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The Determination, by X-Ray-Fluorescence Spectroscopy, of Platinum-Group Elements, Iron, and Chromium in Special Corrosion-Resistant Steels

Volume 41, Number 8 (Dec. 1987) Page 1442-1444

Eddy, B.T.; Balaes, A.M.E.; Hasty, R.A.; Farrer, H.N.


The addition of platinum-group elements (PGE) in concentrations ranging from about 0.1 to 0.5% has been shown to increase the corrosion resistance of metals and alloys. However, because PGE are relatively costly, it is advantageous to produce experimental alloys in batches that are as small as possible, and nondestructive analytical methods are essential. X-ray-fluorescence spectroscopy (XRFS) is therefore one of the very few techniques that are suitable for the analysis of PGE, particularly in this application. XRFS has been extensively used for the analysis of metals and alloys. A metal disc of a sample that has been prepared for corrosion studies can be analyzed directly by XRFS without either the surface of the disc or the results of the corrosion tests being affected. The interelement-influence coefficients required for the analysis can be calculated by the use of generally available multiple-regression computer programs and are therefore not discussed here.