finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsBooksHelpWantedAdvertiseForum
topic 6329

Plating density tests


(2000)

Q. I am an engineer involved in mechanical equipment wear applications. Applications involve high g processing speeds in an abrasive environment. I have been conducting wear resistance tests of chrome plated steel coupons based on weight loss and the results are very erratic. After making numerous measurements, it appears the specific gravity of the plating layer is highly variable. This same test was ran with nickel plated coupons and the results were similarly disparate. Is this a known phenomenon? If so, can it be correlated to wear properties? Any insight you may have would be much appreciated. I am snatching my hair out and I don't have that much to spare.

Gary C [last name deleted for privacy by Editor]
- St Louis, Missouri


(2000)

A. I can't comment on wear resistance testing, but I have worked with "calibrated coupons" in corrosion testing. Some corrosion tests are supposed to be "calibrated" using special coupons which are weighed before and after testing. This method never has worked for us in calibrating salt spray machines, and I have heard that others have had the same experience.

This does not directly apply to your case, but it does show how things may simply not work even though it is "supposed to." Weight loss can be a variable thing.

tim neveau
Tim Neveau
Rochester Hills, Michigan


March 7, 2015

A. There is a change in plating density of platinum on rectangular test tabs in the corners versus the center of the tab. In my experience, local areas of high current density plate at a different mass density than areas with a lower current density. So features play a role in the consistency of the mass density.

Susan Yip
- Phoenix, Arizona



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

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 ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.