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Electroplating MMO Titanium Anodes


I. Iridium-Tantalum (Ir-Ta) Coated Electrode

Resistant to oxygen electrode, mainly used in oxygen evolution reaction, particularly suitable for acidic electrolytes, such as sulfuric acid electrolyte at a certain concentration. It has ultra-low oxygen evolution potential and can be used for oxygen evolution electrolysis. It is also resistant to chlorine corrosion, suitable for electrolysis involving both oxygen and chlorine evolution, such as seawater electrolysis. It is a good electrode material for oxygen evolution reaction in acidic media, with limited options available in such environments. This coated electrode has been used in organic electrolysis, such as cysteine, acetic acid, succinic acid, etc. It can be used for indirect oxidation of Cr3+ to Cr6+ in organic electrolysis, as well as for wastewater treatment to oxidize organic substances and toxic substances in water, such as the conversion of CN−. It can also be used in electroplating industries as auxiliary electrodes, such as auxiliary anodes for chromium plating and auxiliary anodes for copper electrolysis.

 

II. Ruthenium-Titanium-Iridium (Ru-Ti-Ir) Triple Coating Electrode

This coated electrode is used in electrolytes with high hydroxyl ion content, resistant to oxygen corrosion, suitable for ion membrane electrolysis.

Coating specifications:

1. Discharge potential at 4000A/m2 current density is 1.18V (S.C.E).

2. Enhanced lifespan (coating weight loss method) is 1.02mv/4 hours·cm2, with a guaranteed lifespan of over 5 years, already applied in large industrial cells.

 

III. Ruthenium-Titanium-Tin (Ru-Ti-Sn) Triple Coating Electrode

This technology has been successfully developed and has won awards from the Ministry of Chemical Industry. Coating characteristics:

1. Low chlorine evolution potential, small overpotential, chlorine gas evolution potential does not exceed 1.12V at 2000A/m2 current density, with overpotential less than 20mv.

2. Polarization rate is less than 30mv/10 units of current density.

3. Long-term enhancement lifespan in 0.5N H2SO4, 1A/cm2 current density, with a lifespan of more than 1500 minutes. All three indicators are superior to industry standards (industry standards are: potential 1.13V, polarization rate 40mv/10 units of current density, enhanced lifespan greater than 1000 minutes).

 

IV. Titanium Plated Platinum (Ti/Pt) Coated Electrode

Base metal: Gr1, Gr2, TA1, TA2

Operating current range: <2000A/m2

Temperature range: <80°C

Coating metal: Pt (99.99%)

Shape: Plate, tube, etc.

Technical features: It is an insoluble anode, the platinum coating is firmly bonded to the titanium base, with stable performance, can replace pure gold, pure platinum anodes, used in gold and other precious metal plating tanks.

Application: Acidic and alkaline electroplating solutions.

 

V. Processing Requirements for Titanium Base Materials:

Surface roughness: There is no relevant standard reference for this item, the rougher the better.

Flatness of plate-type anode surface: Thickness above 1.5 ≤ ±0.5mm/M, thickness below 1.0 ≥ ±1.0mm/M.

Straightness of tube-type anode: Wall thickness above 1.5mm ±0.5mm/M, wall thickness below 1.5mm ±1.0mm/M.

Tolerance for plate processing: The minimum can be controlled within ±0.1mm, generally delivered within ±0.5mm.

 

VI. Precautions for the Use of Titanium Anode Products:

DSA is not truly insoluble anode, it just has a lower consumption rate. Depending on the application industry and specific usage environment, our company can guarantee a service life ranging from 0.5 to 50 years.

 

1. Normal operating current density should be within 2000A/m², excessive current will cause overly intense reactions, shortening the anode lifespan.

2. The electrolyte should not contain cyanide ions or fluoride ions. These impurities will severely corrode the titanium base.

3. The distance between anode and cathode can be set according to specific conditions, generally between 5-25mm. Overall, a larger gap will increase power consumption, and it should not be too small, otherwise, cathodic scale formed on the cathode surface will easily cause short-circuiting of the electrode plate.

4. The use of current leads is strictly prohibited. Once noble metal oxide coatings are used as cathodes, reduction reactions occur on the surface, making it difficult to effectively bond with the titanium base, causing coating detachment. Periodic acid cleaning of the plate surface can be considered.

5. The working temperature of the electrolyte should not be too high, ideal temperature is 25-40°C.

6. Rinse the surface of the electrode plate with clean water when shutting down, do not immerse it in the solution for a long time without power. If conditions permit, it is best to maintain a small current of 2-5A for continuous circulation to protect the electrode plate.

7. Handle with care during installation and transportation, the coating surface must not be scratched, otherwise, local corrosion will occur quickly.


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