Precautions for the use of electrodes:
1. The titanium electrode has a black surface after oxidation and sintering. The uncoated surface is blue and has no electrode performance. The black side corresponds to the cathode.
2. Once the titanium electrode substrate is pickled, all subsequent production and processing procedures and use procedures must be carried out strictly and carefully. Wear clean gloves to get stuck at both ends or edges of the anode during transportation, preferably in contact with the uncoated part. Any foreign objects are strictly prohibited from scratching the coating surface. Care must be taken in installation and handling, and the surface of the coating must not be crossed, otherwise, it will quickly corrode locally.
Note: The titanium substrate itself is not conductive, and its outer layer is coated with a noble metal oxide coating that has electrocatalytic activity, conductivity, and oxidation resistance, but its thickness is only about 20 microns. During the process, the electrode will first corrode from the damage, which will affect the quality and effect of the entire electrode.
3. The electrolyte maintains stability, especially can not contain cyanide ions and fluoride ions, these impurities will seriously corrode the titanium matrix; affect the service life of the anode.
4. Add a filter device before the electrolyte enters the electrolytic cell, and cannot contain metal particles with a diameter greater than 0.1mm to prevent excessive aggregation and lead to a short circuit of cathode and anode. Shielded anode performance. If the plate is fouled, it needs to be cleaned with dilute hydrochloric acid instead of brushing.
5. When electrolytic recovery of metals such as copper, nickel, gold, silver, cobalt, etc., the cathode attachment should not be too thick to prevent the short-circuit breakdown of the cathode and anode due to too small electrode spacing or metal thorns. Periodic cleaning is required.
6. The spacing between cathode and anode can be set according to actual production, generally 5-25mm. Generally speaking, the pole distance will increase the voltage drop, but it should not be too small, otherwise, the cathode scale generated on the cathode surface will easily cause a short circuit of the pole plate; so the design of the pole distance needs to be determined according to the structural state of the product.
7. Avoid using it backward. Once the noble metal oxide coating is used as a cathode, the surface undergoes a reduction reaction and is easily converted into a metal element, which cannot be effectively combined with the titanium base, causing the coating to fall off.
8. It is not advisable to soak in the solution in the power-off mode for a long time during the shutdown, and it is best to load a small current of about 5a to protect the plate.
9. When shutting down or in other maintenance conditions, add dilute acid or clean the electrode surface with clean water, but do not wash it with nylon or mechanical substances.
10. The temperature of the electrolyte should not be too high when working, the ideal temperature is 25-40 °C, and a heat exchange device can be added to maintain the best use environment for the electrode.
11. The average working current density is within 2000a/m2, the current is too large, the reaction is too intense, the coating falls off, and the life of the anode is shortened;
12. When starting up, load the current to the electrolytic cell step by step, do not raise it to the position at one time; the same is true when it is stopped.
13. Keep the anode clean during production and use, and cannot be contaminated with oil or other attachments, so as not to affect the electrolysis effect and the life of the electrode.
14. The titanium anode has life, and ensuring the stability of production is more beneficial to prolonging the service cycle. If the coating of the anode is peeled off, the coating should be repaired in time to prevent the cell voltage from being too high.
titanium anode1
titanium anode2
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