Titanium Anode for Aluminum Strip Anodising Introduction:

  1. Working conditions: ammonium adipate potassium adipate ammonium borate
  2. Current density: 400-1000 (A / m2)
  3. Voltage: 25-26V
  4. Plate size: 5 * 500 * 1500 (mm)
  5. Coating type: titanium-based iridium tantalum (low oxygen evolution overpotential)
  6. Service life: 18 months,
  7.  Electrochemical performance and life test (reference standard HG / T2471-2007 Q / CLTN-2012)

Titanium Anode for Aluminum Anodising

  1. Working conditions: ammonium adipate potassium adipate ammonium borate
  2. Current density: 400-1000 (A / m2)
  3. Voltage: 25-26V
  4. Plate size: 5 * 500 * 1500 (mm)
  5. Coating type: titanium-based iridium tantalum (low oxygen evolution overpotential)
  6. Service life: 18 months,
  7. Electrochemical performance and life test (reference standard HG / T2471-2007 Q / CLTN-2012)
Item Strengthen weightlessness

mg

Polarizability

mv

Oxygen evolution potential

V

Test Condition
Titanium anode coating Ir/Ta ≤10 40 <1.40 1mol/L H2SO4
  1. Composition of aluminum electrolytic capacitors
  2. Anode foil:

Aluminium—rolling and rolling—homogenization—planing and ingot surface—high temperature rolling—normal temperature rolling—aluminum foil finishing—washing and winding—annealing—cutting—bright foil (99.97%) — corrosion —Forming

Anode foil thickness: 50 60 70 75 80 90 95 100 104 110 microns

  1. Cathode foil: Light foil (99.4%)-corrosion-treatment
    Cathode foil thickness: 15 20 30 40 50 microns, etc.

This type of application is very particular: it uses activated Titanium as an external support to the main process which is the process of anode oxidation of the Aluminum coil for the construction of electric condensers.

In essence it’s about bringing current to the coil without a direct contact with the rollers that bring current, in order to avoid damages to the coil itself, caused by electrical discharges during the contact. This result is achieved by inserting in the coil’s flow, just before the oxidation cell, a supplementary electrolytic cell in which anodes are in activated Titanium and which reaction is that of the solo oxygen’s production for the anode and of hydrogen’s production for the cathode. (see diagram).

The formed foil is a product made of a special high-purity aluminum foil that expands its surface area after electrochemical or chemical corrosion, and then forms an oxide film (aluminum trioxide) on the surface after electrochemical formation. According to the voltage, the formed aluminum foil is generally divided into Very low pressure, low pressure, medium and high pressure and high pressure. According to the thickness, it ranges from 25 to 110 microns; according to the purpose, there are positive foil, negative foil, and guide foil.
High-voltage anode foil
High-voltage anode foils can be divided into two types, one is high-quality high-voltage foil; the other is ordinary high-voltage foil.
High-quality high-voltage anode foil is characterized by “two high and one thin”, namely high purity, high cubic texture and thin surface oxide film. These products are of high quality but high cost. The purity of aluminum is> 99.99%, and the cubic texture is 96%. The vacuum heat treatment is performed under the conditions of 10-3pa to 10-5Pa.
Ordinary high-voltage anode foil is an economical and practical high-voltage anode foil. The purity of aluminum is> 99.98%, and the cubic texture is> 92%.
Low-voltage anode foil
The process of low-voltage anode foil is relatively complicated. It is considered that it is impossible to adopt a method to meet the requirements of various voltages. It can be roughly divided as follows.
For low-voltage foils smaller than 35Vf, the corrosion of hard high-purity aluminum foil should be developed, which is characterized by the fact that the hard state can provide a large number of small cores and channels of corrosion. As for which type of power source, DC corrosion and AC corrosion, needs to be studied. The industry believes that the specific volume of the method can be increased by 5 μF / cm2 compared with the soft state method.
For low-voltage foils larger than 50Vf, soft high-purity aluminum foils provide a lot of conditions with different crystal plane orientations, and corroded foils with large etched holes can be obtained.
Negative electrode foil
Negative electrode foil also has a soft state and a hard state. Japan is dominated by soft electrochemical corrosion, and Western Europe is dominated by hard chemical corrosion. Both have their own advantages and disadvantages. In the soft state, high purity aluminum foil (> 99.85%) is used without copper, which is of high quality and high cost. In the hard state, low purity copper-containing aluminum foil is used. To improve. In order to develop low-cost copper-free or low-copper negative electrode foils with moderate electrostatic capacity, alloys such as AL-Fe and AL-Mg can be used.

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