
-----
Chrome plating on ABS: same thicknesses as on metal?
Can anybody tell me if the plating thickness (microns) on ABS parts will be more or less than the plating thickness on Alloy parts? I have a specification for metal and I am thinking of using the same spec for my ABS plastic parts.
GRAHAM HAYWARDproduct designer - OSWESTRY, U.K.
April 12, 2011
Hi, Graham.
I wouldn't do that. Plating on ABS has thermal expansion issues that you don't have on metal, so chrome plating onto ABS usually incorporates a substantial layer of copper plating which is usually omitted in plating onto steel.
Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted can be retained for immediate
answers or long term project help
April 12, 2011
April 28, 2011
Graham,
It is not clear what your plastic components will be used for, but I suspect the chromium is purely decorative. Ted is correct about the copper interlayer, so I would suggest you metallise your ABS in the conventional way with either nickel or copper and then thicken it up with 5-10 microns of nickel or copper, followed by a decorative flash of chromium. You may prefer using nickel to copper, as it will not be so obvious if the chromium is very slightly discontinuous.

Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
Q, A, or Comment on THIS thread -or- Start a NEW Thread