光响应型钛基纳米薄膜的制备及防腐性能研究  

Preparation and anti-corrosion properties of photoresponsive titanium based nano-films

作　　者：李文靓 彭穗[1,2] 辛亚男 唐敏 Li Wenjing;Peng Sui;Xin Yanan;Tang Min(Pangang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China;Chengdu Advanced Metal Materials Industry Technology Research Institute Co.,Ltd.,Chengdu 610300,Sichuan,China)

机构地区：[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]成都先进金属材料产业技术研究院股份有限公司,四川成都610300

出　　处：《钢铁钒钛》2021年第6期120-132,共13页Iron Steel Vanadium Titanium

摘　　要：基于企业生产研究背景与优势,提出利用廉价且易得的钛源(例如:TiOSO4)材料为原料,采用反应简单、操作便捷的sol-gel法在基材表面制备一层或多层纳米级钛基薄膜,研究镀膜后基材在紫外光光照和暗态条件下的耐腐蚀能力,意图通过镀膜大幅度提高基材的耐腐蚀能力。通过选择钛源、沉淀剂、水溶胶的钛浓度、络合剂比例和反应温度优化水溶胶制备工艺;同时研究不同浓度水溶胶的粘温特性及采用水溶胶浓缩为干凝胶的方法对水溶胶中颗粒粒径和形貌进行观测,溶胶粒径均小于50 nm。后期采用匀速提拉法在基板表面进行不同层数薄膜的制备,采用相应热处理得到纳米钛基薄膜,并研究纳米薄膜的形貌。最后将基片制作成电极浸渍在3.5%氯化钠溶液中测试其防腐性能,制备纳米薄膜表面颗粒粒径均小于50 nm,五层膜厚度在1μm左右。防腐性能测试结果表明在基材表面制备防腐薄膜提高了基材腐蚀电位、降低其腐蚀电流,在暗态条件下,相较基板的防护效率最高可达99.73%;在紫外光照下,相较基板的防护效率最高可达99.14%。同时通过暗态和紫外光照下的基板的开路电位分析,在紫外光照射下相对于暗态下的开路电位出现不同程度负移的情况,展现出薄膜具有光响应性。Based on the research background and advantages of enterprise production,cheap and easily available titanium sources(such as TiOSO4)were used as raw materials to prepare one or more nano-titanium-based films on the substrate surface by sol-gel method with simple reaction and convenient operation.The corrosion resistance of substrate after coating was studied under ultraviolet light and dark state conditions,with the intention of greatly improving the corrosion resistance of the substrate through the coating.The preparation process of hydrosol was optimized by selecting titanium source,precipitant,titanium concentration of hydrosol,proportion of complexing agent and reaction temperature.At the same time,the viscosity and temperature characteristics of hydrosol at different concentrations were studied,and the size and morphology of the particles were observed by the sol-gel method.The particle size of the sol was less than 50 nm.In the later stage,the films with different layers were prepared on the substrate surface by uniform pulling method,the nano titanium based films were obtained by corresponding heat treatment,and the morphology of the nano films was studied.Finally,the substrate was made into an electrode and immersed in a 3.5%sodium chloride solution to test its anti-corrosion performance.The particle size on the surface of the nano-film was less than 50 nm,and the thickness of the five layers of film was 1μm.The results show that the corrosion resistance of the substrate can be improved by anti-corrosive film on the substrate surface.The protection efficiency is up to 99.73%and 99.14%respectively in dark state and under ultraviolet light,compared with that of the substrate.Meanwhile,through the analysis of the open circuit potential of the substrate under dark state and ultraviolet light,the negative shift of the open circuit potential of the substrate under ultraviolet light is different from that of the dark state,which shows the light response of the film.

关 键 词：纳米钛基薄膜 SOL-GEL法 硫酸氧钛 钛基水溶胶 防腐性能 光响应性 

分 类 号：TF823[冶金工程—有色金属冶金] TG174[金属学及工艺—金属表面处理]