Three new reduced forms of synthesized Schiff bases as potent anti-corrosion inhibitors for carbon steel in artificial seawater

IF 3.4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Mechanical and Materials Engineering Pub Date : 2024-09-26 DOI:10.1186/s40712-024-00177-5
Hojat Jafari, Elham Ameri, Fariba Soltanolkottabi, Avni Berisha
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Abstract

As part of the development of a new organic entity, we synthesized three new reduced forms of Schiff bases named 2,2’-(((2,2-dimethylpropane-1,3-diyl)bis(azanediyl)bis(methylene)disphenol (I1), 4,4’-(((2,2-dimethylpropane-1,3-diyl)bis (azanediyl)bis(methylene)bis(2-methoxyphenol) (I2), and 6,6’-(((2,2-dimethylpropane-1,3-diyl) bis(azanediyl)bis(methylene)bis(2-methoxyphenol) (I3). In order to develop new organic ligands to inhibit steel corrosion in 1M HCl solution, various electrochemical methods, such as electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP), along with surface visualization through atomic force microscopy (AFM), were employed. PDP results revealed excellent inhibition by compound I3 (71%) at a concentration of 1 mg/L. These findings were supported by the observation of a protective layer formation during prolonged immersion of steel in a corrosive solution, with or without inhibitors. In addition to gaining insights into the interaction mechanism and adsorption mode, density functional theory, Monte Carlo, and molecular dynamic simulations were conducted, revealing valuable information about the interaction of the inhibitors with the steel surface. Average surface roughness (Ra) values obtained for the artificial seawater in the absence and presence of inhibitor are 887 nm for blank, 195 nm for I1, 158 nm for I2, and 105 nm for I3.

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合成席夫碱的三种新还原形式作为人工海水中碳钢的强效防腐蚀抑制剂
作为新有机实体开发的一部分,我们合成了三种新的席夫碱还原形式,分别命名为 2,2'-((2,2-二甲基丙烷-1,3-二基)双(偶氮二基)双(亚甲基)二苯酚 (I1)、4,4'-(((2,2-二甲基丙烷-1,3-二基)双(偶氮二基)双(亚甲基)双(2-甲氧基苯酚)(I2),以及 6,6'-(((2,2-二甲基丙烷-1,3-二基)双(偶氮二基)双(亚甲基)双(2-甲氧基苯酚)(I3)。为了开发新的有机配体来抑制 1M HCl 溶液中的钢腐蚀,研究人员采用了多种电化学方法,如电化学阻抗谱(EIS)和电位极化(PDP),并通过原子力显微镜(AFM)进行表面观察。电位极化结果表明,在浓度为 1 毫克/升时,化合物 I3 具有出色的抑制作用(71%)。无论是否使用抑制剂,在腐蚀性溶液中长期浸泡钢材都会形成保护层,这也为上述发现提供了佐证。为了深入了解抑制剂与钢表面的相互作用机理和吸附模式,还进行了密度泛函理论、蒙特卡罗和分子动力学模拟,揭示了抑制剂与钢表面相互作用的宝贵信息。在没有抑制剂和有抑制剂的情况下,人工海水的平均表面粗糙度 (Ra) 值分别为:空白 887 nm、I1 195 nm、I2 158 nm 和 I3 105 nm。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
8.60
自引率
0.00%
发文量
1
审稿时长
13 weeks
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