【作者】 高新亮； 付贵勤； 邓志银； 朱苗勇； 曹波； 夏政海；

【Author】 Gao Xinliang;Fu Guiqin;Deng Zhiyin;Zhu Miaoyong;Cao Bo;Xia Zhenghai;School of Materials and Metallurgy, Northeastern University;R and D Center,Xiangtan Iron and Steel Co., Ltd., Hunan Valin Group;

【机构】 东北大学材料与冶金学院； 湖南华菱湘潭钢铁有限公司科技开发中心；

【摘要】 通过干湿循环加速腐蚀实验并结合光学显微镜、SEM和XRD等方法,研究了低合金耐候钢在两种模拟大气环境(海洋大气和工业大气)中的腐蚀行为和腐蚀产物的特征。实验结果表明:低合金钢在不同环境下的初期腐蚀方式不同,在含Cl-环境下,珠光体和晶界被择优腐蚀;在含HSO2-3环境下,实验钢趋于均匀腐蚀。在工业大气条件下,有利于α-FeO OH生成。提高钢中合金元素Mn和Ni的含量,在模拟海洋大气条件下,初期加速钢的腐蚀速率,后期提高钢的耐候性能;在模拟工业大气环境下,腐蚀初期和后期均有利于提高钢的耐蚀性能。更多还原

【Abstract】 Alternate wet-dry cyclic accelerated corrosion tests together with optical microscopy, SEM and XRD were employed to investigate the corrosion behavior and corrosion products of two low alloying weathering steels in two kinds of typical environments(marine environment and industrial environment). The results show that the initial corrosion behavior of low alloying weathering steel is different in two kinds of typical environment. In the early stage of corrosion, pearlite phase and boundaries are easy to be corroded in environment containing chloride ions, while uniform corrosion appears in environment containing HSO2-3. The formation of α-FeO OH is benefit in the simulated industrial environment. With increasing Ni and Mn content, the corrosion rate is accelerated at the early stage of corrosion in simulated marine environment, but the corrosion resistance of steel is improved at the later stage. The corrosion resistance of steel is improved at both the early stage and the later stage in the simulated industrial environment.更多还原