抄録
Tin oxide growth on tinplate with aging or baking has bad influence on some performances of tinplate such as lacquer adhesive property, appearance and so on. It is important to prevent the tin oxide growth with aging from a point of view of practical uses.
The operating condition for CDC passivation treatment developed by different suppliers might vary, resulting in differences in surface characteristics and performances of the tinplate. Differences in the characteristics of passivation film among CDC passivated tinplate which were commercially manufactured by four Japanese suppliers were examined to determine the factors which affect the prevention of tin oxide growth.
Observations of change of the surface films with aging and quantitative micro-analyses of chromium and tin in surface films using TEM-XES (combination of Transmission Electron Microscope and X-ray Energy Spectrometer) directly revealed the influence of microstructure and nature of chromium compound on the prevention of tin oxide growth.
More amount of tin oxide grew with aging at area where there was smaller amount of chromium, especially where there was smaller amount of electrochemically determined chromium.
