Concorde`s final flight :
Basic, classical course : for ABS materials
1st chrome sulphuric acid pickle with wetting agent
2nd chrome VI reduction
3rd hydrochloric acid processing
4th palladium deposition
5th accelerator - remove the protective colloids
6th electroless nickel for plastics
7th first electrolytical nickel - nickel strike
8th electrolytical bright copper
9th electrolytical bright nickel, or velour nickel, or matt nickel
electroless nickel - plastic coating
The application of a suitable
en process is next to the perfect pretreatment and a perfectly set up
basic material surface the starting point for the further coating structure.
The regular coverage of the surface
with palladium conducts deposited a layer thickness of 0,1 to 0,5 µm en.
Since these baths work between 30 ° to 45°C and pH-values of 8,0 to 10,0, the "responsible" components must be selected correspondingly.
In addition it is possible to achieve regular depositions through further additions whose hardness and
tensions are reduced.
Ammonia does not have to be always the "panacea".
There are systems which manage also without ammonia during the pH-correction.