Sb对低合金钢在上甲板环境下耐蚀性的影响  

Effect of Sb on the corrosion resistance of low alloy steel on the upper deck conditions

作　　者：刘健 李灏[2] LIU Jian1, LI Hao2(1. Suqian Jinxin Steel Rolling Co., Ltd. of Nisco, Suqian 223800, China; 2. Department of Structure Steels, Central Iron and Steel Research Institute, Beijing 100081, China)

机构地区：[1]宿迁南钢金鑫轧钢有限公司,宿迁江苏223800 [2]钢铁研究总院工程用钢所,北京100081

出　　处：《物理测试》2018年第5期8-14,共7页Physics Examination and Testing

摘　　要：采用模拟油船货油舱上甲板环境的腐蚀试验装置,研究了Sb元素对低合金钢在含CO2-SO2-O2-H2S气体的干湿交替环境中的耐蚀性的影响。结果表明,Sb元素可以有效降低钢在上甲板环境中的腐蚀减薄量。扫描电镜的观察结果显示,含Sb钢内锈层中的裂纹少于普碳钢;拉曼光谱的测试结果显示钢中加入Sb元素后,内锈层中的α-FeOOH含量增大;电子探针测试的结果显示,Sb在内锈层中与基体接触的区域内富集;X射线能谱分析结果显示,在内锈层中Sb元素以保护性较好的氧化物（Sb2O5）的形式存在。A simulated-corrosion test apparatus,which can simulate the upper deck condition in a cargo oil tank（COT）of tankers,was used to investigate the effect of Sb on the corrosion behavior of a low alloy steel on the condition of the dry-humid alternate environment containing CO_2-SO_2-O_2-H_2S gas. The results indicated that Sb reduced the corrosion loss of the test steels on the upper deck conditions. The SEM results showed that the inner rust layer of Sb-bearing low alloy steel contained fewer cracks than that of carbon steel. The Raman spectra results showed that the rust layer of Sbbearing steels had a higher content of α-FeOOH than that of carbon steel. The EPMA results indicated that the Sb enrichment region was the contact areas between the inner layer and the matrix. The XPS results showed that the Sb in the inner rust layer was in the form of the protective metal oxide（Sb_2O_5）.

关 键 词：货油舱 上甲板 低合金钢 Sb元素 耐蚀性 

分 类 号：TE988[石油与天然气工程—石油机械设备] TG178[金属学及工艺—金属表面处理]