| 覃明,李言涛,徐玮辰,杨黎晖,侯保荣.储罐用钢在3.5%NaCl溶液中的腐蚀行为研究[J].装备环境工程,2018,15(10):84-88. QIN Ming,LI Yan-tao,XU Wei-chen,YANG Li-hui,HOU Bao-rong.Corrosion Behavioursof Storage Tank Steel in 3.5%NaCl Solution[J].Equipment Environmental Engineering,2018,15(10):84-88. |
| 储罐用钢在3.5%NaCl溶液中的腐蚀行为研究 |
| Corrosion Behavioursof Storage Tank Steel in 3.5%NaCl Solution |
| 投稿时间：2018-07-13 修订日期：2018-10-25 |
| DOI：10.7643/ issn.1672-9242.2018.10.014 |
| 中文关键词: 储罐 3.5%NaCl 腐蚀行为 水压试验 |
| 英文关键词:storage tank 3.5%NaCl corrosion behavior hydrostatic test |
| 基金项目:国家重点研发计划项目（2017YFB0903700） |
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| Author | Institution |
| QIN Ming | 1. Key Laboratory of Marine Environment Corrosion and Bio-fouling, Chinese Academy of Sciences, Qingdao 266071, China;2. University of Chinese Academy of Sciences, Beijing 266071, China;3. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China |
| LI Yan-tao | 1. Key Laboratory of Marine Environment Corrosion and Bio-fouling, Chinese Academy of Sciences, Qingdao 266071, China;3. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;4. Open Studio for Marine Corrosion and Protection, Qingdao National Laboratory for Marine Science andTechnology, Qingdao 266237, China |
| XU Wei-chen | 1. Key Laboratory of Marine Environment Corrosion and Bio-fouling, Chinese Academy of Sciences, Qingdao 266071, China;3. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;4. Open Studio for Marine Corrosion and Protection, Qingdao National Laboratory for Marine Science andTechnology, Qingdao 266237, China |
| YANG Li-hui | 1. Key Laboratory of Marine Environment Corrosion and Bio-fouling, Chinese Academy of Sciences, Qingdao 266071, China;3. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;4. Open Studio for Marine Corrosion and Protection, Qingdao National Laboratory for Marine Science andTechnology, Qingdao 266237, China |
| HOU Bao-rong | 1. Key Laboratory of Marine Environment Corrosion and Bio-fouling, Chinese Academy of Sciences, Qingdao 266071, China;3. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;4. Open Studio for Marine Corrosion and Protection, Qingdao National Laboratory for Marine Science andTechnology, Qingdao 266237, China |
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| 中文摘要: |
| 目的 对比研究三种油气储罐在水压试验时的腐蚀行为特征。方法 选用9Ni钢、Q235碳钢、304L不锈钢储罐用材料以及3.5%NaCl模拟海水溶液，采用开路电位、电化学阻抗谱、动电位极化曲线测试方法研究三种储罐用钢在模拟海水中的电化学腐蚀特征，同时结合浸泡质量损失试验和微观腐蚀形貌进行分析。结果 9Ni钢、Q235碳钢、304L不锈钢稳定后的开路电位（vs. SCE）分别为?0.55、?0.64、?0.10 mV，Rt值分别为2 792、1 765、125 100，平均腐蚀深度分别为0.070 6、0.160 3、0.002 5 mm/a。微观腐蚀形貌显示，9Ni钢和Q235碳钢表面发生明显的腐蚀，而304L不锈钢只发生轻微的点蚀。结论 在3.5%NaCl模拟海水溶液中，304L不锈钢最耐腐蚀，Q235碳钢最易腐蚀，9Ni钢居于两者之间。因此在9Ni钢和Q235碳钢储罐海水试压过程中需要采取临时保护。 |
| 英文摘要: |
| Objective To compare and study corrosion behaviors of three kinds of storage tanks during hydrostatic testing. Methods 9Ni steel, Q235 carbon steel, 304L stainless steel tank material and 3.5% NaCl simulated seawater solution were se-lected. The open circuit potential test, electrochemical impedance spectroscopy test and potentiodynamic polarization curve test method were used to study the electrochemical corrosion characteristics of three types of storage tanks in simulated seawater. Meanwhile, the microscopic corrosion morphology was analyzed in combinationwith soaking weight loss test. Results The open circuit potentials of the stabilized 9Ni steel, Q235 carbon steel, and 304L stainless steel were ?0.55 mVSCE, ?0.64 mVSCE, and ?0.10 mVSCE, respectively; the Rt values were 2 792 Ω?cm2, 1 765 Ω?cm2, and 125 100 Ω?cm2, respectively; and the average corrosion depths were 0.0706 mm/a, 0.1603 mm/a, 0.0025 mm/a, respectively. The micro-corrosion morphology showed signif-icant corrosion on the surface of 9Ni steel and Q235 carbon steel; while 304L stainless steel showed slight pitting corrosion. Conclusion In 3.5% NaCl simulated seawater solutions, 304L stainless steel is the most resistant to corrosion, Q235 carbon steel is the most susceptible to corrosion, and 9Ni steel is between the two. Temporary protection is required during seawater pressure testing of 9Ni steel and Q235 carbon steel tanks. |
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