Curated with aloha by
Ted Mooney, P.E. RET
The authoritative public forum
for Metal Finishing 1989-2025
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Electrochemically etching Paliney without cyanide
Q. Does anyone know how to electrochemically polish or etch Paliney (Composition: Palladium 34.99%, Silver 30.53%, Platinum 10.36%, Gold 9.90%, Copper 13.96%, Zinc 0.85%) without using cyanide in the etching solution?
Setve NeelyProbe needle manufacturer - Boulder, Colorado, USA
2005
Q. Count me in, as I have a problem etching Paliney material too. Thanks a million in advance!
ChengGhee Ong- Singapore
2005
adv.
We have method of non-cyanide polishing of Silver, Palladium, Platinum, Gold. Since this alloy is a single-phase alloy, it is possible all these metals together in alloy composition. You can send us samples for testing.
Anna Berkovich
Russamer Lab
Pittsburgh, Pennsylvania
2005
Q. Issue on etching of Paliney 7 on base metal.
Leong chongwaianacast engrg & Trading - Singapore
2007
Gold Plating Paliney 7
Q. I am trying to gold plate Paliney 7 pins that are sealed into a part. Paliney 7 is 10% gold, 30% silver, 10% platinum, 35% palladium, 14% copper and 1% zinc. As you can imagine, it is a super passive pin material and activation has been the issue.
I am using a sodium fluoride activation, rinsing and then applying a constant 5V in an acid gold strike bath. From there I continue as normal to achieve the final gold plating.
I have done several tests trying different combinations of 17% HCL, 10% sulfuric acid and the sodium fluoride activation. I have gotten to the point where I can produce a beautiful looking part that passes a tape test, but the customer requires a bend test. I bend the pins and the plating immediately peels down to the base material.
I am at a loss and I don't know to obtain the adhesion I need.
Chemical Plating Process Engineer - Laurens, South Carolina
May 30, 2018
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