摘要
为解决传统镀锌添加剂电流密度区间狭窄、深镀能力不足的问题,以氯化物镀锌体系为研究对象,采用霍尔槽试验、远近阴极法与内孔法,探究单一及复合添加剂对电流密度区间与深镀能力的影响。结果表明:初级光亮剂(邻氯苯甲醛)可改善低电流区镀层光亮性,主光亮剂(苄叉丙酮)能提升高电流区耐受度,辅助光亮剂(PEG-6000)优化镀层均匀性;三者复配(初级1.0 g/L、主0.2 g/L、辅助4 g/L)时,光亮电流密度区间拓宽至0.7~2.6 A/dm^(2),深镀能力达78%、分散能力为0.68,显著优于单一添加剂体系。最优复合添加剂体系下,2 A/dm^(2)为适宜电流密度,低于该值内孔沉积不足,高于该值近阴极电流集中,均会降低深镀能力。研究结果可为复杂工件镀锌工艺优化提供参考。
In order to solve the problems of narrow current density range and insufficient deep plating ability of traditional zinc plating additives,the effects of single and compound additives on current density range and deep plating ability were studied by using Hall cell test,far and near cathode method and inner hole method.The results show that the primary brightener(o-chlorobenzaldehyde)can improve the brightness of the coating in low current region,the main brightener(benzylidene acetone)can improve the tolerance in high current region,and the auxiliary brightener(PEG-6000)can optimize the coating uniformity.When the three additives are compounded(primary 1.0 g/L,main 0.2 g/L and auxiliary 4 g/L),the bright current density range is widened to 0.7~2.6 A/dm^(2),and the deep plating ability reaches 78%and the dispersion ability is 0.68,which is significantly better than that of the single additive system.Under the optimal composite additive system,2 A/dm^(2)is the appropriate current density.Below this value,the hole deposition is insufficient,and above this value,the current near the cathode is concentrated,which will reduce the deep plating ability.The research results can provide reference for the optimization of zinc plating process for complex workpieces.
作者
钟兆钰
Zhong Zhaoyu(Fujian Ordnance Equipment Co.,Ltd.,Yong'an 366000,China)
出处
《当代化工研究》
2026年第1期91-93,共3页
Modern Chemical Research
关键词
镀锌添加剂
电流密度区间
深镀能力
氯化物镀锌
协同效应
zinc plating additive
current density interval
deep plating ability
chloride zinc plating
synergistic effect
