電気 Zn めっき皮膜の結晶形態, 配向性に及ぼす電解条件の影響

概要

論文の詳細を見る
The effect of electrolysis condition on the morphology and crystal orientation of zinc electrodeposit was investigated by using the polycrystal commercial low carbon Al-killed steel sheet as a base material and the sulfate bath under the current density of 50-200A/dm^2, flow rate of 1-2m/s and bath temperature of 50-70℃. Under the conditions where overvoltage of electrodeposit is high, such as high current density, low flow rate and low temperature, heteroepitaxy of steel/zinc decreases, so that zinc crystals become fine and random in size and growth direction. Under the high overvoltage conditions, orientation indexes of (0002)Zn and (101^^-3)Zn decrease but those of (101^^-1)Zn and (101^^-0)Zn increase. When zinc electrodeposits grow heteroepitaxially, (0002)Zn and (101^^-3)Zn planes are preferred. From these results, zinc electrodeposits are thought to progress as follows : At initial stage of plating, zinc electrodeposits grow heteroepitaxially at preferred orientations of (0002)Zn and (101^^-3)Zn. Then, random growth of zinc begins partly on the (0002)Zn and (10^^-1^^-3)Zn and finally random growth of (101^^-1)Zn and (101^^-0)Zn occurs partly on the (0002)Zn and (101^^-3)Zn.
社団法人日本鉄鋼協会の論文
1997-12-01