Study of the Properties of Qxide Coatings Formed on Titanium by Plasma Electrolytic Oxidation Method

Abstract

The development of the modern industry requires to develop high-performance, environmentally friendly methods for the production of light structural material surface coatings. The use of products and structures made of titanium and its alloys with high wear resistance and corrosion resistance prevails in many industries, in particular in the aerospace industry, shipbuilding, and transport engineering. Nowadays, the application of the plasma electrolytic oxidation method, a promising metal surface treatment method, is of increasing interest. Besides this method is called microarc oxidation. The objective of this work is to study the properties of oxide coatings obtained on titanium alloys under the influence of rapid pulsed effects of the plasma electrolytic oxidation process. Oxide composite coatings were obtained in various electrolyte solutions in this work. Oxide coatings are characterized by high wear resistance. It has been established in tribological tests that the wear resistance of the coating is increased by 2-15 times compared with an uncoated sample. The friction coefficient curves obtained for coated samples show that there is no destruction of the coating to the base. The breaking-in area is marked in the curves. The friction surfaces are adjusted to each other and go to a stable friction mode. The latter results in the friction coefficient decrease and wear rate decrease.

An experimental analysis of the influence of electrolyte compositions, current density and duration of the micro­arc oxidation process on the structural­phase state and properties of VT3­1 titanium alloy

“…In addition, such coatings have high electrical insulating characteristics [37,38], high values of hardness and electrochemical potential [39,40]. Moreover, such an important characteristic as wear resistance can be increased tenfold [41].…”

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

“…Numerous studies have shown that the ceramic-like MAO coatings formed are able to significantly increase corrosion resistance, as well as give the surface special properties (catalytic, decorative, optical, etc.) [13][14][15][16][17]. In particular, the authors of [18] describe the application of titanium with MAO coating in medicine, whereas authors of [19] present information on its use in chemical synthesis.…”

Effect of SeO2 on corrosion resistance of micro-arc oxidation

“…However, as a bioinert metal material, titanium cannot directly bind to human bone when implanted into the human body [2][3][4]. From a practical perspective, an ideal implant should have a good ability to induce bone growth, biocompatibility, and antibacterial ability [5,6]. Therefore, various surfaces have been developed to improve the bioactivity and other properties of titanium alloys.…”