Rigaku Publishes New Application Report for Measurement of Chromium Conversion Coating

Austin, TX— October 4, 2016. Applied Rigaku Technologies, Inc. has published a new application note describing the measurement of chromium (Cr) conversion coating on aluminum (Al) by energy dispersive X-ray fluorescence (EDXRF).

Rigaku EDXRF Application Note #1606 details a method for the analysis of chromium conversion coating, and demonstrates the performance of the Rigaku NEX QC+ high resolution benchtop EDXRF analyzer during the production of coated product. Information regarding sample preparation, calibration and repeatability is included.

Aluminum is often coated with a protective conversion coating to provide resistance to oxidation and corrosion of the base metal. Chromium is commonly used for such coatings, and the use of chromated aluminum covers a wide range of applications. Conversion coating also help in the retention of paint for the final finished product

The new application report presents a method which employs EDXRF spectrometry, which is shown to be an affordable means of optimizing quality while minimizing costs and reducing waste.

For the analysis, a test coupon was placed flat in the analysis chamber with the coated side facing the X-ray beam. An empirical calibration was built using a set of standards assayed by a careful weigh-strip-weigh process. The bare, uncoated aluminum sample was measured to generate a background correction. The low and high calibration standards were each measured in static position for ten repeat analyses to demonstrate precision.

The results shown in the report demonstrate that the Rigaku NEX QC+ high-resolution EDXRF analyzer provides excellent sensitivity and performance for the measurement of chromium conversion coatings on aluminum.

A copy of this report may be requested at: http://www.rigakuedxrf.com/edxrf/app-notes.html?id=1606_AppNote

For further information, contact:

Scott Fess
Product Manager
Applied Rigaku Technologies, Inc.
tel: +1. 512-225-1796
info@RigakuEDXRF.com