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Electroplating solution refers to a liquid that can expand the range of metal cathode current density, improve the appearance of the coating, and increase the stability of the solution against oxidation.
Electroplating solutions usually include:
Main salt: The salt containing the deposited metal, which provides the ions of the electrodeposited metal. It exists in different electroplating solutions in the form of complex ions or hydrated ions; the higher the concentration of the main salt, the higher the current efficiency. The metal The deposition rate will also increase, while the coating grains are coarser and the solution dispersion ability decreases.
Conductive salt, used to increase the conductivity of the solution, thereby expanding the allowable current density range;
Anode active agent: A substance that can promote anode dissolution and increase anode current density, thereby ensuring that the anode is in an activated state and can be dissolved normally. ;
Buffer: A substance used to adjust and control the pH of a solution. Such substances have a good buffering effect, but should not be too much.
Additives: can improve the performance of the coating and the quality of electroplating, such as leveling agent, brightener, anti-pinhole agent, etc. The brightener is mainly used to increase the brightness of the coating, without the polishing process. The function of the wetting agent is to increase the interfacial tension between the metal and the solution. Levelers can change the microscopic flatness of the metal surface. The stress relief agent can reduce the internal stress of the coating and improve the toughness of the coating.
Except for the main salt and conductive salt, not all electroplating solutions must contain the above-mentioned components.
The electroplated rhodium is silver-white and has the characteristics of high reflectivity, good wear resistance, low contact resistance, good electrical conductivity, and high chemical stability. It is used in optical instruments (such as chemical instruments, mirrors, microscopes, reflective coatings), electrical industry (Such as the surface contact layer on radio or audio, the wear-resistant layer of the connector on the printed circuit board and the decorative layer, the anti-silver discoloration layer, etc.), jewelry processing and other fields have a very wide range of applications.
The main salts of rhodium electroplating solution include rhodium sulfate, rhodium phosphate, phosphoric acid, rhodium sulfate, rhodium perchlorate, rhodium sulfamate, rhodium fluoroborate, rhodium chloride, etc. If we vigorously develop a circular economy and efficiently recover rhodium from electroplating waste liquid for reuse, it is of great significance to expand the scale of precious metal resources and increase the self-supply of precious metals to meet the high-growth market demand. It is of great significance in economic development, scientific research, environmental protection and other fields.
The high-efficiency and simple process of Si-Novation can realize the capture and recovery of precious metal rhodium from the waste electroplating solution, meeting environmental protection requirements, and helping customers obtain high-value economic returns.China Precious Metal Recovery/Removal manufacturers
website:http://www.si-novations.com/metal-scavengers/precious-metal-recovery-removal/