| 硅酸盐体系电解液中添加Na2WO4对LY12铝合金陶瓷膜性能的影响 |
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| 引用本文： | 何巧成,姜文勇,陈鹿,王长亮,武鹏海. 硅酸盐体系电解液中添加Na2WO4对LY12铝合金陶瓷膜性能的影响[J]. 金属热处理, 2021, 46(4): 152-156. DOI: 10.13251/j.issn.0254-6051.2021.04.027 |
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| 作者姓名： | 何巧成 姜文勇 陈鹿 王长亮 武鹏海 |
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| 作者单位： | 哈尔滨理工大学 材料科学与工程学院, 黑龙江 哈尔滨 150040 |
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| 摘 要： | 通过SEM、XRD、硬度试验、电化学腐蚀试验研究了在硅酸盐体系电解液中加入不同浓度的Na2WO4对LY12铝合金微弧氧化陶瓷膜表面形貌及性能的影响.结果表明,添加Na2WO4改变了膜层的微观结构,使微弧氧化膜层硬度增加,表面平滑,呈现出小而少的孔洞结构,且表面堆积少量形状不规则的白色质点;随着Na2WO4添加量的增加,...
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| 关 键 词： | LY12铝合金 微弧氧化 硅酸盐体系 Na2WO4 陶瓷膜层 |
| 收稿时间： | 2020-10-18 |
Influence of adding Na2WO4 to electrolyte of silicate system on properties of ceramic film on LY12 aluminum alloy |
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| He Qiaocheng,Jiang Wenyong,Chen Lu,Wang Changliang,Wu Penghai. Influence of adding Na2WO4 to electrolyte of silicate system on properties of ceramic film on LY12 aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(4): 152-156. DOI: 10.13251/j.issn.0254-6051.2021.04.027 |
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| Authors: | He Qiaocheng Jiang Wenyong Chen Lu Wang Changliang Wu Penghai |
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| Affiliation: | School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin Heilongjiang 150040, China |
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| Abstract: | Na2WO4 additive was added to the electrolyte of silicate system. The effect of concentration of Na2WO4 additive on surface morphology and properties of micro-arc oxidation ceramic film on LY12 aluminum alloy was studied by means of SEM, XRD, hardness test and electrochemical corrosion test. The results show that with the addition of Na2WO4, the microstructure of the film is changed, and the hardness of the film increases, the surface is smooth, and there are fewer small holes and a small amount of irregular white particles on the surface. With the increase of Na2WO4, the hardness of the film increases first and then decreases. When the Na2WO4 content is 4 g/L, the maximum hardness of the film is 440.3 HV0.3, which is increased by 272.3 HV0.3 compared with that of the substrate (about 168 HV0.3). XRD analysis shows that W element participates in the micro-arc oxidation process, and forms oxide WO3. The ceramic layer mainly consists of α-Al2O3, γ-Al2O3 and WO3. The electrochemical polarization curve analysis shows that addition of Na2WO4 effectively improves the corrosion resistance of the film, and the corrosion resistance is the best when the additive amount is 1 g/L, the corrosion potential is -532.0 mV and the corrosion current is 0.011 μA. The addition of Na2WO4 can effectively improve the surface morphology and properties of the ceramic film. The optimal addition amount of the Na2WO4additive is 4 g/L so as to obtain the comprehensive performance of the film. |
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| Keywords: | LY12 aluminum alloy micro-arc oxidation silicate system Na2WO4 ceramic film |
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