一种兼具装饰性和耐蚀性的镁合金红色微弧氧化膜层的制备
Preparation of red micro-arc oxidation coating with good decorative effect and anticorrosive performance on magnesium alloy
马焕祥 1林国峰 1徐曦东 1王苗 2王文博2
作者信息
- 1. 宁波旭升集团股份有限公司,浙江 宁波 315806
- 2. 北京航空航天大学宁波创新研究院,浙江 宁波 315800
- 折叠
摘要
[目的]镁合金微弧氧化在装饰性方面的研究报道不多.[方法]采用微弧氧化技术在ZM5镁合金表面制备了红色的微弧氧化陶瓷层,研究了主盐Na2SiO3和着色剂CuSO4的质量浓度,配位剂的种类,以及氧化时间对膜层的影响.[结果]在含有Na2SiO320.0 g/L、CuSO40.5 g/L、乙二胺四乙酸二钠0.5 g/L和NaF 0.5 g/L的电解液中,以电流密度3.5 A/dm2氧化25 min,能够获得厚度约为31.4 μm的红色微弧氧化膜.该膜层致密,主要由MgO、Mg2SiO4和CuO组成,在铜加速乙酸盐雾试验中出现锈蚀的时间为 48 h.[结论]ZM5 镁合金表面红色微弧氧化膜的耐腐蚀性能比在不加CuSO4 时所得白色微弧氧化膜更好.
Abstract
[Introduction]There are few reports on the decorative effect of micro-arc oxidation for magnesium alloys.[Method]A red ceramic film was prepared on the surface of ZM5 magnesium alloy by micro-arc oxidation.The effects of the mass concentrations of Na2SiO3 as main salt and CuSO4 as coloring agent,different complexing agents,and oxidation duration on the properties of micro-arc oxidation film were studied.[Result]The composition of micro-arc oxidation electrolyte was optimized as follows:Na2SiO320 g/L,CuSO40.5 g/L,disodium ethylenediaminetetraacetate 0.5 g/L,and NaF 0.5 g/L.The red ceramic film obtained by micro-arc oxidation at a current density of 3.5 A/dm2 for 25 min is compact,about 31.4 μm thick,mainly composed of MgO,Mg2SiO4,and CuO,and durable in copper-accelerated acetic acid salt spray test for 48 hours.[Conclusion]The red micro-arc oxidation film on ZM5 magnesium alloy has better corrosion resistance than the white one prepared in the CuSO4-free electrolyte.
关键词
镁合金/微弧氧化/红色/硫酸铜/耐蚀性Key words
magnesium alloy/micro-arc oxidation/red/copper sulfate/corrosion resistance引用本文复制引用
基金项目
宁波市北仑区关键核心技术攻关项目(2021BLG004)
出版年
2024
NETL
NSTL
万方数据