甲酸
腐蚀
重量分析
介电谱
吸附
缓蚀剂
电化学
极化(电化学)
金属
化学
有机酸
质子化
无机化学
化学工程
核化学
材料科学
电极
有机化学
物理化学
离子
工程类
作者
K.R. Ansari,Dheeraj Singh Chauhan,Ahmad A. Sorour,M.A. Quraishi,Akeem Yusuf Adesina,Ambrish Singh
标识
DOI:10.1016/j.jcis.2023.08.190
摘要
Organic acids are employed as scale dissolvers in the oil & gas industry during production to stimulate oil recovery by pumping in the formations. Corrosion of metallic surfaces in organic acid solutions poses a significant issue in the oil and gas sector. In recent years, considering the stringent environmental regulations, there has been a growing research interest in environmentally safe inhibitors. This paper explores the synthesis of 2-(3-(carboxymethyl)-1H-imidazol-3-ium-1-yl) acetate (IZ) and its first-time application for corrosion mitigation of N80 steel in 20% formic acid. A detailed experimental study involving gravimetric, electrochemical, and surface analytical techniques is reported herein. The electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) analyses suggest a rise of impedance with IZ and a mixed-type inhibition behavior, respectively. The inhibition efficiency (IE) is 99.54% at 200 mg/L at 308 K, reaching 99.4% at 363 K with the introduction of KI as a synergistic agent. Computational studies revealed that the inhibitor IZ gets protonated in the experimental environment. The protonated form shows a tendency to receive electrons from the metal surface and shows a greater energy of adsorption compared to that of the neutral form.
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