植酸和唑类衍生物复合转化膜的制备及其机理研究

杨忠钰, 卞 达, 赵永武

doi:10.16577/j.issn.1001-1560.2023.0170

材料保护 >

2023 , Vol. 56 >Issue 7: 119 - 126

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0170

工艺探讨

植酸和唑类衍生物复合转化膜的制备及其机理研究

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江南大学机械学院，江苏无锡 214122

卞达(1990-)，副教授，博士，研究方向为表面工程，E-mail: biand＠jiangnan.edu.cn

收稿日期: 2023-01-25

修回日期: 2023-02-10

录用日期: 2023-03-15

网络出版日期: 2023-08-23

基金资助

国家自然科学基金(51675232)；江苏省自然科学基金(BK20190611)资助

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Preparation and Mechanism Study of Phytic Acid and Azole Derivatives Composite Conversion Film

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School of Mechanical Engineering，Jiangnan University，Wuxi 214122，China

Received date: 2023-01-25

Revised date: 2023-02-10

Accepted date: 2023-03-15

Online published: 2023-08-23

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摘要

为改善植酸单独使用时难以在铜表面形成完整且致密转化膜的问题，采用浸渍法在铜表面制备含植酸(PA)和不同唑类衍生物的转化膜，利用接触角测试仪、电化学工作站、扫描电子显微镜(SEM)、能谱分析(EDS)表征了转化膜的疏水性、耐腐蚀性、表面形貌及成分，使用X 射线电子能谱仪(XPS)对耐蚀性能最佳的PA+BTA 转化膜的成膜机理进行分析。结果表明:加入不同唑类衍生物所形成的转化膜的耐腐蚀性提高，其中加入苯并三氮唑(BTA)和植酸的转化膜的接触角达到最大值(135.51°)，腐蚀电流密度达到最小值(2.050×10-7 A/cm2)，阻抗值超过90 kΩ；观察PA+BTA 转化膜的SEM 形貌发现，该转化膜在铜基底表面分布均匀且致密；对PA+BTA 转化膜进行XPS 谱分析，发现PA 和BTA 均参与了转化膜的形成，在铜基底表面生成了PA-Cu 和BTA-Cu 配合物，能有效保护铜基底。

关键词： 植酸; 苯并三氮唑; 转化膜; 腐蚀性能; 铜基底

本文引用格式

杨忠钰, 卞达, 赵永武 . 植酸和唑类衍生物复合转化膜的制备及其机理研究[J]. 材料保护, 2023 , 56(7) : 119 -126 . DOI: 10.16577/j.issn.1001-1560.2023.0170

Abstract

To improve the problem of difficulty in forming a complete and dense conversion film on the copper surface when using phytic acid alone，the conversion films containing phytic acid (PA) and different azole derivatives were prepared on copper surface by impregnation method.The hydrophobicity，corrosion resistance and surface morphology of the conversion films were characterized by contact angle tester，electrochemical workstation，scanning electron microscope and energy dispersive spectroscopy (EDS).The film formation mechanism of PA+BTA conversion film with the best corrosion resistance was analyzed using X-ray electron spectroscopy (XPS).Results showed that the corrosion resistance of conversion films formed by adding different azole derivatives was improved.The contact angle of the conversion film with benzotriazole (BTA) and phytic acid reached maximum value (135.51 °)，and the corrosion current density reached minimum value (2.050 × 10-7 A/cm2)，while the impedance value exceeding 90 kΩ.By observing the SEM morphology of PA+BTA conversion film，it was found that the conversion film was evenly distributed and dense on the surface of copper substrate.XPS analysis of the PA+BTA conversion film showed that both PA and BTA were involved in the formation of the conversion film.PA-Cu and BTA-Cu complexes were formed on the surface of copper substrate，which could effectively protect the substrate.

Key words： phytic acid; benzotriazole; conversion film; corrosion performance; Cu substrate

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