自润滑及高导电型无铬耐指纹复合转化膜的制备与性能  

Preparation and Performance of Self- Lubricating and High Conduction Type Chromium- Free Fingerprint Resistant Composite Conversion Films

作　　者：杨兴亮[1] 汤晓东[1,2] 汪亚楠[2] 赵云龙[1] 张千峰[2] 

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000 [2]安徽工业大学分子工程与应用化学研究所,安徽马鞍山243002

出　　处：《材料保护》2016年第3期47-51,8,共5页Materials Protection

基　　金：科技部863计划新材料研究专题项目(2009AA03Z529)资助

摘　　要：为了制得一种高导电型无铬自润滑耐指纹复合转化膜,以阳离子型丙烯酸树脂作为主成膜物质,复合硅烷偶联剂、聚乙烯醇(PVA)等辅助成膜物,向其中添加自制的无机缓蚀剂、改性纳米Si O2、水性蜡以及导电聚苯胺高分子,在镀锌板表面制得了复合转化膜。红外分析表明化学氧化合成法制备的聚苯胺醌式结构明显,为本征态形式;层间及表面电阻测试显示,本征态聚苯胺的加入对膜层导电性提高明显;色差及抗摩擦测试表明改性纳米Si O2及水性蜡提高了膜层耐指纹及自润滑性;盐水浸泡、表面微观形貌(SEM)、起伏形貌(AFM)等测试表明,经盐水浸泡后膜层表面破坏较小,对腐蚀介质具有较好的抵抗能力。烘烤固化过程有机质之间发生脱水缩合,树脂、硅烷以及改性纳米Si O2等发生交联积聚现象,虽使复合耐指纹转化膜表面粗糙度增加,但其交联度及致密性均有所提高,膜层抗腐蚀性能增强。In this work,the cationic acrylic resin was used as main film-forming material,and silane coupling agents and polyvinyl alcohol(PVA) were compounded as auxiliary film- forming substances.Besides,the self-made inorganic corrosion inhibitor,modified nano- SiO_2,water wax and conductive polyaniline polymer were added as the fillers to prepare composite conversion films on the galvanized plates.Results showed that the polyaniline quinone structure was observed as the eigen- state form by the infrared spectroscopy analysis.The inter- layer and surface resistance testing showed that addition of the intrinsic polyaniline increased the film conductivity significantly.The color and anti- friction testing showed that the addition of the modified nano- SiO_2 and water wax improved the film fingerprint resistance and self-lubrication ability.The brine immersion,surface microstructure(SEM),undulating surface morphology(AFM) and other tests showed that the film surface damage was quite small,and was of good resistance to corrosion medium after being soaked in the salt solution.Condensation dehydration occurred on organic substances during the curing process;meanwhile,the cross- linking accumulation phenomenon was observed among resin,silane and nano-SiO_2.Although the surface roughness of the conversion films was increased,the cross-linking degree and density were improved and the corrosion resistance of the films was also enhanced.

关 键 词：自润滑 高导电 无铬耐指纹复合转化膜 性能 镀锌板 

分 类 号：TG174.46[金属学及工艺—金属表面处理]