Role of PEO coatings in long-term biodegradation of a Mg alloy

E. Matykina; I. Garcia; R. Arrabal; M. Mohedano; B. Mingo; J. Sancho; M. C. Merino; A. Pardo

doi:10.1016/j.apsusc.2016.08.005

Role of PEO coatings in long-term biodegradation of a Mg alloy

E. Matykina, I. Garcia, R. Arrabal, M. Mohedano, B. Mingo, J. Sancho, M. C. Merino, A. Pardo

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

Abstract

Long-term effect of plasma electrolytic oxidation (PEO) coatings on in vitro corrosion of 3D Mg implant specimens has been investigated in simulated body fluid (SBF). Hydrogen evolution rate in PEO-coated specimens was 35 times lower compared to the non-coated alloy during first 2 weeks of immersion (0.04–0.07 mL cm⁻² d⁻¹) and reached a steady-state rate of 0.3 mL cm⁻² d⁻¹ by week 6 of immersion. Studies of the tribocorrosion behaviour of the PEO-coated alloy disclosed that the coatings rapidly lose their tribocorrosion resistance due to hydration of the coating material and associated drastic decrease of microhardness but exhibit a better tirbocorrosion performance than the non-coated material.

Original language	English
Pages (from-to)	810-823
Number of pages	14
Journal	Applied Surface Science
Volume	389
Early online date	3 Aug 2016
DOIs	https://doi.org/10.1016/j.apsusc.2016.08.005
Publication status	Published - 15 Dec 2016

Keywords

Characterization
Corrosion
Magnesium
PEO coating
Wear

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10.1016/j.apsusc.2016.08.005

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title = "Role of PEO coatings in long-term biodegradation of a Mg alloy",

abstract = "Long-term effect of plasma electrolytic oxidation (PEO) coatings on in vitro corrosion of 3D Mg implant specimens has been investigated in simulated body fluid (SBF). Hydrogen evolution rate in PEO-coated specimens was 35 times lower compared to the non-coated alloy during first 2 weeks of immersion (0.04–0.07 mL cm−2 d−1) and reached a steady-state rate of 0.3 mL cm−2 d−1 by week 6 of immersion. Studies of the tribocorrosion behaviour of the PEO-coated alloy disclosed that the coatings rapidly lose their tribocorrosion resistance due to hydration of the coating material and associated drastic decrease of microhardness but exhibit a better tirbocorrosion performance than the non-coated material.",

keywords = "Characterization, Corrosion, Magnesium, PEO coating, Wear",

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T1 - Role of PEO coatings in long-term biodegradation of a Mg alloy

AU - Matykina, E.

AU - Garcia, I.

AU - Arrabal, R.

AU - Mohedano, M.

AU - Mingo, B.

AU - Sancho, J.

AU - Merino, M. C.

AU - Pardo, A.

PY - 2016/12/15

Y1 - 2016/12/15

N2 - Long-term effect of plasma electrolytic oxidation (PEO) coatings on in vitro corrosion of 3D Mg implant specimens has been investigated in simulated body fluid (SBF). Hydrogen evolution rate in PEO-coated specimens was 35 times lower compared to the non-coated alloy during first 2 weeks of immersion (0.04–0.07 mL cm−2 d−1) and reached a steady-state rate of 0.3 mL cm−2 d−1 by week 6 of immersion. Studies of the tribocorrosion behaviour of the PEO-coated alloy disclosed that the coatings rapidly lose their tribocorrosion resistance due to hydration of the coating material and associated drastic decrease of microhardness but exhibit a better tirbocorrosion performance than the non-coated material.

AB - Long-term effect of plasma electrolytic oxidation (PEO) coatings on in vitro corrosion of 3D Mg implant specimens has been investigated in simulated body fluid (SBF). Hydrogen evolution rate in PEO-coated specimens was 35 times lower compared to the non-coated alloy during first 2 weeks of immersion (0.04–0.07 mL cm−2 d−1) and reached a steady-state rate of 0.3 mL cm−2 d−1 by week 6 of immersion. Studies of the tribocorrosion behaviour of the PEO-coated alloy disclosed that the coatings rapidly lose their tribocorrosion resistance due to hydration of the coating material and associated drastic decrease of microhardness but exhibit a better tirbocorrosion performance than the non-coated material.

KW - Characterization

KW - Corrosion

KW - Magnesium

KW - PEO coating

KW - Wear

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U2 - 10.1016/j.apsusc.2016.08.005

DO - 10.1016/j.apsusc.2016.08.005

M3 - Article

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VL - 389

SP - 810

EP - 823

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

ER -

Role of PEO coatings in long-term biodegradation of a Mg alloy

Abstract

Keywords

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