alexa Synergistic inhibition of carbonsteel corrosion in 0.5 M HCl solution by indigo carmine and somecationicorganic compounds: experimental and theoreticalstudies


Journal of Steel Structures & Construction

Author(s): Zhe Zhang, Ningchen Tian

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The synergistic corrosion inhibition effect of indigo carmine and three kinds of cationic organic compounds on 1045 carbon steel (CS) in 0.5 M HCl solution is reported. Electrochemical measurements showed that these three cationic organic compounds combined with indigo carmine reduce the speed of corrosion on 1045 CS and act as effective inhibitors. The combination of indigo carmine with BAB resulted in the best synergistic corrosion inhibition effect (S = 17.14), and the best inhibition efficiency (95.0%). SEM images and XPS data of the corroded steel surfaces suggested that the indigo disulphonate anion and organic cation could be simultaneously adsorbed on the CS surface to inhibit the corrosion of iron. The synergistic inhibition mechanism was investigated by dynamic simulations using quantum chemistry.

This article was published in RSC Advances and referenced in Journal of Steel Structures & Construction

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