[目的]开发镀液性能稳定、镀层性能优良、废水易处理且工艺维护成本不高于氰化物镀银的无氰镀银工艺，推动无氰镀银产线建设与工程化应用。[方法]以航空零件常用材料为基体进行碱性无氰镀银。对镀液稳定性及Ag镀层外观、厚度、结合力、抗硫性和氢脆性进行表征，并与氰化物镀银工艺进行对比。[结果]该无氰镀银工艺的镀液稳定性良好，沉积速率略低于氰化物镀银，但仍满足生产需求。所得Ag镀层呈稍带黄色调的银白色，微观结构均匀致密，结合力、抗硫性及氢脆性均满足航空标准HB 5051–1993《银镀层质量检验》的要求。[结论]该无氰镀银工艺可替代传统氰化物镀银工艺，在航空领域实现工程化应用。

[Objective] This study aims to develop a cyanide-free silver electroplating process with stable bath performance, excellent coating properties, ease of wastewater treatment, and maintenance costs not exceeding those of cyanide silver electroplating, thereby promoting the construction of cyanide-free silver electroplating production lines and its engineering application. [Method] Alkaline cyanide-free silver electroplating was carried out on substrates commonly used in aviation components. The bath stability, appearance, thickness, adhesion, sulfur resistance, and hydrogen embrittlement of Ag coating were characterized and compared with those of cyanide silver electroplating. [Result] The cyanide-free silver electroplating bath exhibited good stability. The deposition rate of cyanide-free silver electroplating was slightly lower than that of cyanide silver electroplating, but sufficient to meet production demands. The obtained Ag coating exhibited a silvery white appearance with a slight yellowish tint and a uniformly compact microstructure. Its adhesion, sulfur resistance, and hydrogen embrittlement resistance were complied with the requirements specified in the aeronautical industry standard HB 5051–1993 Quality Inspection of Silver Coatings. [Conclusion] The developed cyanide-free silver electroplating process can replace traditional cyanide silver electroplating and is suitable for engineering applications in aviation field.