Available Coatings of Sintered NdFeB Magnets

Available Coatings of Sintered NdFeB Magnets by HTMAGNETS.COM
1.Different plating,different SST Result, Salt spray test result,which is plated by Grinding(Samll size magnet),is better than that one,which is coated by Hanging up(Big size magnets).
2.Salt spray test(SST) test condition:5% Continuously spray a certain time, test whether there is corrosion on coating surface.
3.Pressure cooking test (PCT)test condition: 2ATM, 95% RH(Retative humidity),121℃, to test the coating adhesion. Notes: The products coating Zine, passivated / phosphated, or coating Epoxy are not suitable for PCT.
4.Other methods to test the coating quality:Drop test,Cross cut test, Heating and Spilling test, constant temperatu and humidity test ect.
1.因电镀工艺不同，盐雾效果有所不同。滚镀（小尺寸磁铁）的盐雾效果试验比挂镀产品（大尺寸磁铁）要好。
2.盐雾试验（SST)条件：5%的氯化钠，35摄氏度的温度，连续喷雾一个小时以后，镀层表面是否有腐蚀物。
3.压力试验（PCT)条件：2个大气压，95%相对温度，121℃温度时检验镀层的结合力，镀锌，磷化，钝化，环氧不做压力试验。
4.镀层质量的检测方法有：跌落试验，划格试验，极冷熬热试验，恒温恒湿试验等。