Corrosion properties of Ca-doped TiO2 coatings

• Autorzy: Burnat B. , Robak J. , Leniart A. , Skrzypek S. , Brycht M.
• Konferencja: 24th Conference on Biomaterials in medicine and veterinary medicine : 9--12 October 2014, Rytro, Poland
• Języki publikacji: EN

Abstrakty

EN

The paper presents the preparation and characterization of TiO2 coating doped with Ca produced by the sol-gel method using titanium alkoxide as the precursor of titania as well as calcium nitrate as dopant source. These coatings were used to modify the biomedical alloy M30NW. Using the optical microscopy and the atomic force microscopy the topography of synthesized coatings was characterized. Whereas using electrochemical methods the corrosion measurements were carried out. Anticorrosion properties of calcium-doped TiO2 coating were determined in PBS solution on the basis of corrosion potential Ecor, polarization resistance Rp, corrosion rate CR, current density in the passive range i0.5 and also breakdown Eb and repassivation Erep potentials. Analogous corrosion tests were also made for the uncoated alloy as well as for alloy coated with pure TiO2 coating. It was stated that modification of M30NW alloy surface by calcium-doped TiO2 coating shows anticorrosion properties in PBS solution. These properties are slightly lower compared to a pure TiO2 coating. The analysis of the topography of TiO2-based coatings showed that calcium doping increases the surface development and roughness of the obtained coatings.

Słowa kluczowe

EN

biomaterials; surface modification; sol-gel method; doping; corrosion

• Wydawca: Polish Society for Biomaterials in Cracow
• Czasopismo: Engineering of Biomaterials
• Rocznik: 2014
• Tom: Vol. 17, no. 128-129
• Strony: 100--102
• Opis fizyczny: Bibliogr. 8 poz., tab., wykr., zdj.

Twórcy

autor

Burnat B.

• University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, 12 Tamka Str., 91-403 Lodz, Poland

autor

Robak J.

• University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, 12 Tamka Str., 91-403 Lodz, Poland

autor

Leniart A.

• University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, 12 Tamka Str., 91-403 Lodz, Poland

autor

Skrzypek S.

• University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, 12 Tamka Str., 91-403 Lodz, Poland

autor

Brycht M.

• University of Lodz, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, 12 Tamka Str., 91-403 Lodz, Poland

Bibliografia

• [1] Siva Rama Krishna D., Sun Y., Thermally oxidised rutile-TiO2 coating on stainless steel for tribological properties and corrosion resistance enhancement, Applied Surface Science, 252 (2005) 1107–1116.
• [2] Shen G.X., Chen Y.C., Lin C.J., Corrosion protection of 316 L stainless steel by a TiO2 nanoparticle coating prepared by sol–gel method, Thin Solid Films, 489 (2005) 130–136.
• [3] Shan C.X., Hou X., Choy K.-L., Corrosion resistance of TiO2 films grown on stainless steel by atomic layer deposition, Surface & Coatings Technology, 202 (2008) 2399–2402.
• [4] Krupa D., Baszkiewicz J., Sobczak J.W., Biliński A., Barcz A., Modifying the properties of titanium surface with the aim of improving its bioactivity and corrosion resistance, Journal of Materials Processing Technology, 143–144 (2003) 158–163.
• [5] Krzak-Roś J., Filipiak J., Pezowicz C., Baszczuk A., Miller M., Kowalski M., Będziński R., The effect of substrate roughness on the surface structure of TiO2, SiO2, and doped thin films prepared by the sol–gel method, Acta of Bioengineering and Biomechanics, 11 (2009) 21-29.
• [6] ISO Standard 5832-9:2007 Implants for surgery - Metallic materials - Part 9: Wrought high nitrogen stainless steel
• [7] Burnat B., Błaszczyk T., Leniart A., Scholl H., The effect of TiO2 sol-gel layers on corrosion properties of M30NW biomedical alloy in 0.9% NaCl solution, Engineering of Biomaterials, 106-108 (2011) 133-139.
• [8] ASTM G 102-89:2004 Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements

Uwagi

EN

The investigations were supported by grant UŁ 506/1118. The M30NW biomedical alloy was bought from MEDGAL (Bialystok, Poland).