Platinised anodes comprise a titanium substrate with a very thin platinum coating.
Titanium forms the body and conductor, while platinum is the active anode material. Substrates can be rods, tubes, mesh and other shapes. The usual platinum thickness is approximately 2.5 microns, increasing to around 5 microns in harsher environments.
Platinum thickness and output current density determine service life. In chloride-containing environments, anode-to-environment interface voltage must not exceed 8 V because higher voltage can cause localised corrosion at uncoated areas. Platinised anodes must not be used in fluoride-containing environments because titanium oxide dissolves and anodic passivation cannot protect the substrate.
Current Density and Consumption Rate of Platinised Anodes
| Properties | Value |
| Maximum output current density | 3000 A/m² |
| Typical output current density | 100 – 1000 A/m² |
| Consumption rate | 0.01 g/A.Year (550 A/m²Current density) |
The main advantage is operation at high current density with very low consumption. These anodes are also lighter and smaller than conventional anodes.
Borna Electronic can supply platinised anodes to meet customer requirements or project needs.