碱性含Cl环境下Cu合金化对低合金钢耐蚀性的影响  

Effect of Cu Alloying on Corrosion Resistance of Low Alloy Steel in Alkaline Cl Containing Environment

作　　者：王毅 周君君[2] 张天翼 WANG Yi;ZHOU Junjun;ZHANG Tianyi(School of Mechanical and Equipment Engineering,Hebei University of Engineering,Handan 056038,China;Hebei University of Engineering,Handan 056038,China;School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]河北工程大学机械与装备工程学院,河北邯郸056038 [2]河北工程大学,河北邯郸056038 [3]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《热加工工艺》2025年第5期121-126,共6页Hot Working Technology

基　　金：河北省自然科学基金青年项目(E2023502105);中国博士后面上项目(2023M741155)。

摘　　要：对低合金钢和含铜低合金钢进行了金相形貌观察、电化学测试、浸泡实验和电化学阻抗谱测试,对比分析了这两种钢的组织、极化性能、浸泡后腐蚀产物的形貌及成分,系统研究了模拟盐碱土壤环境(含Cl的饱和Ca(OH)_(2)溶液)下Cu合金化对低合金钢耐蚀性及腐蚀产物保护性的影响机制。结果表明,Cu的添加增加了低合金钢在环境中的腐蚀电位和破钝电位,降低了维钝电流密度。Cu合金化低合金钢的浸泡后腐蚀产物表现出更致密的形貌及更高的稳定腐蚀产物含量,促使腐蚀产物保护性增加,表现为蚀坑深度降低。Cu添加促进试样试样容抗弧半径和低频模值|Z|0.01的增加,这与锈层中Fe2O3稳定物相含量增加有关。The microstructure observation,electrochemical test,immersion test and electrochemical impedance spectroscopy(EIS)test of the low alloy steel and copper-containing low alloy steel were carried out,and the microstructure,polarization property,the morphology and composition of the corrosion products after immersion test of the two steels were compared and analyzed.The influence mechanism of Cu alloying on the corrosion resistance and protectiveness of corrosion products of low alloy steel under simulated saline alkali environment(saturated Ca(OH)_(2)solution containing Cl)was systematically investigated.The results show that the addition of Cu increases the corrosion potential and passivation potential of low alloy steel in the environment,and reduces the passivation current density.The corrosion products of low alloy steel with Cu alloying after immersion exhibit a denser morphology and higher content of stable corrosion products,which increases the protective properties of corrosion products and results in a decrease in pit depth.The addition of Cu promotes an increase in the capacitance arc radius and low-frequency modulus|Z|0.01 of the sample,which is related to the increase of the stable Fe2O3 phase content in the rust layer.

关 键 词：低合金钢 Cu合金化 耐蚀性 碱性含Cl环境 

分 类 号：TG172.6[金属学及工艺—金属表面处理]