Corrosion behaviour of Ni-based alloy Inconel 740H in supercritical carbon dioxide at 650–700°C

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Engineering, Science and Technology Pub Date : 2022-12-20 DOI:10.1080/1478422X.2022.2157534

Bo-Qi Xiao, Naiqiang Zhang, Kaiyang Li, Zhongliang Zhu, Tianyi Zhang, Mi Zhou

引用次数: 3

Abstract

ABSTRACT Corrosion tests of Ni-based alloy Inconel 740H were carried out in supercritical carbon dioxide (S-CO2) at 650–700°C under 25 MPa. The corrosion kinetics were measured by weight change as a function of time, and the surface oxide layers were characterised and identified by a series of characterisation methods. It is found that Inconel 740H experienced general oxidation, localised exfoliation and internal oxidation. A dense Cr2O3 oxide scale rapidly formed on the surface of Inconel 740H at 650–700°C, resulting in good general corrosion resistance. Nodular oxidation was triggered by Ti-rich and Nb-rich oxides. Internal oxidation selectively oxidised Al. The causes of oxide-induced exfoliation are discussed.

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镍基合金Inconel 740H在650 ~ 700℃超临界二氧化碳中的腐蚀行为

摘要镍基合金铬镍铁合金740H在650–700°C、25 MPa。通过重量随时间的变化来测量腐蚀动力学，并通过一系列表征方法对表面氧化层进行表征和鉴定。发现铬镍铁合金740H经历了一般氧化、局部剥落和内部氧化。在650–700°C下，铬镍铁合金740H表面迅速形成致密的Cr2O3氧化皮，具有良好的整体耐腐蚀性。富Ti和富Nb的氧化物触发了结核状氧化。内氧化选择性地氧化了Al。讨论了氧化物引起剥离的原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Engineering, Science and Technology 工程技术-材料科学：综合

CiteScore

3.20

自引率

5.60%

发文量

审稿时长

3.4 months

期刊介绍： Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.