Gold Stains

Ask an Expert From: Products Finishing,

Posted on: 5/1/2005

Question: Our company plates electronic components made of silver.


Our company plates electronic components made of silver. The parts are nickel flashed and then plated with gold. We find that after a couple of days the gold becomes discolored. Do you have any ideas as to what might be wrong? C. M.


Assuming your plating baths are all in good shape and not contaminated, the most likely cause of the staining is the nickel barrier layer. Nickel barrier layer is oblique in or it is porous. In this will allow the silver to believe room and cause the staining of the gold layer. Try using a heavier nickel flash.

One other possibility is that your nickel plating tank may be contaminated with copper.

Comments are reviewed by moderators before they appear to ensure they meet Products Finishing’s submission guidelines.
blog comments powered by Disqus

Learn More


Supplier Categories

Technic Inc
Luster-On Products

Suppliers | Products | Experts | News | Articles | Calendar | Process Zones

The Voice of the Finishing Industry Since 1936 Copyright © Gardner Business Media, Inc. 2016

Subscribe | Advertise | Contact Us | All Rights Reserved