Authors: Kasperek, J.; Lefez, B.; Beucher, E.

Source: Applied Spectroscopy, Volume 58, Issue 2, Pages 46A-64A and 143-256 (February 2004) , pp. 179-183(5)

Publisher: Society for Applied Spectroscopy

Abstract:

This study shows the effects of roughness on infrared spectra shapes of thin corrosion products on metallic substrates. The calculated spectra show that the baseline is mainly affected by increasing roughness and that such effects do not shift the position of the absorption bands. The model obtained has been used to extract data of artificial patina on a copper surface. Surface defects of copper substrates can be distinguished on the whole surface, from the morphological and chemical points of view, using optical profilometry and infrared microspectroscopy. An homogeneous layer of cuprite covers the surface except in the linear defects. Fourier transform infrared (FT-IR) analysis indicates that a mixture of atacamite and clinoatacamite is mainly located in these scratchs. The width of these particular areas is in good agreement with profilometric observations.

Keywords: FOURIER TRANSFORM INFRARED; FT-IR MAPPING MICROSCOPY; ROUGHNESS; COPPER; ATACAMITE; CLINOATACAMITE

Document Type: Research article

DOI: http://dx.doi.org/10.1366/000370204322842904

Affiliations: 1: Institut des materiaux, LASTSM, Université de Rouen, UPRES-EA 1290, 76801 Saint Etienne du Rouvray cedex, France

Publication date: 2004-02-01

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