Abstract

OYEWOLE, O.; ADEOYE, J. B.; LUCAS, M.  and  OLUGBEMI, W.. Optimization Study of Eggshell Extract as Inhibitor of Mild Steel Corrosion in a 30 wt% NaCl Solution. Port. Electrochim. Acta [online]. 2024, vol.42, n.2, pp.123-136.  Epub Jan 31, 2024. ISSN 0872-1904.  https://doi.org/10.4152/pea.2024420204.

Corrosion is a major challenge faced in industries, which has to be addressed by using inhibitors. The aim of this study was to investigate ESE as I of MS in a 30 wt% NaCl solution. ESE was subjected to Pc analysis, to identify the presence of active ingredients that would create a good CI. CI of ESE at different C was investigated using WL, PDP, SEM, FTIR and EDXS techniques, to characterize MS samples. The best process level from the experimental design was observed at T of 24.4 ºC, IT of 6 days and ESE C of 0.4 g/L, with IE (%) of 95.5 %. The presence of metabolites in ESE was confirmed by Pc analysis, which suggested the extract was a good I. Results from PDP and WL techniques were in good agreement. SEM, FTIR and EDS data revealed that the optimal process level produced more protective film on the MS surface. It was concluded that ESE acted as a good and environmentally friendly I.

Keywords : CR; EDXS; FTIR; IE (%); optimization; PDP; SEM; WL.

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