文献类型：期刊文献

英文题名：Experiment and numerical analysis model of the galvanic corrosion of NiCrMoV welded joint

作者：Zhang, Qiang[1];Huang, Yuhui[1];Cang, Yu[1];Xuan, Fu-Zhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China

年份：2025

卷号：524

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20251118054988);WOS:【SCI-EXPANDED(收录号:WOS:001448101900001)】；

基金：This work was financially sponsored by National Natural Science Foundation of China (Grant No 52375147) .

语种：英文

外文关键词：Welded joint; Galvanic corrosion; Polarization; EIS; Immersion test; FEM

摘要：The galvanic corrosion of the 25Cr2Ni2MoV welded joint was studied by potentiodynamic polarization, electrochemical impedance spectroscopy test (EIS), and immersion test in different chloride ion concentrations. The results showed that the corrosion sensitivity of welded metal (WM) is greater than that of base metal (BM), which enhances the galvanic corrosion of welded joints. The corrosion depth increased with the chloride ion concentration growth, accompanying the film broken, and the cathode surface reaction transitioned from electrochemical activation control to diffusion control. A finite element model (FEM) of galvanic corrosion with corrosion products was established using the electrochemical parameters measured by the corrosion test. The results showed that the FEM simulation can effectively simulate the galvanic corrosion behavior and provides a basis for predicting the corrosion rate and the deposition products.