Electropolishing Gold
Quesion: Can you give me a formulation for the electropolishing of gold particularly 14- and 18-karat gold?
Share
Quesion:
Can you give me a formulation for the electropolishing of gold particularly 14- and 18-karat gold? J.J.
Answer:
I am not aware of any formulations that are completely reliable. However, one formulation that has been used in the jewelry business is as follows:
Component Concentration
Potassium cyanide 65 g/liter
Phosphoric acid 18 g/liter
Sodium potassium tartrate 15 g/liter
Ammonium hydroxide 2.5 mL/liter
A voltage of 8 –10 volts and a temperature of 50–60°C should be used. Great care should be exercised with this process in that a large amount of gold can be removed in a short period of time.
In any event, some experimentation will be required to get the results you are looking for.
Related Content
-
A Chromium Plating Overview
An overview of decorative and hard chromium electroplating processes.
-
Products Finishing Reveals 2023 Qualifying Top Shops
Each year PF conducts its Top Shops Benchmarking Survey, offering shops a tool to better understand their overall performance in the industry. The program also recognizes shops that meet a set of criteria to qualify as Top Shops.
-
Advantages to Pumped Eductor Agitation
Not all agitation methods are created equally. Pumped agitation with eductor nozzles can improve process tanks and quickly show a reduction in operating costs while keeping staff safe, following environmental legislation and preventing pollution.
