7075 铝合金磁控溅射钛+微弧氧化复合薄膜的耐蚀性能研究

童澍, 高建国, 付小静, 万勇, 李瑞川

doi:10.16577/j.issn.1001-1560.2022.0347

材料保护 >

2022 , Vol. 55 >Issue 12: 106 - 111

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0347

工艺探讨

7075 铝合金磁控溅射钛+微弧氧化复合薄膜的耐蚀性能研究

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¹青岛理工大学机械与汽车工程学院； ²齐鲁工业大学机械工程学院； ³青岛大港海关

万勇(1968-)，博士，教授，博士研究生导师，主要研究方向为摩擦化学， E-mail:wanyong＠qlu.edu.cn

收稿日期: 2022-06-20

修回日期: 2022-07-20

录用日期: 2022-08-23

网络出版日期: 2023-12-27

基金资助

山东省自然科学基金(ZR2019MEE016)资助

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Corrosion Resistance of Magnetron Sputtered Titanium + Micro Arc Oxidizing Composite Coating on 7075 Aluminum Alloy

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(1. School of Mechanical and Automotive Engineering， Qingdao University of Technology， Qingdao 266033， China；2. School of Mechanical Engineering， Qilu University of Technology， Jinan 250353， China； 3. Qingdao Dagang Customs， Qingdao 266011， China)

Received date: 2022-06-20

Revised date: 2022-07-20

Accepted date: 2022-08-23

Online published: 2023-12-27

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摘要

针对7075 铝合金在海洋环境下耐腐蚀性能较差的问题，将磁控溅射及微弧氧化技术相结合，考察了7075 铝合金经双重处理后表面复合氧化物薄膜的微观结构及耐腐蚀性能。首先通过磁控溅射技术在铝合金表面预镀钛膜，然后通过微弧氧化技术构筑复合氧化物薄膜，通过SEM、EDS 和XRD 对复合氧化物薄膜的微观结构和相组成进行了分析；并采用电化学工作站研究复合氧化物薄膜在3.5%NaCl 溶液下的耐腐蚀性能。实验结果表明:与铝合金直接微弧氧化处理后得到的氧化物薄膜相比，表面预镀钛铝合金经微弧氧化处理后，表面上形成的复合氧化物薄膜微孔数较少，膜层的厚度增加，因而具有更好的耐蚀性能。

关键词： 铝合金; 磁控溅射; 微弧氧化; 复合氧化物薄膜; 耐蚀性

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童澍, 高建国, 付小静, 万勇, 李瑞川 . 7075 铝合金磁控溅射钛+微弧氧化复合薄膜的耐蚀性能研究[J]. 材料保护, 2022 , 55(12) : 106 -111 . DOI: 10.16577/j.issn.1001-1560.2022.0347

Abstract

In view of the poor corrosion resistance of 7075 aluminum alloy in marine environment， the microstructure and corrosion resistance of composite oxide coating on the surface of 7075 aluminum alloy obtained by combining magnetron sputtering and micro arc oxidation technologies were investigated. Firstly， the aluminum alloy surface was pre-coated with titanium film by magnetron sputtering technology， and then a composite oxide coating was prepared by micro-arc oxidation technology. The microstructure and phase composition of the composite oxide coating were analyzed by SEM， EDS and XRD. The corrosion resistance of such coating in 3.5% NaCl solution was studied by electrochemical workstation. Results showed that compared with the oxide coating obtained by a direct micro arc oxidation of aluminum alloy， the composite oxide coating formed on the Ti-coated aluminum alloy by micro arc oxidation had lower porosity and higher thickness， presenting better corrosion resistant performance.

Key words： aluminum alloy; magnetron sputtering; micro arc oxidation; composite oxide coating; corrosion resistance

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