The Structures and Surface Composition of Chromate Conversion Coatings: An XPS and SEM Study
- 1 January 1982
- journal article
- research article
- Published by Taylor & Francis in Transactions of the IMF
- Vol. 60 (1) , 92-96
- https://doi.org/10.1080/00202967.1982.11870613
Abstract
In order to understand the mechanisms of adhesion of paints and lacquers to pretreated surfaces, topographical studies have been made of films formed on aluminium surfaces by ferricyanide accelerated Chromate pretreatment. Detailed XPS and bulk structural analyses were also made of a film with poor cohesive strength. Pretreatment resulted in a progressive smoothing of the original highly pitted surface remaining after initial alkali cleaning. The bulk of the film with poor cohesion was found to be comprised of layers of small (30–70 nm) particles with a surface chemical composition similar to that found for material in the surface of the film and typical of this type of pretreatment film. Similar but smaller particles are probably present on the surface although they have not been clearly resolved. Adhesion promotion is most likely to be due to the general smoothing of the surface or area increases due to the particulate nature of the surface. Cohesive failure of the films is more likely to be due to structural changes in the film than chemical compositional changes.Keywords
This publication has 5 references indexed in Scilit:
- XPS studies of a ferricyanide accelerated chromate paint pretreatment film on an aluminium surfaceSurface and Interface Analysis, 1981
- Adsorption of nicotinic, picolinic, and dipicolinic acids on monodispersed sols of α-Fe2O3 and Cr(OH)3Journal of Colloid and Interface Science, 1981
- The science of adhesionJournal of Materials Science, 1980
- Oxide morphologies on aluminum prepared for adhesive bondingApplications of Surface Science, 1979
- Use of X-ray photoelectron and Mössbauer spectroscopies in the study of iron pentacyanide complexesJournal of Electron Spectroscopy and Related Phenomena, 1977