Electrochemical synthesis of nanostructured super-alloys with valuable electrochemical, electrocatalytic and corrosion properties

Valeriy S. Kublanovsky
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Oksana L. Bersirova
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Yulia S. Yapontseva
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Tetyana V. Maltseva
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Vasyl M. Nikitenko
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Eugen A. Babenkov
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Sergei V. Devyatkin
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Svetlana A. Kochetova
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Alexander D. Pysanenko
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Lyudmila V. Bogdanovich
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Sergei V. Nechyporchuk
V.I. Vernadsky Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

A study of the electrochemical formation of functional coatings by binary and ternary alloys M1M2, M1M3, M1M2M3 (where M1 is 3d6-8 metal of the iron subgroup: Fe, Co, Ni, and M2 is Mo, W; M3 is Re), from complex aqueous solutions and ionic melts. Such alloys are called “superalloys” due to a wide range of valuable physicochemical (corrosive, electrocatalytic) and functional properties and are designed to operate in extreme temperature and power modes with simultaneous exposure to an aggressive environment. The presence of rhenium in the alloy also simultaneously increases its strength and ductility (the so-called “rhenium effect”).
         A fundamentally new electrolyte (highly concentrated ammonia-acetate) has been developed for the formation of molybdenum alloys (NiMo, CoMo, FeMo) with a maximum content of a refractory component (about 85 at.%), such as those that exhibit a high electrocatalytic effect in the hydrogen evolution reaction (HER). The deposition of binary CoRe and ternary CoWRe alloys from a citrate electrolyte was carried out. The influence of the composition of solutions and electrolysis parameters on the chemical and phase composition, structure and properties of coatings has been established. The parameters of pulse electrolysis for obtaining multilayer CoMo and CoW coatings from carbamide melts containing cobalt and molybdenum / tungsten oxides have been determined.


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