THE IMPORTANCE OF CURRENT MODE ON THE PROPERTIES OF PEO COATINGS DEPOSITED ON THE SURFACE OF POWDER METALLURGY-PRODUCED MG SUBSTRATE

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

THE IMPORTANCE OF CURRENT MODE ON THE PROPERTIES OF PEO COATINGS DEPOSITED ON THE SURFACE OF POWDER METALLURGY-PRODUCED MG SUBSTRATE

Popis výsledku v původním jazyce

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).

Název v anglickém jazyce

THE IMPORTANCE OF CURRENT MODE ON THE PROPERTIES OF PEO COATINGS DEPOSITED ON THE SURFACE OF POWDER METALLURGY-PRODUCED MG SUBSTRATE

Popis výsledku anglicky

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).

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL-Conference Proceedings

ISBN

978-80-88365-21-1

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

346-351

Název nakladatele

Tanger Ltd

Místo vydání

SLEZSKA

Místo konání akce

Brno

Datum konání akce

22. 5. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001658866300056