Interstitial oxygen's influence on the corrosion behavior of Ti-9Mo alloys

Nogueira, R. A.; Pinto, Leandro Moreira de Campos; Angelo, Antonio; Claro, Ana Paula Rosifini Alves; Grandini, Carlos Roberto

doi:10.1590/s1516-14392013005000134

Cited by 8 publications

(8 citation statements)

References 19 publications

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“…15 In particular, hydroxyapatite (HA) coatings are currently used to enhance osteo-integration and increase resistance to corrosion of medical implants. According to numerous works, HA coatings are able to improve corrosion resistance of 316L stainless steel (316LSS), 16,17 304 SS, 18 Ti, 19 Ti-9Mo alloy 20 and Mg-4.0Zn-1.0Ca-0.6Zr alloy. 21 Corrosion behavior of HA coating is usually tested in a simulated body fluid (SBF) solution.…”

mentioning

confidence: 99%

In Vitro Corrosion and Biocompatibility of Brushite/Hydroxyapatite Coatings Obtained by Galvanic Deposition on 316LSS

Blanda

Brucato

Pavia

et al. 2018

J. Electrochem. Soc.

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Corrosion behavior and cytotoxicity was reported for mixed brushite (BS)/hydroxyapatite (HA) coatings deposited on 316LSS substrate through a displacement reaction. Corrosion tests, carried out in a simulated body fluid, showed that in comparison with bare 316L, coating shifts E corr to anodic values and reduces i corr even if oscillations were observed, which were explained in terms of the chemical interactions at the solid/liquid interface. Cell biocompatibility of the coating was investigated through osteoblastic cell line MC3T3-E1, evidencing the absence of any cytotoxicity Taken together, the results show that galvanic deposition is a simple and cost-effective method for producing bioactive coatings which enhance corrosion resistance and biocompatibility of the substrate.

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mentioning

confidence: 99%

In Vitro Corrosion and Biocompatibility of Brushite/Hydroxyapatite Coatings Obtained by Galvanic Deposition on 316LSS

Blanda

Brucato

Pavia

et al. 2018

J. Electrochem. Soc.

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“…In this work, biomedical composites of Ti-Nb-Zr with different CPP contents (5,10,15, and 20 wt%) were fabricated by milling for 10 h and then sintered by SPS technique, which was suitable for hard tissue implant to shun stress shielding and bio-inert. The following conclusions can be drawn:…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, the interstitial astabilizer (e.g. O) decomposed from CPP might hinder the transformation from a to b phase [15,16]. As a matter of fact, a-Ti could improve the elastic modulus of titanium alloy.…”

Section: Mechanical Behavioursmentioning

confidence: 99%

Characterizations on Mechanical Properties and In Vitro Bioactivity of Biomedical Ti–Nb–Zr–CPP Composites Fabricated by Spark Plasma Sintering

Zhang

Wenrui

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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To alleviate the bio-inert of Ti alloys as hard tissue implants, Ti-35Nb-7Zr-xCPP (calcium pyrophosphate, x = 5, 10, 15, 20 wt%) composites were prepared by mechanical alloying (MA) and following spark plasma sintering (SPS). Mechanical behaviours and in vitro bioactivity of these composites were investigated systematically. Results showed that the composites consisted of b-Ti matrix, a-Ti, and metal-ceramic phases such as CaO, CaTiO 3 , CaZrO 3 , and Ti x P y . With increasing CPP content, the composites had higher strength (over 1500 MPa) and higher elastic modulus, but suffered almost zero plastic deformation together with lower relative density. When the CPP contents were 5 and 10 wt%, the compressive elastic moduli were 44 and 48 GPa, respectively, which were close to those of natural bones. However, the compressive elastic modulus of the composites increased significantly when CPP contents exceed 10 wt%, thus deteriorating the mechanical compatibility of the composites owing to more a-Ti and metal-ceramic phases. Besides, the surface of Ti-35Nb-7Zr-10CPP composite was deposited as a homogeneous apatite layer during soaking in simulated body fluid (SBF). It indicates a good bioactivity between the implant materials and living bones.

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“…20 Some of the researchers had reported the influence of variation in the bulk oxygen content on the corrosion behavior of different titanium alloys. [47][48][49] They showed through a potentiodynamic polarization experiment that the material with a higher bulk oxygen content had shown an increased corrosion resistance. [47][48][49] Nogueira et al 47 studied the influence of variation in the bulk oxygen content on the corrosion behavior of Ti-9Mo in phosphate buffer saline solution.…”

Section: Oxidation Duration (H)mentioning

confidence: 99%

“…[47][48][49] They showed through a potentiodynamic polarization experiment that the material with a higher bulk oxygen content had shown an increased corrosion resistance. [47][48][49] Nogueira et al 47 studied the influence of variation in the bulk oxygen content on the corrosion behavior of Ti-9Mo in phosphate buffer saline solution. They showed that with increased oxygen doping, corrosion resistance had improved.…”

Section: Oxidation Duration (H)mentioning

confidence: 99%

Influence of Oxygen-Enriched Layer on the Passivity of Ti-Al-Zr Alloy in an Alkaline Environment

Sinha¹,

Kain²

2021

J. Electrochem. Soc.

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The manuscript establishes role of an oxygen-enriched layer on the passivity of an alpha Ti alloy, Ti-Al-Zr, in an alkaline environment. The alloy was air-oxidized at 760 °C for different durations up to 700 h. This led to the formation of an oxide layer on the surface and oxygen-enriched layer in the matrix near to the surface. The oxygen-enriched layer had higher hardness as compared to the base metal. A correlation between micro-hardness and normalized oxygen content was established. The influence of oxygen-enriched layer on the passivity of the material was established in ammonia solution (pH: 10.4) at 25 °C by different electrochemical techniques- potentiodynamic polarization, chronoamperometry and electrochemical impedance spectroscopy. Donor density had decreased with increasing oxygen content in the matrix near to the surface. The diffusivity of oxygen vacancies in the passive film was calculated in the order of 10−17 cm2 s−1. The oxygen-enriched layer was shown to promote the formation of a more protective passive film.

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Interstitial oxygen's influence on the corrosion behavior of Ti-9Mo alloys

Cited by 8 publications

References 19 publications

In Vitro Corrosion and Biocompatibility of Brushite/Hydroxyapatite Coatings Obtained by Galvanic Deposition on 316LSS

In Vitro Corrosion and Biocompatibility of Brushite/Hydroxyapatite Coatings Obtained by Galvanic Deposition on 316LSS

Characterizations on Mechanical Properties and In Vitro Bioactivity of Biomedical Ti–Nb–Zr–CPP Composites Fabricated by Spark Plasma Sintering

Influence of Oxygen-Enriched Layer on the Passivity of Ti-Al-Zr Alloy in an Alkaline Environment

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