The sandblasting is a surface treatment that permit to modify the external characteristics of conductor. We can use different kind of sand (corundum or steel) and different mesh. After the treatment the surface will be rough and the improvements will be:
- increasing in emissivity, i.e. more ampacity at the same operating temperature
- the surface become hydrophilic, you will find a reduction of corona effect.
This treatment is possible for HTLS and conventional conductors