7075铝合金微弧氧化膜硅溶胶封孔工艺及其性能

doi:10.13251/j.issn.0254-6051.2021.05.039

金属热处理 ›› 2021, Vol. 46 ›› Issue (5): 224-228.DOI: 10.13251/j.issn.0254-6051.2021.05.039

7075铝合金微弧氧化膜硅溶胶封孔工艺及其性能

李军^1,2, 姜波^1,2, 王超^1,2, 宋仁国^1,2

1.常州大学材料科学与工程学院, 江苏常州 213164;
2.常州大学江苏省材料表面科学与技术重点实验室, 江苏常州 213164

收稿日期:2020-10-19 出版日期:2021-05-25 发布日期:2021-07-21
通讯作者: 宋仁国,教授,博士,E-mail:Songrg@hotmail.com
作者简介:李军(1997—),男,硕士研究生,主要研究方向为金属腐蚀与防护,E-mail:1725223762@qq.com。
基金资助:
国家自然科学基金(51871031)

Silica sol sealing process and properties of micro-arc oxidation film on 7075 aluminum alloy

Li Jun^1,2, Jiang Bo^1,2, Wang Chao^1,2, Song Renguo^1,2

1. School of Mechanical Science and Engineering, Changzhou University, Changzhou Jiangsu 213164, China;
2. Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou Jiangsu 213164, China

Received:2020-10-19 Online:2021-05-25 Published:2021-07-21

摘要/Abstract

摘要： 对微弧氧化后的7075铝合金进行硅溶胶封孔处理,采用扫描电镜、X衍射仪、高温摩擦磨损试验机和电化学工作站对硅溶胶封孔前后微弧氧化膜层的微观表面形貌、截面形貌、相组成、耐磨性和耐腐蚀性进行观察分析,研究了硅溶胶-凝胶不同封孔工艺对封孔效果的影响。结果表明,相对于微弧氧化膜层,封孔后的微弧氧化膜层微孔明显减少,膜层的粗糙度降低,耐磨性得到提高。封孔后的铝合金微弧氧化膜腐蚀电位由-0.62 V(vs SCE)正移到-0.36 V(vs SCE),腐蚀电流密度由2.44×10^-3 A·cm^-2下降到2.03×10^-4 A·cm^-2,耐腐蚀能力得到显著提高。通过浸渍提拉法封孔的微弧氧化膜层的耐腐蚀性比旋涂法封孔的更好。

关键词: 微弧氧化膜, 封孔, 硅溶胶, 浸渍提拉法, 旋涂法

Abstract: Silica sol sealing process was carried out for the micro-arc oxidation film on 7075 aluminum alloy. The microscopic surface morphology, cross-sectional morphology, phase composition, wear resistance and corrosion resistance of the micro-arc oxide film before and after the silica sol sealing were analyzed by scanning electron microscope, X-ray diffractometer, high temperature friction and wear test machine and electrochemical workstation. And the influence of different silica sol-gel sealing processes on the sealing effect was investigated. The results show that compared with the unsealed micro-arc oxidation film, the micro-holes in the micro-arc oxidation film after sealing are obviously reduced, the roughness of the film is reduced, and the wear resistance is improved. The corrosion potential of the micro-arc oxidation film after sealing is positively shifted from -0.62 V(vs SCE) to -0.36 V(vs SCE), the corrosion current density drops from 2.44×10^-3 A·cm^-2 to 2.03×10^-4 A·cm^-2, and the corrosion resistance of the micro-arc oxidation film is significantly improved after sealing. However, the corrosion resistance of the micro-arc oxidation film sealed by the dipping and pulling method is better than that sealed by the spin coating method.

Key words: micro-arc oxidation film, sealing, silica sol, dipping and pulling method, spin coating method

中图分类号:

TG174

李军, 姜波, 王超, 宋仁国. 7075铝合金微弧氧化膜硅溶胶封孔工艺及其性能[J]. 金属热处理, 2021, 46(5): 224-228.

Li Jun, Jiang Bo, Wang Chao, Song Renguo. Silica sol sealing process and properties of micro-arc oxidation film on 7075 aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(5): 224-228.

参考文献

[1]Savonov G, Camarinha M, Rocha L O, et al. Study of the influence of the RRA thermal treatment and plasma nitriding on corrosion behavior of 7075-T6 aluminum alloy[J]. Surface and Coatings Technology, 2019, 734: 736-744.
[2]Takano N. Hydrogen diffusion and embrittlement in 7050 aluminum alloy[J]. Materials Science and Engineering: A, 2008, 483-484: 336-339.
[3]Yang Z, Wang R Q, Liu C, et al. The electrochemical corrosion behavior of plasma electrolytic oxidation coatings fabricated on aluminum in silicate electrolyte[J]. Journal of Materials Engineering and Performance, 2019, 28(2/3): 3652-3660.
[4]Kong D, Liu H, Wang J. Effects of micro arc oxidation on fatigue limits and fracture morphologies of 7475 high strength aluminum alloy[J]. Journal of Alloys and Compounds, 2015, 650: 393-398.
[5]王永钱, 江旭东, 潘春旭. 微弧氧化法原位生长TiO₂光催化薄膜及其复合技术[J]. 金属热处理, 2010, 35(3): 20-25.
Wang Yongqian, Jiang Xudong, Pan Chunxu. In-situ growth of TiO₂ photocatalytic film prepared by micro-arc oxidation and its compound technique[J]. Heat Treatment of Metals, 2010, 35(3): 20-25.
[6]翟彦博, 陈红兵, 梅镇. 封孔方式AZ31B镁合金微弧氧化膜耐腐蚀性的影响[J]. 西南大学学报(自然科学版), 2014, 36(4): 173-179.
Zhai Yanbo, Chen Hongbing, Mei Zhen. Effect ofsealing treatment on corrosion resistance of micro-arcoxidation coatings for AZ31B Mg alloy[J]. Journal of Southwest University(Natural Science), 2014, 36(4): 173-179.
[7]蔡思伟, 花天顺, 宗玙, 等. 电压对微弧氧化膜抑制7050铝合金氢脆敏感性的影响[J]. 金属热处理, 2020, 45(11): 89-94.
Cai Siwei, Hua Tianshun, Zong Yu, et al. Effect of voltage on inhibition of hydrogen embrittlement sensitivity of 7050 aluminum alloy by micro arc oxidation film[J]. Heat Treatment of Metals, 2020, 45(11): 89-94.
[8]江海洋, 孙明月, 吴铭方, 等. 7075铝合金热变形连接接头的组织与性能[J]. 金属热处理, 2020, 45(2): 46-50.
Jiang Haiyang, Sun Mingyue, Wu Mingfang, et al. Microstructure and properties of 7075 aluminum alloy hot compress bonding joint[J]. Heat Treatment of Metals, 2020, 45(2): 46-50.
[9]Wen D, Li S, Hou G, et al. Comparative study on wear behavior of plasma sprayed Al₂O₃ coatings sliding against different counterparts[J]. Ceramics International, 2017, 43(9): 6976-6986.
[10]Mohedano M, Blawert C, Zheludkevich M L. Cerium-based sealing of PEO coated AM50 magnesium alloy[J]. Surface and Coatings Technology, 2015, 269(1): 145-154.
[11]Ying X, Hu X, Song R. Characteristics of CeO₂/ZrO₂-HA composite coating on ZK60 magnesium alloy[J]. Journal of Materials Research, 2017, 32(6): 1073-1082.
[12]Shi P, Ng W F, Wong M H, et al. Improvement of corrosion resistance of pure magnesium in Hanks' solution by microarc oxidation with sol-gel TiO₂ sealing[J]. Journal of Alloys and Compounds, 2009, 469(1/2): 286-292.
[13]Sun W W, Li M Q, Gao Y, et al. Double sealing of ultrasonic micro-arc oxidation coating on pure magnesium by nano-SiO₂ particles and SiO₂ sol sealing agent[J]. Advanced Materials Research, 2014, 1030-1032: 48-51.
[14]Song R G, Dietzel W, Zhang, B J, et al. Stress corrosion cracking and hydrogen embrittlement of an Al-Zn-Mg-Cu alloy[J]. Acta Materialia, 2004, 52(16): 4727-4743.
[15]王学生, 刘侠, 包全合, 等. 铝硅复合硅氧烷封孔层的制备及耐腐蚀性能[J]. 表面技术, 2019, 48(10): 258-266.
Wang Xuesheng, Liu Xia, Bao Quanhe, et al. Preparation and corrosion performance of aluminum-silicon composite siloxane sealing layer[J]. Surface Technology, 2019, 48(10): 258-266.
[16]胡海峰, 李晓, 王连海, 等. 石墨烯添加剂对ZL109铝合金活塞微弧氧化复合膜层摩擦性能的影响[J]. 金属热处理, 2020, 45(2): 231-234.
Hu Haifeng, Li Xiao, Wang Lianhai, et al. Effect of graphene on friction properties of micro-arc oxidation films produced on ZL109 aluminum alloy piston[J]. Heat Treatment of Metals, 2020, 45(2): 231-234.
[17]Zhao J, Xie X, Zhang C. Effect of the graphene oxide additive on the corrosion resistance of the plasma electrolytic oxidation coating of the AZ31 magnesium alloy[J]. Corrosion Science, 2016, 114: 146-155.
[18]Cui X J, Ping J, Zhang Y J, et al. Structure and properties of newly designed MAO/TiN coating on AZ31BMg alloy[J]. Surface and Coatings Technology, 2017, 328: 319-325.
[19]曹楚南, 张鉴清. 电化学阻抗谱导论[M]. 北京: 科学出版社, 2009: 188-191.

7075铝合金微弧氧化膜硅溶胶封孔工艺及其性能

Silica sol sealing process and properties of micro-arc oxidation film on 7075 aluminum alloy

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