Influence of Nickel Sulfate Additives to Electrolytes Subjected to Microarc Oxidation on the Structure, Composition, and Properties of Coatings Formed on Titanium

Богдашкина, Н. Л.; Герасимов, М. В.; Залавутдинов, Р. Х.; Касаткина, И. В.; Крит, Б. Л.; Lyudin, V. B.; Федичкин, И. Д.; Щербаков, А. И.; Apelfeld, A. V.

doi:10.3103/s106837551804004x

Cited by 19 publications

(7 citation statements)

References 7 publications

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“…MAO treatment of titanium increases the wear resistance of the product, for example, prostheses, implants in the human body, in combination with high corrosion properties of the base. The amazing resistance of MAO coatings to thermal cycling [39] expands the range of practical use of MAO coatings on titanium. Impregnation of various substances into coatings, including with the help of MAO, for example, carbon (graphene) [40][41][42][43], makes it possible to search for new areas of practical application of MAO coatings on titanium.…”

Section: Introductionmentioning

confidence: 99%

“…the formation of surface oxide – ceramic layer, the MAO method permits the doping of synthesised coatings with several additional elements through special additives to the electrolyte. As a result, modification of surface oxide layers is achieved not only by the change in chemical but also by structural-phase state [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…The effect of nickel sulphate additives in a silicate-alkaline electrolyte for MAO treatment on the corrosion and electrochemical behaviour of commercially pure titanium grade has been studied in [20]. Sodium silicate silicates Na₂SiO 3 or potassium silicates K₂SiO 3 are frequently added to the solution to facilitate the ignition of discharges [15], but this leads to the introduction of silicon into the coating, which is not always justified.…”

Section: Introductionmentioning

confidence: 99%

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Influence of different modes of microarc oxidation of titanium on the electrochemical properties and surface morphology of the obtained coatings

Касаткин

Касаткина

Богдашкина

et al. 2023

Surface Engineering

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The influence of Microarc Oxidation (MAO) modes of titanium substrate in electrolytes of the original composition is investigated. Used electrolytes no contain sodium silicate but includes nickel sulphate, sodium aluminate and alkali. The morphology and composition of the obtained coatings were studied by electron microscopy. The electrochemical behaviour was studied using polarisation curves and electrochemical impedance spectroscopy (EIS). Proposed Equivalent circuits are adequately corresponded to experimental EIS data with no more 6% error. The dependence between the elements of the Equivalent circuits and the morphological characteristics depending on the processing is considered. It is shown that MAO coatings on titanium have high corrosion resistance in an aggressive sulphuric acid. The electrochemical properties of coatings undergo irreversible changes in the direction of deterioration after anodic polarisation. It has been established that nickel doping of MAO coatings on titanium does not allow them to serve as anode materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of different modes of microarc oxidation of titanium on the electrochemical properties and surface morphology of the obtained coatings

Касаткин

Касаткина

Богдашкина

et al. 2023

Surface Engineering

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“…The chemical composition, hydrophilicity, morphology, and surface roughness in this case are key factors for the active interaction of the implant with bone tissue and subsequent osseointegration [9,10]. Surface modification methods such as plasma spraying [11][12][13][14][15], alkali treatment [16][17][18][19][20], acid etching [21][22][23][24], laser treatment [25][26][27][28], and anodizing [29][30][31] are used, as well as the increasingly widely used plasma-electrolytic method of microarc oxidation (MAO) [32][33][34][35][36]. MAO is commonly used to produce useful coatings with various oxide layers on the surface of various metals, such as Ti, Al, Mg and Zr and their alloys, to improve corrosion resistance, tribological properties, biocompatibility and thermal properties [37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Investigation of MAO Coatings Characteristics on Titanium Products Obtained by EBM Method Using Additive Manufacturing

et al. 2022

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Coatings with a thickness from 27 to 62 µm on electron beam melted Ti-6Al-4V have been formed by micro-arc oxidation (MAO) in a silicate-hypophosphite electrolyte. MAO tests in the anode-cathode mode (50 Hz) with an anode-to-cathode current ratio of 1:1 and sum current densities 10 and 20 A/dm2 were carried out. The duration of the MAO treatment was 30 and 60 min. The effect of the processing parameters on the structural properties of the MAO treated coatings was studied. The current density and treatment time significantly affect the coating thickness and surface roughness. The values of these characteristics increase as the current density increases. The effect of thermal cycling tests on surface morphology, thickness and roughness, and elemental and phase composition of MAO coatings was analyzed. After 50 cycles of thermal cycling from +200 °C to −50 °C, no cracking or delamination of coatings was observed. Coatings formed in 30 min at a current density of 20 A/dm2 turned out to be the best in terms of such indicators as surface morphology, thickness, and roughness.

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“…Электролитно-плазменные методы обработки поверхностей нашли применение в комплексном повышении эксплуатационных свойств различных материалов. Для сплавов на основе вентильных металлов широкое распространение в поверхностной обработке получило плазменноэлектролитическое оксидирование (микродуговое оксидирование), в основе которого лежит образование прочных износо-и коррозионностойких оксидных покрытий с высокими адгезионными свойствами к подложке [1][2][3][4]. Для сталей и чугунов, титановых сплавов применимым является электролитно-плазменное диффузионное насыщение атомами легких элементов (химико-термическая обработка в электролизной плазме) с формированием на поверхности модифицированных слоев, состоящих из зон соединений и диффузионных слоев с измененным фазовым составом, которые обеспечивают улучшение механических свойств, повышение сопротивления коррозии и износу [5,6].…”

Section: Introductionunclassified

Cathodic Boronitrocarburising and Anodic Polishing of Mild Steel 20 in Electrolitic Plasma

Kusmanov¹,

Tambovskii²,

Mukhacheva³

et al. 2022

EOM

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The paper discusses a possibility of increasing the wear and corrosion resistance of a low carbon steel surface after cathodic plasma electrolytic boronitrocarburising in a solution of boric acid, glycerin, and ammonium chloride, with the subsequent anodic plasma electrolytic polishing in an ammonium sulfate solution due to the formation of a modified structure consisting of a dense oxide layer and a diffusion layer below it, which contains up to 0.87% carbon, 0.80% nitrogen, and 0.87% boron upon reaching microhardness up to 970±20 HV. The competitive influence of the surface erosion under the action of discharges and high-temperature oxidation on the morphology and roughness of the surface is revealed. A positive effect of reducing the surface roughness during the formation of a dense oxide layer on the surface and a hardened diffusion layer under it on reducing the friction coefficient and mass wear, as well as reducing the roughness and additional oxidation of the surface during polishing on reducing the corrosion current density, has been established.

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Influence of Nickel Sulfate Additives to Electrolytes Subjected to Microarc Oxidation on the Structure, Composition, and Properties of Coatings Formed on Titanium

Cited by 19 publications

References 7 publications

Influence of different modes of microarc oxidation of titanium on the electrochemical properties and surface morphology of the obtained coatings

Influence of different modes of microarc oxidation of titanium on the electrochemical properties and surface morphology of the obtained coatings

Investigation of MAO Coatings Characteristics on Titanium Products Obtained by EBM Method Using Additive Manufacturing

Cathodic Boronitrocarburising and Anodic Polishing of Mild Steel 20 in Electrolitic Plasma

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