文献类型：期刊文献

英文题名：Galvanic corrosion of Q345 steel in seawater under varying dissolved oxygen conditions

作者：Liu, Wenjuan[1];Yuan, Jiandu[1];Hu, Jiezhen[2];Deng, Peichang[3];Cao, Xinghui[1,4]

机构：[1]Xinjiang Inst Technol, Coll Energy & Chem Engn, Aksu, Peoples R China;[2]Guangdong Ocean Univ, Coll Mech Engn, Zhanjiang, Peoples R China;[3]Guangdong Ocean Univ, Coll Chem & Environm, Zhanjiang, Peoples R China;[4]Xinjiang Inst Technol, Xinjiang Key Lab New Energy & Energy Storage Techn, Aksu, Peoples R China

年份：2025

外文期刊名：CORROSION ENGINEERING SCIENCE AND TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:001396915100001)、、WOS

基金：The authors are grateful for the financial support from the Natural Science Foundation of China (No. 51801033) and the Natural Science Foundation of Guangdong Province China (2021A1515110382).

语种：英文

外文关键词：Q345 steel; DOC; seawater; the electrically connected state; galvanic coupling corrosion; corrosion protection

外文摘要：The galvanic coupling corrosion behaviour of Q345 steel in seawater with different dissolved oxygen contents (DOC) was investigated in this paper by using self-designed detachable electrodes fabricated as chain electrodes, and by using immersion and electrochemical methods in combination with macroscopic and microscopic corrosion morphology. Compared with the corrosion of the chain electrode in the non-electrically connected state, in the electrically connected state, the corrosion current densities of the corresponding electrodes were smaller and the Rp values were larger when the DOC was 8.50, 7.50 and 5.50 mg L-1, indicating that the corrosion reaction was mainly a self-corrosion reaction when the DOC was 8.50, 7.50 and 5.50 mg L-1. When DOC is 9.50 and 6.50 mg L-1, the corrosion current density of the corresponding electrode was larger, the Rp value was smaller, the corrosion products on the surface of the electrode had a loose structure, the relative content of iron was higher, and the corrosion reaction was mainly galvanic coupling corrosion reaction.