The composition of electrolytes for the formation of wear-resistant oxide layers on the silicon aluminum alloy by the method of high-voltage electrochemical oxidation is developed. Obtained anodic oxide films possess a thickness of up to 100 μm and a hardness of up to 5.5 GPa. The frictional behavior of oxide films in different counter-body-substrate friction pairs under conditions of dry friction was investigated. It was established that the use of the "oxide coating-oxide coating" pair in the dry friction regime shows the highest wear resistance in comparison with friction pairs of bare alloys.

Electronics and microelectronic components such as printed circuit board, capacitors, CPU heat sinks, hard drive, etc. commonly encounter harsh environmental conditions during their operational lifetime. To protect the electronics materials from conditions like corrosion, wear, humidity and contaminants, aluminium protective coating materials can be used. However, the behavior of materials in harsh environments and their effect on the reliability of electronics in industrial products has been studied only very little. Moreover, the changes in the parameters (current density, temperature and time) of commonly used aluminium under various conditions remain largely unknown. In this paper, High Voltage Electrochemical Oxidation (HVEO) was used to produce a high microhardness of 440HV and high surface thickness of up to 44µm oxide coatings on aluminum alloy AMg2 (analogues of 5052-H32 alloy) for electronic components protection. The process was carried out in electrolyte of tartaric acid and sulfuric acid as an electrolyte under constant duration for each sample and various anodizing temperatures and current densities. The samples used in the study were aluminum used for commercial electronics devices designed for use in harsh conditions.

We present the results of experimental studies focused on the effect of carbon nanotube additives on properties of galvanically deposited chromium-based coatings. The additives were introduced to the electrolyte by electrochemical treatment of the electrolyte and ultrasonic dispersion. The concentration of additives introduced to the electrolyte was 0.1 g/L. The results of coating testing showed enhanced hardness and corrosion- and wear resistance.

The aim of this paper is to study the influence of the electrolyte temperature on the porosity of the AMg2 (Al 5052) aluminum alloy and also to obtain a highly ordered porous anodic alumina (PAA) with adjustable pore sizes by using high-voltage electrochemical oxidation of the mixture of phosphoric, boric, and oxalic acids. The surface morphology and elemental composition of PAA are characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDS). Moreover, the pore formation mechanism is also discussed. The results show that the nanopore arrays in all the PAA samples are in a highly regular arrangement and the pore size ranges between 50−240 nm. However, pore widening due to chemical dissolution of the oxide by the electrolyte led to films with cone-shaped pores (hexagonal shapes or a honeycomb-like structure). This phenomenon became more pronounced with increasing electrolyte temperature. EDS analysis suggests that the main elements of the PAA are oxygen, aluminum, and a small amount of phosphorus, carbon, sodium, and magnesium.

The morphology and elemental composition of the light metal (such as titanium and aluminum alloys) surfaces subjected to electrolyte plasma treatment are considered. It was shown that the electrolyte plasma treatment of metals removes the surface defected layer enriched with the irregularities and impurities, smoothes the surface topography, and makes its elemental composition homogeneous.