Corrosion behavior and biocompatibility of nanostructured TiO<sub>2</sub> film on Ti6Al4V

Ramji, Karpagavalli; Zhou, Anhong; Chellamuthu, Prithiviraj; Nguyen, Kytai T.

doi:10.1002/jbm.a.31447

Cited by 82 publications

(49 citation statements)

References 53 publications

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“…All compositions present passivitation over large ranges of anodic potentials; however, the high values of passive currents (>0.1 mA/cm 2 ) indicate pseudopassivity, as stated by other researchers [3,[23][24][25]. …”

Section: Corrosion Performance Of Eroded Ti6al4v Alloysupporting

confidence: 72%

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Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

Karantzalis¹

2017

Mater. Sci. Eng. Adv. Res

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The economic and effective operation of machinery and plant involved in fluids handling is increasingly dependent on the utilization of materials that combine high corrosion resistance and good wear resistance.The present study was undertaken in order to investigate the effect of solid particle erosion on the surface characteristics, the microstructure and the aqueous corrosion behavior of a Ti6Al4V sheet metal alloy. The scope of the present effort is to examine the possible way the solid particle erosion affect, by altering the Ti6Al4V surface characteristics, the subsequent electrochemical corrosion response. As for the solid particle erosion tests, three (3) different impact angles were selected, 30°, 60° and 90° degrees respectively. Angular alumina particles of 177 -250 μm size was used as the eroding media, injected, under 1 and 2 bars pressure, on the sample surface located at 10 mm distance from the injection nozzle. The mass loss was weighted and the wear rates were calculated. Surface roughness of the eroded surfaces was assessed and the microstructural modifications were evaluated using optical microscopy and SEM-EDX.Cyclic polarization measurements were conducted in an electrolyte simulating body fluids in order to ascertain the corrosion response of the surface treated samples. SEM-EDX analysis of the corroded surfaces was used in order to assess the corrosion mechanisms and the involved phenomena and to correlate them with the surface and the overall microstructural modifications.

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Section: Corrosion Performance Of Eroded Ti6al4v Alloysupporting

confidence: 72%

“…As it is mentioned above, a reason that Ti6Al4V alloy is widely used is because of its excellent corrosion resistance [22][23][24][25]. It is well known that this capacity of the alloy is effected by a surface oxide while a passive film is formed rapidly on titanium in water.…”

Section: Introductionmentioning

confidence: 99%

Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

Karantzalis¹

2017

Mater. Sci. Eng. Adv. Res

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“…A passive oxide layer of an alloy typically shows one time constant in the impedance spectrum. [3] If there are two time constants, the first one stands for the mentioned passive oxide film and the second time constant signifies a porous outer layer [3,[29][30][31][32] or a deposited film. [22] Different adsorbing layers also have different time constants.…”

Section: Fundamentalsmentioning

confidence: 99%

“…Defects of the unsealed surface are filled with electrolyte. [30][31][32]38] While the corrosion resistance is attributed to the inner layer, the ability of tissue integration should be ascribed to the porous outer layer. [39] The oxide layer capacitance C p is inversely proportional to the oxide layer thickness d = A e 0 e r /C p , with A being the oxide layer surface, e r the relative static permittivity of the oxide film, and e 0 the electric constant.…”

Section: Equivalent Circuit -Modelling the Interfacementioning

confidence: 99%

Biomaterial Interface Investigated by Electrochemical Impedance Spectroscopy

2008

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Electrochemical impedance spectroscopyElectrochemical impedance spectroscopy is an easy applicable sensitive technique. It is used to get information about the adsorption behaviour and the interactions of biomolecules with the electrode surface in a short measurement duration. Electrochemical processes can be modelled by an equivalent circuit and various parameters reflecting certain properties of the interface can be determined. The electrochemical properties of the interface are influenced by proteins and cells adsorbing at the surface. Different modified surfaces can be analyzed before, during, and after cell contact, respectively. Applying bias potentials also changes the behaviour of attaching cells and proteins. Changes in the medium composition have an influence on the electrochemically detectable surface properties.Biosensors are developed consecutively to detect biomolecules. Enzymes, lipids and membranes can be analyzed and the adsorption behaviour of DNA and antigens at modified electrode surfaces can be determined. Different technologies using microchips were constructed to allow a fast screening of electrochemical properties and discrimination of biological molecules or cells. ApplicationElectrochemical impedance spectroscopy serves not only for determination of the capacity of new battery materials or corrosion behaviour and long term stability of diverse alloys and oxide layers, it can also be used to gain information about biomolecules. The adsorption behaviour of cells [1][2][3] and proteins, [4] the amount of adsorbed proteins, [4][5][6][7] surface charge densities [4][5][6] and adsorption coefficients [5] can be determined. Interactions of implant surfaces with biological devices, changes in the polarizability of functional groups, the transport of ions or dipoles through polymer layers and mineralization processes, for instance of bone tissue can be assessed. The change of the Gibbs free energy and the entropy due to protein binding to the surface can be calculated [4,6,8] and the affinity of biomolecules to the surface can be estimated. [4] Electrochemical techniques are introduced as biosensors. Antigens, ssDNA or enzymes are immobilized at the surface and according antibodies, DNA and distinct proteins can be ADVANCED ENGINEERING MATERIALS 2008, 10, No. 10

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“…The determination of the electrochemical stability by open-circuit potential allows evaluate chemical potential of self-organized TiO 2 nanotubes layer and shows the nanotubes ability to remain stable even during days immersed in artificial blood plasma. Titanium implants with selforganized nanotubes layer as superficial treatment become more attractive if demonstrate stability in corrosive environment solution [10]. This research aimed determine potentiostatic anodization parameters to obtain self-organized TiO 2 nanotubes layer with reproducibility and ideal diameters for bioactive response on Ti -2 grade (ASTM F67) and Ti6Al4V (ASTM F136) orthopedic alloy and evaluation the electrochemical stability behavior in simulated body fluid media.…”

Section: Introductionmentioning

confidence: 99%

Growth and electrochemical stability of self-organized TiO2nanotubes on Ti-2 grade and orthopedic Ti6Al4V alloy for biomedical application

et al. 2014

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Titanium and its alloys are biomaterials used in endosseous implants, due to desirable mechanical properties, high corrosion resistance and biocompatibility. Using electrochemical anodization technique these materials can be recovered with self-organized TiO 2 nanotubes layer resulting in increased specific surface area and probable bioactivity improvement. This research aimed determine potentiostatic anodization parameters to obtain self-organized TiO 2 nanotubes layer with reproducibility and ideal diameters for probable bioactive response on Ti -2 grade (ASTM F67) and Ti6Al4V (ASTM F136) orthopedic alloy and evaluation the electrochemical stability behavior in simulated body fluid media. The self-organized nanotubes layer were obtained by potentiostatic electrochemical method in electrolyte containing fluoride ions, H 3 PO 4 /HF for Ti 2 grade and H 3 PO 4 /NH 4 F for Ti6Al4V alloy, the applied potentials were 15 V, 20 V and 25 V for 30, 60 and 90 minutes, for both materials. For morphologic characterization were employed scanning electron microscopy SEM and the Image J software for nanodiameter measurements. The nanoestructure electrochemical stability was evaluated by open circuit potential after immersion for 15, 30 and 60 days in artificial blood plasma, into an electrochemical cell, using SCE (saturated calomel electrode) as reference electrode, in PBS ((phosphate buffered saline) solution electrolyte for 90 minutes. The ideal anodization parameters were 15 V and 20 V for 1 hour and a reproducible, uniform and homogeneous self-organized nanotubes layer were obtained with ideal diameters that probably improve the implant superficial bioactivity with 80 and 120 nm respectively, according to the literature. Open-circuit potentials from metal/oxide system obtained on both materials are stable with potentials in range of -0.031 V to -0,183 V indicating good stability of nanoestructures in simulated body fluid. Nanotubes layer as a superficial treatment is viable with high reproducibility, low cost and electrochemical stability in simulated body fluid media.Keywords: biomaterial, self-organized TiO 2 nanotubes layer, electrochemical behavior Souza, M ; Oliveira, N; Kuromoto, N; Marino, C. revista Matéria, v.19, n.01, pp. 53-60, 2014. 54 INTRODUCTIONThe bioactive response from implant surface and interaction with human body is an important factor in choosing the adequate implant. Titanium and its alloys are successfully used in orthopedic implants, because they have excellent mechanical properties and corrosion resistance. Better implant superficial condition leads to enhance interaction bone/implant and, metal surface coating with self-organized TiO 2 nanotubes layer as superficial modification, increase specific implant superficial area, improving osseointegration; and reducing time to forming neo bone [1]. Several authors describe that nanostructures with diameters between 80 e 100 nm have been showed ideal in the osseointegration process and the nanotubular surfaces improve in approximately 46 t...

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Corrosion behavior and biocompatibility of nanostructured TiO₂ film on Ti6Al4V

Cited by 82 publications

References 53 publications

Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

Biomaterial Interface Investigated by Electrochemical Impedance Spectroscopy

Growth and electrochemical stability of self-organized TiO2nanotubes on Ti-2 grade and orthopedic Ti6Al4V alloy for biomedical application

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Corrosion behavior and biocompatibility of nanostructured TiO2 film on Ti6Al4V

Cited by 82 publications

References 53 publications

Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

Biomaterial Interface Investigated by Electrochemical Impedance Spectroscopy

Growth and electrochemical stability of self-organized TiO2nanotubes on Ti-2 grade and orthopedic Ti6Al4V alloy for biomedical application

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Corrosion behavior and biocompatibility of nanostructured TiO₂ film on Ti6Al4V