In electroplating applications, the desired plated metal is dissolved in an electrolyte, the plated metal substrate is used as the negative electrode, and the anode is used as the positive electrode, i.e., a complete current transfer cycle is formed. The chemical reaction that occurs in the plating bath in conjunction with the plating is the precipitation of oxygen on the surface of the anode.
The advantage of the Titanium Anode over non-inert anodes, such as graphite, is that it maintains a stable distance between the positive and negative electrodes (inter-electrode distance) over its service life. Whereas graphite anodes gradually dissolve during use, causing the distance between the electrodes to increase, inert titanium anodes guarantee a stable voltage and product quality. Due to the catalytic properties of the platinum group elements, the electrode surface has a large exchange current density value and a low oxygen precipitation overpotential, and a special process is specially used to make an oxide film with a microfine structure on the titanium surface, which results in a great active surface area per unit electrode, and is therefore particularly suitable for high-speed, high-current-density electroplating production.
In addition to titanium anodes and graphite, lead anodes can also be used in this field. However, when lead anodes are dissolved, their reactants have a negative impact on the environment. These problems can be avoided with titanium anodes. Oxygen precipitating titanium anodes have a lower operating voltage, which also saves energy.
Another advantage of using titanium anodes is the reusability of the titanium substrate. When the coating life of the titanium anode reaches the end of its useful life, anodized aluminum foil is a material commonly used in the lithographic printing industry. It works on the same principle as the electroplating process, where a very thin layer of metal is applied to the surface of the base metal. By placing the aluminum in an anodized state, the surface of the aluminum oxidizes. As a result of the anodizing (oxidation) process, the surface of the aluminum is better able to bond with the photosensitive coatings required in the lithographic printing industry.
In the metal plating industry, whether it is Platinum Coated Titanium Anode, Iridium Coated Titanium Anode, or Ruthenium Coated Titanium Anode, etc., they are used to plate a variety of different substrates, from small batch production of jewelry to continuous large scale production of plated steel sheets. from small batch jewelry production to continuous large scale production of electroplated steel sheets. Our company PSX's anode products help to diversify the plating substrates, and their diversification is reflected in the diversity of our anode products. Comparison of superiority with conventional lead anode for electroplating：
1) Low bath voltage, low energy consumption
2) Low rate of electrode loss, stable size
3) The electrode has good corrosion resistance, insolubility and non-pollution of the bath, which makes the performance of plating layer more reliable.
4) Titanium anode adopts new material and structure, which greatly reduces its weight and facilitates daily operation.
5) Long service life and reusable substrate saves cost.
6) Oxygen overpotential is about 0.5V lower than that of lead alloy insoluble anode, which lowers the bath voltage and reduces energy consumption.
Electrochemical performance and life test (reference standard HG/T2471-2007 Q/CLTN-2012)
| Title | Enhanced Weightlessness (mg) | Polarization Ratio (mv) | Oxygen/chlorine potential V | Test Conditions |
| Titanium-based iridium-tantalum | ≤10 | ＜40 | ＜1.45 | 1mol/L H2SO4 |
| Titanium-based ruthenium-iridium | ≤10 | ＜40 | ＜1.13 | 1mol/L H2SO4 |
| Titanium-based platinum | ≤1 | ＜40 | ＜1.75 | 1mol/L H2SO4 |
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