Aloha, fun & authoritative answers -- no cost, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Home /
T.O.C. Fun
FAQs Good
Books Ref.
Libr. Adver-
tise Help
Wanted Current
Q&A's Site 🔍
Search
pub
Metal finishing Q&As since 1989

-----

Gold underplating for rhodium plating




Please tell me the recommended quality and thickness of the gold underlayer for Rhodium plating. I understand the reason for the gold underlayer (is it called "Flashing"?) is to get better adhesion of the Rhodium. If that is not the correct reason, please correct my thinking.

Rhonda Smiley
- Kansas City, Missouri, USA
 


You do not say what your application is or what metal you are trying to plate over but generally speaking gold is not used as an under plate for rhodium. There may be some particular engineering applications or special conditions where this is the specified method and the thickness would depend on those circumstances.

Neil Bell
Red Sky Plating
supporting advertiser
Albuquerque, New Mexico
redsky
 


 

I have heard of the contact points on low voltage electromechanical relays being gold plated with a flash of rhodium. In this case I believe the gold is there as the essential contact material while the rhodium is there to prevent the gold contacts from "cold welding" together. But this is only my faint recollection of the reason for the combination.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


adv.:    Discover the choice made by manufacturers
nationwide for high quality jewelry plating & finishing
red sky plating banner



(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

Disclaimer: It's not possible to fully 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 might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops Capital
Equipment Chemicals &
Consumables Consult'g, Train'g
& Software

About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"