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Synergistic Inhibition Effect of 3-Carboxypyridine and Potassium Iodide on Mild Steel Corrosion in H2SO4: Electrochemical and Surface Analyses

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Resumo:Abstract The effective inhibition of MS corrosion in H2SO4 by CP and CP + KI was assessed by EIS. SM of MS was studied using SEM and AFM. The rise in Rct and decrease in Cdl, with higher C of CP only and CP + KI, confirmed MS CI. IE (%) increased with higher C of CP only and CP + KI (from 10-3 to 10-1 M). CP’s maximum IE (%) was 93.9%, at 10-1 M. CP + KI, due to I- ions synergistic effect, showed an IE (%) of about 98.8% at 10-1 M. CP only and CP + KI adsorption mechanism followed Langmuir’s isotherm. SM studies suggested that a barrier film of CP only and CP + KI, mitigated MS surface corrosion. CP + KI is an efficient inhibitor in H2SO4.
Autores principais:Dheer,Neelu
Outros Autores:Kalra,Amarpreet K.; Singh,Darshan; Ujjain,Sanjeev Kumar; Ahuja,Preety; Singh,Gurmeet; Singh,M. Ramananda; Kanojia,Rajni
Assunto:AFM corrosion CP EIS IE (%) KI MS SM SEM
Ano:2024
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Fundação para a Ciência e Tecnologia
Idioma:inglês
Origem:SciELO Portugal

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