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[目的]针对航天接插件薄金层对高耐蚀性与高可靠性的需求，研究脉冲电沉积参数对氰化物镀金层微观结构与耐腐蚀性能的影响，为脉冲镀金工艺的工程化应用提供参数依据。[方法]以镀镍黄铜片为基底，采用市售氰化亚金钾镀液进行脉冲电沉积。借助X射线荧光测厚仪、扫描电镜(SEM)和极化曲线测试对镀层进行表征与耐蚀性检测。在控制金层厚度为0.3～0.6μm的条件下，通过单因素实验分别考察了脉冲频率、占空比、正向电流密度和反向电流密度对镀层表面形貌及耐蚀性的影响。[结果]当脉冲频率为800 Hz、占空比为22%、正向电流密度为0.11 A/dm2、反向电流密度为0.004 A/dm2时，所得Au镀层晶粒细小、表面致密平整，经96 h中性盐雾试验后表面无锈蚀。[结论]合理调控脉冲电沉积参数可显著优化电镀金层的微观组织与耐蚀性，本研究可为航天接插件高可靠性薄金层的制备提供参考方案。
Abstract：[Objective] To meet the demands for high corrosion resistance and high reliability of thin gold coatings on aerospace connectors, the effects of pulse electrodeposition parameters on the microstructure and corrosion resistance of cyanide-based gold coatings were studied, aiming to provide a parametric basis for the engineering application of pulse gold plating. [Method] Pulse electrodeposition was carried out on nickel-plated brass substrates in a commercial potassium gold cyanide bath. An X-ray fluorescence thickness gauge, scanning electron microscopy(SEM), and polarization curves measurement were employed to characterize the coating and evaluate its corrosion resistance. Under the condition of controlling the gold coating thickness within the range of 0.3-0.6 μm, the effects of pulse frequency, duty cycle, forward current density, and reverse current density on the surface morphology and corrosion resistance were examined through single-factor experiments. [Result] The gold coating electrodeposited at pulse frequency of 800 Hz, a duty cycle of 22%, a forward current density of 0.11 A/dm2, and a reverse current density of 0.004 A/dm2 exhibited fine grains, as well as a dense and smooth surface, with no rust formation after 96 hours of neutral salt spray testing. [Conclusion] The microstructure and corrosion resistance of electroplated gold coating can be significantly optimized by adjusting pulse parameters reasonably. This study can provide a reference scheme for the electrodeposition of highreliability thin gold coatings on aerospace connectors.
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基本信息:
DOI：10.19289/j.1004-227x.2026.04.008
中图分类号:TQ153;TG174
引用信息:
[1]欧阳欣宇,宋方祥,沈岳军,等.脉冲参数对电镀金层微观结构与耐腐蚀性能的影响[J].电镀与涂饰,2026,45(04):58-64.DOI:10.19289/j.1004-227x.2026.04.008.
基金信息:
贵州省基础科学研究计划（自然科学领域）（QKHJC-ZK[2023]YB051）
2026-04-20
2026-04-20