Electrochemical characteristics of steel coated with TiN and TiAlN coatings

Souto, Ricardo M.; Alanyali, Hasan

doi:10.1016/s0010-938x(00)00057-3

Cited by 87 publications

(31 citation statements)

References 27 publications

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“…The values of the exponent n 2 are approximately 1; then CPE 2 can be said to behave similarly to a pure capacitor. The values of the exponent n 1 are lower than those of n 2 ; this may be due to higher defectiveness, heterogeneity, and roughness of the outer layer [27].…”

Section: Resultsmentioning

confidence: 84%

Electrochemical characteristics of titanium based biomaterials in artificial saliva

Mareci

Ungureanu

Aelenei

et al. 2007

Materials & Corrosion

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In the last decade, new titanium alloys have been developed in different areas of dentistry, such as Ti6Al7Nb, Ti6Al2Nb1Ta1Nb, and Ti5Al2.5Fe. The aim of this study was to compare the Ti6Al7Nb, Ti6Al2Nb1Ta1Nb, Ti5Al2.5Fe, and Ti6Al4V alloys with the commercial titanium, regarding the corrosion resistance in artificial saliva. In the electrochemical estimations the polarization data are converted into instantaneous corrosion rate values (I corr ). The passivation properties were comparable for the four alloys. The EIS spectra are best fitted using an equivalent circuit (EC), which corresponds to the model of a two-layer structure for the passive film. High impedance values (in the order of 10 6 V cm 2 ) were obtained from medium to low frequencies for all materials suggesting high corrosion resistance in artificial saliva.The electrochemical and corrosion behavior of Ti6Al4V is not affected on substituting vanadium with niobium, iron, molybdenum, and tantalum.

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Section: Resultsmentioning

confidence: 84%

Electrochemical characteristics of titanium based biomaterials in artificial saliva

Mareci

Ungureanu

Aelenei

et al. 2007

Materials & Corrosion

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“…5 and 6 exhibit two time constants for the tested samples. They can be divided into two distinct frequency regions: the time variable in the high-frequency part, which arises from uncompensated ohmic resistance due to the electrolytic solution and the impedance resulting from the penetration of the electrolyte through the porous film, and additionally, the low frequency part accounting for the processes taking place at the substrate/electrolyte interface [8]. The Bode plots exhibit a two-step or a two time constant system, indicating a film with two layers, i.e.…”

Section: Resultsmentioning

confidence: 99%

Chemical properties of hydroxyapatite deposited through electrophoretic process on different sandblasted samples

Gradinariu

Ştirbu

Gheorghe

et al. 2014

Materials Science-Poland

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An implantable material based on titanium (Ti6Al4V) was sandblasted in order to be deposited with a thin film of hydroxyapatite. Two samples of the alloy, in a shape of a bar with 10 mm diameter and 20 mm length, were subjected to mechanical treatment. After deposition of the hydroxyapatite through electrophoresis process, the samples were analyzed by scanning electron microscopy. The nature and chemical properties of thin films formed on Ti-based substrate were investigated with electrochemical impedance spectroscopy based on the extremely high polarization resistance of the material. The results revealed the formation of a homogeneous layer on the surface of the metallic substrate. The layer composed of TiO 2 and hydroxyapatite provided a high corrosion protection.

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“…5) at open circuit potential exhibited two phase angles [53,54]: the first angle is closed to À608 characterising some charge transfer reactions (illustrated by charge transfer resistance, R 2 and capacitance, CPE 2 in the equivalent electric circuit, Fig. 6) and another angle at about À808 showing a passive film but not fully capacitive (expressed by passive film resistance, R 1 and a constant phase element as film capacitance, CPE 1 ).…”

Section: Eis Formentioning

confidence: 99%

Electrochemical and SEM studies of a new implant bioalloy in physiological electrolytes

Popa

Vasilescu

Drob

et al. 2009

Materials & Corrosion

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A new implant Ti-7Al-3V-2Mo-2Fe alloy was elaborated and its behaviour in Ringer-Brown and Ringer solutions (of different pH values) was studied using cyclic potentiodynamic and linear polarisation, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) with its link energy dispersive X-ray system (EDX). Cyclic potentiodynamic polarisation curves revealed that the Ti-7Al-3V-2Mo-2Fe alloy is self-passivated in Ringer solutions. Pitting corrosion appeared in alkaline Ringer solution but at very electropositive values of the breakdown and pitting protection potentials and it is not possible to develop local corrosion on this alloy, even in extreme functional conditions. EIS spectra at open circuit potential exhibited two phase angles characterising a resistant passive film and some charge transfer reactions. SEM-EDX analysis shows the presence of some aggregates containing complex compounds of calcium, magnesium, phosphor, silicon deposited on the alloy surface.

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Electrochemical characteristics of steel coated with TiN and TiAlN coatings

Cited by 87 publications

References 27 publications

Electrochemical characteristics of titanium based biomaterials in artificial saliva

Electrochemical characteristics of titanium based biomaterials in artificial saliva

Chemical properties of hydroxyapatite deposited through electrophoretic process on different sandblasted samples

Electrochemical and SEM studies of a new implant bioalloy in physiological electrolytes

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