Welcome to Titanium Anode Branch Of Firmakes Titanium Co., Ltd.
Inquiry cart ( 0 )
Technical Articles

Auxiliary Anode Material For Chromium Electroplating - Application Of Noble Metal Coated Titanium Anode Graphite Anodes

Views : 332
Update time : 2021-07-17 18:19:42
Mixed metal oxide (MMO) electrode materials are more and more popular in many electroplating applications. These dimensional stable electrodes have high catalytic activity and, due to their excellent corrosion resistance, maintain a uniform current density and do not contaminate the bath, resulting in a more uniform coating distribution. It is especially important for areas with poor aspect ratio or deep pits of the plated parts. However, MMO coatings may be adversely affected by additives in the bath and their service life may be affected.
Hexavalent chromium has long been the industry standard for decorative plating applications. This process typically uses a tin-lead anode as the main anode in the system. Mixed metal oxides can also be used as auxiliary anodes in applications requiring plating to deep pits and very low current density areas. However, due to its certain pollution and heavy metal elements in the wastewater, the treatment cost is relatively high. Therefore, trivalent chromium is becoming more and more popular in the field of decorative plating.

 Firmakes produces and develops a special auxiliary anode material for chromium plating. The catalytic layer on the surface of the anode has a unique shape, which is different from the commercially available mixed metal oxide electrode coating. Compared with the typical mixed metal oxide electrode, the electrocatalytic coating of Uchuangke Technology is relatively smooth and denser. The combination strength of the coating and the substrate is good, which improves the electrocatalytic activity, corrosion resistance and service life. Moreover, it can be customized for special-shaped parts with complex shape.
 In order to adjust the catalytic activity of the electrode by mixing the coating and combination of nanoscale refined grains, the catalytic coating of the insoluble anode can be customized according to the plating solution and current density conditions to effectively control the electrode working potential. In this way, oxidation of additives can be inhibited when used in electroplating and surface treatment processes, or in another formulation, it can significantly reduce the amount of chloride released in a high chloride environment. This can greatly reduce the production of harmful chlorine in chlorine-containing bath fluids