Design and synthesis of a novel class of inhibitors for mild steel corrosion in acidic and carbon dioxide-saturated saline media |
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| Affiliation: | 1. Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;2. Physics Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;1. Grupo de Pesquisa em Macromoléculas e Interfaces, Departamento de Química, Universidade Federal do Paraná – UFPR, CxP 19032, CEP 81531-980 Curitiba, PR, Brazil;2. Grupo de Biomateriais e Eletroquímica, Departamento de Engenharia Mecânica, Universidade Federal do Paraná – UFPR, CEP 81531-980 Curitiba, PR, Brazil;1. Institute of Functional Surfaces, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom;2. BP America, Inc., Houston, TX 77079, USA;1. Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Unidad Universitaria, km 4.5 Carretera Pachuca-Tulancingo, C.P. 42184 Pachuca-Hidalgo, Mexico;2. Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, México D.F. C.P. 04510, Mexico |
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| Abstract: | p-(9-(2-Methylisoxazolidin-5-yl)nonyloxy)benzaldehyde I, prepared using a cycloaddition protocol, was elaborated into its cinnamaldehyde derivative II which upon quarternization with propargyl chloride afforded III bearing an interesting blend of structural traits suitable for imparting inhibition of mild steel corrosion. Novel compounds I–III showed efficient inhibition against mild steel corrosion in CO2–0.5 M NaCl (40 °C, 1 atm; 120 °C, 10 bar), 1, 4, 7.7 M HCl, and 0.5 M H2SO4 at 60 °C as determined by gravimetry and electrochemical methods. The presence of carbonaceous surface and nitrogen, as revealed by XPS study, indicated the formation of a film covering the metal surface, which imparted corrosion inhibition. |
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| Keywords: | A. Mild steel B. Polarization B. Weight loss C. Acid corrosion C. Interfaces C. Thermodynamic diagrams |
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