New 1-(2-pyridinyl)-2-(o-, m-, p-hydroxyphenyl) benzimidazoles as corrosion inhibitors for API 5L X52 steel in acid media

• Published in: Anti-corrosion methods and materials Vol. 65; no. 2; pp. 166 - 175
• Main Authors: Rodriguez-Clemente, Edelmira, Barrera-Pascual, Victoria, Cervantes-Cuevas, Humberto, Aldana-González, Jorge, Uruchurtu-Chavarin, Jorge, Romero-Romo, Mario, Palomar-Pardavé, Manuel
• Format: Journal Article
• Language: English
• Published: Bradford Emerald Publishing Limited 23.03.2018; Emerald Group Publishing Limited
• Subjects: Analytical methods; Carbon steel; Chromatography; Corrosion; Corrosion inhibitors; Corrosion tests; Electrochemical impedance spectroscopy; Electrochemistry; Electrodes; High strength low alloy steels; Inhibitors; NMR; Nuclear magnetic resonance; Petroleum; Petroleum industry; Residence time; Steel; Steel pipes; Benzimidazoles; Inhibitors; Residence time; Steel; Corrosion inhibition efficiency
• ISSN: 0003-5599; 1758-4221
• DOI: 10.1108/ACMM-06-2017-1811

Purpose This paper aims to evaluate the corrosion inhibition capacities of synthesized compounds 1-(2-pyridinyl)-2-(o, m-, p-hydroxyphenyl) benzimidazoles in API 5L X52 steel/HCl 1M corrosion system. Design/methodology/approach Electrochemical impedance spectroscopy technique was used. Findings The studies determined that under stagnant conditions, the durability and efficiency were maintained over 80 per cent for up to 500 h of immersion, while the residence time started to decrease after 150 h at the best inhibitor concentration (150 ppm). Practical implications This work may help to attenuate corrosion problems in the petroleum industry. Originality/value It is the first time that 1-(2-pyridiniy)-2-(o-, m-, p-hydroxyphenyl) benzimidazoles were evaluated as corrosion inhibitors.