Influence of Hydrogen Peroxide on the Composition and Porosity of Oxide-Ceramic Coatings on Alloys of the Al–Si–Cu and Al–Cu–Mg Systems

We study the influence of hydrogen peroxide on the phase composition, thickness, and porosity of oxide-ceramic coatings obtained by plasma electrolytic oxidation on Al–Si–Cu and Al–Cu–Mg aluminum alloys. For these two systems, it is shown that the presence of H 2 O 2 , with a concentration of 5 g/li...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) Vol. 57; no. 6; pp. 894 - 899
Main Authors: Posuvailo, V. M., Kovalchuk, I. V., Ivasenko, I. B.
Format: Journal Article
Language:English
Published: New York Springer US 01.05.2022
Springer
Springer Nature B.V
Subjects:
Aluminum alloys
Aluminum base alloys
Aluminum oxide
Ceramic coatings
Ceramic glazes
Ceramic materials
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Coatings
Copper
Corundum
Electrolysis
Electrolytes
Hydrogen peroxide
Magnesium
Materials Science
Oxidation
Phase composition
Porosity
Protective coatings
Silicon
Sillimanite
Solid Mechanics
Structural Materials
Thickness
sillimanite
porosity
aluminum oxides
crystal structure
plasma-electrolyte oxidation
oxide ceramic coatings
X-ray diffraction analysis
ISSN:1068-820X, 1573-885X
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Summary:We study the influence of hydrogen peroxide on the phase composition, thickness, and porosity of oxide-ceramic coatings obtained by plasma electrolytic oxidation on Al–Si–Cu and Al–Cu–Mg aluminum alloys. For these two systems, it is shown that the presence of H 2 O 2 , with a concentration of 5 g/liter, makes it possible to get a twofold increase in the thickness of the oxide-ceramic coating as compared with the original electrolyte. A subsequent increase in the concentration of hydrogen peroxide leads to a decrease in the thickness of oxide-ceramic coatings. The maximum content of corundum is obtained for hydrogen-peroxide concentrations of 5 g/liter for the Al–Cu–Mg system and 7 g/liter for the Al–Si–Cu system. The presence of silicon in the composition alloy results in the formation of sillimanite and quartz in oxide-ceramic coatings, which is accompanied by an increase in the volume of oxide-ceramic coatings. As the concentration of hydrogen peroxide in the electrolyte increases, the porosity of the Al–Si–Cu system decreases, whereas the porosity of the Al–Cu–Mg system does not change.
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ISSN:1068-820X
1573-885X
DOI:10.1007/s11003-022-00619-5