Titanium anodes serve as the anodes with a titanium base oxide coating. The purpose of the metal oxide coating is to provide low resistivity and excellent conductivity, as titanium itself has poor conductive properties. The stable chemical composition and crystal structure of the noble metal coating ensure stable electrode size, good corrosion resistance, and a long lifespan. Additionally, the coating exhibits remarkable electrocatalytic performance, reducing the overpotential for oxygen evolution and chlorine evolution reactions, thus saving energy. Consequently, it is crucial to pay attention to the surface coating of the anode during its usage.
Titanium anode use and maintenance
When handling or processing the anodic matrix after pickling, it is essential to wear clean gloves and avoid touching the coating to protect it from pollution or scratches caused by foreign bodies. Any scratches or damages can lead to corrosion starting from those points, thus affecting the overall performance of the anode during electrolysis.
The electrolyte should be maintained stable and free from hydrogen ions and fluoride ions, as they can cause severe corrosion of the titanium matrix.
Before introducing the electrolyte into the electrolytic cell, a filter device should be used to remove any metal particles larger than 0.1mm. This precaution prevents excessive aggregation that may result in a short circuit between the cathode and anode.
The cathode attachment should not be too thick to prevent a small pole spacing or the formation of sharp metals that could cause a short circuit between the anode and cathode.
The distance between the cathode and anode poles should be adjusted appropriately, typically ranging from 5 to 25mm.
The use of guide electrodes should be avoided to prevent coating detachment and minimize its impact on the service life of the anode.
When shutting down the machine, it is advisable not to leave the anode immersed in the solution while still under power. Adding a small current protection cathode plate of approximately 5A is recommended.
When cleaning or washing the surface of the electrode plate, caution should be exercised to protect the surface and avoid using sharp objects.
The electrolyte temperature should be kept within a reasonable range of 25-40 degrees Celsius during operation.
Attention should be paid to the working current density, ensuring it stays below 2000A per square meter. Excessive current can lead to an intense reaction, potentially affecting the electrode's lifespan.
When starting the machine and supplying current to the electrolytic cell, it should be done gradually, step by step, instead of all at once. Similar care should be taken when shutting down the system.
Regularly clean the electrode surface and prevent contamination with oil or other substances that could interfere with the electrolytic effect and reduce the electrode's lifespan.
