抄録
Effcts of the crystal orientation of substrates on the nucleation of tin were studied in relation to the electrodeposition of tin from stannous sulfate bath on steel sheet having large crystals or single crystals.
When specimens were electrodeposited after dipped in nital and picral, the nucleation was predominant on (111) plane of the steel sheet having preferred orientations of (111) and (100); and was predominant on (110) plane of the sheet having preferred orientations of (111) and (110).
On the contrarary, the steel sheet after dipped in nitric acid solution showed more nucleation on (100) rather than (111), when it was deposited after observation of orientation by etch-pit method.
The difference in nucleation degree between the above two solutions was found to be prominent for such low current density as 1A/dm2.
Effects of pretreatment of substrate in alkaline or acid solution were also investigated to clarify the influences of passivity and roughness of the substrate planes on the nucleation.
