Abstract

PARAMESWARI, K. et al. Investigation of Benzothiazole Derivatives as Corrosion Inhibitors for Mild Steel. Port. Electrochim. Acta [online]. 2012, vol.30, n.2, pp.89-98. ISSN 0872-1904.  https://doi.org/10.4152/pea.201202089.

The influence of benzothiazole derivatives on corrosion inhibition of mild steel in 1 M H₂SO₄ was studied by weight loss, potentiodynamic polarization and AC-impedance techniques. The synergistic effect by the addition of halide ions had been studied. The experimental results showed that the inhibition efficiency increases with increasing inhibitor concentration, but decreases with increasing temperature; potentiodynamic polarization curves showed that benzothiazole derivatives acted as cathodic inhibitors in 1 M H₂SO₄. This was supported by the impedance measurements which showed a change in the charge transfer resistance and double layer capacitance, indicating adsorption of Benzothiazole derivatives on the mild steel surface. Atomic absorption spectroscopy studies showed that the inhibition efficiency increases with increasing inhibitor concentration.

Keywords : benzothiazoles; AC-impedance; potentiodynamic polarization; corrosion inhibitor.

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