安全、健康和环境2025，Vol.25Issue(12)：58-65,8.DOI:10.3969/j.issn.1672-7932.2025.12.009
多种低合金钢在Cl-介质中的腐蚀电化学行为与合金成分耐蚀作用研究
Study on the Corrosion Electrochemical Behavior of Various Low-Alloy Steels in Cl-Containing Media and the Corrosion Resistance of Alloy Composition
摘要
Abstract
Preventing high-salt corrosion is a critical technical factor in ensuring the structural integrity of e-quipment materials and maintaining stable operation of continuous production processes,holding significant im-portance for the refining and chemical industries.In response to the challenges posed by high-salt corrosive en-vironments in these industries,this study systematically investigated the synergistic effects of various alloying el-ements—such as Mn,P,S,Cu,Nb,Ni,Cr,Mo,Ti,Zr,and N—as well as gradient NaCl concentrations,on the corrosion behavior of low-alloy steels under room temperature conditions.Through Tafel polarization curve analysis and electrochemical impedance spectroscopy(EIS)tests,combined with Spearman correlation analy-sis,the corrosion mechanisms under the interaction of alloying elements and environmental factors were elucida-ted.The results indicated that the corrosion current density of 09Mn and AH36 steels in NaCl solutions of differ-ent concentrations remained consistently below 0.5×10-4 A·cm-2,demonstrating excellent corrosion resist-ance.The contents of P,S,Mo,Nb,Zr,and N in both were relatively high,which was consistent with those of Spearman analysis.Specifically,Mn,Nb,Cr,Zr,and N exhibit a strong positive correlation with the self-corrosion potential,whereas P and S show a strong negative correlation.Mo demonstrates a strong negative cor-relation with the corrosion current density.This study provides both experimental evidence and theoretical sup-port for the material design and optimization of highly corrosion-resistant low-alloy steels.关键词
低合金钢/高盐腐蚀/耐蚀性/电化学分析/Spearman相关性分析Key words
low alloy steel/high-salt corrosion/corrosion resistance/electrochemical analysis,Spearman analysis分类
资源环境引用本文复制引用
Men Jinghui,Wu Yang,Shen Zhiyuan,Chen Mindong..多种低合金钢在Cl-介质中的腐蚀电化学行为与合金成分耐蚀作用研究[J].安全、健康和环境,2025,25(12):58-65,8.基金项目
国家自然科学基金(52201098),基于腐蚀大数据的炼化装备低合金钢耐蚀性优化理论研究 （52201098）
中国石化科技部项目(322028),炼化装置低温腐蚀微合金化协同防护技术. （322028）
