摘要
采用溶胶-凝胶法,以硅烷偶联剂(KH560)和正硅酸乙酯(TEOS)为前驱体,用浸渍-提拉法,在AZ31镁合金表面成功制备出一层厚度均匀的有机/无机杂化涂层。通过改变溶胶-凝胶体系中的有机前驱体(有机硅烷KH560和正硅酸乙酯)相对比例,研究了不同前驱体比例对AZ31镁合金表面有机/无机杂化涂层的耐蚀性和耐磨性的影响。采用扫描电子显微镜、扫描探针显微镜、电化学分析仪、光学显微镜、涂镀层测厚仪等仪器,对涂层的表面形貌、耐蚀性、附着力及厚度进行测试。结果表明:随着KH560与TEOS比值的增大,涂层的平整度、厚度、耐蚀性以及附着力先增大后减小。当KH560∶TEOS=3时,能获得平整度较高、缺陷较少并有良好附着力、韧性以及耐蚀效果好的涂层。
In this paper,a uniform organic/inorganic hybrid coating was successfully prepared on the surface of AZ31 magnesium alloy by sol-gel method,using silane coupling agent(KH560)and tetraethyl orthosilicate(TEOS)as precursors.By changing the relative ratios of organic precursors(organosilane KH560 and tetraethyl orthosilicate)in sol-gel system,the effects of different precursor ratios on the corrosion resistance and wear resistance of organic/inorganic hybrid coatings on AZ31 magnesium alloy were studied.The surface morphology,corrosion resistance,adhesion and thickness of the coating were tested by scanning electron microscope,scanning probe microscope,electrochemical workstation,optical microscope and coating thickness gauge.The results show that the flatness,thickness,corrosion resistance and adhesion of the coating first increase and then decrease with the increase of the ratio of KH560 to TEOS.When KH560:TEOS=3,the coating with higher flatness,less defects,good adhesion,toughness and corrosion resistance can be obtained.
作者
任权友
杨友坤
侯香龙
曹献龙
曹鹏军
邓洪达
余大亮
兰伟
REN Quan-you;YANG You-kun;HOU Xiang-long;CAP Xian-long;CAO Peng-jun;DENG Hong-da;YU Da-liang;LAN Wei(School of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)
出处
《材料保护》
CAS
CSCD
北大核心
2020年第S01期14-20,共7页
Materials Protection
基金
重庆市自然科学基金面上项目(cstc2019jcyj-msxmX0188)
重庆市技术创新与应用资助项目(cstc2019jscx-msxm1566)
重庆高校优秀成果转化项目(KJZH17136)
重庆科技学院研究生科技创新项目(YKJCX1920218)资助
关键词
镁合金
有机前驱体
溶胶-凝胶法
耐蚀性
magnesium alloys
organic precursors
sol-gel method
corrosion resistance
