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This project was concerned with evaluating the potentiality of vibrational spectroscopy for analysing industrial surfaces. These analyses are well adapted to the characterization of faults in the surfaces of sheet-steel. The intended applications are the analysis of pollution, of the products of deterioration, variations in thickness, and defective polymerization. The aim was to develop the area of application of infrared microscopy, using high performance equipment. The spectrometers used have a motorized stage, allowing maps to be made. The FTIR microscope has a low-angled lens for studying thin films. The Raman equipment is capable of laser excitation. All these experimental features were developed for metallurgical studies. The Raman spectroscopy was developed to analyse organic or inorganic chemicals on steel. The technique was applied to the determination of the local composition of galvanized, chromium-plated steels. Different areas showed evidence of different crystalline states, where amorphous and crystallized composites, about 10 microns thick, are simultaneously present. A particular experimental procedure must be followed to avoid destroying this layer with the laser beam. Profiles of the organic function of coverings a few microns thick were obtained, but the methods of preparing the samples must be improved to allow a better interpretation of the results.

Additional information

Bibliographic Reference: EUR 18612 FR (1998) 77pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-5056-0
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