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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
(ed. update July, 2025: sorry, Anna has retired)
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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