Open AccessAnodic passivation mechanism of lead-tin alloys in sulfuric acid solution
Author(s) -
М. М. Бурашникова,
AUTHOR_ID,
I. V. Zotova,
И. А. Казаринов,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2013
Publication title -
èlektrohimičeskaâ ènergetika
Language(s) - English
Resource type - Journals
eISSN - 1680-9505
pISSN - 1608-4039
DOI - 10.18500/1608-4039-2013-13-4-205-212
Subject(s) - tin , passivation , anode , dissolution , materials science , sulfuric acid , alloy , porosity , metallurgy , electrode , inorganic chemistry , chemical engineering , chemistry , composite material , layer (electronics) , engineering
The process of formation of a passivating sulphatic film on electrodes made of lead-tin alloys was studied by voltammetry. This process was established to proceed under diffusive control and to be limited to mass transfer in the anode film. At anodic dissolution of lead-tin alloys, there proceeds active dissolution of tin which collects inside the anode film and passes to solution. Owing to the formation of a more porous sulphatic film on the surface of a tin-containing alloy, the constant of diffusive process increases.