Electrochemical impedance spectroscopic characterization of titanium during alkali treatment and apatite growth in simulated body fluid

Raman, V.; Tamilselvi, S.; Rajendran, N.

doi:10.1016/j.electacta.2007.06.040

Cited by 40 publications

(31 citation statements)

References 20 publications

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“…These results indicate that hydroxyapatite is successfully prepared on the surface of AHEC/AZ31. However, we also see the existence of carbonate bands (CO 3 2− ) at 1658 cm −1 , and this may be attributed to small amounts of carbonate groups in hydroxyapatite [34]. The material characterization results confirm the hydroxyapatite coating is formed on the AZ31 magnesium alloy.…”

Section: Characterization Of the Samples Surfacessupporting

confidence: 64%

“…Metals and their alloys are widely used in dentistry, orthopedics and cardiovascular medicine because of their good mechanical properties and good biocompatibility as implant materials [1][2][3][4]. Magnesium is a necessary element to human nutrition, and some scholars believe that magnesium and magnesium alloys are suitable as a biodegradable implant material [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of Aminated Hydroxyethyl Cellulose-Induced Biomimetic Hydroxyapatite Coatings on the AZ31 Magnesium Alloy

Zhu

Sun

et al. 2017

Metals

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Abstract:The purpose of this work is to improve the cytocompatibility and corrosion resistance of magnesium alloy in the hope of preparing a biodegradable medical material. The aminated hydroxyethyl cellulose-induced biomimetic hydroxyapatite coating was successfully prepared on AZ31 magnesium alloy surface with a sol-gel spin coating method and biomimetic mineralization. Potentiodynamic polarization tests and electrochemical impedance spectroscopy showed that the hydroxyapatite/aminated hydroxyethyl cellulose (HA/AHEC) coating can greatly improve the corrosion resistance of AZ31 magnesium alloy and reduce the degradation speed in simulated body fluid (SBF). The MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium bromide] method and cell morphology observation results showed that the HA/AHEC coating on AZ31 magnesium alloy has excellent cytocompatibility and biological activity.

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Section: Characterization Of the Samples Surfacessupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Aminated Hydroxyethyl Cellulose-Induced Biomimetic Hydroxyapatite Coatings on the AZ31 Magnesium Alloy

Zhu

Sun

et al. 2017

Metals

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“…This reduces the economic burden and health risks of patients [2]. Therefore, magnesium alloys have recently attracted attention as an implant material for orthopedic surgery and cardiovascular medicine [4][5][6]. However, magnesium alloys also have a very negative potential and poor corrosion resistance, which influences bone bonding and suppresses their development for biomedical applications [7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Hydroxyapatite/Tannic Acid Coating to Enhance the Corrosion Resistance and Cytocompatibility of AZ31 Magnesium Alloys

Zhu

Wang

et al. 2017

Coatings

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Hydroxyapatite/tannic acid coating (HA/TA) were prepared on AZ31 magnesium alloys (AZ31) via chemical conversion and biomimetic methods. The characterization and properties of the coating were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), corrosion testing, MC3T3-E1 cell proliferation assay, and MC3T3-E1 cell morphology observation. The results showed that tannic acid as an inducer increased the number of nucleation centers of hydroxyapatite and rendered the morphology more uniform. Compared to bare AZ31 magnesium (Mg) alloys (E corr = −1.462 ± 0.006 V, I corr = (4.8978 ± 0.2455) × 10 −6 A/cm 2 ), the corrosion current density of the HA/TA-coated magnesium alloys ((5.6494 ± 0.3187) × 10 −8 A/cm 2 ) decreased two orders of magnitude, and the corrosion potential of the HA/TA-coated Mg alloys (E corr = −1.304 ± 0.006 V) increased by about 158 mV. This indicated that the HA/TA coating was effectively protecting the AZ31 against corrosion in simulated body fluid (SBF). Cell proliferation assays and cell morphology observations results showed that the HA/TA coating was not toxic to the MC3T3-E1 cells.

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“…3) showed a selfpassivation behaviour without active-passive transition potential range but with very large passive potential range, DE p (more 4000 mV, maximum potential limit in our experiments), that represents a very stable protective film [10,[38][39][40]. Corrosion potentials, E corr (Table 1) shifted to more electropositive values for anodised alloy, due to the formation of the thicker, more stable nanolayer on the surface during the anodisation process; also, the increase of E corr suggests that the electrodeposited film acts as a barrier against the corrosion attack [38][39][40]. Passive current densities, i p remained almost constantly on the whole passive potential range, consequently, the existing film progressively thickened; anodised alloy had lower i p values as result of the existence of the anodised nanolayer that moreover strengthened and thickened the native passive film, conferring it higher resistance, and protection [26].…”

Section: Electrochemical Stability Of Anodised Alloymentioning

confidence: 99%

Surface characterisation and electrochemical stability of anodised new alloy in simulated physiological electrolytes

Vasilescu

Moreno

Drob

et al. 2013

Materials and Corrosion

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In this paper, we applied the potentiostatic anodisation method on the new Ti-20Nb-10Zr-5Ta alloy surface with the aim to increase its stability and bioactivity. The morphology (SEM) and composition (Raman, FT-IR) of the obtained anodisation nanolayer are studied. Also, electrochemical stability (by cyclic potentiodynamic polarisation and EIS), corrosion resistance (by linear polarisation), long-term behaviour (by monitoring of the open circuit potentials and corresponding open circuit potential gradients) and the characterisation of the layers deposited on the alloy surface after 1000 h in acid, neutral and alkaline Ringer and neutral Ringer-Brown solutions are presented. By potentiostatic anodisation, on the alloy surface was electrodeposited a continuous nanolayer containing TiO 2 rutile type oxide. The anodised layer possesses better protective properties and at the same time better porosity, therefore a higher stability and bioactivity in comparison with the native passive film. After 1000 h in the testing solutions promoted the deposition of the brushite, phosphatotitanate and hydroxyapatite, precursors, respectively component of the human bone, namely this layer is bioactive.

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Electrochemical impedance spectroscopic characterization of titanium during alkali treatment and apatite growth in simulated body fluid

Cited by 40 publications

References 20 publications

Preparation and Characterization of Aminated Hydroxyethyl Cellulose-Induced Biomimetic Hydroxyapatite Coatings on the AZ31 Magnesium Alloy

Preparation and Characterization of Aminated Hydroxyethyl Cellulose-Induced Biomimetic Hydroxyapatite Coatings on the AZ31 Magnesium Alloy

Preparation of Hydroxyapatite/Tannic Acid Coating to Enhance the Corrosion Resistance and Cytocompatibility of AZ31 Magnesium Alloys

Surface characterisation and electrochemical stability of anodised new alloy in simulated physiological electrolytes

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