Influence of electropolishing and anodic oxidation on morphology, chemical composition and corrosion resistance of niobium

Sowa, Maciej; Greń, Katarzyna; Kukharenko, Andrey I.; Korotin, Danila M.; Michalska, Joanna; Szyk-Warszyńska, Lilianna; Mosiałek, Michał; Żak, Jerzy; Pamuła, Elżbieta; Kurmaev, E.Z.; Cholakh, S. O.; Simka, Wojciech

doi:10.1016/j.msec.2014.05.065

Cited by 36 publications

(12 citation statements)

References 48 publications

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“…Voltaj arttıkça nanotüpler bozulmakta ve oksit tabakasına dönüşmektedir (Kılınç et al 2011(Kılınç et al , Özcan et al 2017. (Simka et al 2011, Sowa et al 2014…”

Section: Kaplama Tabakası Ve Mikroyapıunclassified

Investigation of Electrochemical Corrosion Behavior Of Anodic Oxidized Ti6Al4V Alloy After H2 Plasma Pretreatment

Kayalı¹,

Talaş²,

Yalçin³

et al. 2017

AKU-J. Sci. Eng.

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Özet Çalışmada, 16 mm çapında ve 6 mm kalınlığında Ti6Al4V alaşımı (Grade 5) numune kullanılmıştır. Yüzeyleri metalografik olarak hazırlanan numuneler ultrasonik banyoda alkol ile temizlenerek yüzey işlemine uygun hale getirilmişlerdir. H2plazma ön işleminden sonra Anodik oksidasyon işlem için elektrolit olarak 0,15 M Hidroflorik asit, %0.3 NH4F ve %2 H2O içeren Etilen Glikol, 1M H2SO4(Sülfürik Asit) ve 1M H3PO4(Fosforik Asit) çözeltileri kullanılmış ve işlemler 2 farklı voltaj seviyesi (20 V ve 120 V) ve 60 dakika oksidasyon süresinde gerçekleştirilmiştir. Elektrokimyasal korozyon deneyleri SBF (simule Body Fluid) çözeltisinde 1 saat bekletme süresinde gerçekleştirilmiştir. Anodik oksidasyon işlemi uygulanan numunelerin yüzeyinin korozyon özelliklerinin belirlenmesi için Tafel Ekstrapolarizasyon ve Lineer Polarizasyon metodları, yüzeyin karakterizasyonu için X-ışınları ve Taramalı elektron mikroskobu (SEM) kullanılmıştır. Taramalı elektron mikroskobu, Ti6Al4V alaşım yüzeyinde Etilen Glikol (EG) çözeltisinde nano tüp formunda oksitlerin, 0,15 M Hidroflorik asit (HF) çözeltisinde ise gözenekli oksitlerin oluştuğu gözlenmiştir. Elektrokimyasal deneyler sonucunda, uygulanan voltajın artmasıyla, SBF çözeltisinde numunelerin korozyon direncinin azaldığı tespit edilmiştir.

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“…Voltaj arttıkça nanotüpler bozulmakta ve oksit tabakasına dönüşmektedir (Kılınç et al 2011(Kılınç et al , Özcan et al 2017. (Simka et al 2011, Sowa et al 2014…”

Section: Kaplama Tabakası Ve Mikroyapıunclassified

Investigation of Electrochemical Corrosion Behavior Of Anodic Oxidized Ti6Al4V Alloy After H2 Plasma Pretreatment

Kayalı¹,

Talaş²,

Yalçin³

et al. 2017

AKU-J. Sci. Eng.

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“…Conversely to anodic ZrO 2 , which is mostly crystalline, anodic Nb 2 O 5 films maintain in a wider range of conditions an amorphous structure, as a result of the high breakdown potential: field crystallization is generally achieved only at high voltages, as in the case of titanium anodizing [70][71][72]. Once again, electrolyte ions such as phosphates or sulfates may be incorporated in the oxide during anodizing [73,74].…”

Section: Anodizing Of Other Valve Metalsmentioning

confidence: 99%

On the Growth of Thin Anodic Oxides Showing Interference Colors on Valve Metals

Diamanti¹,

Garbagnoli²,

Curto³

et al. 2015

CNANO

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“…Coatings of Nb 2 O 5 and TiO 2 have been widely investigated as biomaterials and have presented excellent results due to the generation of good adhesion with different kind of hard and soft tissue cells as well as high bioactivity [2,13]. Applying this coating by sol-gel or magnetron sputtering techniques plays an essential role in the evaluation of the osseointegration with bone cells, cytotoxicity, cells surface growth process, and antibacterial properties [14][15][16]. A considerable amount of literature has been published on this kind of coating; however, these studies have not reported an important number of studies concerning the synergy between wear and corrosion that are the leading cause of the degradation in implanted materials.…”

Section: Introductionmentioning

confidence: 99%

Tribocorrosion Evaluation of Nb2O5, TiO2, and Nb2O5 + TiO2 Coatings for Medical Applications

2021

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Materials used in biomedicine for purposes of long-time stay inside the body presents diverse sort of problems like cytotoxicity, wear, biocompatibility, and ion liberation along time. This paper presents the characterization of corrosion-wear combined phenomena on Nb2O5, TiO2, and Nb2O5 + TiO2 coatings with future applications as biomaterials. After the films’ production process using magnetron sputtering technique, they were characterized through an optic, scanning electron, and atomic force microscopy to evaluate their morphology, structure, and surface damage suffered by the synergy between wear and corrosion phenomena. The life in service of the implant was evaluated in terms of the coating behavior against inside body conditions like charge, wear, and electrochemical degradation. This test was made with electrochemical measurements in simulated biological fluid combined with the wear characterization implementing a potentiostat and a tribometer in a linear wear configuration with a bone pin. As a result, the different electrochemical responses of the films were evidenced by polarization curves and equivalent circuits of the systems. The coefficient of friction and surface degradation were also obtained and evaluated. Comparing the properties of the systems, we conclude that TiO2 coatings have better behavior in terms of the wear-corrosion synergy phenomena while the systems with Nb present pitting corrosion.

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Influence of electropolishing and anodic oxidation on morphology, chemical composition and corrosion resistance of niobium

Cited by 36 publications

References 48 publications

Investigation of Electrochemical Corrosion Behavior Of Anodic Oxidized Ti6Al4V Alloy After H2 Plasma Pretreatment

Investigation of Electrochemical Corrosion Behavior Of Anodic Oxidized Ti6Al4V Alloy After H2 Plasma Pretreatment

On the Growth of Thin Anodic Oxides Showing Interference Colors on Valve Metals

Tribocorrosion Evaluation of Nb2O5, TiO2, and Nb2O5 + TiO2 Coatings for Medical Applications

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