Hydrothermal Sealing of Plasma Electrolytic Oxidation Coatings Developed on AZ31 Alloy

L. Toro; A. A. Zuleta; E. Correa; F. Echeverría

doi:10.1007/s11665-022-07028-4

Hydrothermal Sealing of Plasma Electrolytic Oxidation Coatings Developed on AZ31 Alloy

L. Toro
, A. A. Zuleta
, E. Correa
, F. Echeverría

Research output: Contribution to scientific journal › Article in an indexed scientific journal › peer-review

4 Scopus citations

Abstract

In this work, a PEO coating on AZ31 magnesium alloy was post-treated in three different solutions containing NaF, Na₂CO₃ and NaAlO₂, with the aim of sealing the anodic film and consequently increasing the corrosion resistance of the material. The morphology and chemical composition of the resulting coatings were analyzed by scanning electron microscopy, x-ray diffraction and Fourier transform infrared spectroscopy. Samples were tested in a salt spray chamber, and corrosion rate was evaluated by the hydrogen evolution technique. It was found that a pore sealing treatment of 90 minutes in the solution containing a mixture of NaF and NaAlO₂ resulted in an increase in the corrosion resistance of the PEO coating.

Original language	English
Pages (from-to)	9768-9776
Number of pages	9
Journal	Journal of Materials Engineering and Performance
Volume	31
Issue number	12
DOIs	https://doi.org/10.1007/s11665-022-07028-4
State	Published - Dec 2022

Bibliographical note

Publisher Copyright:
© 2022, ASM International.

Keywords

anodic coatings
corrosion resistance
magnesium alloys
plasma electrolytic oxidation
sealing treatment

Types Minciencias

Artículos de investigación con calidad A2 / Q2

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10.1007/s11665-022-07028-4

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title = "Hydrothermal Sealing of Plasma Electrolytic Oxidation Coatings Developed on AZ31 Alloy",

abstract = "In this work, a PEO coating on AZ31 magnesium alloy was post-treated in three different solutions containing NaF, Na2CO3 and NaAlO2, with the aim of sealing the anodic film and consequently increasing the corrosion resistance of the material. The morphology and chemical composition of the resulting coatings were analyzed by scanning electron microscopy, x-ray diffraction and Fourier transform infrared spectroscopy. Samples were tested in a salt spray chamber, and corrosion rate was evaluated by the hydrogen evolution technique. It was found that a pore sealing treatment of 90 minutes in the solution containing a mixture of NaF and NaAlO2 resulted in an increase in the corrosion resistance of the PEO coating.",

keywords = "anodic coatings, corrosion resistance, magnesium alloys, plasma electrolytic oxidation, sealing treatment",

author = "L. Toro and Zuleta, \{A. A.\} and E. Correa and F. Echeverr{\'i}a",

note = "Publisher Copyright: {\textcopyright} 2022, ASM International.",

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month = dec,

doi = "10.1007/s11665-022-07028-4",

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TY - JOUR

T1 - Hydrothermal Sealing of Plasma Electrolytic Oxidation Coatings Developed on AZ31 Alloy

AU - Toro, L.

AU - Zuleta, A. A.

AU - Correa, E.

AU - Echeverría, F.

PY - 2022/12

Y1 - 2022/12

N2 - In this work, a PEO coating on AZ31 magnesium alloy was post-treated in three different solutions containing NaF, Na2CO3 and NaAlO2, with the aim of sealing the anodic film and consequently increasing the corrosion resistance of the material. The morphology and chemical composition of the resulting coatings were analyzed by scanning electron microscopy, x-ray diffraction and Fourier transform infrared spectroscopy. Samples were tested in a salt spray chamber, and corrosion rate was evaluated by the hydrogen evolution technique. It was found that a pore sealing treatment of 90 minutes in the solution containing a mixture of NaF and NaAlO2 resulted in an increase in the corrosion resistance of the PEO coating.

AB - In this work, a PEO coating on AZ31 magnesium alloy was post-treated in three different solutions containing NaF, Na2CO3 and NaAlO2, with the aim of sealing the anodic film and consequently increasing the corrosion resistance of the material. The morphology and chemical composition of the resulting coatings were analyzed by scanning electron microscopy, x-ray diffraction and Fourier transform infrared spectroscopy. Samples were tested in a salt spray chamber, and corrosion rate was evaluated by the hydrogen evolution technique. It was found that a pore sealing treatment of 90 minutes in the solution containing a mixture of NaF and NaAlO2 resulted in an increase in the corrosion resistance of the PEO coating.

KW - anodic coatings

KW - corrosion resistance

KW - magnesium alloys

KW - plasma electrolytic oxidation

KW - sealing treatment

UR - https://www.scopus.com/pages/publications/85130704291

U2 - 10.1007/s11665-022-07028-4

DO - 10.1007/s11665-022-07028-4

M3 - Artículo en revista científica indexada

AN - SCOPUS:85130704291

SN - 1059-9495

VL - 31

SP - 9768

EP - 9776

JO - Journal of Materials Engineering and Performance

JF - Journal of Materials Engineering and Performance

IS - 12

ER -

Hydrothermal Sealing of Plasma Electrolytic Oxidation Coatings Developed on AZ31 Alloy

Abstract

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Keywords

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