Abstract
The effect of chain length compatibility on corrosion the inhibition effect of mixed inhibitor systems of cationic gemini surfactant, l,4-butan-bis (dodecyl dimethyl ammonium bromide) (designated as 12-4-12) with nonionic co-surfactants, C7OH (1-heptanol), C12OH (1-dodecanol) and C15OH (1-pentadecanol), on low carbon steel in acid medium was studied using weight loss, open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) measurements. The data demonstrated that the corrosion rate decreased by increasing surfactant concentration. In addition, less chain length difference causes more compatibility and inhibition on behavior of surfactant and co-surfactant mixture. Inhibition efficiency for C12OH + gemini surfactant was increased compared to the other mixtures explored.
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