DP590钢在3种盐溶液蒸汽中的腐蚀行为
Corrosion Behavior of DP590 Steel in Vapor of Three Salt Solutions
摘 要
在3种盐(CaCl2、MgCl2和NaCl)溶液蒸汽中对汽车用高强钢DP590进行了腐蚀试验,通过宏、微观形貌观察,增重法,电化学测试等方法研究了DP590钢的腐蚀行为。结果表明:在盐溶液蒸汽中腐蚀40 h后,DP590钢板表面均出现了不同程度的红锈,腐蚀质量增加随着盐含量的增加而增大;钢板表面的腐蚀产物主要为Fe3O4,还包括少量Fe2O3、FeO (OH)等;随盐含量的增加,DP590钢的自腐蚀电位均负移,腐蚀电流密度增大,其耐腐蚀性能减弱。
蒸汽
极化曲线
腐蚀行为
salt solution
vapor
polarization curve
corrosion behavior
Abstract
Corrosion tests were carried out on high-strength steel DP590 for automobiles in three kinds of salt solution vapor of CaCl2、MgCl2 and NaCl, and the corrosion behavior of DP590 steel was studied by observation of macro and micro morphology, weight gain method and electrochemical testing. The results show that red rust with different degrees appeared on the surface of DP590 steel corroded in the salt solution vapor for 40 h. As the salt concentration increased, the corrosion mass gain of DP590 steel increased. The corrosion products on the surface of the steel were Fe3O4 mainly, and a small amount of Fe2O3, FeO(OH). With the increase of salt concentration, the free corrosion potential of DP590 steel shifted negatively, and the corrosion current density increased, indicating the decrease of corrosion resistance of DP590 steel.
中图分类号 TG172 DOI 10.11973/fsyfh-202208008
所属栏目 试验研究
基金项目
收稿日期 2022/1/17
修改稿日期
网络出版日期
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引用该论文: WANG Shanshan,YANG Zhiqiang,ZHAO Mengying,CHENG Xiaojuan,HUANG Yusen,ZHANG Hongqian,LIU Yongzhuang. Corrosion Behavior of DP590 Steel in Vapor of Three Salt Solutions[J]. Corrosion & Protection, 2022, 43(8): 42
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参考文献
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【2】PANDRE S,KOTKUNDE N,TAKALKAR P,et al.Flow stress behavior,constitutive modeling,and microstructural characteristics of DP 590 steel at elevated temperatures .Journal of Materials Engineering and Performance,2019,28(12):7565-7581.
【3】YUAN X J,LI C,CHEN J B,et al.Resistance spot welding of dissimilar DP600 and DC54D steels .Journal of Materials Processing Technology,2017,239:31-41.
【4】PANDRE S,MORCHHALE A,KOTKUNDE N,et al.Influence of processing temperature on formability of thin-rolled DP590 steel sheet .Materials and Manufacturing Processes,2020,35(8):901-909.
【5】KHONDKER R,MERTENS A,MCDERMID J R.Effect of annealing atmosphere on the galvanizing behavior of a dual-phase steel .Materials Science and Engineering:A,2007,463(1/2):157-165.
【6】徐接旺,郭太雄,董学强,等.防锈油涂油量对DP590双相钢表面状态及耐蚀性能的影响 .电镀与涂饰,2021,40(9):715-719.
【7】王凤平.金属腐蚀与防护实验 .北京:化学工业出版社,2015.
【8】魏兵,杨奕,韩斌,等.层流冷却水Cl-浓度和pH值对热轧带钢表面质量的影响 .轧钢,2016,33(2):20-23.
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