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The basic objective of this project is to improve the process control and product quality of coil-coated products, by means of development of fast, reproducible and robust methods of coating characterisation based on fast chemical and depth profiling analysis. Of primary interest are multi-coating systems with thick organic topcoats. Examples of such coatings are polyester or epoxy urethane, PVDF and PET with various thicknesses of 5 to 30 microns. Glow discharge optical emission spectroscopy (GD-OES) has been further established as a 'reference' technique for relatively fast and well resolved chemical depth profile analysis of all coating types of interest. Investigation of molecular emission has significantly improved the ability to interpret GD-OES data. Two very fast methods with limited depth information but giving a large amount of chemical information have been developed and evaluated: laser ablation optical emission (LIBS) and modern X-ray fluorescence (XRF) systems with detectors for light elements. A more advanced laser method using a femtosecond (fs) laser combined with inductively coupled plasma mass spectrometry (ICP-MS) has also been developed. Wet chemical and combustion methods have been adopted for analysis of polymer coatings, mainly for characterisation of reference materials. An expert system based on advanced methods of computational statistics has been further developed and adapted to data from several instrumental techniques. It has been demonstrated that the expert system is capable of detecting minor but statistically significant differences in the analytical data in an automatic fashion. This will be a very useful tool both in process development and quality inspection of coated products.

Additional information

Authors: BENGTSON A, Corrosion and Metals Research Institute (KIMAB), Stockholm (SE);BJÖRK T, Corrosion and Metals Research Institute (KIMAB), Stockholm (SE);OLIVER J, Corrosion and Metals Research Institute (KIMAB), Stockholm (SE);MEILLAND R, ArcelorMittal Research, Maizières-lès-Metz (FR);ZEIMETZ E, CRM, Angleur (BE);TUSSET V, CRM, Angleur (BE);ANGELI J, voestalpine Stahl, Linz (AT);HACKL R, voestalpine Stahl, Linz (AT);HILDEBRANDT L, Universität Dortmund, Dortmund (DE);HEGENRÖDER R, ISAS, Dortmund (DE);SAMEK O, ISAS, Dortmund (DE)
Bibliographic Reference: EUR 23197 EN (2008), 105 pp. Euro: 20
Availability: Katalogue Number: KI-NA-23197-EN-S The paper version can be ordered online and the PDF version downloaded at:
ISBN: ISBN: 978-92-79-08174-3
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