用泡沫铁镍合金镀层替代金属镍镀层,可以节约镍资源和生产成本.通过电沉积在导电化处理过的聚氨酯泡沫棉上制备了低镍泡沫铁镍合金镀层,并对电解液体系及制备工艺条件进行了研究.结果表明:升高镀液温度和增大电流密度可以细化晶粒;二元有机酸配位剂H-1使得赫尔槽试样光亮区明显增长;H-1和MnCl_2均能使阴极极化增强;镍离子使阳极峰显著正移200 mV,抗蚀性增强;制备的低镍泡沫铁镍合金镀层结晶致密,显微硬度高达770 HV.
Electrodeposited foam iron-nickel alloy coating with low content of nickel was prepared on polyurethane foam which was treated to be conductive. The effects of the electrolyte system and technical parameters on the morphology and corrosion resistance of the alloy coating were investigated. Hull-cell experiments indicated that the complexing agent H - 1, a binary organic acid,caused obvious widening of the bright area. The grain size of the alloy coatings decreased with increasing temperature and cathodic current density as well. Moreover, both H-1 and MnCl_2 contributed to the enhancement of cathodic polarization, while Ni~(2+)caused positive shift of anodic dissolution peak by about 200 mV and led to increased corrosion resistance of the alloy coating. At the same time, the electredeposited foam Fe-Ni alloy coating was compact and had a hardness of as much as 770 HV.
参考文献
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