结构状态对全金属Fe基非晶合金腐蚀性能的影响

材料导报

2022, Vol. 36

Issue (Z1): 21120217-5

金属与金属基复合材料

结构状态对全金属Fe基非晶合金腐蚀性能的影响

胡家富¹, 谢春晓², 陶平均¹

1 广东工业大学材料与能源学院,广州 510006
2 东莞理工学院机械工程学院,广东东莞 523808

Effect of Structural State on Corrosion Properties of All Metal Fe Based Amorphous Alloys

HU Jiafu¹, XIE Chunxiao², TAO Pingjun¹

1 School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
2 College of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, Guangdong, China

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摘要采用单辊甩带法制备(Fe_0.52Co_0.18Ni_0.30)₇₃Cr₁₇Zr₁₀全金属铁基非晶合金,对其进行不同的结构弛豫处理,即在低于玻璃转化温度(T_g=825 K)下 725 K进行 0 h、0.5 h、2 h、4 h、10 h 真空退火热处理,获得不同结构状态的非晶合金,并在玻璃转化温度以上 925 K 进行真空晶化处理,保温 10 min得到晶态(Fe_0.52Co_0.18Ni_0.30)₇₃Cr₁₇Zr₁₀。用XRD测试试样物相组成,并用DSC分析热力学参数,得出结构弛豫焓(ΔH_fv),然后计算相应的自由体积含量(V₀);用电化学工作站测试试样在3.5%(质量分数,下同)NaCl溶液中的电化学腐蚀性能;用SEM观察试样腐蚀形貌,并用EDS测试元素种类和含量。结果表明,一定程度的结构弛豫能降低非晶合金中的自由体积量,使原子堆积更加紧密、结构更加稳定,从而提高非晶合金的抗均匀腐蚀性能和抗点蚀性能,其中0.5 h和2 h时结构弛豫的效果最佳;而结晶态和长时间结构弛豫则会提高非晶合金的点蚀敏感性,降低钝化膜致密度,从而加剧腐蚀。

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关键词: 结构状态全金属铁基非晶合金结构弛豫晶化处理腐蚀性能

Abstract: (Fe_0.52Co_0.18Ni_0.30)₇₃Cr₁₇Zr₁₀ all-metal Fe-based amorphous alloy was fabricated by means of melt spinning and subjected to different structural relaxation treatments. Vacuum annealing heat treatment for 0 h, 0.5 h, 2 h, 4 h and 10 h at 725 K below the glass transition temperature(T_g=825 K) was carried out so as to obtain amorphous alloys with different structural states.Vacuum crystallization was carried out at 925 K above the glass transition temperature and then holding for 10 min so as to obtain the crystalline (Fe_0.52Co_0.18Ni_0.30)₇₃Cr₁₇Zr₁₀. The phase composition of the samples was tested by XRD, the thermodynamic parameters were analyzed by DSC to obtain the structural relaxation enthalpy (ΔH_fv),and then the content of corresponding free volume(V₀) was calculated. The electrochemical corrosion resistance in 3.5wt% NaCl solution was tested by electrochemical workstation.The corrosion morphology was observed by SEM and the type and content of elements were tested by EDS. The results show that a certain structural relaxation can reduce the free volume in the amorphous alloy, which makes the atomic stacking closer and the structure more stable so as to improve the uniform corrosion resistance and pitting corrosion resistance, among which structural relaxation for 0.5 h and 2 h has the best effect. The crystalline and long-time structural relaxation will improve the pitting corrosion sensitivity of amorphous alloys, reduce the density of passive film, and aggravate the corrosion.

Key words: structural state all-metal Fe-based amorphous alloy structural relaxation crystallization treatment corrosion property

出版日期: 2022-06-05 发布日期: 2022-06-08

ZTFLH:

TG171

基金资助: 国家自然科学基金(5217010020)

通讯作者: xiechx@dgut.edu.cn;pjtao@gdut.edu.cn

作者简介: 胡家富,2019年6月于广东工业大学获得工学学士学位。现为广东工业大学材料与能源学院硕士研究生,在陶平均教授的指导下进行研究。目前主要研究方向为FeCoNiCrZr全金属铁基非晶合金的腐蚀行为。
谢春晓,东莞理工学院机械工程学院副教授。2003年南方冶金学院本科毕业,2007年江西理工大学硕士毕业,2013年广东工业大学材料加工工程专业博士毕业后到东莞理工学院工作至今。目前主要从事铁基非晶纳米晶、高熵合金的基础及应用技术和有色合金成型加工等方面的研究工作。发表论文10余篇,包括Journal of Non-crystalline Solids,Journal of Alloys and Compounds等。
陶平均,广东工业大学材料与能源学院教授、硕士研究生导师。2002 年大连交通大学焊接专业本科毕业,2004 —2009 年广东工业大学材料学专业硕博连读,毕业后留校工作至今。目前主要从事新型纳米与非晶功能材料、先进金属材料、磁功能材料及器件等研究工作。发表学术论文 50 余篇,包括International Journal of Hydrogen Energy,Materials and Design,Materials Letters,Journal of Alloys and Compounds,Surface & Coatings Technology等。

引用本文:

胡家富, 谢春晓, 陶平均. 结构状态对全金属Fe基非晶合金腐蚀性能的影响[J]. 材料导报, 2022, 36(Z1): 21120217-5.
HU Jiafu, XIE Chunxiao, TAO Pingjun. Effect of Structural State on Corrosion Properties of All Metal Fe Based Amorphous Alloys. Materials Reports, 2022, 36(Z1): 21120217-5.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2022/V36/IZ1/21120217

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