Microarc oxidation in slurry electrolytes: A review

Борисов, А. М.; Крит, Б. Л.; Lyudin, V. B.; Morozova, N. V.; Суминов, И. В.; Apelfeld, A. V.

doi:10.3103/s106837551601004x

Cited by 32 publications

(18 citation statements)

References 18 publications

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“…Moreover, these electrolytes allow efficient treatment of alloys with different chemical composition and formation of oxide coatings doped with one or more components [5,11]. Electrolyte suspensions consisting of a main homogeneous electrolyte and additives from powders with varying nature and dispersion degree are also used [12,13]. In this case, besides the electrochemical and thermochemical reactions, the growth of the coating occurs due to the mechanical introduction of particles from the working solution.…”

Section: Features Of Peo Treatment Aluminum Andmentioning

confidence: 99%

Features of Plasma Electrolytic Formation of Manganese- and Cobalt-Containing Composites on Aluminum Alloys

Karakurkchi

Сахненко

Ved

et al. 2019

Advances in Materials Science and Engineering

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is paper presents the results of studies on the electrochemical treatment characteristics of aluminum and alloys in alkaline electrolytes. It is shown that the heterogeneity of the alloys composition complicates the formation of the surface oxide layer. To homogenize the treated surface and obtain oxide coatings doped with manganese and cobalt, electrolytes based on KOH and K 4 P 2 O 7 with the addition of KMnO 4 and CoSO 4 were used. Plasma electrolytic oxidizing (PEO) in these electrolytes in the range of current densities 5-20 A/dm 2 allows to obtain mixed oxide coatings which contained both aluminum oxide matrix and doping metal oxides Al 2 O 3 ·MnO x and Al 2 O 3 ·CoO y . It is shown that an increase in the PEO current density and the concentration of manganate-and cobalt(II) ions in the solution leads to an increase the content of dopant metals in the coatings outer layer. e incorporation of manganese and cobalt oxides in the composition of the surface layers was confirmed by the results of X-ray structural analysis. e rational modes of aluminum alloys PEO treatment were substantiated to obtain coatings with manganese and cobalt contents up to 25-40 at.%. Formed oxide systems have a developed surface and high adhesion to the base metal and show an increased corrosion resistance and catalytic activity. is allows us to view them as promising materials for air-and watercleaning technologies and internal combustion engine waste gas purification systems.

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Section: Features Of Peo Treatment Aluminum Andmentioning

confidence: 99%

Features of Plasma Electrolytic Formation of Manganese- and Cobalt-Containing Composites on Aluminum Alloys

Karakurkchi

Сахненко

Ved

et al. 2019

Advances in Materials Science and Engineering

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“…Using the electrolytes of a given type allows efficient treatment of alloys with different chemical composition and creation of oxide coatings doped with one or more components [3,7]. Electrolytes-suspensions that consist of the base homogeneous electrolyte and additives from powders of different nature and dispersion degree have also been utilized [8,9]. In this case, in addition to electrochemical and thermo-chemical transformations, the growth of coating occurs due to mechanical capture of particles from a working solution.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Study into formation of cobalt-containing peo-coatings on АК12М2МgN from a pyrophosphate electrolyte

Karakurkchi

Сахненко

Ved

et al. 2017

EEJET

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Досліджено формування кобальтовмісних оксидних покривів методом плазмово-електролітичного оксидування силуміну АК12М2МгН у пірофосфатних електролітах. Показано, що варіювання концентрації кобальту сульфату в розчині впливає на робочі параметри ПЕО. Встановлено, що склад та морфологія сформованих оксидних шарів залежать від співвідношення компонентів електроліту. Це дозволяє керувати процесом інкорпорації допанта в матрицю оксиду алюмінія. Обгрунтовано склад пірофосфатного електроліту для одержання оксидних покривів, збагачених каталітичним компонентом Ключові слова: оксидний покрив, силумін, АК12М2МгН, плазмово-електролітичне оксидування, пірофосфатний електроліт, морфологія поверхні Исследовано формирование кобальтосодержащих оксидных покрытий методом плазменно-электролитического оксидирования силумина АК12М2МгН в пирофосфатных электролитах. Показано, что варьирование концентрации кобальта сульфата в растворе влияет на рабочие параметры ПЭО. Установлено, что состав и морфология сформированных оксидных слоев зависят от соотношения компонентов электролита. Это позволяет управлять процессом инкорпорации допанта в матрицу оксида алюминия. Обоснован состав пирофосфатного электролита для получения оксидных покрытий, обогащенных каталитическим компонентом Ключевые слова: оксидное покрытие, силумин, АК12М2МгН, плазменно-электролитическое оксидирование, пирофосфатный электролит, морфология поверхности

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“…These problems can be solved by the formation of ceramic-like coatings by plasma electrolytic oxidation (PEO) [10][11][12]. It is known that PEO coatings have high corrosion-protective ability, wear resistance, and heat resistance [10][11][12][13][14][15][16][17][18][19]. PEO technology is well developed for compact aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

“…A thin transition layer at the boundary with the substrate is responsible for its corrosion-protective properties. The main layer of PEO coatings on aluminum alloys, generally, includes the corundum, α-Al 2 O 3 , which has high microhardness and provides good wear resistance [10,11,[18][19][20][21]. In particular, aluminum alloys with PEO coatings have a high wear resistance under sliding friction [22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Study of Plasma Electrolytic Oxidation Coatings on Aluminum Composites

Агуреев¹,

Савушкина

Ашмарин³

et al. 2018

Metals

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Coatings, with a thickness of up to 75 µm, were formed by plasma electrolytic oxidation (PEO) under the alternating current electrical mode in a silicate-alkaline electrolyte on aluminum composites without additives and alloyed with copper (1-4.5%). The coatings' structure was analyzed by scanning electron microscopy, X-ray microanalysis, X-ray photoelectron spectroscopy, nuclear backscattering spectrometry, and XRD analysis. The coatings formed for 60 min were characterized by excessive aluminum content and the presence of low-temperature modifications of alumina γ-Al 2 O 3 and η-Al 2 O 3. The coatings formed for 180 min additionally contained high-temperature corundum α-Al 2 O 3 , and aluminum inclusions were absent. The electrochemical behavior of coated composites and uncoated ones in 3% NaCl was studied. Alloyage of aluminum composites with copper increased the corrosion current density. Plasma electrolytic oxidation reduced it several times.

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Microarc oxidation in slurry electrolytes: A review

Cited by 32 publications

References 18 publications

Features of Plasma Electrolytic Formation of Manganese- and Cobalt-Containing Composites on Aluminum Alloys

Features of Plasma Electrolytic Formation of Manganese- and Cobalt-Containing Composites on Aluminum Alloys

Study into formation of cobalt-containing peo-coatings on АК12М2МgN from a pyrophosphate electrolyte

Study of Plasma Electrolytic Oxidation Coatings on Aluminum Composites

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