Inhibition effect of two mercaptopyrimidine derivatives on cold rolled steel in HCl solution

Inhibition effect of two mercaptopyrimidine derivatives on cold rolled steel in HCl solution
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两种巯基嘧啶衍生物在HCl溶液中对冷轧钢的缓蚀作用

DOI:
10.1016/j.corsci.2014.11.044
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发表时间:
2015-03
期刊:
影响因子:
8.3
通讯作者:
Guanben Du
Guanben Du
中科院分区:
材料科学1区
文献类型:
--
作者:
Xianghong Li;Xiaoguang Xie;Shuduan Deng;Guanben Du

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采用失重、动电位极化曲线、电化学阻抗谱(EIS)、扫描电镜(SEM)、量子化学计算和分子动力学(MD)模拟等方法研究了4-氨基-6-羟基-2-巯基嘧啶(AHMP)和4,6-二羟基-2-巯基嘧啶(DHMP)两种巯基嘧啶衍生物在HCl溶液中对冷轧钢(CRS)的抑制作用。结果表明,两种巯基嘧啶衍生物均为较好的抑制剂,抑制效率依次为:AHMP - bb0 - DHMP。两种缓蚀剂在钢表面的吸附均服从Langmuir吸附等温线。两种巯基嘧啶衍生物是混合型抑制剂。抑制剂分子以近乎平坦的方式吸附在Fe(0 0 1)表面。
The inhibition effect of two mercaptopyrimidine derivatives of 4-amino-6-hydroxy-2-mercaptopyrimidine (AHMP) and 4,6-dihydroxy-2-mercaptopyrimidine (DHMP) on cold rolled steel (CRS) in HCl solution was studied by weight loss, potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), quantum chemical calculation and molecular dynamics (MD) simulations methods. The results show that both mercaptopyrimidine derivatives act as good inhibitors, and inhibition efficiency follows the order: AHMP > DHMP. The adsorption of either inhibitor on steel surface obeys Langmuir adsorption isotherm. Two mercaptopyrimidine derivatives are mixed-type inhibitors. The inhibitor molecules adsorb on the Fe (0 0 1) surface in the nearly flat manner.
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发表时间: 2010-01-15
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