Abstract

UGI, B. U.; OMALIKO, E. C.  and  IKPI, M. E.. Artequick® as Inhibitor of ASTM A36 Mild Steel Corrosion through Anodic Sites Dissolution: Computational and Electrochemical Approach. Port. Electrochim. Acta [online]. 2024, vol.42, n.3, pp.155-171.  Epub Mar 31, 2023. ISSN 0872-1904.  https://doi.org/10.4152/pea.2024420301.

ATK was investigated to ascertain its IE(%) on ASTM A36 MS corrosion in a HCl medium. This was possible through the use of WL, Td, Tm, PDP, EIS and SEM techniques. It was observed from all experimental results that, through adsorption onto the MS surface, ATK mitigated active corrosion sites. CR was seen to decrease with increased inhibitor Ct from 197.6 to 19.3 mg/hr-1/cm2. IE(%) of ATK, which rose from 50 to 90.2%, with a corresponding increase in Ct, from 150 to 750 ppm, was more improved by PPQ than by ATS addition. An increase in Rct, up from 346 to 1153 Ω/cm2, and a decrease in icorr, from 312.2 to 64.4 mA, were observed, with higher Ct of ATK, which indicated reduced anodic dissolution and better CI. A mixed type CI was deduced from Tafel slopes of PDP results. A physical adsorption mechanism was proposed, while, in Td terms, ATK exhibited a stable and spontaneous reaction mechanism.

Keywords : ASTM A36 MS; ATK; ATS; corrosion; computational and electrochemical studies; EIS; PDP; PPQ; SEM.

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