聚环氧琥珀酸及其衍生物的缓蚀性能及缓蚀机理

doi:10.11949/j.issn.0438-1157.20141095

化工学报 ›› 2015, Vol. 66 ›› Issue (2): 695-702.DOI: 10.11949/j.issn.0438-1157.20141095

聚环氧琥珀酸及其衍生物的缓蚀性能及缓蚀机理

柳鑫华^1,2, 王文静³, 赵新强¹, 佟欣佳², 丁云飞², 苏红²

1 河北工业大学化工学院, 天津 300130;
2 河北联合大学轻工学院, 河北唐山 063000;
3 河北联合大学化工学院, 河北唐山 063009

收稿日期:2014-07-21 修回日期:2014-09-22 出版日期:2015-02-05 发布日期:2015-02-05
通讯作者: 柳鑫华

Corrosion inhibition performance and mechanism of PESA and its derivative

LIU Xinhua^1,2, WANG Wenjing³, ZHAO Xinqiang¹, TONG Xinjia², DING Yunfei², SU Hong²

1 School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;
2 School of Light Industry, Hebei United University, Tangshan 063000, Hebei, China;
3 School of Chemical Engineering and Technology, Hebei United University, Tangshan 063009, Hebei, China

Received:2014-07-21 Revised:2014-09-22 Online:2015-02-05 Published:2015-02-05

摘要/Abstract

摘要：

使用静态失重法和腐蚀电化学法研究了聚环氧琥珀酸(PESA)及其硫脲改性的衍生物(CSN-PESA)在自来水环境中对A3碳钢的缓蚀作用,探讨了聚环氧琥珀酸及其衍生物在A3碳钢表面的吸附作用,通过量子化学理论研究了聚环氧琥珀酸及其硫脲改性的衍生物缓蚀机理。研究结果表明:聚环氧琥珀酸及其硫脲改性的衍生物具有一定的缓蚀性能,CSN-PESA的缓蚀率大于PESA;聚环氧琥珀酸及其衍生物在A3碳钢表面产生的缓蚀效果是物理、化学共同吸附的结果,与Langmuir等温式相符合;聚环氧琥珀酸及其衍生物对阴极、阳极有一定的抑制作用。量子化学计算表明:聚环氧琥珀酸衍生物缓蚀率高于聚环氧琥珀酸的主要原因是CSN-PESA分子中的轨道密度主要分布在O、N、S这些杂原子附近。

关键词: 聚合物, 电化学, 吸附, 计算化学, 缓蚀机理

Abstract:

The corrosion inhibition and adsorption behavior of PESA and CSN-PESA were investigated as corrosion inhibitors for A3 carbon steel corrosion in tap-water by static mass loss and electrochemical methods. Inhibition mechanism of PESA and CSN-PESA was studied with quantum chemistry theory. PESA and CSN-PESA both showed corrosion inhibition performance in tap-water corrosion environment. The inhibition efficiency of CSN-PESA was better than PESA. The adsorption belonged to mix-type adsorption mainly dominated by chemisorption and physisorption, and followed Langmuir isotherm. PESA and its derivative had inhibitory effect on the cathode and anode. Quantum chemistry calculation showed that the main reason for better inhibition efficiency of CSN-PESA was that molecular orbital densities were mainly distributed in near the O, N, S heteroatoms in CSN-PESA.

Key words: polymers, electrochemistry, adsorption, computational chemistry, inhibition mechanism

中图分类号:

TQ085

柳鑫华, 王文静, 赵新强, 佟欣佳, 丁云飞, 苏红. 聚环氧琥珀酸及其衍生物的缓蚀性能及缓蚀机理[J]. 化工学报, 2015, 66(2): 695-702.

LIU Xinhua, WANG Wenjing, ZHAO Xinqiang, TONG Xinjia, DING Yunfei, SU Hong. Corrosion inhibition performance and mechanism of PESA and its derivative[J]. CIESC Journal, 2015, 66(2): 695-702.

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聚环氧琥珀酸及其衍生物的缓蚀性能及缓蚀机理

Corrosion inhibition performance and mechanism of PESA and its derivative

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