Abstract：During the determination of hot galvanizing alloyed layer by X-ray fluorescence spectrometry (XRF), the intensity of characteristic spectral line of ZnKβ or FeKα varied with the change of Fe content in alloyed layer, leading to the deviation of analysis results of coating mass. In experiments, the coating mass of alloyed hot galvanizing sheet sample was determined by X-ray fluorescence spectrometry and gravimetric method, respectively. The influence of Fe content on the coating mass determined by X-ray fluorescence spectrometry was verified. The regression relationship between Fe content and analysis result difference of two testing methods was established. The deviation of coating mass determined by X-ray fluorescence spectrometry was corrected using w=(wFe-10.81)/0.9960+w′ (where, w was the coating mass after correction; wFe was the Fe content, %; w′ was the coating mass determined by X-ray fluorescence spectrometry before correction). The results showed that the determination of alloyed coating mass by X-ray fluorescence spectrometry could meet the precision requirements when the mass fraction of Fe was controlled in range of 8%-12%. The results were acceptable. When the mass fraction of Fe was less than 8% or higher than 12% (w(Fe)＜8% or w(Fe)＞12%), the deviation of coating mass in alloyed hot galvanizing steel sheet caused by the variation of Fe content could be corrected by regression equation theory. Thus the analysis accuracy could be improved. The coating mass in alloyed hot galvanizing steel sheet with different Fe contents was determined. The results indicated that the measured results after correction were consistent with those obtained by gravimetric method.
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