Bioactive plasma electrolytic oxidation coatings on Mg-Ca alloy to control degradation behaviour

M. Mohedano; B. J.C. Luthringer; B. Mingo; F. Feyerabend; R. Arrabal; P. J. Sanchez-Egido; C. Blawert; R. Willumeit-Römer; M. L. Zheludkevich; E. Matykina

doi:10.1016/j.surfcoat.2017.02.050

Bioactive plasma electrolytic oxidation coatings on Mg-Ca alloy to control degradation behaviour

M. Mohedano^*, B. J.C. Luthringer, B. Mingo, F. Feyerabend, R. Arrabal, P. J. Sanchez-Egido, C. Blawert, R. Willumeit-Römer, M. L. Zheludkevich, E. Matykina

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The present work reports on PEO coatings which can be potentially used for degradation control of Mg-based implant materials. Three coatings were developed on Mg-0.8wt%Ca alloy: two in an electrolyte with fluoride species using different treatment times and one in a fluoride-free electrolyte. Uncoated and coated materials were examined in terms of structure and morphology using TEM, SEM and XRD. The corrosion investigations on fluoride-containing samples were performed using DC potentiodynamic curves, EIS and hydrogen evolution measurements. Both PEO coatings improved the corrosion resistance compared to the bulk material and the best behaviour was found for the thinnest PEO coating (PEO1-F). The amount of released F⁻ ions was also measured with the aim of underpinning the effect of coatings and presence of fluorides species on the cell response. The bulk material and the coated alloy were studied using live/dead cell test, with the best results obtained for thinner fluoride containing coatings.

Original language	English
Pages (from-to)	454-467
Number of pages	14
Journal	Surface and Coatings Technology
Volume	315
Early online date	6 Mar 2017
DOIs	https://doi.org/10.1016/j.surfcoat.2017.02.050
Publication status	Published - 15 Apr 2017

Keywords

Biodegradable materials
Corrosion
Mg alloys
PEO

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.surfcoat.2017.02.050

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title = "Bioactive plasma electrolytic oxidation coatings on Mg-Ca alloy to control degradation behaviour",

abstract = "The present work reports on PEO coatings which can be potentially used for degradation control of Mg-based implant materials. Three coatings were developed on Mg-0.8wt%Ca alloy: two in an electrolyte with fluoride species using different treatment times and one in a fluoride-free electrolyte. Uncoated and coated materials were examined in terms of structure and morphology using TEM, SEM and XRD. The corrosion investigations on fluoride-containing samples were performed using DC potentiodynamic curves, EIS and hydrogen evolution measurements. Both PEO coatings improved the corrosion resistance compared to the bulk material and the best behaviour was found for the thinnest PEO coating (PEO1-F). The amount of released F− ions was also measured with the aim of underpinning the effect of coatings and presence of fluorides species on the cell response. The bulk material and the coated alloy were studied using live/dead cell test, with the best results obtained for thinner fluoride containing coatings.",

keywords = "Biodegradable materials, Corrosion, Mg alloys, PEO",

author = "M. Mohedano and Luthringer, {B. J.C.} and B. Mingo and F. Feyerabend and R. Arrabal and Sanchez-Egido, {P. J.} and C. Blawert and R. Willumeit-R{\"o}mer and Zheludkevich, {M. L.} and E. Matykina",

year = "2017",

month = apr,

day = "15",

doi = "10.1016/j.surfcoat.2017.02.050",

language = "English",

volume = "315",

pages = "454--467",

journal = "Surface and Coatings Technology",

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T1 - Bioactive plasma electrolytic oxidation coatings on Mg-Ca alloy to control degradation behaviour

AU - Mohedano, M.

AU - Luthringer, B. J.C.

AU - Mingo, B.

AU - Feyerabend, F.

AU - Arrabal, R.

AU - Sanchez-Egido, P. J.

AU - Blawert, C.

AU - Willumeit-Römer, R.

AU - Zheludkevich, M. L.

AU - Matykina, E.

PY - 2017/4/15

Y1 - 2017/4/15

N2 - The present work reports on PEO coatings which can be potentially used for degradation control of Mg-based implant materials. Three coatings were developed on Mg-0.8wt%Ca alloy: two in an electrolyte with fluoride species using different treatment times and one in a fluoride-free electrolyte. Uncoated and coated materials were examined in terms of structure and morphology using TEM, SEM and XRD. The corrosion investigations on fluoride-containing samples were performed using DC potentiodynamic curves, EIS and hydrogen evolution measurements. Both PEO coatings improved the corrosion resistance compared to the bulk material and the best behaviour was found for the thinnest PEO coating (PEO1-F). The amount of released F− ions was also measured with the aim of underpinning the effect of coatings and presence of fluorides species on the cell response. The bulk material and the coated alloy were studied using live/dead cell test, with the best results obtained for thinner fluoride containing coatings.

AB - The present work reports on PEO coatings which can be potentially used for degradation control of Mg-based implant materials. Three coatings were developed on Mg-0.8wt%Ca alloy: two in an electrolyte with fluoride species using different treatment times and one in a fluoride-free electrolyte. Uncoated and coated materials were examined in terms of structure and morphology using TEM, SEM and XRD. The corrosion investigations on fluoride-containing samples were performed using DC potentiodynamic curves, EIS and hydrogen evolution measurements. Both PEO coatings improved the corrosion resistance compared to the bulk material and the best behaviour was found for the thinnest PEO coating (PEO1-F). The amount of released F− ions was also measured with the aim of underpinning the effect of coatings and presence of fluorides species on the cell response. The bulk material and the coated alloy were studied using live/dead cell test, with the best results obtained for thinner fluoride containing coatings.

KW - Biodegradable materials

KW - Corrosion

KW - Mg alloys

KW - PEO

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U2 - 10.1016/j.surfcoat.2017.02.050

DO - 10.1016/j.surfcoat.2017.02.050

M3 - Article

AN - SCOPUS:85014719989

SN - 0257-8972

VL - 315

SP - 454

EP - 467

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Bioactive plasma electrolytic oxidation coatings on Mg-Ca alloy to control degradation behaviour

Abstract

Keywords

UN SDGs

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