Studying the kinetics of electrode reactions on copper, silver and gold in acid thiourea-citrate electrolytes

A Green and Cost-Effective Method for Production of LiOH from Spent LiFePO4

“…The achieved current density ( j a ), where there is a leveling off after the first ascending branches, was characterized as the limiting anode current density ( j l ). And then the current density increased sharply after the leveling off, which is explained by the higher potential with the enhanced of oxygen evolution. , To confirm the control step for the leaching process, the appropriate initial section of polarization curves in Figure a were reorganized in the coordinates of reaction overpotential relationship as a function of the current density logarithm in eq and eq where b is the Tafel slope and a is a parameter related to the exchange current density.…”

“…52,53 To confirm the control step for the leaching process, the appropriate initial section of polarization curves in Figure 10a were reorganized in the coordinates of reaction overpotential relationship as a function of the current density logarithm in eq 12 and eq 13. 54 a b j log( )…”

Preparation and Purification of a Flame-Retardant Polyphenylphosphonate Containing 4,4'-Dihydroxybenzophenone

“…21 However, in the case of the anode polarization in phosphate solutions the local corrosion is often observed prior to the achievement of the critical potential that can be caused by the local disintegration of the passive film continuity. 32,33 The most widely spread theory that explains the effect of electrochemical polishing is the theory of the film passivation, 10 according to which the anode surface consists of active convex sections and passive concave sections. Such a situation is conditioned by the retarded behavior of diffusion processes from the metal surface to the electrolyte volume.…”

A study of the impact of solid cast removable dentures with silver electroplating on the condition of patients

“…-1 point -inflammation of the gingival papilla -R -2 points -inflammation of the gingival (marginal) edge -M -3 points -inflammation of the entire mucous membrane of the alveolar process -A The formula for calculating the RMA index: where n = 24 (6-11 years old) n = 28 (12-14 years old) n = 30 (from 15 years) 3 -the maximum number of points Evaluation criteria of the PMA index: -up to 25% -gingivitis is mild -25-50% -gingivitis of moderate severity -more than 51% -gingivitis is severe At the second stage of research, silver electroplating was applied to the metal parts of the brace prosthesis according to the original technology developed at the Department of Technical Electrochemistry of the National Technical University «Kharkiv Polytechnic Institute» [12,13,14,15].…”

“…9. Copper plating in the electrolyte, which included copper salt (citrate or copper (II) nitrate), thiourea, citric acid and sodium selenium [17,18]. Temperature -18-50⁰C, j k = 0.3-1.0 A/dm 2 , processing time -15 minutes, anodes -copper.…”