Electrochemical and XPS studies of titanium for biomaterial applications with respect to the effect of hydrogen peroxide

Abstract

Electrochemical measurements, x-ray photoelectron spectroscopy, and scanning tunneling microscopy have been used to study the effect of hydrogen peroxide on the passivity of titanium in a phosphate-buffered saline (PBS) solution. The results indicate that the passive film formed in the PBS solution--with and without addition of H2O2--may be described with a two-layer structure model. The inner layer has a structure close to TiO2 whereas the outer layer consists of hydroxylated compounds. The introduction of H2O2 in the PBS solution broadens the hydroxylate-rich region, probably due to the formation of a Ti(IV)-H2O2 complex. Furthermore, the presence of H2O2 results in enhanced dissolution of titanium and a rougher surface on a microscopic scale. Finally, a dark pigmentation (blue color) is observed when titanium has been exposed--for several weeks--to PBS with additions of H2O2.

Effect of replacement of vanadium by iron on the electrochemical behaviour of titanium alloys in simulated physiological media

“…Pan et al [11] investigated the electrochemical behaviour of commercially pure titanium in phosphate-buffered saline with and without H 2 O 2 additions. Gonzalez and Mirza-Rosca [12] investigated the electroche mical behaviour of titanium and several of its alloys in Ringer's solution using the electrochemical impedance spectroscopy.…”

Discoloration of titanium alloy in acidic saline solutions with peroxide

“…Some studies using a surface reaction model have suggested that a titanium-peroxide complex is formed due to interaction with hydrogen peroxide when titanium is implanted in the human body [7][8][9] . Furthermore, the titanium surface was oxidized and dissolved by peroxide produced by bacteria and leukocytes during inflammatory reactions [10][11][12][13][14] . Similarly, in vitro studies have reported a decrease in resistance to corrosion and signs of pitting corrosion in titanium in the presence of hydrogen peroxide 6,[15][16][17] .…”

Materials Degradation Issues in the U.S. High-Level Nuclear Waste Repository

“…The influence of radiolysis on solution chemistry can be simulated by H202 additions [91,92,135,136]. Such additions lead to an increase in corrosion potential [137] and an improvement in stability of the film [91,92]. A dose rate of -lo4 ramour was shown to inhibit the propagation of crevice corrosion on the highly susceptible Ti Grade 2 [96].…”