82环境技术/EnvironmentalTechnology技术专栏echnicalColumnT摘要：封孔工艺对2A12航空铝合金微弧氧化膜层的微孔和裂纹进行了填充，是重要的微弧氧化后处理工艺。本文对比研究了封孔工艺对2A12航空铝合金微弧氧化膜层厚度、硬度、粗糙度和耐蚀性的影响。使用扫描电子显微镜、能谱仪、X射线衍射仪分别对微弧氧化膜层的微观形貌、元素组成、晶相结构进行表征分析，使用涂层测厚仪、维氏显微硬度仪、粗糙度检测仪、酸性盐雾箱分别对封孔工艺处理前后膜层的厚度、硬度、粗糙度、耐蚀性进行测试。对2A12航空铝合金微弧氧化膜层进行硅烷封孔工艺处理，其厚度与硬度无明显变化、粗糙度降低，耐蚀性能显著提升，硅烷3次封孔后的膜层经过酸性盐雾试验192h无腐蚀痕迹，为后期铝合金微弧氧化在航空领域的应用提供了参考。关键词：2A12航空铝合金；微弧氧化；陶瓷膜；封孔工艺；耐蚀性中图分类号：V261.93文献标识码：A文章编号：1004-7204(2023)02-0082-07封孔工艺对2A12航空铝合金微弧氧化膜的影响InfluenceofSealingProcessonMicro-ArcOxidationFilmof2A12AviationAluminumAlloy殷强，何卫平，王媛媛，王浩伟，尹凤雷，韦利军（中国特种飞行器研究所结构腐蚀防护与控制航空科技重点实验室，荆门448035）YINQiang,HEWei-ping,WANGYuan-yuan,WANGHao-wei,YINFeng-lei,WEILi-jun(AviationKeyLaboratoryofScienceandTechnologyonStructuralCorrosionPreventionandControl,ChinaSpecialVehicalResearchInstitute,Jingmen448035)Abstract：Thesealingprocessisanimportantpost-treatmentprocessofmicroarcoxidationfor2A12aviationaluminumalloy,whichfillsthemicroholesandcracksinthefilm.Theeffectsofsealingprocessonthethickness,hardness,roughnessandcorrosionresistanceof2A12aviationaluminumalloymicro-arcoxidationfilmarecomparativelystudied.Scanningelectronmicroscope,energydispersivespectroscopyandX-raydiffractometerwereusedtocharacterizeandanalyzethemicro-arcoxidationfilm’smicrostructure,elementalcompositionandcrystallinephasestructure.Coatingthicknesstester,vickersmicrohardnesstester,roughnesstesterandacidsaltsprayboxwereusedtotestthethickness,hardness,roughnessandcorrosionresistanceofthefilmbeforeandafterthesealingprocess.Themicro-arcoxidationfilmof2A12aviationaluminumalloywastreatedbysilanesealingpr...
