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  • Notes on using TITAN electrodes

    Notes on using TITAN electrodes

    1.After the titanium electrode is oxidized and sintered, it has a black surface consisting of ruthenium dioxide, iridium dioxide and tantalum pentoxide. The black side is used for the cathode and the uncoated surface is a blue or gray titanium dioxide surface, which has no electrode performance.

    2.Once the titanium electrode substrate is immersed, all subsequent manufacturing and processing processes and the use procedures must be carried out strictly and carefully. When embezzlement, installation and disassembly, wear clean gloves so as not to get stuck at the ends or edges of the anode, it is best to touch the uncoated part, strictly prohibit any foreign objects from scratching the surface of the anode. coating.Note: The titanium base itself is not conductive, and its outer layer is coated with a precious metal oxide coating that has catalytically active, conductive and antioxidant activity, but its thickness is only about 20 microns. During this process, the electrode will not only corrode due to damage, thereby affecting the quality and performance of the whole electrode, and the titanium anode will reduce the service life significantly due to high current load i.e. time.

    3.The electrolyte maintains stability, especially can not contain cyanide ions and fluoride ions, these impurities will seriously corrode the titanium matrix.

    4.Add a filter device before the electrolyte enters the electrolytic cell, must not contain metal particles larger than 0.1mm in diameter to avoid excessive agglomeration resulting in short circuit of the cathode and anode.

    5.When recovering copper, nickel, gold, silver, cobalt and other metals by electrolysis, the cathode connector should not be too thick. Therefore, from the very beginning, special attention should be paid to the timing of copper stripping, in order to prevent short circuits of the cathode and anode due to the too small gap between the electrodes or the formation of metal spikes.

    6. The distance between the cathode and anode can be set according to actual production, generally 3-25mm (except for special purposes). In general, the pole spacing will reduce the voltage, but should not be too small, otherwise the cathode residue generated on the cathode surface will easily cause a short circuit of the plate, leading to electric honeycomb corrosion on the anode surface and negative.

    7. Avoid using reverse polarities. When the precious metal oxide coating is used as the cathode, the surface will also undergo a reduction reaction, which is easy to convert to a metallic element, and cannot effectively combine with the titanium matrix, causing the coating to fall off. . Pure titanium is used as the anode, the strong oxidation reaction on the surface will make the titanium material especially easy to melt.

    8.It is not recommended to soak in the solution for a long time in the power off mode during the shutdown, it is best to load a small current of 5A to protect the plate.

    9.When shutting down or overhauling the instrument, add dilute acid or clean the electrode surface with clean water, but do not wash with nylon or mechanical substances.

    10.The temperature of the electrolytic cell should not be too high during operation, the ideal temperature is 25-40 ℃, a heat exchanger can be installed to ensure the best electrode use environment.

    11.The normal working current density is less than 2000A/M2, if the current is too large, the reaction will be too strong and the life of the anode will be shortened.

    12. When starting up, charge the electrolytic cell with current step by step, do not lift to the position for a while and then stop completely.

    13. Keep the anode clean during production and use, free from oil or other residues so as not to affect the electrolytic efficiency and the life of the electrode.

    14. In the same electrolytic medium, different titanium anodes have different conductivity. The more precious metals are added, the greater the conductivity, catalytic activity and antioxidant performance of the anode. and prevent cathodic adhesion where there is too much or too rapid breakdown between the positive and negative electrodes.

    15.Anode has a lifetime, ensuring production stability is more beneficial to prolong service cycle.

     

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