文献类型：期刊文献

英文题名：Research on the effect of Cu addition on the corrosion resistance of low carbon low alloy steel

作者：Wang, Jinliang[1,2,3];Liu, Yujie[1,3];Xi, Xiaohui[1,2,3];Liu, Qiang[2,3];Chen, Liqing[4]

机构：[1]Guangdong Ocean Univ, Zhanjiang Key Lab Corros & Protect Ocean Engn Equi, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Guangdong Prov Key Lab Intelligent Equipment South, Zhanjiang 524088, Peoples R China;[3]Guangdong Engn Technol Res Ctr Ocean Equipment & M, Zhanjiang 524088, Peoples R China;[4]Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China

年份：2025

卷号：36

起止页码：10507

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：SCI-EXPANDED(收录号：WOS:001541996900001)、、WOS

基金：This work is supported by the National Natural Science Foundation of China (Grant No: 52401141), Guangdong Basic and Applied Basic Research Foundation (Grant No: 2024A1515010726), the Science and Technology Projects of Zhanjiang (Grant No: 2021E05003 and 2022A01031), the program for scientific research start-up funds of Guangdong Ocean University (Grant No: 060302062306 and 060302062102) and the Innovation Team Project for Ordinary Universities in Guangdong Province (Grant No: 2024KCXTD041).

语种：英文

外文关键词：Low carbon low alloy steel; Cu; Corrosion resistance; Retained austenite; Grain boundary; Internal stress; Cu-rich precipitate

外文摘要：Cu has been regarded as an important element to improve the corrosion resistance of steels, but little was known about the role mechanism of Cu addition in low carbon low alloy steel. Therefore, on the basis of a newlydeveloped low carbon low alloy steel designed by the author, the effects of Cu addition on microstructure and corrosion resistance were studied in detail through microstructural characterization, accelerated corrosion test and electrochemical test. The results showed that Cu addition increased the volume fraction of retained austenite, significantly improving the compactness of corrosion film and the stability of boundaries, and thus decreasing the corrosion rate due to the inhibition of Cl- into the matrix and intergranular corrosion, respectively. Also, Cu addition promoted the formation of CuFeO2, CuO, low angle grain boundary (LAGB) and evenly distributed internal stress. Among them, CuFeO2 and CuO concentrated at the interface between inner layer and matrix improved the protectiveness of corrosion film. The LAGB and evenly distributed internal stress effectively impeded the crack of intergranular corrosion. In addition, Cu addition increased the content of Cu-rich precipitates with FCC structure, which increased the interface energy between Cu-rich precipitates and steel matrix, accordingly resulting in a higher surface Volta potential. As a consequence, the uneven distribution of potential on steel surface deteriorated the corrosion resistance. Under the combination of multi-factors, a higher corrosion resistance was achieved in Cu-bearing low carbon low alloy steel.