恒流恒压交互作用对6063铝合金微弧氧化陶瓷膜层组织与性能的影响

葛晗, 姜波, 王超, 宋仁国

doi:10.16577/j.issn.1001-1560.2022.0222

材料保护 >

2022 , Vol. 55 >Issue 8: 102 - 108

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0222

工艺探讨

恒流恒压交互作用对6063铝合金微弧氧化陶瓷膜层组织与性能的影响

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(常州大学 a. 材料科学与工程学院，b. 江苏省材料表面科学与技术重点实验室，江苏常州 213164)

宋仁国(1965-)，教授，博士生导师，博士，主要研究方向为材料腐蚀与防护、表面工程、计算材料科学等，电话：0519-86330095，E - mail: songrg@cczu.edu.cn

收稿日期: 2022-02-19

修回日期: 2022-03-29

录用日期: 2022-04-25

网络出版日期: 2023-12-17

基金资助

国家自然科学基金资助项目(51871031)

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Effects of Constant Current and Constant Voltage Interaction on the Microstructure and Properties of Micro - Arc Oxidation Ceramic Coatings Formed on 6063 Aluminum Alloy

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(a.School of Materials Science and Engineering, b. Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China)

Received date: 2022-02-19

Revised date: 2022-03-29

Accepted date: 2022-04-25

Online published: 2023-12-17

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摘要

为了研究不同微弧氧化模式对6063铝合金微弧氧化陶瓷膜层性能的影响，选取恒压、恒流、先恒流再恒压、先恒压再恒流4种微弧氧化模式制备陶瓷膜层，采用扫描电镜(SEM)、X射线衍射仪(XRD)、摩擦磨损试验机、电化学工作站等仪器测试表征了陶瓷膜层的显微组织与性能。结果表明：4种微弧氧化模式制得的陶瓷膜层中，先恒流再恒压模式下制得的微弧氧化陶瓷膜层的致密性最好，厚度为14 μm，摩擦系数最小，为1.1左右，腐蚀电压Ecorr由基材的-0.63 V正移至-0.46 V，腐蚀电流密度Jcorr由基材的4.83×10-5 A/cm2降低为1.40×10-6 A/cm2，其耐蚀性与耐磨性最好。

关键词： 6063铝合金; 微弧氧化; 恒流恒压交互; 组织; 性能

本文引用格式

葛晗, 姜波, 王超, 宋仁国 . 恒流恒压交互作用对6063铝合金微弧氧化陶瓷膜层组织与性能的影响[J]. 材料保护, 2022 , 55(8) : 102 -108 . DOI: 10.16577/j.issn.1001-1560.2022.0222

Abstract

In order to study the effect of different micro - arc oxidation (MAO) modes on the properties of MAO ceramic coatings on 6063 aluminum alloy, four micro - arc oxidation modes (constant voltage, constant current, constant current first and then constant voltage, constant voltage first and then constant current) were selected to prepare MAO ceramic coatings. Scanning electron microscopy (SEM), X - ray diffractometer (XRD), friction and wear testing machine and electrochemical workstation were used to characterize the microstructure and properties of the coatings. Results showed that among the ceramic coatings prepared under the above - mentioned four micro - arc oxidation modes, the coating prepared under the constant current first and then constant voltage mode had the best densification with a thickness of 14 μm. In addition, the friction coefficient was about 1.1, which was the smallest. The corrosion voltage (Ecorr) moved positively from -0.63 V (the substrate’s Ecorr) to - 0.46 V, and the corrosion current density (Jcorr) decreased from the 4.83×10-5 A/cm2 (the substrate’s Jcorr) to 1.40×10-6 A/cm2. Thus, this MAO coating possessed the optimal corrosion resistance and wear resistance.

Key words： 6063 aluminum alloy; micro - arc oxidation; constant current and constant voltage interaction; microstructure; property

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