Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
-----
How to properly activate white bronze plating?
October 23, 2019
Q. Dear All,
I'm plating white bronze as an underlayer for gold plating.
White bronze composition is ~ 55% Cu / 30% Sn / 15% Zn.
Sometimes, I have bad bonding between white bronze and gold, probably due to some variations of the composition of white bronze and too high content of tin.
I'm used to activating white bronze with NaHSO4 (60 g/L) with some fluoride.
What would be the best activator for white bronze alloy?
Best regards.
David
- Italy
A. Use the sodium bisulphate (or 5% sulfuric acid) without the fluoride. You do not need a fluoride with that alloy, and be sure to use a gold strike.
Robert H Probert
Robert H Probert Technical Services
Garner, North Carolina
October 24, 2019
(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)
Q, A, or Comment on THIS thread -or- Start a NEW Thread
Q, A, or Comment on THIS thread -or- Start a NEW Thread