The synergistic effect of organic additives and pulse-current plating in a gold electrodeposition citric acid bath was investigated. Then the corrosion resistance of the gold plating film was evaluated by physicochemical methods. By the synergistic effect, the bath containing 2, 3-diaminopyridine (23DAmPy) produced both lower film porosity and higher gold deposition efficiency. These properties are due to the moderate physical adsorption of 23-DAmPy, whose structure is susceptible to cation, under pulse-current plating. In any event, the synergistic effect appears in pulse-current plating in the bath containing organic additive.
