Effect of Pre-Oxidation Treatment on Corrosion Resistance of FeCoSiBPC Amorphous Alloy

Materials

Shaoxiong Zhou¹  Jingcheng Lin²  Xuelian Li²  Xia Cao³  Zongzhen Li⁴  Guangqiang Zhang⁴  Xidong Hui⁵  Wei Zheng⁵  Qian Zhang⁵ 

[1] Central Iron and Steel Research Institute, Beijing 100081, China;Department of Electrical & Information Engineering, Shandong University, Weihai 264209, China;Department of Mechanics and Surface Engineering, Changzhou Institute of Technology, Changzhou 213032, China;Jiangsu JITRI Advanced Energy Materials Research Institute Co., Ltd., Changzhou 213001, China;State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;

关键词: amorphous alloy;    pre-oxidation;    corrosion resistance;    oxidation layer;   

DOI  :  10.3390/ma15093206

来源: DOAJ

【 摘 要 】

In this paper, the corrosion resistance of FeCoSiBPC amorphous alloy after pre-oxidation and non-oxidation heat treatment is investigated. The corrosion behaviors of Fe₈₀Co₃Si₃B₁₀P₁C₃ amorphous alloys in 1 mol/L NaCl solution were investigated by the electrochemical workstation. The pre-oxidation heat treatment can improve the corrosion resistance of FeCoSiBPC amorphous alloy through an increase in the Ecorr value from −0.736 to −0.668 V, which makes it easy to reach a passive state. The corroded morphology and products of amorphous alloys were tested by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The SEM/TEM analysis showed that, after pre-oxidation treatment, the oxide layer was divided into two layers: the inner layer was amorphous, the outer layer appeared crystalline, and the main oxide was Fe₂O₃. During the oxidation process, Co and P elements diffused from the inner layer to the outer layer, forming phosphorus and cobalt oxides with high corrosion resistance on the surface of the ribbon, thereby improving the corrosion resistance of the ribbon.

【 授权许可】

Unknown