on carbon steel has been carried out by weightloss studies and electrochemical techniques.

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... mic polarization studies reveal that the inhibitor system is of an anodic type.. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to investigate the nature of protective film formed on the carbon steel surface and for explaining the mechanistic aspects of the inhibition process. Inhibition of corrosion ... thiomalic acid-Zn 2+ system SK Selvaraj et al., 97 Int J Nano Corr Sci and Engg 3(1) (2016) 96-109 Editors: Prof S Rajendran , M Pandiarajan and P Nithya Devi