膜层厚度对6061铝合金黑色微弧氧化陶瓷膜层结构与性能的影响

沈文宁, 王钰雯, 李庚, 葛延峰, 胡鸣旸, 汤玉斐

doi:10.16577/j.issn.1001-1560.2024.0030

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材料保护 >

2024 , Vol. 57 >Issue 2: 28 - 34

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0030

研究篇

膜层厚度对6061铝合金黑色微弧氧化陶瓷膜层结构与性能的影响

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¹西安理工大学材料科学与工程学院； ²陕西省腐蚀与防护重点实验室

沈文宁(1985-)，博士，讲师，从事材料的腐蚀防护及防生物污损材料研发等相关研究，电话:13152075522，E-mail:shenwenning＠qq.com；

葛延峰(1985-)，博士，讲师，从事铝、镁合金的表面防护相关研究，电话:13186086877，E-mail:geyanfeng＠xaut.edu.cn

收稿日期: 2023-05-04

修回日期: 2023-06-02

录用日期: 2023-07-02

网络出版日期: 2024-03-08

基金资助

陕西省自然科学基础研究计划面上项目(2022JM-294)；陕西省教育厅重点实验室项目(18JS079)资助

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Effects of Coating Thickness on the Microstructure and Properties of Black Micro-Arc Oxidation Ceramic Coating on 6061 Aluminum Alloy

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(1.School of Materials Science and Engineering， Xi’an University of Technology， Xi’an 710048， China；2.Key Laboratory of Corrosion and Protection of Shaanxi Province， Xi’an 710048， China)

SHEN Wenning (1985-)， Ph.D.， Lecture， Research Focus: Corrosion Protection of Materials and Development of Anti-Biofouling Materials， Tel.: 13152075522， E-mail: shenwenning＠qq.com；

GE Yanfeng (1985-)， Ph.D.， Lecture， Research Focus: Surface Protection of Aluminum and Magnesium Alloys， Tel.: 13186086877，E-mail:geyanfeng＠xaut.edu.cn

Received date: 2023-05-04

Revised date: 2023-06-02

Accepted date: 2023-07-02

Online published: 2024-03-08

Supported by

Natural Science Basic Research Plan in Shaanxi Province of China (2022JM-294)； Scientific Research Program Funded by Shaanxi Provincial Education Department (18JS079)

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摘要

为了明确膜层厚度对铝合金黑色微弧氧化陶瓷膜层的黑度、耐蚀性和硬度的影响规律，促进其实际应用，在硅酸盐-钒酸盐复合溶液体系中对6061 铝合金进行微弧氧化处理，通过控制微弧氧化时间获得具有不同膜层厚度的铝合金黑色陶瓷膜层。利用测厚仪、粗糙度测量仪、SEM 和EDS 对黑色陶瓷膜层的表面结构、膜层成分和粗糙度等进行表征，并借助色差仪、维氏硬度计和电化学工作站等研究了膜层厚度对陶瓷膜层的黑度、显微硬度和耐蚀性的影响。结果表明:膜层厚度对黑色陶瓷膜层的表面形貌、粗糙度、显色特性、硬度和耐蚀性有较大影响。随着微弧氧化时间延长，膜层厚度增加，膜层表面更为粗糙，表层放电微孔数量减少，放电微孔孔径增大；当膜厚达到30.786 μm 时，陶瓷膜层的放电微孔显著增大，孔径达到10 μm。随着膜层厚度增加，陶瓷膜层的黑度增加，显微硬度提高，但耐蚀性先增强后降低。当膜层厚度为20.781 μm 时，陶瓷膜层的黑度和硬度较高，耐蚀性最好，其在3.5%NaCl 溶液中的自腐蚀电流密度为1.093×10-6 A/cm2。

关键词： 6061 铝合金; 黑色陶瓷膜层; 膜层厚度; 耐蚀性; 微弧氧化

本文引用格式

沈文宁, 王钰雯, 李庚, 葛延峰, 胡鸣旸, 汤玉斐 . 膜层厚度对6061铝合金黑色微弧氧化陶瓷膜层结构与性能的影响[J]. 材料保护, 2024 , 57(2) : 28 -34 . DOI: 10.16577/j.issn.1001-1560.2024.0030

Abstract

In order to reveal the influence law of coating thickness on the blackness， corrosion resistance and hardness of black micro-arc oxidation coatings on aluminum alloy for promoting their practical application，6061 aluminum alloy was treated by micro-arc oxidation in silicatevanadate composite solution systems，and black ceramics coatings with different coating thickness on aluminum alloy were obtained through controlling micro-arc oxidation time.The surface structure， composition and roughness of the black ceramic coatings were characterized by thickness gauge， roughometer， SEM and EDS.Moreover， the effects of coating thickness on the blackness， microhardness and corrosion resistance of the black ceramic coatings were studied by using colorimeter， Vickers hardness tester and electro-chemistry workstation.Results showed that the coating thickness had great influence on the surface morphology， roughness， color features， microhardness and corrosion resistance.As the micro-arc oxidation time increased， the thickness of coatings increased， the surface of the coating became rougher， the number of discharge micropores on the surface declined， and the diameter of the discharge micropores increased.When the thickness increased to 30.786 μm， the size of discharge micropores increased significantly， reaching 10 μm.As the coating thickness increased， the blackness and microhardness of ceramic coatings improved， while the corrosion resistance increased firstly and then decreased.When the thickness reached 20.781 μm， the ceramic coating had higher microhardness and blackness， and showed the best corrosion resistance， with the self-corrosion current density of 1.093×10-6 A/cm2 in 3.5%(mass fraction) NaCl solution.

Key words： 6061 aluminum alloy; black ceramic coating; coating thickness; corrosion resistance; micro-arc oxidation

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ISSN 1001-1560　CN 42-1215/TB
主管部门：中国机械工业联合会
主办单位：武汉材料保护研究所有限公司
编辑出版：《材料保护》编辑部

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