Sand impingements on cathodic protection of marine carbon steel in natural sea water

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

Corrosion Engineering, Science and Technology Pub Date : 2022-10-01 DOI:10.1080/1478422X.2022.2128708

Shan Gao, Xiaohui Zou, Yubin Zhao, Hao Chen, Qiliang Zhang, Yi Huang, Yunze Xu

引用次数: 1

Abstract

ABSTRACT In this work, the influence of sand impingements on cathodic protection (CP) of marine carbon steel in natural sea water was studied in comparison with the CP performances in static and flowing sea water without sand particles. Results show that the propagation of local active anodic dissolution at the steel inclusions could be totally inhibited by providing sufficient cathodic current in the sea water free of sand particles. However, the local ‘CP shielding’, potential fluctuation and sand impingements would enhance the anodic dissolution at inclusions, thus leading to the occurrence of erosion-corrosion under CP. The negative shift of the CP potential could not retard the propagation of erosion-corrosion pits under sand impingements. The synergy of erosion and corrosion might result in long-term failure of local CP.

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天然海水中沙对船用碳钢阴极保护的影响

摘要在本工作中，通过比较无砂粒的静态和流动海水中的阴极保护性能，研究了天然海水中砂粒撞击对船用碳钢阴极保护的影响。结果表明，在没有砂粒的海水中，通过提供足够的阴极电流，可以完全抑制夹杂物处局部活性阳极溶解的传播。然而，局部“CP屏蔽”、电位波动和砂粒撞击会增强夹杂物处的阳极溶解，从而导致CP下侵蚀腐蚀的发生。CP电位的负移不能阻止砂粒撞击下侵蚀腐蚀坑的传播。侵蚀和腐蚀的协同作用可能导致局部CP的长期失效。

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.