摘要
主要研究了氧化锌对以Al(H2PO4)3为基料的无铬无取向硅钢绝缘涂层各项性能的影响.用盐雾实验和动电位极化研究了不同氧化锌含量对硅钢绝缘涂层的耐蚀性和电化学行为的影响.采用SEM和体视显微镜对涂层的表面形貌和附着性能进行研究.结果表明,氧化锌含量为4.0%时,氧化锌能完全中和涂层表面的游离磷酸,涂层的耐蚀性和附着性最好;氧化锌含量过少或过多时,涂层的耐蚀性和附着性都较差.
This paper studies the influence of zinc oxide on the performance of chromium-free non-oriented silicon steel insulating coating which based on aluminum dihydrogen phosphate.Salt spray experiment and potentiodynamic polarization were used to study the influence of zinc oxide content on the corrosion resistance and electrochemical behavior of the insulation coating of silicon steel.The surface morphology and adhesion of coating were tested by SEM and stereo microscope.The results show that when the zinc oxide content is 4.0%,the free phosphoric acid in the coating surface can be completely neutralized by zinc oxide and the coating has best corrosion resistance and adhesion;when zinc oxide content is too low or too high,the coating has poor corrosion resistance and adhersion.
出处
《材料科学与工艺》
CAS
CSCD
北大核心
2013年第3期116-121,共6页
Materials Science and Technology
关键词
硅钢
无铬涂料
氧化锌
磷酸盐
silicon steel
chromium-free coating
zinc oxide
phosphate
