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Effect of hydrostatic pressure on galvanic corrosion of low-alloy steel in simulated deep-sea environments
Corrosion Engineering, Science and Technology ( IF 1.8 ) Pub Date : 2022-09-06 , DOI: 10.1080/1478422x.2022.2119006
Yuxin Wang 1 , Fulei Yan 1 , Bo Wu 1 , Jianhua Wu 1 , Kefeng Hu 2 , Xianbin Hou 1, 3 , Leyang Dai 1
Affiliation  

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.



中文翻译:

模拟深海环境中静水压力对低合金钢电偶腐蚀的影响

摘要

为了研究高静水压力对深海环境中低合金钢腐蚀的影响。采用电化学、失重和形貌观察等方法研究了907A钢、921A钢和1#钢的单金属体系和三金属耦合体系在不同静水压力下的电化学腐蚀行为。结果表明,高静水压力通过改变腐蚀产物的成分和形貌促进了低合金钢的腐蚀。此外,低电位差(<60 mV)的电偶之间也存在严重的电偶腐蚀,907A钢作为三金属耦合体系的阳极,921A钢和1#钢作为阴极。电偶耦合效应加速了 907A 钢作为阳极金属的点蚀。

更新日期:2022-09-06
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