Adsorption and corrosion inhibition of new synthesized thiophene Schiff base on mild steel X52 in HCl and H2SO4 solutions
Adsorption and corrosion inhibition of new synthesized thiophene Schiff base on mild steel X52 in HCl and H2SO4 solutions
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DOI：
10.1016/j.corsci.2013.10.025
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发表时间：
2014-02-01
影响因子：
8.3
通讯作者：
Chafaa, Salah
中科院分区：
文献类型：
--
作者：
Daoud, Djamel;Douadi, Tahar;Chafaa, Salah
合成了(NE)-N-(噻吩-3-基亚甲基)-4-({4-[(E)-(噻吩-2-基亚甲基)氨基]苯基}间乙基)苯胺(L)，通过不同的腐蚀方法考察了其对低碳钢X52在1 M盐酸和1 M硫酸中的缓蚀作用， 如失重、动电位极化和电化学阻抗谱 (EIS)。实验结果表明，该化合物是一种高效的缓蚀剂，缓蚀效率随着缓蚀剂浓度的增加而增加。该化合物在低碳钢表面的吸附遵循朗缪尔等温线。使用密度泛函理论方法 (DFT) 讨论了量子化学计算与所研究化合物的抑制效率之间的相关性。 (C) 2013 Elsevier Ltd. 保留所有权利。
(NE)-N-(thiophen-3-ylmethylidene)-4-({4-[(E)-(thiophen-2-ylmethylidene)amino]phenyl}m-ethyl)aniline (L) was synthesized and its inhibiting action on the corrosion of mild steel X52 in 1 M hydrochloric acid and 1 M sulfuric acid was examined by different corrosion methods, such as weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The experimental results suggest that this compound is an efficient corrosion inhibitor and the inhibition efficiency increases with the increase in inhibitor concentration. Adsorption of this compound on mild steel surface obeys Langmuir's isotherm. Correlation between quantum chemical calculations and inhibition efficiency of the investigated compound is discussed using the Density Functional Theory method (DFT). (C) 2013 Elsevier Ltd. All rights reserved.