EFFECTS OF SACCHARIN ON THE ELECTRODEPOSITION OF Ni-Fe ALLOY FILMS.

Effects of saccharin on the electrodeposition of Ni-Fe alloy films from a sulfate-chloride bath has been studied. The polarization curve, differential capacity, the composition of Ni-Fe alloy films, and the current efficiency were measured as a function of the plating time for the electrodeposition of Ni-Fe alloy films in the presence or absence of saccharin in the plating bath at 47 degree C. The adsorption of saccharin on the electrode resulted in a decrease of differential capacity, and the polarization curves were shifted towards more negative value giving a smooth and bright deposit. The Fe content of Ni-Fe alloy films increased with a decrease of coulombs passed in the electrodeposition of the Ni-Fe alloy film. An addition of saccharin to the bath led to an increase of anomalous codeposition of Ni-Fe alloys.