无氰电镀Ag-C合金  

Cyanide-Free Electroplating of Ag-C Alloy

作　　者：于锦[1] 李英伟[1] 

机构地区：[1]沈阳工业大学理学院,辽宁沈阳110023

出　　处：《材料保护》2007年第9期36-38,66,共4页Materials Protection

摘　　要：研究了在无氰镀液中加入石墨后硝酸银、配位剂碘化钾、辅助配位剂的最佳含量以及施镀的电流密度等工艺条件;通过抗硫化腐蚀试验研究了不同石墨含量的银镀层在0.05%SO2和0.50%H2S气氛中的抗腐蚀变色能力;采用X射线衍射分析表明,镀层是由Ag-C组成;并通过磨损试验研究了镀层的耐磨性。结果表明,施镀最佳工艺条件为:30g/L硝酸银,400g/L配合剂碘化钾,2g/L辅助配合剂,施镀的最佳电流密度为0.6A/dm2;Ag-C镀层耐硫化变色性能和耐磨性能随镀层中石墨含量的增加而提高;镀液中石墨含量为100g/L时综合性能最佳。The best technological conditions have been studied in cyanide-free plating solution of Ag-C Alloy, including the contents of KI, AgNO3, and complexant and the current density range of the electroplating. Through experiments of the anti-sulfuring corrosion in 0. 50% SO, atmosphere and 0. 50% H2S atmosphere, the sulfur-resistant performance of the coating has been studied. According to the X-ray diffraction pattern of the coating, the coating was found to be composed of Ag and C. The wear resistance of the coating is studied by the attrition experiment. The results showed that optimal conditions were AgNO3 30 g/L, complexant KI 400 g/L, auxiliary complex compound 2 g/L, and the current density of 0.6 A/dm2. The sulfur -resistant and the anti-wear performance of the cyanide-free Ag-C alloy coating had been improved with the increasing of graphite content in the Ag-C coating. The comprehensive performance was the best when the graphite content was 100 g/L.

关 键 词：无氰电镀 Ag—C合金 耐硫性 耐磨性 

分 类 号：TQ153.2[化学工程—电化学工业]