中文摘要：

采用直流电沉积技术在黄铜基体上制备出低Fe高Ni的纳米晶Ni-Fe合金镀层。研究不同Fe2＋质量浓度（2～12 g/L）对合金镀层的表面形貌、镀层成分、相结构、镀层显微硬度和耐蚀性的影响规律。实验结果表明,电镀Ni-Fe合金可获得纳米晶结构,当Fe2＋质量浓度为4 g/L时,硬度较高,为658 HV。在质量分数为3.5%的NaCl溶液中,Fe2＋质量浓度为4 g/L时,合金镀层的耐蚀性最好,自腐蚀电流密度较小,约为0.430μA/cm2,涂层电阻较大,约为143 400Ω,比基体黄铜提高约40倍。

英文摘要：

Nanocrystalline Ni-Fe alloy coatings with a higher chemical in Ni and lower in Fe on brass were prepared by DC-electrodeposition technology.The effects of different Fe2＋ concentration（ranging from 2 g/L to 12 g/L）on surface morphology,chemical composition,phase structure,micro-hardness and corrosion resistance of the coating were studied.Experimental results show that the Ni-Fe alloy coating is nano-crystalling,and the Fe2＋ concentration of about 4 g/L has the highest hardness of about 658 HV.For the Fe2＋ concentration of about 12 g/L,the coating exhibits the best corrosion resistance in 3.5% NaCl solution,with the corrosion current density of about 0.430 μA/cm2 and the coating resistance of about 143 400 Ω,respectively,which is about 40 times less than that of brass substrate.