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Electrochemical Evaluation of Protective Properties of One-component SiO2 and TiO2 Coatings Obtained by the Sol-gel Method
E. Szałkowska1, J. Masalski2, J. Głuszek2
1Department of Chemistry, Częstochowa University of Technology, Częstochowa, Poland
2Institute of Inorganic Technology and Mineral Fertilizers, Wrocław University of Technology, Wrocław, Poland
CeMn/AlSiO Ceramic Layers on Metallic Supports for High-temperature Catalytic Processes
W. Tylus
Institute of Inorganic Technology and Mineral Fertilizers, Wrocław University of Technology, Wrocław, Poland
The Effect of Sequence of Sol-gel Multilayer Coatings Deposition on Corrosion Behaviour of Stainless Steel 316L
J.G. Chęcmanowski, J. Głuszek, J. Masalski
Institute of Inorganic Technology and Mineral Fertilizers, Wrocław University of Technology, Wrocław, Poland
Abstract
The possibility of producing protective coatings by the sol-gel process is discussed. Metaloorganic complexes open new possibilities for the syntheses of ceramic materials. The most important applications of Si alkoxides for the synthesis of inorganic-inorganic composites are presented. The SiO2 protective coatings on surgical stainless steel 316L have been synthesized by the sol-gel techniques. The multi-layer coatings were deposited by the dip method using sols containing appropriate molar ratios of the precursor (tetraethoxysilan), anhydrous ethanol, nitric acid and acetic acid. Nanosilica with the surfactant didodecyldimethyl- ammonium bromide were added to the sols applied. Coatings were annealed from 200 °C to 300 °C. The electrochemical characterization by dc measurements of the protective coatings in Ringer s solutions is reported. The coatings performance has been compared using polarization characteristics. Two arbitrarily chosen values were taken: the current density at -750 mV and the potential corresponding to the current density of 2 μA/cm2. The coatings were chosen and ranked with regard to additional parameters: the polarization resistance and the through-coating porosity. It has been established that the way of applying of the coatings had an influence on the protective properties. The best protective properties have the coatings obtained from sols consisting of three SiO2 layers with nanosilica and three SiO2 layers without nanosilica. The positive effect of nanosilica on the protective properties of the coatings was determinated. Small changes in the preparation process can often have disproportionate large effects on the quality of the coatings.
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Download article (PDF)Behaviour of Glucose Oxidase During Formation and Ageing of Silica Gel Studied by Fluorescence Spectroscopy
M. Przybyt
Institute of General Food Chemistry, Department of Biochemistry and Food Science, Technical University of Łódź, Łodź, Poland
Potentiometric Tungsten Electrodes with Enzymes Immobilised by the Sol-gel Technique
M. Przybyt
Institute of General Food Chemistry, Department of Biochemistry and Food Science, Technical University of Łódź, Łódź, Poland
Application of The Sol-gel Method to the Synthesis of Ferroelectric Nanopowders (Pb1-xLax)(Zr0.65Ti0.35)1-0.25xO3, 0.06=< x =<0.1
M. Płońska, D. Czekaj, Z. Surowiak
University of Silesia, Faculty of Engineering, Department of Materials Science, Sosnowiec, Poland
Application of the Sol-gel Method to Deposition of Thin Films
A. Zarycka, J. Ilczuk, D. Czekaj
University of Silesia, Faculty of Engineering, Department of Materials Science, Sosnowiec, Poland
Crystallization of TiC and TiN from a Colloidal System
A. Biedunkiewicz
Institute of Materials Engineering, Technical University of Szczecin, Szczecin, Poland
Silicate Solvated by an Organic Solvent as Electrolyte or Electrode Material
M. Opallo
Institute of Physical Chemistry, Polish Academy of Sciences, Warszawa, Poland
Synthesis of Nanosilica by the Sol-gel Method and Its Activity Toward Polymers
J. Chruściel, L. Ślusarski
Institute of Polymers, Technical University of Łódz, Łódz, Poland
Microstructure and Optical Properties of Methylmethacrylate-modified Silica Hybrid Glasses and Thin Films
M. Nocuń1, E. Leja2, W. Bugajski1
1AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Kraków, Poland
2AGH University of Science and Technology, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics, Kraków, Poland
Rheology of Silica Suspensions Stabilized by Ethylenediamine
V.E. Gaishun1, Y.A. Potapenok1, O.I. Tulenkowa1, S.V. Pakhovtchyshin2, W. Stręk3
1Francisk Skorina Gomel State University, Gomel, Belarus
2Institute of Surface Chemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine
3Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland
EPR Studies of Defects in Pure Sol-gel Matrices and Their Influence on Cytotoxicity of the Material
A. Ulatowska-Jarża1, M. Komorowska2, H. Podbielska2
1Bio-Optics Group, Institute of Physics, Wrocław University of Technology, Wrocław, Poland
2Biophysics Group, Institute of Physics, Wrocław University of Technology, Wrocław, Poland
Silica Gel Glasses After Laser Irradiation
S.V. Shalupaev, A.V. Semchenko, Y.V. Nikityuk
Gomel State University, Gomel, Belarus
