本工作系统地考察了十二烷基苯磺酸钠(ABS-Na)、十二烷基硫酸钠(DS)、聚乙二醇(6000)(PEG(6000))、吐温-80(Tween-80)等表面活性剂及其组合对镁合金化学复合镀Ni-P-SiC的镀液稳定性、镀速、镀层表面形貌和性能的影响,并优选了适合镁合金化学复合镀Ni-P-SiC镀层的表面活性剂.结果表明:随着表面活性剂加入,镀液稳定性明显改善;表面活性剂的种类对镀速有重要影响,含十二烷基苯磺酸钠+聚乙二醇(6000)复合型表面活性剂的镀液镀速最快.综合考虑复合镀层的表面质量、显微硬度和耐腐蚀性能,优选的适于镁合金化学复合镀Ni-P-SiC的表面活性剂是十二烷基硫酸钠+聚乙二醇(6000)的复合物.
The effect of different surfactants, such as neopelex(ABS-Na), lauryl sodium sulfate(DS), polyethylene glycol(6000)(PEG(6000)), Tween-80 and their mixtures, on the stability of plating solution, deposition velocity of electroless plating Ni-P-SiC, morphology and performances of Ni-P-SiC composite coating on magnesium alloys was studied. Further, the optimization surfactant for electroless plating Ni-P-SiC composite coating on magnesium alloys was selected. The results show that the surfactants can evidently improve the stability of electroless plating Ni-P-SiC solution, the species of surfactants have an important effect on deposition velocity, the deposition velocity of the plating solution containing neopelex+polyethylene glycol(6000) is the fastest. Based on the surface quality, hardness and anti-corrosion performance of the Ni-P-SiC composite coating, mixture of lauryl sodium sulfate+polyethylene glycol(6000) is selected as the best adaptive surfactant for electroless plating Ni-P-SiC composite coating on magnesium alloys.
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