A Ukrainian university offers an electrochemical method technology for multilayer functional coatings deposition. Great attention is paid to the ecological aspects of coating deposition and the possibility of using them in green technologies. The technology of copper-nickel coatings is at Technology Readiness Level (TRL) 4. The technology of other coatings is at TRL 3. The University seeks industrial partners and academia and is open to research and technical cooperation agreements.
Multilayer coatings are an actual topic due to the need to increase the service life of products by improving anti-corrosion and mechanical protection of their surface, as well as the mechanical strength of coatings with a hierarchically developed surface for electrode materials for hydrogen evolution reaction and alcohol oxidation. The university has experience in working with functional materials. The staff has experience (including international) in the electrochemical formation of functional coatings. The group of researchers has equipment for electrochemical studies and instrument for testing microhardness. The multilayer coatings consist of many thin (less than 100 nm thickness) layers of metals, alloys or hydroxides of different compositions. The number of alternate thin layers in the coating can be around 300. The copper-nickel multilayer coatings are designed for increasing the corrosion resistance and improving the mechanical properties of the surface of metal products, as well as providing the catalytic properties of the anode surface in reactions of organic substances oxidation, such as methanol in fuel cells. The copper-nickel multilayer coating containing 50-80% of nickel is characterized by microhardness of 410-680 HV, and plasticity. It is well-adhered with an electronegative surface such as the surface of neodymium magnets. Multilayer coating consisting of layers of nickel-copper alloy and a mixture of metals and their hydroxides is characterized by improved properties, compared with single-layer coating. The catalytic activity in the electrooxidation reactions is increased in 1.5-2 times. The stability of surface properties is also higher. Zinc-nickel coatings show high corrosion resistance as they contain mainly γ-phase. Varying the composition of the alloy in multilayer coating leads to the formation of the coating with desired protective properties. The multilayer antimony-doped tin dioxide coating on titanium substrate obtained by the electrochemical method provides catalytic activity in the electrochemical destruction of organic pollutions (e.g. phenol). The coating has a higher life service compared to antimony-doped tin dioxide coating. The economic appropriateness of using multilayer coatings is caused by saving materials due to product life increase and the production cost reduction. The University is looking for industrial partners and R&D Institutions to jointly develop and commercialize the technology and is open to research and technical cooperation agreements.
Advantages and innovations
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- high microhardness and simultaneously plasticity of the copper-nickel multilayer coating,
- the catalytic activity of copper-nickel hydroxide multilayer coating in electrooxidation reactions is increased by 1.5-2 times compared to the single-layer coating that leads to an increase in productivity of electrolysis
- stability of copper-nickel hydroxide multilayer coating surface properties is 1.3-1.6 times higher compared to single-layer coating (accelerated laboratory tests).
- increased corrosion resistance and microhardness of the multilayer coating as compared to single-layer alloys based on zinc and nickel
- multilayer antimony-doped tin dioxide coating on titanium substrate has higher life service compared to antimony-doped tin dioxide coating.
: NEXT EEN Widgets (europa.eu)
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