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XRF analysis of Zn–Fe alloy coatings by using measurements at two take‐off angles
Author(s) -
Kataoka Y.,
Kohno H.,
Furusawa E.,
Mantler M.
Publication year - 2007
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.953
Subject(s) - coating , spectrometer , materials science , alloy , mass spectrometry , analytical chemistry (journal) , intensity (physics) , metallurgy , optics , composite material , chemistry , chromatography , physics
For the analysis of Fe concentrations and coating weights of galvanneal coated sheet steel, a multichannel x‐ray spectrometer with two element channels featuring a low and a high take‐off angle for Zn K as well as Fe K lines has been developed. For the quantification of coating weights and Fe concentrations a new thin‐film fundamental parameter method has been developed that allows the use of intensity ratios of the Zn K to Fe K lines, for the low as well as the high take‐off angle. The accuracy for Fe concentrations obtained in galvanneal sheet steel coatings is 0.28 mass% and therefore satisfactory for the intended practical application. Among the additional useful features of the spectrometer and the developed fundamental parameter method is the possibility to simultaneously analyze the coating weight of pretreatment layers, such as phosphate, on the Zn‐Fe alloy coating. Copyright © 2007 John Wiley & Sons, Ltd.