Electrochemical impedance spectroscopic studies of titanium and its alloys in saline medium

Tamilselvi, S.; Murugaraj, R.; Rajendran, N.

doi:10.1002/maco.200603979

Cited by 90 publications

(71 citation statements)

References 23 publications

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“…28 Capacitance of the porous layer, CPE 2 is higher than the capacitance of the barrier layer, CPE 1 supporting the idea that the corrosion resistance is mainly due to the barrier layer.…”

Section: Improvement Of Corrosion Resistance From Electrochemical Impmentioning

confidence: 65%

Corrosion resistance improvement of titanium base alloys

Popa¹,

Vasilescu²,

Drob³

et al. 2010

Quím. Nova

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Recebido em 4/2/10; aceito em 2/6/10; publicado na web em 24/8/10The corrosion resistance of the new Ti-6Al-4V-1Zr alloy in comparison with ternary Ti-6Al-4V alloy in Ringer-Brown solution and artificial Carter-Brugirard saliva of different pH values was studied. In Ringer-Brown solution, the new alloy presented an improvement of all electrochemical parameters due to the alloying with Zr; also, impedance spectra revealed better protective properties of its passive layer. In Carter-Brugirard artificial saliva, an increase of the passive film thickness was proved. Fluoride ions had a slight negative influence on the corrosion and ion release rates, without to affect the very good stability of the new Ti-6Al-4V-1Zr alloy.

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“…28 Capacitance of the porous layer, CPE 2 is higher than the capacitance of the barrier layer, CPE 1 supporting the idea that the corrosion resistance is mainly due to the barrier layer.…”

Section: Improvement Of Corrosion Resistance From Electrochemical Impmentioning

confidence: 65%

Corrosion resistance improvement of titanium base alloys

Popa¹,

Vasilescu²,

Drob³

et al. 2010

Quím. Nova

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show abstract

“…The existence of a compact oxide film was represented by an equivalent circuit with one time constant [25][26][27][28][29], whereas for a porous film, a circuit with two time constants was employed [18,26,27,[29][30][31][32]. Modified models Materials and Corrosion 2008, 59, No.…”

Section: Resultsmentioning

confidence: 99%

Corrosion behavior of Ti‐xNb‐13Zr alloys in Ringer's solution

Robin

Carvalho

Schneider

2008

Materials & Corrosion

105

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Ti-6Al-4V alloy has been widely used in restorative surgery due to its high corrosion resistance and biocompatibility. Nevertheless, some studies showed that V and Al release in the organism might induce cytotoxic effects and neurological disorders, which led to the development of V-free alloys and both V-and Al-free alloys containing Nb, Zr, Ta, or Mo. Among these alloys, Ti-13Nb-13Zr alloy is promising due to its better biomechanical compatibility than Ti-6Al-4V. In this work, the corrosion behavior of Ti, Ti-6Al-4V, and Ti-xNb-13Zr alloys (x ¼ 5, 13, and 20) was evaluated in Ringer's solution (pH 7.5) at 37 8C through open-circuit potential measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy. Spontaneous passivity was observed for all materials in this medium. Low corrosion current densities (in the order of 10 À7 A/cm 2 ) and high impedance values (in the order of 10 5 Vcm 2 at low frequencies) indicated their high corrosion resistance. EIS results showed that the passivating films were constituted of an outer porous layer (very low resistance) and an inner compact layer (high resistance), the latter providing the corrosion resistance of the materials. There was evidence that the Ti-xNb-13Zr alloys were more corrosion resistant than both Ti and Ti-6Al-4V in Ringer's solution.

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“…[3][4][5][6] During the last two decades EIS is frequently applied to sensor based immunochip systems coupled with functional polymers such as pH sensitive polymers. Impedance based biochips are usually consist of a dielectric, chemically sensitive film coated onto a substrate electrode.…”

Section: Introductionmentioning

confidence: 99%

An Electrochemical Enzyme Immunochip Based on Capacitance Measurement for the Detection of IgG

Yi¹,

Choi²,

Kim³

et al. 2011

Bulletin of the Korean Chemical Society

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This study describes the development of an electrochemical array immunochip for the detection of IgG. Interdigitated immunochip platforms were fabricated by sputtering gold on a glass wafer by using MEMS process and then were coated with Eudragit S100, an enteric polymer, forming an insulating layer over the working area of immunochips. The breakdown of the polymer layer was exemplified by the catalytic action of urease which, in the presence of urea, caused an alkaline pH change. This subsequently caused an increase of the double layer capacitance of the underlying electrode. Used in conjunction with a competitive immunoassay format, this allowed the ratio of initial to final electrode capacitance to be directly linked with the concentration of analyte, i.e. IgG. Responses to IgG could be detected at IgG concentration as low as 250 ngmL −1 and showed good linearity up to IgG concentration as high as 20 µgmL .

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Electrochemical impedance spectroscopic studies of titanium and its alloys in saline medium

Cited by 90 publications

References 23 publications

Corrosion resistance improvement of titanium base alloys

Corrosion resistance improvement of titanium base alloys

Corrosion behavior of Ti‐xNb‐13Zr alloys in Ringer's solution

An Electrochemical Enzyme Immunochip Based on Capacitance Measurement for the Detection of IgG

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