Song Ziqi, Wang Zhaoxuan, Chen Qi, Qi Zhigang, Kim Ki Buem, Wang Weimin
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea.
Materials (Basel). 2023 Oct 10;16(20):6630. doi: 10.3390/ma16206630.
The effect of the Cr element on the corrosion behavior of as-spun FeCrBSiNb ribbons with = 0, 7.2, 21.6, and 36 in 3.5% NaCl solution were investigated in this work. The results show that the glass formability of the alloys can be increased as Cr content () is added up to 21.6 at.%. When reaches 36 at.%, some nanocrystals appear in the as-spun ribbon. With increasing content, the corrosion resistances of as-spun Fe-based ribbons are continually improved as well as their hardness properties; during the polarization test, their passive film shows an increase first and then a decrease, with the highest pitting potential as = 7.2 at.%, which is confirmed by an XPS test. The dense passivation film, composed of CrO and [CrO(OH), HO], can reduce the number of corrosion pits on the sample surface due to chloride corrosion and possibly be deteriorated by the overdosed CrFeB phase. This work can help us to design and prepare the highly corrosion-resistant Fe-based alloys.
本文研究了Cr元素对含Cr量（分别为0、7.2、21.6和36at.%）的快淬FeCrBSiNb薄带在3.5%NaCl溶液中腐蚀行为的影响。结果表明，当Cr含量（）增加到21.6at.%时，合金的玻璃形成能力增强。当达到36at.%时，快淬薄带中出现了一些纳米晶体。随着含量的增加，快淬铁基薄带的耐蚀性及其硬度性能不断提高；在极化试验中，其钝化膜先增大后减小，点蚀电位在=7.2at.%时最高，XPS测试证实了这一点。由CrO和[CrO(OH),HO]组成的致密钝化膜可减少样品表面因氯化物腐蚀产生的腐蚀坑数量，过量的CrFeB相可能会使其劣化。这项工作有助于我们设计和制备高耐蚀性铁基合金。
