鉛電極表面反応におよぼす電解液および表面活性剤の影響

Abstract

In this experiment, the authors studied the influence of the amounts of Pb and H2SiF6, and the influence of surface active agents in the lead electrolyte on the deposited potential, current density, dissolved potential and peak current density of the lead, and the following results were obtained.1) The starting potential of the dissolution of the lead, EO, increased with the amount of Pb in the electrolyte, but it decreased with the amount of H2SiF6. EO did not vary with changes in the amount of surface active agents.2) When the surface active agents were added in the electrolyte, the starting potential of the lead deposition, Ep, except for the addition of KSCN in the electrolyte, became lower than it had been in the case of non addition.3) The starting current density of lead deposition, Ip, reached its highest level with the addition of KSCN to the electrolyte. But, with the addition of glue to the electrolyte, Ip decreased.4) The peak potential, EA, and the peak current density, IA, of the lead dissolution were varied according to the concentration of Pb and H2SiF65) The peak potential of the lead dissolution, EA, increased as KSCN was added and also as the surface active agents phenol and polypepton were added to the electrolyte. Especialy, when KSCN was added in the electrolyte, the potential variedl argely.6) The peak current density, IA, of the lead dissolution generally decreased as the surface active agents are added to the electrolyte.7) From these results, it considered that the optimum for the electrolysis is Pb: 80g/l, H2SiF6: 80g/l and gelatin or glue: 1g/l-1.5g/l.