郑传奇，李涛，薛仁杰
(内蒙古科技大学 材料与冶金学院，内蒙古包头 014010)
关键词：低碳高强度钢；海洋大气腐蚀；周期浸润腐蚀试验；极化曲线
中图分类号：TG171文献标志码：A
摘要：采用室内周期浸润腐蚀试验模拟海洋大气环境下低碳高强度钢的腐蚀，研究了22SiMn2TiB钢的海洋大气腐蚀行为及规律。通过数码相机和SEM观察了试样除锈前后的表面形貌，采用XRD分析了腐蚀产物的成分，采用极化曲线法和失重法分析了电化学行为和腐蚀动力学规律。结果表明，22SiMn2TiB钢在海洋大气环境下的腐蚀为均匀腐蚀，腐蚀速率先增大后减小。随着腐蚀时间的延长，实验钢的自腐蚀电位提高，极化电流密度降低，锈层对基体起到了保护作用。
Research on marine atmospheric corrosion behavior of low carbon highstrength structural steel
ZHENG Chuan-qi, LI Tao, XUERen-jie
(Materials and Metallurgy School, Inner Mongolia University of Science & Technology, Baotou014010, China)
Key words: low carbon high strength steel; marine atmosphericcorrosion; cycle immersion corrosion experiment;
polarization curve
Abstract:The experiment of cycle wet-dry immersion was used to simulate the corrosionbehavior of low carbon highstrength steel in marine atmospheric environment, and the corrosion processes of 22SiMn2TiB steel were researched. The surface morphology of the samples withand without rust were observed by digital camera and SEM. The composition ofcorrosion products, electrochemicalbehavior and corrosion kinetics were analysed by XRD, polarization curve methodand weightlessness method. The results show that，the corrosion of 22SiMn2TiB steel in marine atmosphericenvironment was uniform and the corrosion rate first increased and then decreased.The corrosion potential wasenhanced and the corrosion current density was reduced with the extension ofcorrosion time due to the protective effect of rust layer.