High-Temperature Corrosion Behavior of Fe-18Ni-12Cr-2.9Al and Fe-18Ni-12Cr-2.3Al-Nb-C Austenitic Steels Depending on Dissolved Oxygen Concentration in Static Liquid Pb at 700 °C

IF 2.1 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Oxidation of Metals Pub Date : 2024-03-07 DOI:10.1007/s11085-024-10233-2
Valentyn Tsisar, Zhangjian Zhou, Olaf Wedemeyer, Aleksandr Skrypnik, Jürgen Konys, Carsten Schroer
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Abstract

The corrosion behavior of the aluminum-alloyed austenitic steels Fe-18Ni-12Cr-2.9Al and Fe-18Ni-12Cr-2.3Al-Nb-C was investigated at 700 °C in static Pb for 1000 h as a function of the concentration of dissolved oxygen in the liquid metal. In Pb with ~ 5 × 10–9 mass % dissolved oxygen, both steels showed dissolution. Depth of corrosion averaged 67 (± 18) µm and 78 (± 25) µm for Fe-18Ni-12Cr-2.3Al-Nb-C and Fe-18Ni-12Cr-2.9Al, respectively. In Pb with higher oxidation potential of 2 × 10–6 mass %O, both steels showed protective and accelerated oxidation. The protective thin oxide film (≤ 1 µm) was composed of outermost Fe-rich, intermediate Cr-rich and inner Al-rich sublayers. The thicker oxide scale was of irregular thickness (2 ÷ 30 µm) and consisted of Fe–Cr mixed oxide with Ni-rich metallic inclusions.

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700 °C 时静态液态铅中的溶解氧浓度对 Fe-18Ni-12Cr-2.9Al 和 Fe-18Ni-12Cr-2.3Al-Nb-C 奥氏体钢高温腐蚀性能的影响
研究了铝合金奥氏体钢 Fe-18Ni-12Cr-2.9Al 和 Fe-18Ni-12Cr-2.3Al-Nb-C 在 700 °C 静态 Pb 中 1000 小时的腐蚀行为与液态金属中溶解氧浓度的函数关系。在溶解氧质量百分比为 ~ 5 × 10-9 的铅中,两种钢都出现了溶解现象。Fe-18Ni-12Cr-2.3Al-Nb-C 和 Fe-18Ni-12Cr-2.9Al 的平均腐蚀深度分别为 67 (± 18) µm 和 78 (± 25) µm。在氧化电位为 2 × 10-6 质量 %O 的较高铅中,两种钢都出现了保护性加速氧化。保护性氧化薄膜(≤ 1 µm)由最外层的富铁、中间层的富铬和内层的富铝亚层组成。较厚的氧化膜厚度不规则(2 ÷ 30 µm),由铁铬混合氧化物和富含镍的金属夹杂物组成。
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来源期刊
Oxidation of Metals
Oxidation of Metals 工程技术-冶金工程
CiteScore
5.10
自引率
9.10%
发文量
47
审稿时长
2.2 months
期刊介绍: Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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