Abstract:

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.

Key words: Additives, Ni deposits, Electrochemical activity, Texture