添加剂的吸附行为及其对Ni沉积层性能的影响

采用电化学及X射线衍射等方法研究有机添加剂苯磺酸钠、苯亚磺酸钠和糖精的吸附作用及其对Ni电沉积层的电化学活性、晶粒尺寸、织构及显微硬度的影响．结果表明，苯亚磺酸钠和糖精使Ni沉积层的电化学活性提高，（111）晶面的织构系数明显增大，而使（200）晶面的织构系数减小，还导致沉积层的晶粒尺寸显著减小和显微硬度提高；然而，苯磺酸钠对沉积层的活性及织构影响很小．讨论了上述添加剂的作用．

Adsorption of Additives and their Effect on Properties of Ni Deposits

Adsorption of sodium benzene sulfonate, sodium benzene sulfinate and saccharin and their effects on the electrochemical activities, grain sizes, textures and microhardness of Ni deposits were studied by means of electrochemical methods and X-ray diffraction. The results show that, the Ni deposits obtained from bath containing sodium benzene sulfinate or saccharin behave with higher electrochemical activities and microhardnesses and much smaller grain sizes than that from the bath without additive; and the texture coefficient of (111) face is obviously increased, whereas that of (200) face is decreased; but sodium benzene sulfinate has not any effect on the activity and texture of Ni deposit. The effects of the above activities have been discussed.