A Zn–Ni alloy was electrodeposited on a Cu electrode at a current density of 10–5000 A·m⁻², a charge of 5 × 10⁴ C·m⁻², and temperature of 293 K in an unagitated zincate solution containing the reaction product of epichlorohydrin and imidazole (EI polymer) as a brightener. The effect of the EI polymer on the deposition behavior of the Zn–Ni alloy was investigated. The transition current densities at which the deposition behavior shifted from the normal type to anomalous were 50–100 A·m⁻² and 10–20 A·m⁻² in the EI polymer-free solution and polymer containing solutions, respectively, indicating that the EI polymer decreased the transition current density. The transition current density corresponded to the current density at which the potential of the total polarization curve significantly shifted from the more noble region than the equilibrium potential of Zn to the less noble region. The decrease in transition current density with EI polymer was attributed to the suppression of hydrogen evolution. In addition, the current efficiency for alloy deposition in the high-current-density region decreased due to the suppression of both Zn and Ni depositions. The Ni content of deposited films decreased with EI polymer, indicating that Ni deposition was more suppressed with the EI polymer addition than Zn deposition. With increasing current density, the crystals of the films deposited from the EI polymer-containing solution smoothened and showed significant brightness. The oxidation reaction of the films deposited from the EI polymer-containing solution was suppressed, thus causing the corrosion potential to shift to a noble direction.

以 10-5000 A·m ^-2的电流密度、5 × 10 ⁴ C·m ^-2的电荷和 293 K 的温度在含有表氯醇和咪唑（EI 聚合物）的反应产物作为光亮剂。研究了EI聚合物对Zn-Ni合金沉积行为的影响。沉积行为从正常类型转变为异常类型的过渡电流密度为 50-100 A·m ^-2和 10-20 A·m ^-2分别在不含 EI 聚合物的溶液和含聚合物溶液中，表明 EI 聚合物降低了跃迁电流密度。跃迁电流密度对应于总极化曲线的电势从比 Zn 的平衡电势更高的惰性区域显着转移到非惰性区域时的电流密度。EI 聚合物过渡电流密度的降低归因于析氢的抑制。此外，由于 Zn 和 Ni 沉积的抑制，高电流密度区域合金沉积的电流效率降低。沉积薄膜的 Ni 含量随 EI 聚合物而降低，表明与 Zn 沉积相比，添加 EI 聚合物更能抑制 Ni 沉积。随着电流密度的增加，由含有 EI 聚合物的溶液沉积的薄膜晶体变得平滑并显示出显着的亮度。由含EI聚合物溶液沉积的薄膜的氧化反应受到抑制，从而导致腐蚀电位向高方向移动。