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Influence of the morphological texture on the low wear damage of paint coated sheets

Article dans une revue avec comité de lecture
Author
HENNEBELLE, François
11230 Laboratoire de Métallurgie Physique et Génie des Matériaux [LMPGM]
NAJJAR, Denis
11230 Laboratoire de Métallurgie Physique et Génie des Matériaux [LMPGM]
BIGERELLE, Maxence
11230 Laboratoire de Métallurgie Physique et Génie des Matériaux [LMPGM]
IOST, Alain
11230 Laboratoire de Métallurgie Physique et Génie des Matériaux [LMPGM]

URI
http://hdl.handle.net/10985/9865
DOI
10.1016/j.porgcoat.2006.02.005
Date
2006
Journal
Progress in Organic Coatings

Abstract

The influence of the morphological texture (flat and structured) of a polyester based paint coating on the low wear damage is characterised by means of roughness and gloss measurements. Using statistical methods, the aim of the investigation is to determine, among about 60 surface roughness parameters, the most relevant of them with regard to the morphological texture and the wear behaviour of polymer coatings. The level of relevance of each roughness is quantitatively assessed through the calculation of a statistical index of performance determined by combining the two-way analysis of variance (ANOVA) and the computer based Bootstrap method (CBBM). For the experimental conditions related to the present investigation, the fractal dimension and a roughness parameter directly related to the number of inflexion points of the profiles are shown to be the most relevant parameters for discriminating the different morphological textures of studied coatings and for characterising the low wear damage, respectively. Even if the gloss reduction related to the low wear damage is more visually perceptible at a macroscopic scale for the flat products than for the structured ones, the magnitude of this damage is shown to be however very similar at a microscopic scale whatever the morphological texture of the paint coatings.

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