| 引用本文: | 周勇,周攀虎,董会,赵密锋,孙良,刘彦明.油气田污水储罐腐蚀性能模拟设计及试验研究[J].材料科学与工艺,2020,28(5):62-67.DOI:10.11951/j.issn.1005-0299.2020164. |
| ZHOU Yong,ZHOU Panhu,DONG Hui,ZHAO Mifeng,SUN Liang,LIU Yanming.Corrosion resistance simulation design and experimental study of sewage storage tanks in oil and gas fields[J].Materials Science and Technology,2020,28(5):62-67.DOI:10.11951/j.issn.1005-0299.2020164. |
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| 摘要: |
| 为研究油气田污水对储罐腐蚀行为的影响,对储罐中污水进行腐蚀性能预测。模拟研究了温度、流速、压力以及pH值对储罐腐蚀性能的影响规律。并通过常温常压浸泡试验进行验证,介质包含水样和泥样两种腐蚀环境。模拟结果表明,两种环境中腐蚀性离子与结垢性离子含量较高,易发生CaCO3结垢可能；随着温度的升高,储罐的pH值呈下降趋势,腐蚀速率与腐蚀电位呈上升趋势,其中泥样温度高于40 ℃时,腐蚀电位降低；储罐腐蚀速率随水流速度和压力的增加而加快；试验结果表明,储罐在两种环境中的实际腐蚀速率与模拟值趋于一致；碳钢表面产生CaCO3结垢,与水质结垢预测分析一致。储罐在泥样环境中的pH、腐蚀速率与腐蚀电位均大于水样环境,在泥样环境储罐更易发生腐蚀。 |
| 关键词: 污水储罐 水质分析 腐蚀性能 腐蚀速率 结垢 |
| DOI：10.11951/j.issn.1005-0299.2020164 |
| 分类号:TG174.44 |
| 文献标识码:A |
| 基金项目:西安石油大学(材料科学与工程)省级优势学科项目(YS37020203). |
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| Corrosion resistance simulation design and experimental study of sewage storage tanks in oil and gas fields |
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ZHOU Yong1, ZHOU Panhu1, DONG Hui1, ZHAO Mifeng2, SUN Liang1, LIU Yanming1
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(1.School of Material Science and Engineering, Xi′an Shiyou University, Xi′an 710065,China; 2.PetroChina Tarim Oilfield Company, Korla 841000, China)
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| Abstract: |
| To study the influence of oil and gas fields sewage on the corrosion behavior of storage tanks, the corrosion performance of the sewage in the storage tanks was analyzed.The effects of temperature, flow rate, pressure and pH on the corrosion performance of the storage tank were simulated. And verified by the normal temperature and pressure immersion experiment. The medium contains two corrosive environments, water and mud. The simulation results show that the content of corrosive ions and scale-forming ions in the two environments was high, and CaCO3 scaling was likely to occur; as the temperature increases, the pH value of the storage tank shows a downward trend, and the corrosion rate and corrosion potential increase The trend was that when the temperature of the mud was higher than 40 ℃, the corrosion potential decreases; the corrosion rate of the storage tank accelerates with the increase of water flow rate and pressure; the actual corrosion rate and simulated value of the storage tank in two environments in the normal temperature and pressure immersion experiment tends to be consistent; CaCO3 scaling occurs on the surface of carbon steel, which is consistent with the prediction analysis of water quality scaling. The pH, corrosion rate and corrosion potential of the storage tank in the mud-like environment are larger than those in the water-like environment, and the storage tank is more prone to corrosion in the mud-like environment. |
| Key words: sewage storage tank, water quality analysis, corrosion resistance simulation,corrosion rate ,scaling |
