非晶态Ni-Fe-P合金屏蔽织物的工艺优化及耐蚀性研究

Study of the process optimization and corrosion resistant of shielding fabric by amorphous Ni-Fe-P alloy

通过在已化学镀铜涤纶织物上电沉积非晶态Ni-Fe-P合金,制备出一种镀层致密均匀的柔性金属化屏蔽织物。研究和分析了电流密度、温度和p H值对合金织物方阻值、增重率及屏蔽效能的影响,从而制定出最佳工艺。通过对比腐蚀前后非晶态Ni-Fe-P合金和非晶态Ni-P合金镀层表面形貌、成分和电磁屏蔽效能可以得出,在电流密度为8.7 A/dm2,温度为60℃,p H值=1.5的工艺条件下所制备的非晶态NiFe-P合金织物结晶更加细化、光亮,致密性和均质性都得以明显提高,并具有良好的耐腐蚀性能,且在300 k Hz^1.5 GHz频率范围内的电磁屏蔽效能达到了69.20~80.30 d B。

A flexible shielding fabric with dense uniform coating was prepared after electrical deposition of amorphous NiFe-P alloy on copper-coated polyethylene terephthalate( PET) fabric. The effects of alloy fabric ohms per square,weight gain rate and shielding effectiveness were discussed by the current density,temperature and p H value. The morphology and composition of coating of amorphous Ni-Fe-P alloy and amorphous Ni-P alloy were analyzed by SEM and EDS. The EMI shielding effectiveness and corrosion resistance were also tested. The results fabric possesses dense,smooth,and uniform coating,when the processing conditions are 60 ℃,p H = 1. 5,and current density = 8. 7 A / dm2. The alloy fabric has excellent of corrosion resistance. The EMI shielding effectiveness of this alloy fabric achieves 69. 20-80. 30 d B in a broad frequency range between 300 k Hz-1. 5 GHz.