finishing.com -- The Home Page of the Finishing Industry

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics

World's most popular finishing site / Internet's friendliest corner

topic 38220

Electrochemically etching Paliney without cyanide


2005

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 Neely
Probe 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
Anna Berkovich
Russamer Lab
supporting advertiser 
Pittsburgh, Pennsylvania 
russamer labs banner




2007

Q. Issue on etching of Paliney 7 on base metal.

Leong chongwai
anacast engrg & Trading - Singapore

Gold Plating Paliney 7

May 30, 2018 apologies: not posted until 9/27/19

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.

Benjamin Hartford
Chemical Plating Process Engineer - Laurens, South Carolina

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread


Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental Compliance


©1995-2019 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.