Object's details: Structural analysis and corrosion studies on an ISO 5832-9 biomedical alloy with TiO2 sol–gel layers

Provider:Repozytorium Uniwersytetu Łódzkiego

Description

Title:
Structural analysis and corrosion studies on an ISO 5832-9 biomedical alloy with TiO2 sol–gel layers
Creator:
Burnat, Barbara;
Blaszczyk, T.;
Dercz, G.
Contributor:
Burnat B., Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Lodz;
Blaszczyk T., Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Lodz;
Dercz G., Institute of Materials Science, University of Silesia,;
burnat@chemia.uni.lodz.pl
Description:
The aim of this study was to demonstrate the relationship between the structural and corrosion properties of an ISO 5832-9 biomedical alloy modified with titanium dioxide (TiO2) layers. These layers were obtained via the sol–gel method by acid-catalyzed hydrolysis of titanium isopropoxide in isopropanol solution. To obtain TiO2 layers with different structural properties, the coated samples were annealed at temperatures of 200, 300, 400, 450, 500, 600 and 800 C for 2 h. For all the prepared samples, accelerated corrosion measurements were performed in Tyrode’s physiological solution using electrochemical methods. The most important corrosion parameters were determined: corrosion potential, polarization resistance, corrosion rate, breakdown and repassivation potentials. Corrosion damage was analyzed using scanning electron microscopy. Structural analysis was carried out for selected TiO2 coatings annealed at 200, 400, 600 and 800 C. In addition, the morphology, chemical composition, crystallinity, thickness and density of the deposited TiO2 layers were determined using suitable electron and X-ray measurement methods. It was shown that the structure and character of interactions between substrate and deposited TiO2 layers depended on annealing temperature. All the obtained TiO2 coatings exhibit anticorrosion properties, but these properties are related to the crystalline structure and character of substrate–layer interaction. From the point of view of corrosion, the best TiO2 sol–gel coatings for stainless steel intended for biomedical applications seem to be those obtained at 400 C.;
This study was supported by Grant No. N N507 501339 of the National Science Centre. The authors wish to express their thanks to J. Borowski (MEDGAL, Poland) for the Rex 734 alloy.
Object availability:
free access
Rights:
Uznanie autorstwa 3.0 Polska;
http://creativecommons.org/licenses/by/3.0/pl
Date:
2015.10.21;
2013.11.23
Type:
Article
Language:
English
Format:
application/pdf
Publisher:
Springer
Relation:
Journal of Materials Science: Materials in Medicine;2014;
25
Identifier:
1573-4838;
http://hdl.handle.net/11089/12754 ;
10.1007/s10856-013-5099-7
Data provider:
Repozytorium Uniwersytetu Łódzkiego

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