Corrosion resistance of titanium dioxide anodic coatings on Ti–6Al–4V

Vera, María L.; Linardi, Evelina; Lanzani, L.; Méndez, C. M.; Schvezov, Carlos Enrique; Ares, Alicia Esther

doi:10.1002/maco.201407988

Cited by 9 publications

(11 citation statements)

References 35 publications

(43 reference statements)

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“…The presence of different time constants included in the equivalent circuit indicated that the formed films on the surface of the alloys were associated with a complex structure that consists of two layers, one is inner and the other is outer [37,38]. These two layers result from the dominant impedance at the high frequency region for the inner layer, while the impedance at the low frequency region is dominated by the outer layer, which is porous [37,38]. The Nyquist spectra of Figure 1, which were obtained after 1 h exposure in 3.5% NaCl solutions for the different alloys, depicted the same behavior with which the values of Z and Z" increased linearly.…”

Section: Eis Measurementsmentioning

confidence: 99%

“…According to the values of polarization resistances listed in Table 2, the increase of resistance was directly proportional to the values of R P1 and R P2 (total R P = R P1 + R P2 ). The presence of different time constants included in the equivalent circuit indicated that the formed films on the surface of the alloys were associated with a Metals 2020, 10, 264 4 of 16 complex structure that consists of two layers, one is inner and the other is outer [37,38]. These two layers result from the dominant impedance at the high frequency region for the inner layer, while the impedance at the low frequency region is dominated by the outer layer, which is porous [37,38].…”

Section: Eis Measurementsmentioning

confidence: 99%

“…Diamanti et al investigated in their study that reporting the values of Q and C dl tells much about the possible deviations from ideality in the capacitive response systems. According to Vera et al [38], Zhang et al [39], and Orazem and Tribollet [40], the admittance, impedance of a CPE, as well as the value of Q may be expressed via the following relations:…”

Section: Alloymentioning

confidence: 99%

“…If n value is around 0.5, the system is behaving like a Warburg (W) and usually indicates the passivation of the materials under investigation. If the value of n < 0.5, it is a conductance and is related to a current that is non-uniform and caused by the inhomogeneities of the films or surface roughness distribution [38].…”

Section: Alloymentioning

confidence: 99%

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Beneficial Effects of Vanadium Additions on the Corrosion of Ti6AlxV Alloys in Chloride Solutions

Sherif

Abdo

Alharthi

2020

Metals

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The beneficial effects of V addition on the corrosion of a newly manufactured Ti6AlxV (x = 2 wt %, 4 wt %, 6 wt %, and 8 wt %) alloys after various exposure periods in 3.5% NaCl solutions were reported. The Ti6AlxV were produced from their raw powders using mechanical alloying. Several electrochemical techniques such as electrochemical impedance spectroscopy, cyclic potentiodynamic polarization, and potentiodynamic current versus time at 300 mV experiments were conducted. The surface morphology and the elemental analysis were performed using scanning electron microscopy and energy dispersive X-ray analyses. All results were consistent with each other revealing that the increase of V content increases the resistance of the alloys against corrosion. The increase of corrosion resistance was achieved by the role of V in decreasing the rate of corrosion as a result of the formation of oxide films on the surface of the alloys. This effect was found to increase with prolonging the immersion time of the Ti6AlxV alloys in the test medium from 1 h to 24 h and further to 48 h. particularly in implantation systems [24][25][26]. Other titanium alloys like Ti6Al7Nb and Ti13Cu4.5Ni, in addition to the Ti6Al4V alloy, have been selected as the only choice for the use in orthopedic implants [27]. It has also been reported [28][29][30][31][32][33][34] that resistance versus corrosion in-vitro to form a stable oxide film in harsh media is the main reason for these alloys to be popular and applicable in the field of biomedical applications.In this work, we aimed to produce a series of Ti-base alloys, namely Ti6Al2V, Ti6Al4V, Ti6Al6V, and Ti6Al8V alloys, from its pure powders, and reported their corrosion after immersion in 3.5% NaCl solution for different periods of time, namely 1 h, 24 h, and 48 h. The effect of increasing V content within the fabricated alloys on their corrosion in the test solution was reported using various electrochemical techniques like polarization, electrochemical impedance spectroscopy, and potentiostatic current-time at 300 mV (Ag/AgCl). Other surface analysis methods, including scanning electron microscopy (SEM) images and energy dispersive X-ray (EDX) spectra, were performed to ensure the compositions, the surface morphology, and expected corrosion products that might be formed after corrosion due to the reaction between the surfaces of the alloys and the chloride test solution.

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Section: Eis Measurementsmentioning

confidence: 99%

Section: Eis Measurementsmentioning

confidence: 99%

Section: Alloymentioning

confidence: 99%

Section: Alloymentioning

confidence: 99%

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Beneficial Effects of Vanadium Additions on the Corrosion of Ti6AlxV Alloys in Chloride Solutions

Sherif

Abdo

Alharthi

2020

Metals

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“…For TiAlV6‐4, there exists a high number of publications on the corrosion behavior in various media, due to the widespread technical use of this alloy. In comparison, less information about the growth mechanism of passivating anodic oxide films are available.…”

Section: Introductionmentioning

confidence: 99%

Micro‐electrochemical investigation of the passive behavior of thin anodic titanium oxide films on TiAlV6‐4

Langklotz

Noeske

Schneider

2018

Materials & Corrosion

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The present work describes the passive film behavior of thin anodic oxide films on polycrystalline TiAlV6‐4. Firstly, the influence of the microstructure was addressed. Therefore, the crystallographic grain orientations of the substrate were determined by EBSD and selected grains were investigated with an electrochemical micro‐capillary cell. The barrier‐like oxide films were produced by local anodization in an acetate buffered electrolyte (pH 5.9) and investigated by electrochemical impedance spectroscopy and optical reflectometry. Second, the chemical composition of the native oxide film was determined by XPS, and the results related with the micro‐electrochemical experiments. The work shows a strong effect of the basal orientation on the electrochemical behavior. During anodic oxidation, strong electron transfer reactions occur at this orientation, while the enhanced conductivity of the oxide film is also proved by electrochemical impedance spectroscopy. Moreover, a non‐highfield conformal oxide growth and crystallization was observed on the basal plane. These effects, especially the electron conductivity, is related to the incorporation of alloying elements in the passive film.

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Production and Characterization of TiO2 Nanofilms for Hemocompatible and Photocatalytic Applications

Schvezov

Vera

Schuster

et al. 2017

JOM

Self Cite

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Titanium dioxide (TiO 2 ) coatings are currently produced for hemocompatible and photocatalytic applications by using two techniques: sol-gel and anodic oxidation. In this review, the research advances on TiO 2 nanofilms produced with these techniques are presented, with a focus on different aspects such as process parameters, morphology, roughness, crystal structure, adhesion, wear and erosion resistance, corrosion resistance, hemocompatibility, toxicity, plaque and bacterial adhesion, and heterogeneous photocatalysis of immobilized porous material.

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Corrosion resistance of titanium dioxide anodic coatings on Ti–6Al–4V

Cited by 9 publications

References 35 publications

Beneficial Effects of Vanadium Additions on the Corrosion of Ti6AlxV Alloys in Chloride Solutions

Beneficial Effects of Vanadium Additions on the Corrosion of Ti6AlxV Alloys in Chloride Solutions

Micro‐electrochemical investigation of the passive behavior of thin anodic titanium oxide films on TiAlV6‐4

Production and Characterization of TiO2 Nanofilms for Hemocompatible and Photocatalytic Applications

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