Formation of Porous Anodic Oxide Film on Titanium in Phosphoric Acid Electrolyte

Liu, Z.; Thompson, G.E.

doi:10.1007/s11665-014-1262-7

Cited by 19 publications

(12 citation statements)

References 25 publications

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“…The oxide layer of the treated stems had an undulating surface of low hills and shallow valleys populated with a high density of 40–50 nm diameter pores. Pores in anodic oxide films result from dielectric breakdown of the oxide layer during the anodization process with higher applied voltages yielding larger pores . The chemistry of the treated surface in our study consisted of titanium oxides of low crystallinity with incorporated phosphate ions concentrated in the outer surface with near depletion of the aluminum and vanadium alloying elements .…”

Section: Discussionmentioning

confidence: 99%

Nanoscale surface modification by anodic oxidation increased bone ingrowth and reduced fibrous tissue in the porous coating of titanium–alloy femoral hip arthroplasty implants

et al. 2015

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Hip arthroplasty femoral stems coated with Ti6Al4V beads were treated by anodic oxidation in H PO for enhanced bioactivity and were studied in a 6-month canine model to determine the effects of the treated surface on the ingrowth of bone and soft tissues. The area fractions of bone, marrow, and fibrous tissue in the porous coating of seven treated and seven untreated control implants were determined using histomorphological techniques. The area fraction of bone within the porous coating was greater for anodic oxide treated (23.6 ± 8.3%) compared to control implants (l2.7 ± 4.7%) (p = 0.013), and there was less fibrous tissue in the treated implants (18.0 ± 9.5%) compared to the controls (33.1 ± 7.9%) (p = 0.006). XPS, XRD, TEM, and SEM analyses of the treated implants revealed a 400 nm-thick titanium oxide layer of low crystallinity with an undulating surface, populated with more than 25 nm-size pores per square micrometer. There was no detectable increase in serum titanium or in generation of particulates locally compared to the control implants. Micro and nanoscale surface modification by anodic oxidation increased bone ingrowth and reduced fibrous tissue, which may extend the longevity of fixation, limiting pathways for particle migration, and impeding the progression of osteolysis and aseptic loosening of arthroplasty components. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 283-290, 2017.

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Section: Discussionmentioning

confidence: 99%

Nanoscale surface modification by anodic oxidation increased bone ingrowth and reduced fibrous tissue in the porous coating of titanium–alloy femoral hip arthroplasty implants

et al. 2015

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“…Titanium is one of the most used metals when corrosion resistance is needed, thanks to the thin, amorphous titanium dioxide layer formed in aerated environment . Titanium is used in many application fields, often characterized by very severe chemical or physical conditions, such as strongly acidic environments, high temperatures, variable pressure, offshore drilling, marine, or aerospace environments …”

Section: Introductionmentioning

confidence: 99%

Pitting corrosion on anodized titanium: Effect of halides

Prando

Nicolis

Pedeferri

et al. 2018

Materials & Corrosion

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Funding information INSTMTitanium corrosion resistance is high in the majority of environments. However, titanium is susceptible to different forms of corrosion, if exposed to high concentrated halides containing solutions. To face this corrosion problem, expensive titanium alloys are used. An alternative method, consisting of electrochemical anodizing treatment, which promote the formation of a compact titanium oxide on the surface, could be applied to increase titanium corrosion resistance. In this work, titanium samples anodized at 20 V in H 2 SO 4 0.5 M have been tested in sodium fluorides, chlorides, bromides, and iodides at 0.5 and 2.0 M in order to define halides aggressiveness.

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“…Titanium has outstanding corrosion resistance due to a thin, amorphous, non‐stoichiometric TiO 2 protective layer (max 10 nm thick) that is formed spontaneously on the surface when exposed to aerated environment. This protective layer is very stable and allows the use of titanium in severe working conditions, such as offshore, acid environment, aerospace, automotive, high temperature applications, chemical and food industry, marine hydrometallurgical application, and nuclear fuel wastes containment, where no other metal can be used.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of pure titanium localized corrosion resistance by anodic oxidation

Prando

Brenna

Pedeferri

et al. 2017

Materials & Corrosion

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The corrosion behavior of commercially pure titanium (UNS R50400) was investigated in presence of aggressive, bromides containing, species; reported to cause severer localized corrosion compared to chlorides. To enhance localized corrosion resistance of the metal, several surface treatments were performed. Samples anodized at potentials between 10 V and 200 V were characterized in term of oxide thickness and morphology and tested with potentiodynamic analyses in NH 4 Br. This treatment was found to greatly enhance corrosion resistance of titanium but it suffers localized removal of the oxide due to wrong handling of the part before their installation. For this reason, another treatment, suitable for in-situ surface recovering was developed through chemical oxidation in NaOH 10 M.

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Formation of Porous Anodic Oxide Film on Titanium in Phosphoric Acid Electrolyte

Cited by 19 publications

References 25 publications

Nanoscale surface modification by anodic oxidation increased bone ingrowth and reduced fibrous tissue in the porous coating of titanium–alloy femoral hip arthroplasty implants

Nanoscale surface modification by anodic oxidation increased bone ingrowth and reduced fibrous tissue in the porous coating of titanium–alloy femoral hip arthroplasty implants

Pitting corrosion on anodized titanium: Effect of halides

Enhancement of pure titanium localized corrosion resistance by anodic oxidation

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