Publication result detail
PEO of AZ31 Mg Alloy: Effect of Electrolyte Phosphate Content and Current Density
HADZIMA, B.; KAJÁNEK, D.; JAMBOR, M.; DRÁBIKOVÁ, J.; BŘEZINA, M.; BUHAGIAR, J.; PASTORKOVÁ, J.; JACKOVÁ, M.
Original Title
PEO of AZ31 Mg Alloy: Effect of Electrolyte Phosphate Content and Current Density
English Title
PEO of AZ31 Mg Alloy: Effect of Electrolyte Phosphate Content and Current Density
Type
WoS Article
Original Abstract
In this work, the quality of coatings prepared by plasma electrolytic oxidation (PEO) on an AZ31 magnesium alloy were evaluated. This was done by studying the effects of the chemical composition of phosphate-based process electrolytes in combination with different applied current densities on coating thickness, porosity, micro-cracking and corrosion resistance in 0.1 M NaCl. Both processing parameters were studied in four different levels. Mid-term corrosion resistance in 0.1 M NaCl was examined by electrochemical impedance spectroscopy and based on this, corrosion mechanisms were hypothesized. Results of performed experiments showed that the chosen processing parameters and electrolyte composition significantly influenced the morphology and corrosion performance of the prepared PEO coatings. The PEO coating prepared in an electrolyte with 12 g/L Na3PO4 center dot 12H(2)O and using an applied current density 0.05 A/cm(2) reached the highest value of polarization resistance. This was more than 11 times higher when compared to the uncoated counterpart.
English abstract
In this work, the quality of coatings prepared by plasma electrolytic oxidation (PEO) on an AZ31 magnesium alloy were evaluated. This was done by studying the effects of the chemical composition of phosphate-based process electrolytes in combination with different applied current densities on coating thickness, porosity, micro-cracking and corrosion resistance in 0.1 M NaCl. Both processing parameters were studied in four different levels. Mid-term corrosion resistance in 0.1 M NaCl was examined by electrochemical impedance spectroscopy and based on this, corrosion mechanisms were hypothesized. Results of performed experiments showed that the chosen processing parameters and electrolyte composition significantly influenced the morphology and corrosion performance of the prepared PEO coatings. The PEO coating prepared in an electrolyte with 12 g/L Na3PO4 center dot 12H(2)O and using an applied current density 0.05 A/cm(2) reached the highest value of polarization resistance. This was more than 11 times higher when compared to the uncoated counterpart.
Keywords
magnesium alloy; plasma electrolytic oxidation; corrosion
Key words in English
magnesium alloy; plasma electrolytic oxidation; corrosion
Authors
HADZIMA, B.; KAJÁNEK, D.; JAMBOR, M.; DRÁBIKOVÁ, J.; BŘEZINA, M.; BUHAGIAR, J.; PASTORKOVÁ, J.; JACKOVÁ, M.
RIV year
2021
Released
17.12.2020
Publisher
MDPI
Location
BASEL
ISBN
2075-4701
Periodical
Metals
Volume
10
Number
11
State
Swiss Confederation
Pages from
1
Pages to
23
Pages count
23
URL
Full text in the Digital Library
BibTex
@article{BUT169756,
author="Branislav {Hadzima} and Daniel {Kajánek} and Michal {Jambor} and Juliána {Drábiková} and Matěj {Březina} and Joseph {Buhagiar} and Jana {Pastorková} and Martina {Jacková}",
title="PEO of AZ31 Mg Alloy: Effect of Electrolyte Phosphate Content and Current Density",
journal="Metals",
year="2020",
volume="10",
number="11",
pages="1--23",
doi="10.3390/met10111521",
url="https://www.mdpi.com/2075-4701/10/11/1521"
}Documents