Zhang Qian, Hui Xidong, Li Zongzhen, Zhang Guangqiang, Lin Jingcheng, Li Xuelian, Zheng Wei, Cao Xia, Zhou Shaoxiong
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China.
Central Iron and Steel Research Institute, Beijing 100081, China.
Materials (Basel). 2022 Apr 29;15(9):3206. doi: 10.3390/ma15093206.
In this paper, the corrosion resistance of FeCoSiBPC amorphous alloy after pre-oxidation and non-oxidation heat treatment is investigated. The corrosion behaviors of FeCoSiBPC 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 FeO. 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.
本文研究了预氧化和未氧化热处理后FeCoSiBPC非晶合金的耐蚀性。采用电化学工作站研究了FeCoSiBPC非晶合金在1 mol/L NaCl溶液中的腐蚀行为。预氧化热处理可通过将Ecorr值从-0.736 V提高到-0.668 V来提高FeCoSiBPC非晶合金的耐蚀性,这使其易于达到钝化状态。通过扫描电子显微镜(SEM)和透射电子显微镜(TEM)对非晶合金的腐蚀形貌和产物进行了测试。SEM/TEM分析表明,预氧化处理后,氧化层分为两层:内层为非晶态,外层为晶态,主要氧化物为FeO。在氧化过程中,Co和P元素从内层扩散到外层,在薄带表面形成具有高耐蚀性的磷化物和钴氧化物,从而提高了薄带的耐蚀性。