在 600 °C 湿氧气流中沉积固体氯化钠的预氧化 GH4169 合金的腐蚀行为

IF 2.9 2区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
Weidong Zhang, Yu Cui, Li Liu, Wenquan Wang, Wenzheng Chen, Rui Li, Fuhui Wang
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引用次数: 0

摘要

通过质量增益测量、X 射线衍射、扫描电子显微镜、透射电子显微镜等方法,研究了预氧化 GH4169 合金在 600 ℃ 的湿 O2 环境中,在固态 NaCl 沉积膜下暴露 20 小时后的腐蚀行为。结果表明,预氧化 GH4169 合金在腐蚀条件下会发生严重腐蚀。预形成的 Cr2O3 层逐渐被沉积的 NaCl 破坏,完整的外层 Cr2O3 下的内层 Nb2O5 层也与 NaCl 反应生成 NaNbO3。电化学测试结果证明了这一腐蚀过程中存在电化学反应。本文详细讨论了预氧化 GH4169 在 600 °C 的湿 O2 环境中固体 NaCl 沉积膜下的腐蚀行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Corrosion Behavior of Pre-oxidized GH4169 Alloy with Solid NaCl Deposited in a Wet Oxygen Flow at 600 °C

Corrosion Behavior of Pre-oxidized GH4169 Alloy with Solid NaCl Deposited in a Wet Oxygen Flow at 600 °C

The corrosion behavior of the pre-oxidized GH4169 alloy was studied after 20 h of exposure under a solid NaCl deposit film in a wet O2 environment at 600 °C by mass-gain measurements, X-ray diffraction, scanning electron microscopy, transmission electron microscopy methods. The results indicate that the pre-oxidized GH4169 alloy undergoes serious corrosion in the corrosive condition. The preformed Cr2O3 layer is gradually destroyed by deposit NaCl, and the inner Nb2O5 layer beneath the complete outer Cr2O3 layer also reacts with NaCl to form NaNbO3. The electrochemical test results testified the existence of electrochemical reactions during this corrosion process. The corrosion behavior of pre-oxidized GH4169 under a solid NaCl deposit film in a wet O2 environment at 600 °C has been discussed in detail.

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来源期刊
Acta Metallurgica Sinica-English Letters
Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
6.60
自引率
14.30%
发文量
122
审稿时长
2 months
期刊介绍: This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.
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