Self-Study Program

11
In addition these parts are coloured with a
green lubricant on an alkyd resin basis to
provide a clear distinction to normal
fastening components.
Threaded connections on the Audi A2.
All fastening components that come into
contact with aluminium are coated with
Dacromet, Delta Tone or a similar coating to
prevent contact corrosion.
Available coatings for prevention of contact
corrosion
1. coatings containing zinc and
aluminium dust
(Delta Tone
®
, Dacromet
®
)
2. special zinc alloy coatings
(Zn/Sn mechanically or ZnNi by
electroplating)
3. galvanised aluminium coatings
4. zinc coatings
(for non-ferrous metals)
5. Duplex systems
(zinc + paint)
SSP239_005
SSP239_006
Surface protection