聚酰亚胺表面化学镀镍-磷合金研究

Research of Electroless Ni-P Alloy Plating on Polyimide Substrate

本文利用甲醛在铜表面的自分解反应成功地在聚酰亚胺表面制备了化学镀镍-磷合金层。采用扫描电子显微镜、光谱仪、四探针法、动电位极化以及电化学阻抗法对制备出的镍-磷合金镀层的微观形貌、反射率、表面电阻以及耐腐蚀性进行了表征,并参照国家标准GBT 5270-2005测试了镀层的结合力。结果表明,聚酰亚胺表面的化学镀镍-磷合金层光滑平整,反射率高达95%以上,表面电阻率10Ω·cm左右,结合力符合国家标准,耐腐蚀性能远优于镀银层。

The electroless Ni-P coating was successfully prepared by utilizing the self-decomposition of formaldehyde on copper surface. The micro morphology, reflectivity, surface resistance and corrosion resist- ance of the prepared Ni-P coating were characterized by scanning electron microscope spectrometer, four- point probe method, potentiodynamic polarization and electrochemical impedance method, and also the ad- hesion strength was tested according to the National Standard GBT 5270-2005. Results showed that the prepared Ni-P coating on polyimide substrate was smooth and flat, the reflectivity was as high as 95 %, the surface resistivity was about 10Ω·cm,the adhesion strength met the National Standard and the corrosion resistance was far superior to silver plating.