预氧化GH4169合金在中温固态NaCl和O2 + H2O气氛中的腐蚀行为研究

doi:10.11902/1005.4537.2024.166

中国腐蚀与防护学报

2025, Vol. 45

Issue (1): 182-190 CSTR: 32134.14.1005.4537.2024.166 DOI: 10.11902/1005.4537.2024.166

研究报告

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预氧化GH4169合金在中温固态NaCl和O₂ + H₂O气氛中的腐蚀行为研究

张伟东¹, 崔宇²(

), 刘莉¹, 王福会¹

1 东北大学腐蚀与防护中心沈阳 110819
2 中国科学院金属研究所师昌绪先进材料创新中心沈阳 110016

Corrosion Behavior of Pre-oxidized GH4169 Alloy Beneath Solid NaCl Deposit Film in Wet Oxygen Flow at 600 ^oC

ZHANG Weidong¹, CUI Yu²(

), LIU Li¹, WANG Fuhui¹

1 Corrosion and Protection Center, Northeastern University, Shenyang 110819, China
2 Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

张伟东, 崔宇, 刘莉, 王福会. 预氧化GH4169合金在中温固态NaCl和O₂ + H₂O气氛中的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2025, 45(1): 182-190.
Weidong ZHANG, Yu CUI, Li LIU, Fuhui WANG. Corrosion Behavior of Pre-oxidized GH4169 Alloy Beneath Solid NaCl Deposit Film in Wet Oxygen Flow at 600 ^oC[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(1): 182-190.

全文: PDF(20188 KB) HTML

摘要:

利用氧化动力学测试，扫描电子显微镜(SEM)，X射线衍射仪(XRD)和透射电子显微镜(TEM)等分析技术，系统研究了预氧化后的GH4169合金在中温NaCl和O₂ + H₂O气氛中的腐蚀行为。结果表明，GH4169合金预氧化形成了Cr₂O₃/Nb₂O₅为主的连续氧化膜，在中温盐水环境下腐蚀5 h后氧化膜被严重破坏，形成了主要由NiFe₂O₄、NaNbO₃、Na₂CrO₄及残留Cr₂O₃构成的腐蚀产物膜。详细讨论了预氧化GH4169合金在中温固态NaCl和O₂ + H₂O气氛下的腐蚀机制以及预氧化膜破坏的过程。

关键词 ：预氧化, 固态NaCl和水蒸汽, 中温

Abstract：

The corrosion behavior of pre-oxidized GH4169 alloy beneath a solid NaCl deposit film in flowing water vapor containing O₂ at 600 ^oC was investigated by means of oxidation kinetics measurement, scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM) in the aspects of corrosion kinetics, morphology and phase composition of corrosion products. The results indicate that a continuous oxide scale composed mainly of Cr₂O₃/Nb₂O₅ was formed by pre-oxidation of GH4169 alloy in air at 1000 ^oC for 2 h. However, after 5 h corrosion in the above designed conditions, the pre-oxidized GH4169 alloy underwent serious corrosion, while the pre-formed oxide scale was seriously damaged, and the corrosion product scale mainly composed of NiFe₂O₄, NaNbO₃, Na₂CrO₄ and residual Cr₂O₃ was formed. Finally, the corrosion mechanism of the pre-oxidized GH4169 alloy beneath a solid NaCl deposit film in flowing water vapor containing O₂ at 600 ^oC was discussed in detail, in terms of the deterioration process of the pre-oxidation scale.

Key words： pre-oxidation solid NaCl deposit with wet O₂ medium temperature

收稿日期: 2024-05-27 32134.14.1005.4537.2024.166

ZTFLH:

TG174

基金资助:国家自然科学基金(U22A20111)

通讯作者: 崔宇，E-mail：ycui@imr.ac.cn，研究方向为海洋中温环境金属腐蚀与防护

Corresponding author: CUI Yu, E-mail: ycui@imr.ac.cn

作者简介: 张伟东，男，1989年生，博士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2024.166 或 https://www.jcscp.org/CN/Y2025/V45/I1/182

图1 GH4169 合金在900 ℃预氧化10 h后表面形貌和相分析结果

图2 GH4169 合金在900 ℃预氧化10 h表面形成的氧化膜TEM分析结果

图3 预氧化GH4169合金在600 ℃下表面涂覆NaCl和O2 + H2O气氛中的腐蚀动力学

图4 预氧化不同时间的GH4169合金在600 ℃下表面涂覆NaCl和O2 + H2O气氛中腐蚀5 h后的表面形貌

图5 预氧化不同时间的GH4169合金在600 ℃下表面涂覆NaCl和O2 + H2O气氛中腐蚀5 h后的截面形貌

图6 预氧化不同时间的GH4169合金在600 ℃下表面涂覆NaCl和O2 + H2O气氛中腐蚀5 h后的XRD谱

图7 经10 h预氧化的GH4169合金在600 ℃下表面涂覆NaCl和O2 + H2O气氛下腐蚀1 h后TEM分析结果

图8 经10 h预氧化的GH4169合金表面涂覆NaCl后在600 ℃ O2 + H2O气氛下腐蚀3 h的TEM分析结果

图9 经10 h预氧化的GH4169合金表面涂覆NaCl后在600 ℃ O2 + H2O气氛下腐蚀5 h的TEM分析结果

图10 经10 h预氧化的GH4169合金表面涂覆NaCl后在600 ℃ O2 + H2O气氛下腐蚀不同时间形成的氧化膜内元素分布

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