摘要
采用锌系磷化工艺结合溶胶—凝胶法,先在镁合金基体表面制备一层锌系磷化膜,然后通过涂覆改性SiO2溶胶固化后获得出超疏水复合膜层。采用扫描电镜、能谱仪、接触角测量仪、电化学工作站并通过对比实验,对复合镀层的表面形貌、成分、润湿性能、自清洁性能和耐腐蚀性能进行测试分析。结果表明:复合镀层表面表面形成微纳米结构呈现超疏水状态,静态接触角达到151.67°,主要成分为Zn、P、O、Si和C元素。复合膜层具有良好的自清洁性能及抗酸碱腐蚀能力,其电荷转移电阻和膜层电阻相比于镁合金基体分别提高约4.6倍和3.2倍,对镁合金基体的保护效率为82.1%,能有效抑制镁合金基体腐蚀同时保护其免受污染。
A zinc phosphating film was prepared on magnesium alloy substrate,and then a super-hydro‐phobic composite film was obtained through coating modified SiO2 sol after curing using zinc phosphat‐ing process combined with sol-gel method.The surface morphology,components,wettability perfor‐mance,self-cleaning performance and corrosion resistance of the composite coating were tested and an‐alyzed by scanning electron microscope,energy dispersive spectrometer,contact angle measuring in‐strument,electrochemical workstation and through comparative experiments.The results show that the composite coating is in superhydrophobic state with micro-nano structure,the static contact angle reach‐es 151.67°,and the main components are Zn,P,O,Si and C elements.The composite film has good self-cleaning performance and acid and alkali corrosion resistance,its charge transfer resistance and film resistance are increased by about 4.6 times and 3.2 times respectively compared with magnesium al‐loy substrate,and the protection efficiency for magnesium alloy substrate is 82.1%.The composite film can effectively inhibit the corrosion of magnesium alloy substrate and protect it from pollution.
作者
袁英
YUAN Ying(School of Intelligent Manufacturing and Energy Engineering,Jiangxi University of Engineering,Xinyu 338000,China)
出处
《电镀与精饰》
CAS
北大核心
2022年第8期38-43,共6页
Plating & Finishing
基金
江西省教育厅科技项目(GJJ202910)。
关键词
超疏水复合膜层
镁合金
润湿性能
自清洁性能
耐腐蚀性能
superhydrophobic composite film
magnesium alloy
wettability performance
self-clean‐ing performance
corrosion resistance
