无取向电工钢用磷酸盐系绝缘环保涂层的研制及性能研究  

Development and Performance of Phosphate-based Protective Insulation Coating for Non-oriented Electrical Steel

作　　者：胡雄鑫 张弦 刘静 吴开明 林安[2] HU Xiongxin;ZHANG Xian;LIU Jing;WU Kaiming;LIN An(Hubei Province Key Laboratory of Systems Science in Metallurgical Process,Collaborative Innovation Center for Advanced Steels,The State Key Laboratory of Refractory Material and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;School of Resource and Environmental Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉科技大学耐火材料与冶金省部共建国家重点实验室高性能钢铁材料及其应用省部共建协同创新中心冶金工业过程系统科学湖北省重点实验室,汉430081 [2]武汉大学资源与环境科学学院,汉430072

出　　处：《中国腐蚀与防护学报》2022年第5期805-812,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51601138和51601137)

摘　　要：以磷酸盐为基础成膜剂,添加稀土钝化剂与硅烷偶联剂,研制了一种无取向电工钢用绝缘环保涂料,对添加不同助剂的涂层的显微形貌、电化学性能、成分组成和盐雾性能进行了表征和测试。结果表明,在成膜剂中添加稀土钝化剂可有效填补涂层中的孔洞,进一步添加硅烷偶联剂可分散稀土盐沉淀,使复合涂层表面更均匀且无明显缺陷。电化学测试结果显示复合涂层的腐蚀电流密度最小,极化电阻值最大,结合盐雾测试结果表明其具有出色的耐腐蚀性能。此外,复合涂层的层间电阻、附着力及铅笔硬度等性能均优于工业标准。A protective insulation coating for non-oriented electrical steel plate was developed with phosphate-based film forming agent,rare earth passivator and silane coupling agent as raw material.The microstructure,composition,electrochemical performance and resistance to salt spray testing of the coatings with different additives were characterized and assessed.The results show that adding rare earth passivator to the film forming agent can effectively fill the pores on the surface of coating.While the addition of silane coupling agent may be beneficial to the dispersive distribution the rare earth salt precipitates,thereby,resulting in a more uniform surface without obvious defects of the composite coating.The electrochemical test results show that the composite coating presents lower corrosion current density and larger polarization resistance.Taking the salt spray test results into consideration,it is evident that the composite coating has excellent corrosion resistance.In addition,the properties of the composite coating,such as interlayer resistance,adhesion,and pencil hardness are all higher than the requirements of the relevant industrial standards.

关 键 词：电工钢 磷酸盐涂层 稀土 硅烷 耐腐蚀性能 

分 类 号：TG174[金属学及工艺—金属表面处理]