高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1312.

• 论文 • 上一篇    下一篇

电沉积条件对非晶态Fe-Mo合金结构及表面性质的影响

牛振江, 姚士冰, 周绍民   

  1. 厦门大学化学系, 固体表面物理化学国家重点实验室, 厦门, 361005
  • 收稿日期:1997-05-13 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 牛振江,男,38岁,博士研究生,讲师.
  • 作者简介:牛振江,男,38岁,博士研究生,讲师.
  • 基金资助:

    国家自然科学基金(批准号:29773039)资助课题.

Effects of Electrodeposition Conditions on the Structure and Surface Characteristics of Amorphous Fe-Mo Alloys

NIU Zhen-Jiang, YAO Shi-Bing, ZHOU Shao-Min   

  1. Departmetn Chemistry, State Key Laboratory for Physical Chemistry of Solid Surface, Xiamen University, Xiamen, 361005
  • Received:1997-05-13 Online:1998-08-24 Published:1998-08-24

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被引次数

16

摘要： 利用XRD、SEM和XPS等手段研究了电解液中x(Mo)(Mo在Mo+Fe中的摩尔分数)、电流密度及温度变化对电沉积非晶态Fe-Mo合金的结构和表面性质的影响.溶液中主要含有FeSO4、Na2MoO4、H3Cit和NaCl,pH值3～5.当x(Mo)大于50%,电流密度高于25mA/cm2,温度低于40℃时有利于形成非晶态结构.合金沉积层的表面呈颗粒状且有微裂纹,表面的化学性质很活泼,容易形成含低价Mo的有色氧化物表面膜.非晶Fe-Mo合金沉积层在3%NaCl溶液中的耐蚀性优于纯铁.

关键词: 电沉积, Fe－Mo合金, 非晶态, 结构, 表面性质

Abstract: The effects of molybdenum content in the bath, current density and temperature on the structure and surface characteristics of amorphous Fe Mo alloys electrodeposited from the bath containing FeSO4, Na2MoO4, H3Cit and NaCl (pH=3～5) were investigated by using XRD, SEM and XPS. The results show that amorphous Fe-Mo alloys can be obtained as long as the molar fraction of Mo in Mo/Mo+ Fe in the bath is larger than 50%,the applied current density larger than 25mA/cm2and the temperature of electrolyte lower than 40 ℃. The SEM observation of the microstructure of the electrodeposited Fe-Mo alloys shows that the deposits contain numerous granules and cracks. According to the results of XPS, both Fe and Mo exist in metallic state in the bulk alloys but in oxidized states on the surface of the alloys. The results indicate that Fe and Mo on the surface of the alloys are easy to react with H2O or O2in air resulting in the formation of oxide films. The corrosion resistance of the amorphous alloys in 3% NaCl solution surpasses that of pure iron.

Key words: Electrodeposition, Fe-Mo alloy, Amorphous state, Structure, Surface characteristics

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