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