CUI Linlin,ZHUANG Xiangshi,CHEN Yabing.Effect of Current Density on Properties of Citric Acid Anodic Oxide Films on 6463 Aluminum Alloy Used for Construction[J].Plating & Finishing,2021,(8):1-5.[doi:10.3969/j.issn.1001-3849.2021.08.001]
电流密度对建筑用6463铝合金柠檬酸阳极氧化膜性能的影响
- Title:
- Effect of Current Density on Properties of Citric Acid Anodic Oxide Films on 6463 Aluminum Alloy Used for Construction
- 文献标志码:
- A
- 摘要:
- 在建筑用6463铝合金表面制备柠檬酸阳极氧化膜，并研究电流密度对阳极氧化膜的微观形貌、显微硬度和耐蚀性能的影响。结果表明：不同电流密度下获得的四种阳极氧化膜均呈现蜂窝状形貌，但性能存在一定差异。在一定范围内随着电流密度增加，阳极氧化膜的厚度呈现近似线性增加的趋势，孔隙率降低，致密性明显改善，显微硬度从125.4 HV增大到238.2 HV。但电流密度超过一定限度，阳极氧化膜的孔隙率升高，致密性变差，显微硬度减小到182.4 HV，耐腐蚀性能下降。电流密度为1.8 A/dm2时获得的阳极氧化膜厚度接近12 μm，孔隙率为10.5%，该阳极氧化膜抵抗局部塑性变形的能力以及抑制腐蚀和阻挡腐蚀介质扩散的能力较强，因此表现出良好的性能。
- Abstract:
- Citric acid anodic oxide films were prepared on the surface of 6463 aluminum alloy used in construction, and the effect of current density on the microstructure, microhardness and corrosion resistance of anodic oxide films was studied. The results showed that four anodic oxide films obtained at different current density all presented honeycomb morphology, but there were some differences in performance. With the increase of current density in a certain range, the thickness of anodic oxide film increased linearly, the porosity decreased and the compactness improved obviously, the microhardness increased from 125.4 HV to 238.2 HV. However, when the current density exceeded a certain limit, the porosity of anodic oxide film increased, the microhardness decreased to 182.4 HV and the corrosion resistance decreased. The anodic oxide film obtained at 1.8 A/dm2 with a thickness of 12 μm and porosity of 10.5%, and exhibited good performance because of its strong ability to resist local plastic deformation and inhibit corrosion and prevent the diffusion of corrosive medium.
参考文献/References:
[1] 冯驰,黄运华,申玉芳,等. 不同表面状态对6061铝合金耐蚀性能的影响研究[J]. 装备环境工程, 2015, 4, 100-104.
Feng C, Huang Y H, Shen Y F, et al. Effect of surface status on the corrosion resistance of 6061 aluminum alloy[J]. Equipment Environmental Engineering, 2015, 4, 100-104 (in Chinese).
[2] 刘振云. 铝合金组织结构对其耐蚀性能影响的研究[D]. 北京:北方工业大学,2016.
[3] Asoh H, Matusumoto M, Hashimoto H. Effects of ethanol on the efficiency of the formation of anodic alumina in sulfuric acid[J]. Surface and Coatings Technology, 2019, 378, 124947.
[4] 王桂香,郭旖旎,王晓龙,等. 草酸-硼酸电解液中铝合金阳极氧化的研究[J]. 电镀与环保,2012,32(6): 33-35.
Wang G X, Guo Y N, Wang X L, et al. A research on anodization of aluminum alloy in oxalic acid-boric acid electrolyte[J]. Electroplating & Pollution Control, 2012, 32(6): 33-35 (in Chinese).
[5] 王建锋,陈香香. 汽车用6061铝合金柠檬酸阳极氧化工艺的研究[J]. 电镀与环保,2017,37(4):44-46.
Wang J F, Chen X X. Research on citric acid anodic oxidation technology of 6061 aluminum alloy for automobile[J]. Electroplating & Pollution Control, 2017, 37(4): 44-46 (in Chinese).
[6] 张新宇,唐聿明,赵旭辉,等. 硬脂酸添加剂对AZ91D镁合金阳极阳极氧化膜耐蚀性的影响[J]. 表面 技术,2020,49(2):220-226.
Zhang X Y, Tang Y M, Zhao X H, et al. Effect of stearic acid additive on corrosion resistance of anodized film on AZ91D magnesium alloy[J]. Surface Technology, 2020, 49(2): 220-226 (in Chinese).
[7] 陈健,陈玉鑫,黄涛,等. 不同铬含量耐候钢在高湿热模拟环境中的耐腐蚀性能[J]. 机械工程材料, 2019,43(4):53-58.
Chen J, Chen Y X, Huang T, et al. Corrosion resistance of weathering steels with different Cr content in simulated high temperature and humidity environment[J]. Materials for Mechanical Engineering, 2019, 43(4): 53-58 (in Chinese).
[8] Liu J A, Li S H, Han Z W, et al. Improved corrosion resistance of friction stir welded magnesium alloy with micro-arc oxidation/electroless plating duplex coating [J]. Materials Chemistry and Physics, 2021, 257, 123753.
备注/Memo
收稿日期： 2021-02-15；修回日期： 2021-03-29
作者简介： 崔琳琳（1986－），女，硕士，讲师，主要研究方向：建筑材料、表面工程等，Email：cui_067000@163.com
基金项目： 河北省科学技术委员会