Characterization and corrosion behaviour of PEO coatings on AM50 magnesium alloy with incorporated particles

R. Arrabal; M. Mohedano; B. Mingo; E. Matykina; A. Pardo; M. C. Merino

Characterization and corrosion behaviour of PEO coatings on AM50 magnesium alloy with incorporated particles

R. Arrabal, M. Mohedano, B. Mingo, E. Matykina, A. Pardo, M. C. Merino

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Composite ceramic coatings were formed on a magnesium alloy by AC plasma electrolytic oxidation (PEO) using a phosphate-based electrolyte with α-Al₂O₃, monoclinic ZrO₂ or CeO₂ particles in suspension. Effects of particle concentration (2, 5 and 10 g/L) on the composition/morphology and corrosion behaviour of the coatings were investigated. Findings revealed successful incorporation of particles, which were preferentially located in the outer coating layer. Due to high temperatures at the locations of microdischarges, zirconia particles underwent transformation from monoclinic to tetragonal structure. The majority of alumina and ceria particles remained unaffected, although some of the alumina particles could form MgAl₂O₄ by reaction with the substrate. Porosity and thickness of the coatings tended to decrease with increasing particle concentration in the electrolyte. Coatings formed in the electrolyte containing CeO₂ particles revealed the highest corrosion resistance in 0.5% NaCI solution.

Original language	English
Title of host publication	European Corrosion Congress, EUROCORR 2015
Publisher	ASMET Austrian Society for Metallurgy and Materials
Pages	1924-1933
Number of pages	10
Volume	3
ISBN (Electronic)	9781510837379
Publication status	Published - 1 Jan 2015
Event	European Corrosion Congress, EUROCORR 2015 - Graz, Austria Duration: 6 Sep 2015 → 10 Sep 2015

Conference

Conference	European Corrosion Congress, EUROCORR 2015
Country/Territory	Austria
City	Graz
Period	6/09/15 → 10/09/15

Cite this

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title = "Characterization and corrosion behaviour of PEO coatings on AM50 magnesium alloy with incorporated particles",

abstract = "Composite ceramic coatings were formed on a magnesium alloy by AC plasma electrolytic oxidation (PEO) using a phosphate-based electrolyte with α-Al2O3, monoclinic ZrO2 or CeO2 particles in suspension. Effects of particle concentration (2, 5 and 10 g/L) on the composition/morphology and corrosion behaviour of the coatings were investigated. Findings revealed successful incorporation of particles, which were preferentially located in the outer coating layer. Due to high temperatures at the locations of microdischarges, zirconia particles underwent transformation from monoclinic to tetragonal structure. The majority of alumina and ceria particles remained unaffected, although some of the alumina particles could form MgAl2O4 by reaction with the substrate. Porosity and thickness of the coatings tended to decrease with increasing particle concentration in the electrolyte. Coatings formed in the electrolyte containing CeO2 particles revealed the highest corrosion resistance in 0.5% NaCI solution.",

author = "R. Arrabal and M. Mohedano and B. Mingo and E. Matykina and A. Pardo and Merino, {M. C.}",

year = "2015",

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booktitle = "European Corrosion Congress, EUROCORR 2015",

publisher = "ASMET Austrian Society for Metallurgy and Materials ",

address = "Austria",

note = "European Corrosion Congress, EUROCORR 2015 ; Conference date: 06-09-2015 Through 10-09-2015",

}

Arrabal, R, Mohedano, M, Mingo, B, Matykina, E, Pardo, A & Merino, MC 2015, Characterization and corrosion behaviour of PEO coatings on AM50 magnesium alloy with incorporated particles. in European Corrosion Congress, EUROCORR 2015. vol. 3, ASMET Austrian Society for Metallurgy and Materials , pp. 1924-1933, European Corrosion Congress, EUROCORR 2015, Graz, Austria, 6/09/15.

Characterization and corrosion behaviour of PEO coatings on AM50 magnesium alloy with incorporated particles. / Arrabal, R.; Mohedano, M.; Mingo, B. et al.

European Corrosion Congress, EUROCORR 2015. Vol. 3 ASMET Austrian Society for Metallurgy and Materials , 2015. p. 1924-1933.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Characterization and corrosion behaviour of PEO coatings on AM50 magnesium alloy with incorporated particles

AU - Arrabal, R.

AU - Mohedano, M.

AU - Mingo, B.

AU - Matykina, E.

AU - Pardo, A.

AU - Merino, M. C.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Composite ceramic coatings were formed on a magnesium alloy by AC plasma electrolytic oxidation (PEO) using a phosphate-based electrolyte with α-Al2O3, monoclinic ZrO2 or CeO2 particles in suspension. Effects of particle concentration (2, 5 and 10 g/L) on the composition/morphology and corrosion behaviour of the coatings were investigated. Findings revealed successful incorporation of particles, which were preferentially located in the outer coating layer. Due to high temperatures at the locations of microdischarges, zirconia particles underwent transformation from monoclinic to tetragonal structure. The majority of alumina and ceria particles remained unaffected, although some of the alumina particles could form MgAl2O4 by reaction with the substrate. Porosity and thickness of the coatings tended to decrease with increasing particle concentration in the electrolyte. Coatings formed in the electrolyte containing CeO2 particles revealed the highest corrosion resistance in 0.5% NaCI solution.

AB - Composite ceramic coatings were formed on a magnesium alloy by AC plasma electrolytic oxidation (PEO) using a phosphate-based electrolyte with α-Al2O3, monoclinic ZrO2 or CeO2 particles in suspension. Effects of particle concentration (2, 5 and 10 g/L) on the composition/morphology and corrosion behaviour of the coatings were investigated. Findings revealed successful incorporation of particles, which were preferentially located in the outer coating layer. Due to high temperatures at the locations of microdischarges, zirconia particles underwent transformation from monoclinic to tetragonal structure. The majority of alumina and ceria particles remained unaffected, although some of the alumina particles could form MgAl2O4 by reaction with the substrate. Porosity and thickness of the coatings tended to decrease with increasing particle concentration in the electrolyte. Coatings formed in the electrolyte containing CeO2 particles revealed the highest corrosion resistance in 0.5% NaCI solution.

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M3 - Conference contribution

AN - SCOPUS:85026257689

VL - 3

SP - 1924

EP - 1933

BT - European Corrosion Congress, EUROCORR 2015

PB - ASMET Austrian Society for Metallurgy and Materials

T2 - European Corrosion Congress, EUROCORR 2015

Y2 - 6 September 2015 through 10 September 2015

ER -

Characterization and corrosion behaviour of PEO coatings on AM50 magnesium alloy with incorporated particles

Abstract

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