摘要
以Al-Si合金为基体材料,通过调整盐酸刻蚀时间(0 min、15 min、20 min、25 min、30 min和35 min)及硬脂酸浸泡时间(10 h、12 h、14 h和16 h)对该合金进行表面处理。通过扫描电子显微镜(SEM)、接触角测量仪、电化学工作站等分别对样品的表面形貌、表面润湿性、耐腐蚀性能等进行检测。结果表明:随着酸刻蚀时间的增加,Al-Si合金与水的接触角呈先增加后减小的趋势,在30 min时达到最高126.87°,较未处理合金的接触角提高了157%。此时合金表面出现了微纳米珊瑚状的凸凹结构;随着浸泡时间的增加,接触角呈现相同的变化趋势,浸泡时间为14 h时,接触角达到最高为149.32°。所得样品的自腐蚀电位提高了66.7%,而腐蚀电流密度降低了一个数量级,耐腐蚀性能显著增强。
With Al-Si alloy as the base material,its surfaces were treated by adjusting etching time of hydrochloric acid(0,15,20,25,30 and 35 min)and soaking time of stearic acid(10,12,14 and 16 h).The surface topography,surface wettability and corrosion resistance of the samples were tested separately by scanning electron microscope(SEM),contact angle meter and electrochemical workstation.The results showed that with the increase of etching time,the contact angle of Al-Si alloy and water first increased and then decreased.When the etching time was 30 min,the contact angle reached the maximum of 126.87°,which was 157%higher than that of the untreated alloy.The alloy surface had a coralline-like micro/nano-structure at this time.With the increase of soaking time,the contact angle also exhibited the same changing trend.When the soaking time was 14 h,the contact angle reached the maximum of 149.32°.The self-corrosion potential of the obtained sample increased by 66.7%,while its corrosion current density was one order of magnitude lower,and its corrosion resistance performance was obviously improved.
作者
代卫丽
刘晨
李佳郁
宋月红
刘彦峰
韩茜
张美丽
Dai Weili;Liu Chen;Li Jiayu;Song Yuehong;Liu Yanfeng;Han Xi;Zhang Meili(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
《轻金属》
北大核心
2022年第12期32-37,共6页
Light Metals
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)
商洛市科技研发计划一般项目(2020-Z-0079)
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
AL-SI合金
酸刻蚀
接触角
疏水
耐腐蚀
Al-Si alloy
acid etching
contact angle
hydrophobic
corrosion resistance
