Resumo

MAOFARI, A. Al et al. Inhibition Study of Various Extracts of Tribulus Terrestris Plant on the Corrosion of Mild Steel in a 1.0 M HCl Solution. Port. Electrochim. Acta [online]. 2021, vol.39, n.1, pp.21-35.  Epub 01-Fev-2021. ISSN 0872-1904.  https://doi.org/10.4152/pea.202101021.

The inhibitive effect of different extracts of the Tribulus terrestris plant was estimated on the corrosion of mild steel in 1 M hydrochloric acid (HCl), using weight loss and Tafel polarization curves. The inhibition efficiency was increased with higher extracts concentrations. The effects of temperature on the corrosion behavior of mild steel in 1 M HCl, with the addition of extracts, were also studied. The inhibition efficiency obtained using tafel polarization curves and weight loss measurement gave similar results. Polarization curves showed that different extracts of the Tribulus terrestris plant behave as mixed type inhibitors in hydrochloric acid. The obtained results showed that the different extracts of the Tribulus terrestris plant act as an effective green inhibitor of mild steel corrosion in a hydrochloric acid solution. The corrosion inhibition of mild steel was confirmed by the scanning electron microscopy (SEM) study, which shows a good metal surface, without the presence of corrosion products.

Palavras-chave : Lead; cadmium; heavy metals; cosmetic and polarography..

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