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Investigations on composition and morphology of electrochemical conversion layer/titanium dioxide deposit on stainless steel

Bamoulid, Loubna and Benoit-Marquié, Florence and Aries, Lucien and Guenbour, Abdellah and Ben Bachir, Ali and Maurette, Marie-Thérèse and Ansart, Florence and El Hajjaji, Souad Investigations on composition and morphology of electrochemical conversion layer/titanium dioxide deposit on stainless steel. (2006) Surface and Coatings Technology, vol. 2 (n° 6). pp. 2791-2795. ISSN 0257-8972

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Official URL: http://dx.doi.org/10.1016/j.surfcoat.2006.05.037

Abstract

In this study, the formation and characterization of conversion coatings modified by a sol-gel TiO2 deposit were investigated as a way to develop a new photocatalyst for water and air depollution. The conversion coating, characterised by strong interfacial adhesion, high roughness and high surface area facilitates the sol-gel deposition of titania and enhances its adhesion to the substrate. The conversion treatment is carried out in an acid solution. Observation by Scanning Electron Microscopy (SEM) reveals a rough surface with pores and cavities. According to SIMS measurements, the thickness of the initial conversion layer is evaluated at about 1.5 μm. On this pre-functionalised support, the titanium dioxide was deposited by the sol-gel method. The roughness measurements coupled with SIMS analysis allowed a precise evaluation of the surface state of the final layers. The coating consists of two layers: a TiO2 outer layer and an inner layer containing iron chromium oxides. Characterization by X-ray diffraction (XRD) showed the existence of the TiO2 anatase structure as the main compound.

Item Type:Article
Additional Information:This publication is available on http://www.sciencedirect.com/science/journal/02578972
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Université Mohammed V Agdal - Faculté de sciences de Rabat (MOROCCO)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Thomas Bonnecarere
Deposited On:05 Sep 2008 10:00

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