Corrosion inhibition performance and mechanism of PESA and its derivative

LIU Xinhua; WANG Wenjing; ZHAO Xinqiang; TONG Xinjia; DING Yunfei; SU Hong

doi:10.11949/j.issn.0438-1157.20141095

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Corrosion inhibition performance and mechanism of PESA and its derivative

更新时间：2025-12-10

- Corrosion inhibition performance and mechanism of PESA and its derivative
- CIESC Journal Issue 2, Pages: 695-702(2015)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141095
  CLC： Q085
- Online First：05 February 2015，
  
  Published：05 February 2015
- 稿件说明：
移动端阅览
LIU Xinhua, WANG Wenjing, ZHAO Xinqiang, et al. Corrosion inhibition performance and mechanism of PESA and its derivative[J]. CIESC Journal, 2015, (2): 695-702.
DOI：

LIU Xinhua, WANG Wenjing, ZHAO Xinqiang, et al. Corrosion inhibition performance and mechanism of PESA and its derivative[J]. CIESC Journal, 2015, (2): 695-702. DOI： 10.11949/j.issn.0438-1157.20141095.

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。

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

S heteroatoms in CSN-PESA.

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