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研究论文

Fe基非晶和纳米晶合金晶化及电化学腐蚀行为

  • 李翔 ,
  • 严彪 ,
  • 董鹏
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  • 同济大学材料科学与工程学院,上海市金属功能材料开发应用重点实验室;

收稿日期: 2009-08-28

  修回日期: 2009-08-28

  网络出版日期: 2009-08-28

Crystallization and Electrochemical Corrosion Behaviors of Amorphous and Nanocrystalline Fe-Based Alloys

  • LI Xiang ,
  • YAN Biao ,
  • DONG Peng
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  • (Shanghai Key Lab of Metal Functional Materials,School of Materials Sciences and Engineering,Tongji University,Shanghai 200092,China

Received date: 2009-08-28

  Revised date: 2009-08-28

  Online published: 2009-08-28

摘要

应用单辊甩带法制备非晶态Fe78Si13B9和Fe73.5Si13.5B9Nb3Cu1薄带,并以非晶晶化退火法制备出纳米晶Fe73.5Si13.5B9Nb3Cu1薄带.利用X射线衍射(XRD)仪和示差扫描量热计(DSC)对该非晶薄带的非晶特性及其晶化过程进行了研究.并用电化学极化曲线的方法和电化学阻抗技术研究了非晶态Fe78Si13B9和纳米晶Fe73.5Si13.5B9Nb3Cu1合金在1mol/LNaOH溶液里的电化学腐蚀行为,用SEM对极化测试后的试样形貌进行了观察;同时还研究了不同的热处理温度对材料结构及在1mol/LNaOH溶液里耐腐蚀性能的影响.结果表明,该非晶薄带的晶化过程分为两步;纳米晶比非晶合金的耐腐蚀性要好;且随着热处理温度的升高,非晶和纳米晶的耐腐蚀性能都得到提高.

本文引用格式

李翔 , 严彪 , 董鹏 . Fe基非晶和纳米晶合金晶化及电化学腐蚀行为[J]. 电化学, 2009 , 15(3) : 269 -274 . DOI: 10.61558/2993-074X.1993

Abstract

In this study,amorphous Fe78Si13B9 and Fe73.5Si13.5B9Nb3Cu1 ribbons were prepared by the chill block melt-spinning process and nanocrystalline Fe73.5Si13.5B9Nb3Cu1 ribbons were obtained by annealing. The amorphous ribbons and their crystallization processes were identified by differential scanning calorimeter (DSC) and X-ray diffraction (XRD). A comparative study of the electrochemical corrosion behaviors of Fe78Si13B9 and Fe73.5Si13.5B9Nb3Cu1 amorphous and nanocrystallized alloys was performed by linear polarization method and electrochemical impedance spectroscopy (EIS) in 1mol/L NaOH solutions. The photographs of the samples after potentiodynamic polarization were observed by SEM. The influence of heat treatment on the alloys structure and corrosion resistance in 1mol/L NaOH solutions was investigated. The results show that the crystallization of amorphous ribbons occurs in two steps,nanocrystalline alloys have a higher corrosion resistance than amorphous alloys,and the corrosion resistances of amorphous and nanocrystalline alloys increase as thermal treatment temperature rises.
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