| 摘要 |
PURPOSE:To prepare the title plating soln. capable of obtaining the bright plating film of metallic rhodium having high hardness and high corrosion resistance and capable of imparting smooth and beautiful appearance to the desired finished surfaces of industrial products and ornaments by incorporating modified silicone oil into a rhodium sulfate plating soln. as a brightening agent. CONSTITUTION:Modified silicone oil is added to the extent of 0.1mg-200g/l into a rhodium sulfate plating soln. as the brightening agent to obtain the desired bright rhodium plating soln. The silicone oil incorporated with a hydrophilic group, namely the silicon oil saponified by an alkali, alcohol-modified silicone oil, etc., can be exemplified as the modified silicone oil. The bright rhodium plating soln. of this invention is chemically stable even in long-time use, the soln. is insusceptible to electrolytic reduction even under ordinary plating conditions, and plating can be stably continued.
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