EDP Sciences Journals List
Issue J. Phys. IV France
Volume 03, Number C9, Décembre 1993
Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température
Page(s) C9-901 - C9-908
DOI http://dx.doi.org/10.1051/jp4:1993993

Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température

J. Phys. IV France 03 (1993) C9-901-C9-908

DOI: 10.1051/jp4:1993993

Automatic evaluation of the performance of corrosion resistant LCVD silica coatings

J. Pou1, S.J. Spencer2, E. García1, D. Fernández1, P. González1, B. León1, S.R.J. Saunders2 and M. Pérez-Amor1

1  University of Vigo, Depto. Física Aplicada, Aptdo 62, 36280 Vigo, Spain
2  National Physical Laboratory, Queens Road, Teddington Middlesex, TW11 0LW, U.K.


Abstract
A new method for the automatic evaluation of the corrosion resistance of coatings is described which is based on automatic feature detection combined with chemical classification (AFDCC) using an X-ray microanalysis system and scanning electron microscope. The results of this evaluation procedure are compared with conventional gravimetric analysis, and the AFDCC method is shown to have a number of advantages : i) greater sensitivity; ii) partially coated samples can be studied ; iii) coating defect growth rate can be monitored and iv) corrosion product characterisation is an integral part of the evaluation procedure. The combination of i) and ii) rise to a rapid method for optimising coating performance and can eliminate the need for long-term testing during the optimisation phase of coating development.



© EDP Sciences 1993