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[目的]精细薄长有钩槽零件在三价铬电镀过程中常因电流密度和镀液传质不均引发细钩镀层烧焦、窄深长槽内壁漏镀等问题。[方法]分别在镀液静止与不同搅拌速率(200、400和600 r/min)条件下对精细薄长有钩槽零件进行三价铬电镀。通过扫描电镜(SEM)表征，结合力和显微硬度测试，以及摩擦磨损试验，研究了搅拌对零件不同部位Cr镀层微观形貌、结合力、显微硬度及耐磨性的影响。[结果]在电镀过程中对镀液进行适当搅拌能够显著提高精细薄长钩槽零件各部位镀层的分布均匀性和微观形貌，进而提高镀层的结合力、显微硬度、耐磨性等性能。[结论]镀液搅拌可有效解决零件细钩烧焦与槽内漏镀问题。镀液搅拌速率为400 r/min时，零件各部位的Cr镀层表面均匀、致密和平整，显微硬度最高，耐磨性最好。
Abstract：[Objective] Fine, thin, and long hooked-groove parts often encounter issues such as burnt coatings at fine hooks and skip-plating at inner wall of narrow-deep-long grooves during trivalent chromium electroplating, primarily due to uneven current density and solution mass transfer. [Method] Trivalent chromium electroplating was performed on fine, thin, and long hooked-groove parts in both stationary and agitated bath(stirring rate of 200, 400, or 600 r/min). The effects of agitation on the microstructure, adhesion, microhardness, and wear resistance of Cr coatings at different positions of the parts were studied by scanning electron microscopy(SEM), adhesion test, microhardness measurement, and friction-wear test. [Result] Appropriate agitation during electroplating significantly improved the distribution uniformity and microstructure of coatings across various part regions, consequently enhancing coating properties such as adhesion, microhardness, and wear resistance. [Conclusion] Bath stirring effectively resolved the problems of hook burning and groove skip-plating. A stirring rate of 400 r/min yielded chromium coatings that were uniform, compact, and smooth across all part areas, exhibiting the highest microhardness and the best wear resistance.
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基本信息:
DOI：10.19289/j.1004-227x.2025.11.001
中图分类号:TQ153.11
引用信息:
[1]王发顺,朱世根,巩文迪,等.搅拌对精细薄长钩槽零件三价铬电镀层组织和性能的影响[J].电镀与涂饰,2025,44(11):1-6.DOI:10.19289/j.1004-227x.2025.11.001.
基金信息: