Cathodic Protection for External Side of Bottom Plate of Storage Tank

doi:10.3969/j.issn.1006-396X.2017.01.017

›› 2017, Vol. 30 ›› Issue (1): 87-91.DOI: 10.3969/j.issn.1006-396X.2017.01.017

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Cathodic Protection for External Side of Bottom Plate of Storage Tank

Received:2016-09-06 Revised:2016-12-01 Published:2017-02-24 Online:2017-02-28

钢质原油储罐底板外壁的阴极保护

李佳润^1,2,李言涛¹,孙虎元¹,王传兴¹,钱洲亥³,侯保荣¹

1.中国科学院海洋研究所,山东青岛266071;2.中国科学院大学,北京100049;3.国网浙江省电力公司电力科学研究院,浙江杭州310006)

通讯作者: 李言涛(1968-),男,博士,研究员,从事海洋腐蚀检测的研究;E-mail:ytli@qdio.ac.cn。
作者简介:李佳润(1984-),男,博士研究生,工程师,从事海洋腐蚀与防护的研究;E-mail:lijiarun@yeah.net。
基金资助:
青岛市博士后资助项目(Y4KY14110N);国家电网公司科技项目“海上风电结构和设备防腐技术研究项目”(5211DS150016);中国科学院战略性先导科技专项(A类,XDA13040401)。

Abstract

Abstract:

The design, construction procedure and testing results analysis of impressed current cathodic protection for external side of bottom plate of 100 000 m³storage tank are presented in this work. A technical scheme is proposed in the case of reasonable parameters selection and compared with recommended national standard. Potential testing with and without impressed current removed is carried out, finding that the results are both in the range of effective protection. After 1 year running, the increasing output current and decreasing loop resistance are ascribed to the synergistic effect of damaged coating and increased corrosion capability of electrolyte.

Key words: Cathodic protection, Storage tank, Impressed current, Corrosion, MMO anode

摘要： 以单台100 000m³ 原油储罐为对象,从设计过程、施工流程、测试结果分析等多方面系统介绍了原油储罐外壁强制电流近阳极地床阴极保护工程。在合理选择参数的情况下,通过计算提出阴极保护技术方案,并与国标推荐做法进行了对比。投入运行后,对阴极保护系统进行了通电和瞬断电位测试,发现罐底板电位均处于保护范
围内,说明阴极保护系统有效运行。运行1年后,阴极保护系统存在输出电流增大,回路电阻减小的情况,这是由涂层破损,介质腐蚀性提高协同作用引起的。

关键词: 阴极保护, 原油储罐, 强制电流, 腐蚀, 混合金属氧化物阳极

LiJiarun,LiYantao,SunHuyuan,WangChuanxing. Cathodic Protection for External Side of Bottom Plate of Storage Tank[J]. , 2017, 30(1): 87-91.

李佳润,李言涛,孙虎元,王传兴,钱洲亥,侯保荣. 钢质原油储罐底板外壁的阴极保护[J]. 石油化工高等学校学报, 2017, 30(1): 87-91.

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Cathodic Protection for External Side of Bottom Plate of Storage Tank

钢质原油储罐底板外壁的阴极保护

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