DOI:10.11973/fsyfh-202212006硅烷含量对汽车钢板表面薄有机涂层防护性能的影响高志强1,任鸿儒1,侯利锋1,刘晓芳2,张铮1(1.太原理工大学材料科学与工程学院,太原030024;2.山西中医药大学中药与食品工程学院,晋中030619)摘要:以环氧硅烷为交联剂,水性丙烯酸为成膜成分,从而改善汽车钢板表面薄有机涂层的防护性能。采用反射率测定仪、共聚焦激光扫描显微镜(CLSM)和扫描电子显微镜(SEM),研究了硅烷含量对薄有机涂层形貌、耐水性和耐蚀性的影响,并通过电化学阻抗谱分析了硅烷含量对涂层防护性能的影响。结果表明:当涂层中硅烷的质量分数不超过1.00%时,随着硅烷含量的增加,涂层的耐水性和耐蚀性均显著提高,对钢板的防护性能增强;当硅烷质量分数超过1.00%时,硅烷不能完全融入涂层中,导致涂层内部存在缺陷,其防护能力有所降低。关键词:热镀锌;硅烷;涂层;腐蚀;电化学阻抗;化学交联中图分类号:TB37文献标志码:A文章编号:1005-748X(2022)12-0035-07InfluenceofSilaneContentonProtectivePerformanceofThinOrganicCoatingonAutomotiveGalvanizedSteelGAOZhiqiang1,RENHongru1,HOULifeng1,LIUXiaofang2,ZHANGZheng1(1.CollegeofMaterialsScience&Engineering,TaiyuanUniversityofTechnology,Taiyuan030024,China;2.CollegeofTraditionalChineseMedicineandFoodEngineering,ShanxiUniversityofChineseMedicine,Jinzhong030619,China)Abstract:Aimingatimprovingprotectiveperformanceofthinorganiccoatingsonautomotivegalvanizedsteels,theepoxysilanewasusedasacross-linkingagent,andwaterborneacrylicresinasafilmingredient.Effectofsilanecontentonmorphology,waterresistanceandcorrosiveresistancepropertieswereinvestigatedusingreflectivitytester,confocallaserscanningmicroscopy(CLSM)andscanningelectronmicroscopy(SEM).Theinfluenceofsilanecontentontheprotectiveperformanceofthecoatingwasanalyzedbyelectrochemicalimpedancespectroscopy.Theresultsshowedthatwhenthemassfractionofsilaneinthecoatingwaslessthan1.00%,withtheincreaseofsilanecontent,thewaterresistanceandcorrosiveresistanceofthecoatingweresignificantlyimproved,andtheprotectiveperformanceofthecoatingtothesteelplatewasenhanced.Whenthemassfractionofsilaneexceeded1.00%,silanecouldnotbecompletelyintegratedintothecoating,whichledtodefectsinthecoatingan...
