Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications

Gugelmin, Bruno Schneider; Ponte, Haroldo de Araújo; Marino, Cláudia Eliana Bruno

doi:10.1590/1516-1439.201514

Cited by 16 publications

(7 citation statements)

References 34 publications

(53 reference statements)

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“…Gugelmin and associates [24] have investigated the stability of thin titanium dioxide grown by the potentiodynamic method on Ti-6Al-4V surfaces up to 5.0 V in phosphate buffered solution (PBS) and artificial blood media at different immersion times. Electrochemical impedance spectroscopy (EIS) measurements have shown the lower polarization resistance after 30 days of immersion in artificial blood, which is explained by the spontaneous oxide dissolution.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behaviour of Ti and Ti-6Al-4V Alloy in Phosphate Buffered Saline Solution

et al. 2021

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The electrochemical behavior of commercially pure titanium (CP Ti) and Ti-6Al-4V (Grade 5) alloy in phosphate buffered saline solution (PBS, pH = 7.4) at 37 °C (i.e., in simulated physiological solution in the human body) was examined using open circuit potential measurements, linear and potentiodynamic polarization and electrochemical impedance spectroscopy methods. After the impedance measurements and after potentiodynamic polarizationmeasurements, the surface of the samples was investigated by scanning electron microscopy, while the elemental composition of oxide film on the surface of each sample was determined by EDS analysis. The electrochemical and corrosion behavior of CP Ti and Ti-6Al-4V alloys is due to forming a two-layer model of surface oxide film, consisting of a thin barrier-type inner layer and a porous outer layer. The inner barrier layer mainly prevents corrosion of CP Ti and Ti-6Al-4V alloy, whose thickness and resistance increase sharply in the first few days of exposure to PBS solution. With longer exposure times to the PBS solution, the structure of the barrier layer subsequently settles, and its resistance increases further. Compared to Ti-6Al-4V alloy, CP Ti shows greater corrosion stability.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Behaviour of Ti and Ti-6Al-4V Alloy in Phosphate Buffered Saline Solution

et al. 2021

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“…[ 22 23 ] In addition, crystal structures of titanium oxide found on titanium surface after anodization[ 24 25 ] allowed formation of calcium-phosphate in Hank's solution with ion concentrations approximating those of human blood plasma. [ 26 ]…”

Section: Discussionmentioning

confidence: 99%

Effect of anodization and alkali-heat treatment on the bioactivity of titanium implant material (an in vitro study)

Abdelrahim

Badr

Baroudi

2016

J Int Soc Prevent Communit Dent

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Objective:This study was aimed to assess the effect of anodized and alkali-heat surface treatment on the bioactivity of titanium alloy (Ti-6Al-4V) after immersion in Hank's solution for 7 days.Materials and Methods:Fifteen titanium alloy samples were used in this study. The samples were divided into three groups (five for each), five samples were anodized in 1M H3PO4 at constant voltage value of 20 v and another five samples were alkali-treated in 5 M NaOH solution for 25 min at temperature 60°C followed by heat treatment at 600°C for 1 h. All samples were then immersed in Hank's solution for 7 days to assess the effect of surface modifications on the bioactivity of titanium alloy. The different treated surfaces and control one were characterized by X-ray diffraction, atomic force microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Fourier transformation infra-red spectroscopy. Statistical analysis was performed with PASW Statistics 18.0® (Predictive Analytics Software).Results:Anodization of Ti-alloy samples (Group B) led to the formation of bioactive titanium oxide anatase phase and PO43− group on the surface. The alkali-heat treatment of titanium alloy samples (Group C) leads to the formation of bioactive titania hydrogel and supplied sodium ions. The reaction between the Ti sample and NaOH alkaline solution resulted in the formation of a layer of amorphous sodium titania on the Ti surface, and this layer can induce apatite deposition.Conclusions:The surface roughness and surface chemistry had an excellent ability to induce bioactivity of titanium alloy. The anodization in H3PO4 produced anatase titanium oxide on the surface with phosphate originated from electrolytes changed the surface topography and allowed formation of calcium-phosphate.

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“…Scientific literature presents polarization resistance values in biological media analysis of the order of around 10 3 Ω • cm 2 for Cr-Co alloys and some stainless steels [36]. This indicates that the Ti-40Nb alloy presents similar behavior to titanium and to commercial Ti-6Al-4V alloy [40][41][42].…”

Section: Electrochemical Stability and Corrosion Resistancementioning

confidence: 91%

“…A less noble OCP in the alloy could be obtained because of the cooling process employed in the preparation of the alloy, which produces α″ phase [17] and causes less corrosion resistance [32]. Thermodynamical stability of Ti-40Nb alloy in artificial blood can be compared to the commercial Ti-6Al-4V alloy, for which the OCP' is around −500 mV [31,33].…”

Section: Electrochemical Stability and Corrosion Resistancementioning

confidence: 99%

Electrochemical stability of binary TiNb for biomedical applications

Leiva

Kuromoto

Claro

et al. 2017

Mater. Res. Express

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Electrochemical Stability and Bioactivity Evaluation of Ti6Al4V Surface Coated with Thin Oxide by EIS for Biomedical Applications

Cited by 16 publications

References 34 publications

Electrochemical Behaviour of Ti and Ti-6Al-4V Alloy in Phosphate Buffered Saline Solution

Electrochemical Behaviour of Ti and Ti-6Al-4V Alloy in Phosphate Buffered Saline Solution

Effect of anodization and alkali-heat treatment on the bioactivity of titanium implant material (an in vitro study)

Electrochemical stability of binary TiNb for biomedical applications

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