Yellow Chromating
Yellow chromating
Yellow chromating is a chrome (VI)-rich chromating layer for aluminium components, also known under the trade name of Aludine or Iridite.
The yellow chromating process is a chemical surface treatment/conversion-covering that preserves and supplies the surface with new chemical and technical properties.
Advantages:
- Partial corrosion protection
- Especially good adherence ability
- Is not damaged when bent, etc.
- Temperature-resistant up to approx. 130 °C
- The chromating layer is insoluble in water and organic solutions – but can be dissolved in strong acids and alkalis.
- Weak electric resistance that does not influence welding options, for example
Application:
- Instruments, office equipment, electronics, etc.
Structure and appearance after treatment:
- The impression of metal is retained
- The chrome layer is light to dark yellow
- The surface takes on an appearance according to the treatment chosen
Layer thickness:
- The layer thickness is typically around 1-3 my depending on the treatment time
- The weight of the layer is around 0.1 to 1 g/m2
Colouring:
- Cannot be coloured
Alloys:
- The majority of alloys can be used
Standards
Yellow chromating fulfils the requirements:
- MIL-C-5541
- AMS-2473
- DIN 50939
Aludine and Iridite are recorded on the QPL list.