小口径管道腐蚀及防护策略研究进展

doi:10.11896/cldb.19060044

材料导报

2020, Vol. 34

Issue (19): 19166-19172 https://doi.org/10.11896/cldb.19060044

金属与金属基复合材料

小口径管道腐蚀及防护策略研究进展

王思权¹, 陈世波^2,3, 李焰¹, 齐建涛⁴

1 中国石油大学(华东)材料科学与工程学院,青岛 266580
2 潍坊东方钢管有限责任公司,潍坊 261000
3 广西大学化学与化工学院,南宁 530004
4 中国石油大学(华东)新能源学院,青岛 266580

Advances in Corrosion and Prevention of a Small-bore Piping

WANG Siquan¹, CHEN Shibo^2,3, LI Yan¹, QI Jiantao⁴

1 School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
2 Weifang Orient Steel Pipe Co. Ltd, Weifang 261000, China
3 College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
4 College of New Energy, China University of Petroleum (East China), Qingdao 266580, China

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摘要随着我国工业水平的不断发展与提高,工业生产中对石油资源的需求越来越迫切,而石油资源分布的地域性差异给资源的输送带来了巨大的挑战。集输管道能够大幅缓解油气资源输送的困难,被广泛应用于石油石化行业。然而,集输管道长期在土壤、水或空气中服役,并且具有口径小、数量多和内壁防腐困难等突出特点,因此,小口径集输管道的腐蚀问题的研究具有重要的科学和工程应用价值。
在小口径管道外壁防腐方面,通常采用传统的石油沥青类(如石油沥青、煤沥青)防腐涂层,虽然该涂层成本低廉,但是存在机械强度低、韧性受温度影响大、易吸水且不能抵抗细菌腐蚀等局限性。鉴于此,加入其他树脂来改善涂层性能的方法引起了科学界的持续关注。在内防腐方面,由于小口径管道施工难度大,存在焊接热影响区以及现场内补口技术相对落后,导致传统涂层防腐技术的应用受到了限制。传统的内壁防腐主要采用添加缓蚀剂的方式,但由于其成本过高并未得到普遍应用。在此基础上,国内外相继开发出一些新型内防腐技术,为小口径管道的内防腐提供了新思路。
本文首先介绍了影响小口径管道外壁腐蚀的各个环境因素(大气腐蚀、土壤腐蚀和海水腐蚀等),然后讨论了三层结构的聚乙烯和熔结环氧粉末等外壁防腐技术。需要注意的是,小口径管道由于管径小,传统的内壁防腐层涂覆存在困难,因而其内壁腐蚀成为工程应用的安全隐患。鉴于此,本文详尽分析了小口径管道内壁的主要腐蚀破坏形式、腐蚀影响因素(含氧量、pH值和含盐量等因素),并讨论了常用内壁防腐技术。最后,本文展望了小口径管道防腐措施的未来发展趋势。

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	王思权
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关键词: 管道小口径外腐蚀内腐蚀防腐措施

Abstract: In China, the demand for petroleum resources is increasing since the rapid development of the industry. While the regional differences in oil and gas resources distribution have brought enormous challenges to the transportation of resources. Oil-gas gathering and transferring pipelines are widely used in the petroleum and petrochemical industry, because they are helpful to transport oil and gas resources effectively. However, oil-gas gathering and transferring pipelines are exposed to soil, water or atmosphere environment, and they also have some prominent characteristics, such as small caliber, large number, short distance and having difficulty in inner wall corrosion protection. As a result, it is of scientific and engineering value to study corrosion matters on small-bore oil and gas gathering pipelines.
In the outer wall anticorrosion of small-bore pipes, the traditional petroleum asphalt anti-corrosion coatings, such as petroleum asphalt and coal asphalt, are adopted widely because of low cost. Despite the fact, the mechanical strength and temperature toughness of these coatings are inferior. Thus, they are susceptible to bacterial corrosion. Given this circumstance, adding other resins to improve coating performance has caused continuous concern in the scientific community; when it comes to internal corrosion protection, the general anticorrosion techniques are limited due to the high complexity construction of small-diameter pipelines, the existence of welding heat-affected zones and the lag of fill-in technology. The way to add corrosion inhibitors is not universally employed because of the high cost. In order to solve these problems, some new internal anti-corrosion technologies have been developed at home and abroad.
In this paper, the environmental factors of the small-diameter pipelines' outer wall, including atmospheric corrosion, soil corrosion, and sea-water corrosion, are introduced firstly, and then the anti-corrosion technologies of three-layer polyethylene (3PE) and melted epoxy powder are discussed. Notably, the traditional coating of inner wall anticorrosive has difficulty in spraying each location on account of the narrow diameter of small-diameter pipelines, so the inner wall corrosion of small-diameter pipelines has become a potential hazard in engineering applications. Considering this situation, we analyze the main corrosion factors of the inner wall of the pipeline, and how these factors affect the inner wall corrosion. In addition, we discuss the commonly used anti-corrosion technologies of the inner wall, and we also forecast the future development trend of anti-corrosion measures for small-caliber pipelines.

Key words: pipeline small-bore outer wall anticorrosion internal corrosion anticorrosion

发布日期: 2020-11-05

ZTFLH:

TG171

通讯作者: alexander_qi87@sina.com

作者简介: 王思权,2017年6月毕业于青岛理工大学,获得工学学士学位。现为中国石油大学(华东)材料科学与工程学院硕士研究生,在李焰教授和齐建涛副教授的指导下进行研究。目前主要研究领域为硫回收装置硫化氢的在线监测。
李焰,中国石油大学(华东)材料科学与工程学院教授,博士研究生导师。青岛首批百强引进人才、青岛杰出科学家和技术学家。中国腐蚀与保护学会油气田与管道腐蚀与保护专业委员会副主席,山东省特种设备协会水处理和有机热载体专业委员会副主任,山东和青岛腐蚀与防护学会副秘书长。成功主持2016年全国腐蚀电化学及测试方法学术交流会。长期从事金属的腐蚀与防护研究,并取得了大量系统性、创新性的研究成果,在电偶腐蚀、微电极阵列研究与表征方面已累计发表被SCI、EI收录的40余篇论文,SCI他引1 000余次。
齐建涛,中国石油大学(华东)化学工程学院副教授,硕士研究生导师。山东省暨青岛市腐蚀与防护学会理事。2011年6月本科毕业于中国石油大学(华东)化学工程学院,2015年9月在英国曼彻斯特大学腐蚀与防护专业取得博士学位,2015—2018年分别在英国曼彻斯特大学(LATEST2项目,合作导师Prof. George Thompson院士)和法国国家科学研究中心(NEPAL FUI项目,合作导师Prof. Philippe Marcus)进行博士后研究工作。主要从事金属材料的表面改性、纳米材料光谱分析及耐蚀性能评估等方面的研究工作。近年来,在腐蚀与防护研究领域发表论文10余篇,包括Mater. Let.、Electrochem. Commun.、Electrochim. Acta、J. Electrochem. Soc.、Appl. Surf. Sci.、Thin Solid Films.和Surf. Coat. Technol等被SCI收录的学术期刊。

引用本文:

王思权, 陈世波, 李焰, 齐建涛. 小口径管道腐蚀及防护策略研究进展[J]. 材料导报, 2020, 34(19): 19166-19172.
WANG Siquan, CHEN Shibo, LI Yan, QI Jiantao. Advances in Corrosion and Prevention of a Small-bore Piping. Materials Reports, 2020, 34(19): 19166-19172.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.19060044 或 http://www.mater-rep.com/CN/Y2020/V34/I19/19166

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