Pourbaix diagrams for titanium in concentrated aqueous lithium bromide solutions at 25°C

Muñoz-Portero, M.J.; Garcı́a-Antón, J.; Guiñón, J. L.; Pérez-Herranz, V.

doi:10.1016/j.corsci.2011.01.013

Cited by 53 publications

(26 citation statements)

References 45 publications

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“…The corrosion behaviour of porous metals (e.g., Ti foams and trabecular metals) should be well studied as one can anticipate higher corrosion rates in inherent crevices in such materials [186,195,385,386,387,388,389]. Since the studies reported in the literature usually compare a specifically porosified material with a bulk material, the results are not consistent and do not lead to a generic, mechanistic understanding of the behaviour of porous surfaces and porous materials.…”

Section: Strategies For Corrosion Control In Vivomentioning

confidence: 99%

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Corrosion of Metallic Biomaterials: A Review

2019

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Metallic biomaterials are used in medical devices in humans more than any other family of materials. The corrosion resistance of an implant material affects its functionality and durability and is a prime factor governing biocompatibility. The fundamental paradigm of metallic biomaterials, except biodegradable metals, has been “the more corrosion resistant, the more biocompatible.” The body environment is harsh and raises several challenges with respect to corrosion control. In this invited review paper, the body environment is analysed in detail and the possible effects of the corrosion of different biomaterials on biocompatibility are discussed. Then, the kinetics of corrosion, passivity, its breakdown and regeneration in vivo are conferred. Next, the mostly used metallic biomaterials and their corrosion performance are reviewed. These biomaterials include stainless steels, cobalt-chromium alloys, titanium and its alloys, Nitinol shape memory alloy, dental amalgams, gold, metallic glasses and biodegradable metals. Then, the principles of implant failure, retrieval and failure analysis are highlighted, followed by description of the most common corrosion processes in vivo. Finally, approaches to control the corrosion of metallic biomaterials are highlighted.

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Section: Strategies For Corrosion Control In Vivomentioning

confidence: 99%

“…Line numbers correspond to reaction numbers in Ref. [186]. Solid lines bound the stability regions of the solid phases in equilibrium with 10 –6 , 10 –4 , 10 –2 and 100 M activity values of the soluble titanium species.…”

Section: Figurementioning

confidence: 99%

Corrosion of Metallic Biomaterials: A Review

2019

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“…16,17 Although it is often difficult to achieve a reliable Pourbaix diagram in one set (or several sets) of experimental measurements, because of challenges in controlled sample preparation and accurate characterization. 18 Alternatively, as is more common, Pourbaix diagrams are computed by using (a) the collected experimental formation energies [19][20][21][22] and/or (b) the calculated formation energies, 23,24 which are described in more detail below. However, both experimental and theoretical formation energies are sometimes prone to inaccuracy owing to various causes, and the computed Pourbaix diagram may not be consistent with direct electrochemical measurements.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical phase diagrams for Ti oxides from density functional calculations

Huang

Rondinelli

2015

Phys. Rev. B

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Developing an accurate simulation method for the electrochemical stability of solids, as well as understanding the physics related with its accuracy, is critically important for improving the performance of compounds and predicting the stability of new materials in aqueous environments. Herein we propose a workflow for the accurate calculation of first-principles electrochemical phase (Pourbaix) diagrams. With this scheme, we study the electrochemical stabilities of Ti and Ti oxides using density-functional theory. First, we find the accuracy of an exchange-correlation functional in predicting formation energies and electrochemical stabilities is closely related with the electronic exchange interaction therein. Second, the metaGGA and hybrid functionals with a more precise description of the electronic exchange interaction lead to a systematic improvement in the accuracy of the Pourbaix diagrams. Furthermore, we show that accurate Ti Pourbaix diagrams also require that thermal effects are included through vibrational contributions to the free energy. We then use these diagrams to explain various experimental electrochemical phenomena for the Ti-O system, and show that if experimental formation energies for Ti oxides, which contain contributions from defects owing to their generation at high (combustion) temperatures, are directly used to predict room temperature Pourbaix diagrams then significant inaccuracies result. In contrast, the formation energies from accurate first-principles calculations, e.g., using metaGGA and hybrid functionals, are found to be more reliable. Finally to facilitate the future application of our accurate electrochemical phase equilibria diagrams, the variation of the Ti Pourbaix diagrams with aqueous ion concentration is also provided.

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“…When Ti was subject to the MA process with Si, the values of EOC shifted to a more positive direction, reaching a maximum plateau during the first 4 h; afterwards, the values decreased with the immersion time until reaching a steady state. This clearly indicates an initial fast passivation process, where a Ti oxide was formed, followed by the dissolution of this oxide to form Ti +2 and Ti +3 aqueous ions [45]. This was more noticeable for samples milled during 0.5 h. Finally, for the Ti-Si alloy electrodes subjected to MA and heat treatment, the EOC values were slightly more positive than those of the samples without heat treatment and pure Ti.…”

Section: Open Circuit Potential Measurementsmentioning

confidence: 75%

Synthesis and Electrochemical Properties of Ti-Si Alloys Prepared by Mechanical Alloying and Heat Treatment

Guzmán

García

Soliz

et al. 2018

Metals

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Abstract:The aim of this work was to study the synthesis and electrochemical properties of Ti 2 wt %-Si alloys prepared by mechanical alloying (MA) and heat treatment. The MA process was performed under Ar atmosphere. The structural, morphological, and compositional evolutions during the milling and subsequent heat treatment were investigated by X-ray diffraction, energy-dispersive spectroscopy, and scanning electron microscopy. The electrochemical behavior was evaluated by open circuit potential and linear sweep voltammetry measurements. The results showed that the MA process promotes the formation of a supersaturated α-Ti-Si solid solution. During heat treatment, the Si remaining in the mechanically alloyed powders and the Si from the α-Ti-Si supersaturated solid solution reacted with Ti to form Ti-Si intermetallic compounds. These compounds have a fine and homogeneous distribution in the α-Ti matrix, which cannot be achieved by conventional casting methods. Additionally, the electrochemical evaluations revealed that the mechanically alloyed and heat-treated Ti 2 wt %-Si powders have better corrosion resistance in 1.63 M H 2 SO 4 than the pure Ti and MA Ti-Si samples. This is likely due to the particular microstructure produced during the milling and subsequent heat treatment.

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Pourbaix diagrams for titanium in concentrated aqueous lithium bromide solutions at 25°C

Cited by 53 publications

References 45 publications

Corrosion of Metallic Biomaterials: A Review

Corrosion of Metallic Biomaterials: A Review

Electrochemical phase diagrams for Ti oxides from density functional calculations

Synthesis and Electrochemical Properties of Ti-Si Alloys Prepared by Mechanical Alloying and Heat Treatment

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