| 钢质储罐罐底外壁阴极保护应注意的几个技术问题 |
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| 引用本文： | 胡士信.钢质储罐罐底外壁阴极保护应注意的几个技术问题[J].油气储运,1994,13(2):51-55. |
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| 作者姓名： | 胡士信 |
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| 作者单位： | 中国石油天然气管道勘察设计院 |
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| 摘 要： | 阴极保护可以有效地控制储罐罐底的电化学腐蚀，但和常规的管道阴极保护相比有几个技术问题值得探讨：①罐体接地，由于传统的接地电极材质与罐体材质不一致，两者形成了双金属腐蚀原池，加剧了罐体腐蚀，应将接地电极的材质改为锌或镁；②罐底电位分布的测试，对于新建储罐，在设计时就应考虑阴极保护系统，对于旧罐可用一支带孔的硬塑料管，对参比电极插入管中移动测量；③绝缘法兰的高电位防护，采用当前行之有效的三种措施，即锌
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| 关 键 词： | 油罐 阴极保护 腐蚀 |
Some Technical Points about Catbodic Protection of External Surface of Steel Oil Tank Bottom |
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| Hu Shixin..Some Technical Points about Catbodic Protection of External Surface of Steel Oil Tank Bottom[J].Oil & Gas Storage and Transportation,1994,13(2):51-55. |
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| Authors: | Hu Shixin |
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| Abstract: | Cathodic. protection can effectively control the electrolchemical corrosion to a tank bottom. Compared with conventional cathodic protection, there are several points worth of being discussed:1. Tank grounding. Conventionally, the materials of grounding electrodes and the tank body are different, the two kinds of metal make the original battery corroded thus aggrevating the tank corrosion. It is suggested that the grounding material be replaced by zinc or megneseoum;2. Measurement of potential distribution at the tank bottom. For new tanks, cathodic protection system should be taken into account during the design phase; And for existing tanks, a hard plastic tube with holes in the wall can be applied. The referential potential can be inserted into the tube for mobile measurement;3. High potential protection of insulated flanges. Three present efficient measures can be adopted: zinc grounding with battery for protection, diode protection and lightning arrester protection;4. Design parameters. 6-10A/m2 is suitable for current density protection considering the initial and later phases.Several suggestions are given in the paper in accordance with the situation that tank cathodic protection has not yet been put into the conpulsary practice, several suggestions are given for stable practice of the technique. |
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| Keywords: | oil tank cathodic protection grounding current flange current potential protection current |
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