激光刻痕对高磁感取向硅钢板耐蚀性的影响

Effect of Laser Scribing on Corrosion Resistance of High-Magnetic Induction Oriented Silicon Steel Plates

通过扫描电镜(SEM)和能谱仪(EDS)对激光刻痕后高磁感取向硅钢表面进行形貌观察和化学成分分析,并采用硫酸铜点滴试验、加速腐蚀试验(交变湿热试验及动态接触湿热试验)研究了激光刻痕对取向硅钢耐蚀性的影响。结果发现:激光刻痕对取向硅钢表面涂层厚度均匀性和平整性造成破坏,使取向硅钢基体出现裸露的情况,耐蚀性大幅降低。

The morphology and chemical composition of laser-notched high-magnetic induction oriented silicon steel surface were examined by scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS).And the effect of laser scribing on the corrosion resistance of oriented silicon steel was investigated through copper sulfate drip test and accelerated corrosion test(including cyclic damp heat test and dynamic contact damp heat test).The results showed that laser scribing damaged the thickness uniformity and flatness of the coating on the surface of oriented silicon steel,exposing the substrate of oriented silicon steel and greatly reducing its corrosion resistance.