Please use this identifier to cite or link to this item: doi:10.22028/D291-24233
Title: Sol-gel TiO2-SiO2 films as protective coatings against corrosion of 316L stainless steel in H2SO4 solutions
Author(s): Atik, Mohamed
De Lima Neto, Pedro
Aegerter, Michel A.
Avaca, Luis A.
Language: English
Year of Publication: 1995
OPUS Source: Journal of applied electrochemistry. - 25. 1995, 2, S. 142-148
SWD key words: Korrosionsschutz
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: Sol-gel TiO2-SiO2 films were deposited on 316L stainless steel by dip coating process from a sono-catalysed sol of composition 30TiO2-70SiO2 prepared from a mixture of Ti(OC2H5)4 and Si(OC2H5)4, absolute ethanol C2H5OH and glacial acetic acid CH3COOH as precursors and solvents. The films, densified at 800° C in air for 2 h, are composed of small orthorhombic titania (anatase) crystallites embedded in a SiO2 amorphous matrix as identified by X-ray diffraction. The temperature dependence of the film morphology was observed using scanning electron microscopy (SEM) and the content was determined by FTIR reflection spectroscopy. The corrosion behaviour of 316L stainless steel samples coated with densified 30TiO2-70SiO2 films was studied in 15% H2SO4 by potentiodynamic polarization curves at 25, 40 and 50°C. The measured corrosion rates show a considerable decrease for the protected steel samples in comparison to the bare substrate. The effect of time of heat treatment of the films on the corrosion parameters is also reported.
Link to this record: urn:nbn:de:bsz:291-scidok-24738
Date of registration: 27-Nov-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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