Prepareation of a Gold Enriched Retreat Plating Solution and It′s High Efficient

With aromatic nitro compounds and potassium hydroxide as raw materials,bismuth compounds as catalyst,D-gluconic acid potassium and potassium citrate in a certain proportion as additives,adding suitable amount of surfactant,a high efficient gold enriched retreat plating solution was prepared.The catalytic mechanism of bismuth compounds was studied,and additives were used for comparing the efficiency.The results showed that the choice of bismuth compound instead of traditional inorganic catalysts (Fe3+,Co3+ and Ni2+) could improve the gold plating retreat rate effectively.With the assistance of the surfactant,D-gluconic acid potassium and potassium citrate,the efficiency of retreat of gold plating could be improved further.