化学镀Ni-P-聚四氟乙烯复合镀层及其性能

Technologies and Properties of Electroless Ni-P-PTFE Composite Coatings

向一种含双络合剂的化学镍液中加入PTFE(聚四氟乙烯)浓缩乳液,成功获得了PTFE含量为25％～30％vol的Ni—P—PTFE复合镀层。应用X—Ray衍射仪、扫描电子显微镜、差热分析等对镀层组织结构和性能进行了测定。结果表明,这种镀层为非晶态结构,与基体结合良好,具有低的孔隙率和低的摩擦系数,是一种耐蚀、自润滑的表面复合材料镀层。

Electroless Ni - P PTFE composite coating, that contain 25 % - 30 % vol PTFE particles, have been successfully obtained through adding 8 - 10mL PTFE condensed dispersion into an electroless nickle bath containing two kinds of complex agents. The microstructure,surface morphology and characterstics of Ni - P- PTFE composite coating are investigated by means of XRD,SEM,DTA etc.. The results show the composite coating as deposited is amorphous, having excellent adherent,lower porosity and coefficient of friction. It is a kind of surface composite coating with resistance corrosion and self- lubricating function.