Effect of hydrostatic pressure on galvanic corrosion of low-alloy steel in simulated deep-sea environments

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

Corrosion Engineering, Science and Technology Pub Date : 2022-09-06 DOI:10.1080/1478422X.2022.2119006

Yuxin Wang, Fulei Yan, B. Wu, Jianhua Wu, Kefeng Hu, Xianbin Hou, Leyang Dai

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Abstract

ABSTRACT In order to study the effect of high hydrostatic pressure on the corrosion of low-alloy steels in deep-sea environments. The electrochemical corrosion behavior of single-metal system and triple-metal coupled system of 907A steel, 921A steel and 1# steel under different hydrostatic pressures were studied by electrochemical, weight loss and morphology observation methods. The results show that the high hydrostatic pressure promotes the corrosion of low-alloy steel by changing the composition and morphology of corrosion products. In addition, there was also severe galvanic corrosion between the couples with a low potential difference (< 60 mV),907A steel was used as the anode of the three-metal coupled system, and 921A steel and 1# steel as the cathode. The galvanic coupling effect accelerates the pitting corrosion of 907A steel as an anode metal. When using multi-metal couplers with low potential differences, they should be protected by both coating protection and cathodic protection.

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静水压力对模拟深海环境中低合金钢电偶腐蚀的影响

摘要为了研究高静水压力对低合金钢在深海环境中腐蚀的影响。采用电化学、失重和形态观察等方法，研究了907A钢、921A钢和1#钢在不同静水压力下的单金属体系和三金属耦合体系的电化学腐蚀行为。结果表明，高静水压力通过改变腐蚀产物的成分和形态，促进了低合金钢的腐蚀。此外，电偶之间也存在严重的电偶腐蚀，电偶电位差较低（<60 mV），907A钢用作三金属耦合系统的阳极，921A钢和1#钢用作阴极。电流耦合效应加速了907A钢作为阳极金属的点蚀。当使用具有低电位差的多金属耦合器时，应通过涂层保护和阴极保护对其进行保护。

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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.