塩化物浴からの亜鉛電析物の配向性,格子定数,炭素含有量と皮膜硬さに及ぼす有機添加剤の影響

概要

論文の詳細を見る
Electrodeposits of zinc from a chloride bath without organic additives had (0002) preferred orientation at low current density and (1120) at high current density. In the presence of additives, however, the (0002) plane of preferred orientation diminished and changed to random deposits of (1010), (1011) and (1120) planes. The relative surface energy of the crystal plane and the mechanism of adsorption inhibition could explain the results of the preferred orientation to some extent. Since the crystal growth on the (0002) axis of preferred orientation was inhibited by the dominative adsorption of additives onto the plane that has the highest value for surface energy, other axes of orientation can be developed. Carbon derived from additives was codeposited to a maximum of 1wt.%, and the lattice constant for the c-axis decreased slightly but clearly with the increase in the codeposition percentage, whereas exhibited no change in the a-axis. The hardness of the deposits from the bath without additives was about 40HV 0.01. Deposits from those with additives rose to about 100HV which was ascribed to the deformation from a slight shrinkage in the direction of the c-axis.
一般社団法人表面技術協会の論文
2001-06-01