THE IMPORTANCE OF CURRENT MODE ON THE PROPERTIES OF PEO COATINGS DEPOSITED ON THE SURFACE OF POWDER METALLURGY-PRODUCED MG SUBSTRATE
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F26%3A0201133" target="_blank" >RIV/00216305:26310/26:0201133 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.37904/metal.2024.4945" target="_blank" >http://dx.doi.org/10.37904/metal.2024.4945</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.37904/metal.2024.4945" target="_blank" >10.37904/metal.2024.4945</a>
Alternative languages
Result language
angličtina
Original language name
THE IMPORTANCE OF CURRENT MODE ON THE PROPERTIES OF PEO COATINGS DEPOSITED ON THE SURFACE OF POWDER METALLURGY-PRODUCED MG SUBSTRATE
Original language description
Plasma electrolytic oxidation (PEO) technique is a process of surface treatment of light metallic materials such as magnesium alloy, to produce coatings increasing the corrosion resistance. In this work, the effect of direct or alternating current deposition mode on the structure and corrosion behavior of PEO coatings on Mg substrates prepared by powder metallurgy (PM) was studied. It was observed that during the deposition process of PEO coatings, the varying of current mode between alternating current (AC) and direct current (DC) led to significantly different surface modifications and coatings properties. In the case of DC PEO coatings, significantly higher thickness was achieved than in the case of AC PEO coatings. On the other hand, AC PEO coatings achieved smaller pore sizes compared to the DC PEO coatings. Considering the denser and less porous structure of AC PEO coating, significantly better electrochemical properties were observed using potentiodynamic measurements in Hank's solution. Compared to the uncoated PM Mg substrate, there was an order of magnitude decrease in the icorr of PEO-coated Mg substrate. In the case of DC PEO coatings, the i(corr) value was determined to be 8.3 mu A.cm(-2), and in the case of AC PEO even 3.4 mu A.cm(-2).
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
METAL-Conference Proceedings
ISBN
978-80-88365-21-1
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
346-351
Publisher name
Tanger Ltd
Place of publication
SLEZSKA
Event location
Brno
Event date
May 22, 2024
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001658866300056