Diamond anodes – consisting of a conducting substrate material (metal sheet or expanded metal) and thin polycrystalline diamond layer – are becoming more and more established in the areas of water disinfection, waste water treatment and electrochemical synthesis.
Due to high oxygen over voltage, OH radicals, ozone or per-compounds (persulphate, peracetic acid etc) are produced on the diamond layers. These on the other hand destroy organic compounds and cyanide among other things due to their high oxidation power and therefore support the COD (Chemical Oxygen Demand) reduction of the water to be treated.
Diamond anodes should be operated under ideal electrolysis conditions. Frequently they can be easily built into existing electrolysis cells for the precipitation of metals. Therefore, both processes – metal separation/precipitation and organic decomposition – can be conducted simultaneously in one system.
The diamond anode is generally characterised by excellent wear resistance – also under very sophisticated chemical conditions – and is therefore also an interesting alternative from an economical point of view.
| Base material: | niobium (standard) tungsten, tantalum, graphite, silicon, silicon carbide |
| Thickness of base material: | 0,7 – 30,0 mm / standard: 2,0 mm |
| Size + Form: | customer-specific up to 500 x 1000 mm |
| Diamond layer thickness: | 1-20 µm / standard: 5 µm coated on one or both sides |
| Boron doping level: | 2000 – 4500 ppm |
| Resistivity: | 10 – 100 mΩcm |
| Current density: | max. 500 mA / cm2 |
| Operating conditions: | anode / cathode / bipolar electrodes stable against acids, bases, alcohols, oils, complexing agents, aromatics. |
| pH-value: | 0 – 11 |
| Bath temperature: | max. 60 °C |
Product specifications on request.
