Platinised Titanium
Platinised titanium anodes combine the excellent electrochemical characteristics of platinum with the good corrosion qualities of titanium. They are characterised by the following features and provide advantages over soluble anodes and lead anodes:
- Flexible, application-specific design
- Production of complex shape anodes
- Energy saving potential
- Low weight (in particular expanded metal anodes)
- Long service time even at high current density
- Dimensional stability, long durability of base material
- Replating possible
- Homogeneous deposition, higher quality of end product
Such anodes consist of a titanium based material in the form of expanded metal, sheet, rod, wire, or pipe. The standard platinum layer thickness is 2 - 5 µm, in case of higher loads layer thickness of up to 20 µm. The lifetime of platinised titanium anodes is in particular dependent on the work medium (electrolyte) and the anodic current (specific current density).
It should not exceed 75 A/dm2. The platinum wear is low under these conditions and the lifetime of the anode is calculable. According to experience, it is approx. 1-4 g platinum per one million ampere hours in fluoride-free chromium baths. In case of specific current densities of over 75 A/dm2 or upon the use of baths containing fluoride, we recommend the use of platinised niobium anodes (see "Platinised Niobium Anodes").
Overview of the specifications – Platinised titanium anodes
| Base material: | Titanium |
| Material quality: | Grade 1 (DIN 3.7025) or grade 2 (DIN 3.7035) |
| Shape of base material: | Expanded metal, sheet, pipe, rod, wire |
| Size and construction: | Customer specific |
| Pt-layer thickness: | 2 - 20 µm / standard: 2 - 5 µm |
| Coating methods: | Aqueous bath / Molten salt electrolysis / Pyrolytic deposition |
| Specific current density: | max. 75 A / dm2 |
| Type of application: | Anode / bipolar electrode |
| pH-value: | 0 - 11 |
| Bath temperature: | max. 60 °C |
Platinised titanium anodes are very frequently used as expanded metal anodes due to their excellent pratice characteristics (high throwing power, good electrolyte exchange, compact construction, low weight etc.).
Standardly METAKEM offers the following titanium mesh types:
Contact us. We will be glad to assist you regarding your specific application.
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