Fe-Ni-Cr合金电沉积工艺参数对镀层铬含量的影响  

Effects of Technological Parameters on Composition and Corrosion Resistance of Electroplated Fe-Ni-Cr Alloy Coating

作　　者：许利剑[1] 龚竹青[1] 何新快[2] 沈能斌[1] 杜晶晶[2] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]株洲工学院包装与印刷学院,湖南株洲412008

出　　处：《材料保护》2005年第12期26-28,共3页Materials Protection

基　　金：国家自然科学基金资助项目(59674025)

摘　　要：为了在铁基上获得耐腐蚀性能好的、光亮致密的Fe-N i-Cr合金镀层,在氯化物-硫酸盐混合体系中,研究了在铁基上电沉积Fe-N i-Cr合金的工艺,确定出电沉积铁镍铬合金的最佳工艺条件:阴极电流密度14 A/dm2,镀液温度30℃,pH值2.0,镀液中CrC l3.6H2O浓度为25 g/L。结果表明,合金镀层中Cr含量越高,镀层耐蚀性能越好,在最佳工艺条件下,镀层中Cr的含量接近6%,Fe的含量为54%,镀层光亮致密且耐蚀性好。The optimization of the technology for electroplating Fe-Ni-Cr alloy coating based on fluoride-sulphate electrolyte was investigated,and the optimized plating parameters were determined so as to prepare bright and compact Fe-Ni-Cr alloy coating of excellent corrosion resistance.As the results,it was suggested to prepare the desired alloy coating at optimized plating conditions,i.e.,cathode current of 14 A/dm^(2),bath temperature of 30 ℃,bath pH of 2,and concentration of CrCl_(3)·6H_(2)O of 25 g/L.The target Fe-Ni-Cr alloy coating was bright and compact and had excellent corrosion resistance.Moreover,the corrosion resistance of the alloy coating increased with increasing chromium content,and the Cr and Fe contents of the target alloy coating were 6%(mass fraction) and 54%,respectively.

关 键 词：电镀 Fe-Ni-Cr合金 耐腐蚀性 工艺参数 

分 类 号：TG174.4[金属学及工艺—金属表面处理]