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[目的]为解决锌合金压铸件氰化物镀金污染严重、整体耐蚀性不足等问题，开发一种高耐蚀镀金新工艺。[方法]对锌合金基体依次进行无氰镀铜锌合金、焦磷酸盐镀铜、镀酸铜、镀光亮镍、镀镍锡合金和镀冲击金。[结果]本工艺在高防腐镍锡合金镀层上镀冲击金，镀层间结合良好，经热震试验无起泡或脱落，中性盐雾试验240 h无锈蚀。[结论]该工艺绿色环保，镀层性能优异，成本较低，具有良好的应用前景和市场推广价值。
Abstract：[Objective] A novel gold plating process for preparing highly corrosion-resistant coating was developed, aiming to address the critical issues of cyanide-based gold plating on zinc alloy die castings, such as severe environmental pollution, and insufficient overall corrosion resistance. [Method] A multi-layered coating was prepared on zinc alloy substrate through a sequential process involving cyanide-free copper–zinc alloy plating, pyrophosphate copper plating, acid copper plating, bright nickel plating, nickel–tin alloy plating, and strike gold plating on the zinc alloy die casting. [Result] By applying the strike gold plating over the high corrosion-resistant nickel–tin alloy layer, excellent interlayer adhesion was achieved. The obtained coating passed the thermal shock test without blistering or peeling, and withstood 240-hour neutral salt spray test without any signs of corrosion. [Conclusion] The newly developed process is environmentally friendly, can prepared coatings with superior performance at a relatively lower cost, demonstrating promising application prospects and significant market potential.
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基本信息:
DOI：10.19289/j.1004-227x.2025.11.002
中图分类号:TG174.4
引用信息:
[1]郭崇武,李小花,王晓军.高耐蚀镀金层的制备工艺及性能[J].电镀与涂饰,2025,44(11):7-11.DOI:10.19289/j.1004-227x.2025.11.002.
基金信息: