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A powerful modular methodology was developed for a complete characterization of the oil film on sheet steel, which allows the analysis of organic and organo-metallic compounds, salts and solid particles. The method is based on extraction with a xylene/methanol mixture and ICPMS analysis. Aerosol dissolution is a must. It can be combined seamlessly with other methods, such as DATAM, or the solid particles can be isolated instead of analysed, and characterized by scanning electron microscopy.

A variety of elements was chosen to demonstrate the application of the method in different fields. The oil film on carbon steel sheet and galvanized and stainless steel sheet was analysed, as well as bulk samples of oil, emulsion, oil relicts after a tribological experiment and Erichsen cups. Most concentrations lie in or even below the micro-g/m{2} level. Absolute quantitative detection limits in the pg-range were reached.

The method allows for total quality assurance, and the tools were generated to guarantee that customers get what they expect, for example as far as protective oil is concerned. It was proven that steel has a very environment-friendly surface: most toxic and environment-unfriendly compounds are not detected even by this extremely sensitive method, and if detected the concentrations found were extremely low. This method allows the positive compatibility of steel with nature to be proven and to make sure that customers who use steel in their products are rewarded by an easily obtained ECO-label. el.

Additional information

Authors: DILLEN H, OCAS, Zelzate (BE);TUSSET V, CRM, Liege (BE)
Bibliographic Reference: EUR 19415 EN (2001), pp. 78. Euro: 11.50
Availability: Available from EUR-OP sales agent URL:
ISBN: ISBN 92-894-1480-4
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