Resumo

MEGALAI, S.M. et al. Metronidazole: A Corrosion Inhibitor for Mild Steel in Aqueous Environment. Port. Electrochim. Acta [online]. 2012, vol.30, n.6, pp.395-403. ISSN 0872-1904.  https://doi.org/10.4152/pea.201206395.

The inhibition efficiency (IE) of metronidazole (MZ)-Zn(II) system in controlling corrosion of mild steel in aqueous solution containing 60 ppm of Cl^- ion has been evaluated by weight loss method. Weight loss study reveals that the formulation consisting of 140 ppm of MZ and 50 ppm of Zn(II) has 84% inhibition efficiency in controlling corrosion of mild steel immersed in aqueous solution containing 60 ppm of Cl^- ion. Polarization study reveals that this system as a mixed type of inhibitor controlling the cathodic and anodic reaction to an equal extent. AC impedance reveals that a protective film is formed on the metal surface. The FTIR spectra revealed that the protective film consists of Fe(II)-MZ complex.

Palavras-chave : metronidazole drug; mild steel; corrosion inhibition; weight loss; polarization; AC impedance.

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