摘要
通过化学刻蚀,以硬脂酸为修饰剂,成功实现AM60镁合金表面的超疏水改性,并采用扫描电镜、接触角仪、电化学工作站等对处理前后的AM60镁合金表面的微观形貌、疏水性能和耐腐蚀性能进行分析。结果表明:AM60镁合金仅经盐酸刻蚀处理后,表现为超亲水性,再经硬脂酸浸泡后才达到疏水的效果;随着硬脂酸浸泡时间的增加,该合金的表面接触角呈现先增加后减小的趋势,在浸泡12 h时,接触角最大为150.18°,滚动角小于10°,此时合金表面具有超疏水性能;同时,相比于未处理的AM60镁合金而言,超疏水改性后样品的腐蚀电流密度降低了88.19%,腐蚀电压提高了19.72%,耐腐蚀性能得到明显改善;而且,超疏水改性还可提高合金对粉尘和水溶液的自清洁性能。
The hydrophobic surface film on AM60 Mg-alloy was prepared by chemical etching, and then soaking in stearic acid ethanol solution. The microstructure, hydrophobic properties and corrosion resistance of hydrophobic surface were characterized by means of scanning electron microscope, contact angle tester and electrochemical workstation. The results showed that the AM60 Mg-alloy was super hydrophilic after etching with hydrochloric acid. When the etching time was 25 min, the contact angle reached a maximum value, which was 125% higher than that of the untreated surface. With the increase of soaking time in the stearic acid ethanol solution, the contact angle increases first and then decreases.When soaked for 12 h, the contact angle reaches the maximum of 150.18° and the rolling angle is less than 10°. At this time, the hydrophobic film presents a micro/nano rough surface with low-surface energy,which have superior hydrophobic properties. The hydrophobic AM60 Mg-alloy has good corrosion resistance, and its corrosion current density is 88.19% lower than that of untreated matrix material, and the corresponding corrosion voltage is 19.72% higher, which significantly improves the corrosion resistance of the AM60 Mg-alloy. At the same time, the treated AM60 Mg-alloy has also good self-cleaning performance to dust and aqueous solution.
作者
代卫丽
王景行
罗帅
杜宁
刘凡
胥立栋
张俊
宋月红
刘彦峰
DAI Weili;WANG Jinghang;LUO Shuai;DU Ning;LIU Fan;XU Lidong;ZHANG Jun;SONG Yuehong;LIU Yanfeng(Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,China;Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo University,Shangluo 726000,China;School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China)
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2022年第2期301-308,共8页
Journal of Chinese Society For Corrosion and Protection
基金
陕西省自然科学基础研究计划(2019JQ-156)
陕西省教育厅重点科研计划(19JS026)
商洛市高性能有色金属制备与加工技术创新团队(SK2019-75)
商洛学院博士科研项目(17SKY019)。
关键词
AM60镁合金
化学刻蚀
疏水性
耐蚀性
自清洁
AM60 Mg-alloy
chemical etching
super-hydrophobic
corrosion resistance
self-cleaning
