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An electrochemical method is proposed for preparing metal (aluminum, titanium, tantalum, zirconium) oxides with a high affinity to oxygen in a chloride-nitrate melt at temperatures above 830 K in an argon atmosphere. It is demonstrated that either dense metal oxide layers firmly bonded to the metal base can be produced or large amounts of nanosized oxides can be formed in the melt bulk depending on the anodic oxidation conditions (electrolyte composition, oxidation temperature).

The paper presents the results of studies of fiber-reinforced concrete with carbon fibers. The effectiveness of carbon fibers uniform distribution in the concrete was obtained as a result of its preliminary mechanical mixing in water solution with chemical additives. Additives are to be used in the concrete technology as modifiers at initial stage of concrete mix preparing. The technology of preparing of fiber-reinforced concrete mix with carbon fibers is developed. The superplasticizer is based on ether carboxylates as a separator for carbon fibers. The technology allows increasing of concrete compressive strength up to 43.4% and tensile strength up to 17.5% as well as improving stability of mechanical properties.