亜鉛の結晶電析に及ぼすエピクロルヒドリン-イミダゾール反応物の影響

抄録

The reaction product of epichlorohydrin and imidazole as an addition agent has been investigated by means of IR spectrometry and electrochemical methods. The product was a polymer which was found to have C-O-C bondings in the main chain with attached hydroxyl groups and quaternized imidazole rings. In an alkaline solution, the product was not subject to both oxidation and reduction but was adsorbed on the dropping mercury electrode in the range of potentials from -0.2 to -2.0V (vs. SCE), and inhibited the reduction of zincate ions. On the zinc electrode, however, the product adsorbed at the electrode surface increased the overvoltage of zinc deposition and decreased the overvoltage of hydrogen. The zinc deposit from the zincate bath containing the reaction product exhibited a preferred orientation with the (1120) plane parallel to the surface, and its cross section showed a banded structure.