TY JOUR TI THE EFFECT OF THE ADDITION OF 2,6-BISISOTHIURONIUM-9-SELENABICYCLO[3.3.1]NONANE DIHYDROBROMIDE ON THE POROSITY OF NICKEL COATINGS KW electrochemical nickel plating KW gloss forming agent KW coating KW sulfuric acid electrolyte KW porosity JO Modern Technologies and Scientific and Technological Progress AU Skulin, B.A. AU Sosnovskaya, N.G. AU Korchevin, N.A. PY 2025 IS 2025 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»