Investigation of corrosion behavior of 5Cr steel in CO₂-silty sand environment: Effects of hydrodynamic impact angles

IF 3 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping Pub Date : 2024-11-26 DOI:10.1016/j.ijpvp.2024.105369

Hai Li, Wei Liu, Wenqi Li, Longjun Chen, Bo Zhang, Pengcheng Fan, Weijian Yang, Yipu Sun

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Abstract

This study investigates the influence of impact angles on the corrosion behavior of 5Cr steel in a CO₂-silty sand environment through hydrodynamics analysis. The primary cause of degradation in 5Cr steel is the combined effect of the mechanical damage to the corrosion product film by silty sand particles and corrosive environment. The severity of damage to the corrosion product film on the 5Cr steel surface caused by silty sand particles at different impact angles, from highest to lowest, is 45°, 90°, and 0°. At an impact angle of 45°, the silty sand exerts equal tangential and normal stresses on the corrosion product film, compromising its integrity and requiring more Cr(OH)₃ for repair and stabilization, resulting in the most severe localized pitting corrosion. At impact angles of 0° and 90°, the silty sand exerts only tangential stress and normal stress on the corrosion product film, respectively. The imbalance between normal and tangential stresses at these angles results in shallower and more limited removal of corrosion products, making the destructive effect less significant than at a 45° impact angle.

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5Cr钢在CO₂-粉砂环境中的腐蚀行为研究：水动力冲击角的影响

通过流体力学分析，研究了冲击角对5Cr钢在co2 -粉砂环境中腐蚀行为的影响。导致5Cr钢退化的主要原因是粉砂颗粒对腐蚀产物膜的机械损伤和腐蚀环境的综合作用。粉砂颗粒在不同冲击角度下对5Cr钢表面腐蚀产物膜的破坏程度，从高到低依次为45°、90°、0°。在45°的冲击角下，粉砂对腐蚀产物膜施加相等的切向和法向应力，破坏其完整性，需要更多的Cr(OH)3进行修复和稳定，导致最严重的局部点蚀。在冲击角为0°和90°时，粉砂仅对腐蚀产物膜施加切向应力和法向应力。在这些角度下，法向和切向应力之间的不平衡导致腐蚀产物的去除更浅，更有限，使破坏效果不如45°冲击角时显著。

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来源期刊

International Journal of Pressure Vessels and Piping 工程技术-工程：机械

CiteScore

5.30

自引率

13.30%

发文量

208

审稿时长

17 months

期刊介绍： Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants. The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome: • Pressure vessel engineering • Structural integrity assessment • Design methods • Codes and standards • Fabrication and welding • Materials properties requirements • Inspection and quality management • Maintenance and life extension • Ageing and environmental effects • Life management Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time. International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.