Determination of metal content in industrial powder ink and paint thickness over steel plates using X-Ray Fluorescence

The Energy Dispersive X-Ray Fluorescence (EDXRF) is a well stablished technique that may be used in quality control of industrial processes. In this study, it was proposed an analysis of a two commercial powder inks widely used in the industry. The goals were to determine the composition of the ink...

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Bibliographic Details
Published in:Applied radiation and isotopes 2019-08, Vol.150, p.168-174
Main Authors: Lisboa Nogueira, Guilherme A., Parreira, Paulo S., Rodrigues dos Santos, Felipe, Melquiades, Fábio L.
Format: Article
Language:English
Subjects:
EDXRF
PLSR
RoHS
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Summary:The Energy Dispersive X-Ray Fluorescence (EDXRF) is a well stablished technique that may be used in quality control of industrial processes. In this study, it was proposed an analysis of a two commercial powder inks widely used in the industry. The goals were to determine the composition of the ink by quantifying its inorganics elements by EDXRF, and check if the amount of toxic elements matches with Restriction of Certain Hazardous Substances (RoHS) and with “Norma Brasileira” (NBR) regulations. Moreover, to build Partial Least Squares Regression (PLSR) models to predict the thickness of the ink layer applied over steel plates using EDXRF data. Evaluating the quantitative results, it was found that some samples presented toxic elements, such as Cr and Pb. The PLSR results ranged from 54 μm to 97 μm with an average relative deviation of 1% compared to the conventional method used for thickness determination (magnetic method). The results show that EDXRF is a reliable alternative technique to determine the metal elements on the powder ink composition. Furthermore, a (PLSR) model can be used to determine the thickness of the ink applied over steel plates. •Analysis of industrial powder ink composition by EDXRF.•Elemental concentration was calculated from EDXRF data.•Classification of ink due to its compliance to RoHS regulations.•PCA analysis grouped the ink type and those who fail in RoHS after industrial application.•PLSR models determined the thickness of paint layer over steel plates using EDXRF data.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2019.05.030