研究了镀液中缓冲剂浓度对铝合金表面化学镀的影响,利用测定镀速、扫描电镜、能谱分析和极化曲线等方法对化学镀的速度、镀层形貌、镀层成分和镀层的耐腐蚀性进行了表征。结果表明:缓冲剂采用丁二酸,其浓度为16 g/L时镀速最快,镀层均匀、致密、颗粒细小,并且镀层含P量最大,耐腐蚀性最强。 The effect of buffer concentration on electroless plating on aluminum alloy surface was studied. The effects of electroless plating speed, coating morphology, coating composition and plating resistance were studied by measuring the coating speed, scanning electron microscopy, energy spectrum analysis and polarization curves. Corrosivity was characterized. The results showed that succinate was used as buffering agent, the plating speed was the fastest when the concentration was 16 g / L, the coating was even and dense, the particles were small, and the content of P was the highest and the corrosion resistance was the strongest.