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

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

“…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.…”

“…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].…”

“…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.…”

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

“…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].…”

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

“…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].…”