Abstract

NKIKO, M. O.. Evaluating the Deterioration of Galvanized Steel in an Acidic Medium using Pinus Oocarpa Seed Extract as Inhibitor. Port. Electrochim. Acta [online]. 2022, vol.40, n.2, pp.79-87.  Epub Apr 30, 2022. ISSN 0872-1904.  https://doi.org/10.4152/pea.2022400202.

Pinus oocarpa seed extract corrosion inhibition effect on galvanized steel has been studied in 2 M hydrochloric acid, at 303 K and 333 K, by gravimetric methods. The inhibitor efficiency decreased with higher temperatures, which suggests physisorption. Potassium iodide (KI) synergistic action produced an increase in the extract inhibition efficiency, but its parameter decreased with higher inhibitor concentrations. The galvanized steel optical microscopy shows that the metal surface was coated with P. oocarpa seed extract, and that the cracks observed in the inhibitor absence were filled. This observation suggests that the extract can be used as a coating to prevent galvanized steel corrosion.

Keywords : corrosion inhibitor, optical microscopy, gravimetric methods, P. oocarpa; synergistic effect.

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