取向硅钢用无铬绝缘涂层的配制及性能

发布时间：2018-06-02 12:30

本文选题：取向硅钢 + 绝缘涂料　；参考：《电镀与涂饰》2015年22期

【摘要】：以磷酸二氢铝、硅溶胶、水性丙烯酸改性环氧-聚氨酯树脂、十水合四硼酸钠为主要原料制备了一种适用于取向硅钢的环保型无铬绝缘涂料。采用单因素试验考察了各组分用量对涂层耐蚀性和附着力的影响,得到最优配方(以质量分数表示)为:树脂25.00%,磷酸二氢铝0.70%,硅溶胶20.00%,十水合四硼酸钠0.70%。利用电化学分析和中性盐雾试验、机械性能测试、绝缘电阻测试仪和磁性测量仪研究了最优配方所得绝缘涂层的耐蚀性、附着力、铅笔硬度、绝缘性及磁特性,通过扫描电镜、能谱仪和红外光谱仪对其进行了表征。结果显示,涂膜均匀平整;盐雾试验8h时未出现腐蚀,耐蚀性与磁特性均与市售含铬涂层相当;层间表面绝缘电阻系数基本保持在488?·cm~2,好于市售含铬涂层。
[Abstract]:Using aluminum dihydrogen phosphate, silica sol, waterborne acrylic acid-modified epoxy polyurethane resin and sodium tetraborate decahydrate as main raw materials, an environment-friendly chromium free insulating coating for oriented silicon steel was prepared. The effects of the amount of each component on the corrosion resistance and adhesion of the coating were investigated by single factor test. The optimum formula (expressed by mass fraction) was obtained as follows: resin 25.00, aluminum dihydrogen phosphate 0.70, silica sol 20.00, sodium tetraborate decahydrate 0.70. The corrosion resistance, adhesion, pencil hardness, insulation and magnetic properties of the insulation coating obtained from the optimum formulation were studied by electrochemical analysis, neutral salt spray test, mechanical property test, insulation resistance tester and magnetic measuring instrument. It was characterized by energy spectrometer and infrared spectrometer. The results show that the coating film is even and flat, no corrosion occurs at 8 h after salt spray test, the corrosion resistance and magnetic properties of the coating are equal to those of the chromium-containing coatings sold on the market, and the insulation resistance coefficient of the interlayer surface is basically maintained at 488cm ~ (-2), which is better than that of the chromium-containing coatings sold on the market.
【作者单位】：武汉科技大学应用化学研究室;
【分类号】：TQ630.1;TG178

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