2-氨基苯并噻唑与苯并三氮唑复配体系对Cu的缓蚀性能

doi:10.11902/1005.4537.2019.195

中国腐蚀与防护学报

2020, Vol. 40

Issue (6): 577-584 DOI: 10.11902/1005.4537.2019.195

研究报告

本期目录 | 过刊浏览

2-氨基苯并噻唑与苯并三氮唑复配体系对Cu的缓蚀性能

卢爽, 任正博, 谢锦印, 刘琳(

)

渤海大学化学与材料工程学院功能化合物的合成及应用辽宁省重点实验室锦州 121013

Investigation of Corrosion Inhitibion Behavior of 2-aminobenzothiazole and Benzotriazole on Copper Surface

LU Shuang, REN Zhengbo, XIE Jinyin, LIU Lin(

)

Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, China

全文: PDF(7005 KB) HTML

摘要:

采用分子自组装技术在Cu表面制备缓蚀膜。通过电化学方法分别测试2-氨基苯并噻唑 (ABT)，苯并三氮唑 (BTA) 单独存在和复配后的性能，考察了复配缓蚀剂的配比和浓度两个因素的影响。通过动力学，并结合场发射扫描电子显微镜 (SEM)、原子力显微镜 (AFM)、拉曼光谱 (RAM) 和光学接触角 (CA) 分析，探讨了缓蚀机理；通过计算协同参数S来衡量ABT和BTA协同效应的强弱。结果表明，当总浓度为20 mmol/L，各自比例占50%时，缓蚀率可达96.34%。两种缓蚀剂同时存在物理吸附 (分子间作用力) 和化学吸附 (孤对电子和金属空轨道结合形成配位化合物)，且在铜片表面形成致密且有序的保护膜。同时，经ABT-BTA组装的Cu表面的接触角较大，表面粗糙度较小；ABT比例为50%时，S=25.32，在此条件下协同作用较强。

关键词 ： Cu, 2-氨基苯并噻唑, 苯并三氮唑, 自组装膜, 协同效应, 缓蚀

Abstract：

Corrosion inhibition films of 2-aminobenzothiazole (ABT), benzotriazole (BTA) and mixtures of ABT to BTA on Cu surface were fabricated through molecular self-assembled process and then characterized by means of field emission scanning electron microscopy (SEM), atomic force microscopy (AFM), Raman spectroscopy (RAM) and optical Contact Angle (CA) measurement, while their corrosion inhibition behavior at 25 ℃ in 3.5% (mass fraction) NaCl solution was assessed. Two factors, namely the molar ratio of ABT to BTA of their mixtures and the dose of the mixture on the corrosion inhibition behavior were studied, respectively. When the dose of the inhibitors mixture was 20 mmol/L with the molar ratio was 1:1, its corrosion inhibition efficiency could reach up to 96.34%. The inhibition mechanism of ABT and BTA were acquired through kinetic analysis. Results confirmed that there exist physical absorption and chemisorption for all of them. The corrosion inhibition performance of complex films of the two inhibitors was better than that of every single inhibitor. The relevant collaborative parameters were calculated for predicting the performance of synergistic effect.

Key words： Cu 2-aminobenzothiazole benzotriazole self-assembly membrane synergistic effect corrosion inhibition

收稿日期: 2019-11-01

ZTFLH:

TG174.42

基金资助:辽宁省创新团队项目(2018-479-14);辽宁省创新团队项目(LT2015001)

通讯作者: 刘琳 E-mail: liulin@bhu.edu.cn

Corresponding author: LIU Lin E-mail: liulin@bhu.edu.cn

作者简介: 卢爽，女，1996年生，硕士生

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引用本文:

卢爽, 任正博, 谢锦印, 刘琳. 2-氨基苯并噻唑与苯并三氮唑复配体系对Cu的缓蚀性能[J]. 中国腐蚀与防护学报, 2020, 40(6): 577-584.
Shuang LU, Zhengbo REN, Jinyin XIE, Lin LIU. Investigation of Corrosion Inhitibion Behavior of 2-aminobenzothiazole and Benzotriazole on Copper Surface. Journal of Chinese Society for Corrosion and protection, 2020, 40(6): 577-584.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2019.195 或 https://www.jcscp.org/CN/Y2020/V40/I6/577

图1 ABT和BTA有机物分子结构

图2 Cu电极分别经不同浓度ABT和BTA组装后在3.5%NaCl溶液中的动电位极化曲线

表1 Cu电极分别经不同浓度ABT和BTA组装后的极化曲线拟合参数

图3 在ABT和BTA总浓度为20 mmol/L而ABT浓度不同时，Cu电极在3.5%NaCl溶液中的动电位极化曲线

表2 对图3中极化曲线拟合所得电化学参数

图4 在ABT浓度为50%时而ABT-BTA总浓度不同的自组装条件下，Cu电极在3.5%NaCl溶液中的动电位极化曲线

表3 对图4中极化曲线拟合所得电化学参数

图5 经总浓度为20 mmol/L而ABT浓度不同条件下自组装后，Cu电极在3.5%NaCl溶液中的Nyquist图

表4 对图5中阻抗谱拟合所得等效电路各元件参数

图6 经ABT浓度为50%而ABT-BTA总浓度不同条件下自组装后，Cu电极在3.5%NaCl溶液中的Nyquist图

表5 对图6中阻抗谱拟合所得等效电路各元件参数

图7 表面自组装不同缓蚀剂的Cu电极在3.5%NaCl溶液中的等效电路图

图8 不同浓度的ABT和BTA在Cu表面的Langmuir吸附等温曲线

图9 铜片分别经ABT，BTA和ABT-BTA组装后在3.5%NaCl溶液中腐蚀后的SEM像

图10 裸铜，分别经ABT，BTA和ABT-BTA 组装后于Cu表面测得的接触角

图11 铜片表面分别经BTA，ABT和ABT-BTA组装后的Raman光谱

图12 ABT，ABT-BTA和BTA组装铜表面的AFM像

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