finishing.com -- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 33552

Need to measure chrome thickness on stainless


2004

We are a manufacturer of Coal Prep Dryers, using industrial chrome to improve the service life of our components. I need a non-destructive method to measure the depth of industrial hard chrome on 304 stainless. I have been informed that here is no way to do this. Magnetic and eddy current methods will not work, but surely someone has developed a cost effective way to do this. Any advice would be welcomed.

Thanks......

Jeremy Allen
Coal Dryer Manufacturer - Raleigh, IL, U.S.


2005

X Ray flourescence will do the job.

jeffrey holmes
Jeffrey Holmes, CEF
Spartanburg, South Carolina


2005

Hi

XRF probably won't work. Stainless is 10+% Chromium. The thickness measurement will be off because of this, maybe not by much, but it will affect the measurement. You could probably use FIB (focused ion beam) and SEM (scanning electron microscope), but your part would have to be cross-sectioned for that.

Jeff Marten
- Colorado Springs, Colorado, USA


2005

All that needs to be done is to calibrate using chrome on stainless standards.

jeffrey holmes
Jeffrey Holmes, CEF
Spartanburg,
      South Carolina


2005

Jeff, industrial hard chromium plating is about 2 mils, or 50 microns, thick. I was under the impression that such would be too thick to get an x-ray fluorescence beam through: is that not the case?

lee gearhart
Lee Gearhart
metallurgist



2005

Lee: Where does it say that hard chrome is .002" think? We plate hard chrome anywhere from .0001" to .060" I don't know what the absolute limit for XRF is, but it will certainly measure coatings .002"+.

jeffrey holmes
Jeffrey Holmes, CEF
Spartanburg,
      South Carolina


2005

I have an older EDXRF (Fischerscope 1510) and the limit for Chrome is 360u", or 0.36 mils. Maybe a WDXRF would work? I don't know a whole lot about WDXRF machines, but don't they use a flat vacuum-assist sample tray? If so would the sample need to be flat?

Jeff Marten
- Colorado Springs, Colorado, USA



If you have a question in mind which seems off topic, please Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT 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


©1995-2018 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.