title: The effects of a SiO2 coating on the corrosion parameters cpTi and Ti-6Al-7Nb alloy.
abstract: The aim of this paper was to evaluate the usefulness of the sol-gel method application, to modificate the surface of the Ti6Al7Nb alloy and the cpTi titanium (Grade 4) with SiO2 oxide, applied on the vascular implants to improve their hemocompatibility. Mechanical treatment was followed by film deposition on surface of the titanium samples. An appropriate selection of the process parameters was verified in the studies of corrosion, using potentiodynamic and impedance method. A test was conducted in the solution simulating blood vessels environment, in simulated body fluid at t = 37.0 ± 1 °C and pH = 7.0 ± 0.2. Results showed varied electrochemical properties of the SiO2 film, depending on its deposition parameters. Correlations between corrosion resistance and layer adhesion to the substrate were observed, depending on annealing temperature.
authors.affiliation: a Department of Biomaterials and Medical Engineering Devices; Silesian University of Technology; Zabrze, Poland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Basiaga
authors.forename: Witold
authors.initials: W
authors.lastname: Walke
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Paszenda
authors.forename: Paweł
authors.initials: P
authors.lastname: Karasiński
authors.forename: Janusz
authors.initials: J
authors.lastname: Szewczenko
mesh_terms: D001807:Blood Vessel Prosthesis; D001808:Blood Vessels / Q000503:physiopathology; D003343:Corrosion; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing / Q000379:methods; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature; D014025:Titanium / Q000737:chemistry*
chemical_list: C070282:Ti-6Al-7Nb alloy; D012822:Silicon Dioxide; D014025:Titanium
keywords: Ti-6Al-7Nb alloy; corrosion resistance; cpTi (grade 4); impedance; sol-gel method