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Metal surfaces, both coated and bare, are exposed to environments which bring about the deterioration of surface layers or protective coverings. Increased knowledge of the mechanisms of erosion would make it possible to optimise materials and surface treatments. Raman spectrometry, by identifying products formed at different stages in the erosion process, makes it possible to study chemical and electrochemical reactions taking place on the interfaces. Since this technique can be used in situ the information obtained accurately reflects the actual changes taking place on the surface as the process occurs. This study concentrates on the erosion process in coated steel, given the difficulties of in situ studies on passive layers of stainless steel. Oxidation of heated rolling mill cylinders was also examined. For each study researchers established a reference spectrum of compounds which might be observed. Study of Raman analysis was coupled with electrochemical methods, which could also be used in situ. Various spectro-electrochemical cells allowing in situ analysis were developed. The results obtained demonstrated that a combination of techniques led to a better understanding of the mechanisms of the erosion process

Additional information

Bibliographic Reference: EUR 18775 FR (1999) 45pp
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-5288-1
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