热残余应力对3PE防腐蚀层剥离的影响
Influence of Thermal Residual Stress on Disbondment of 3PE
摘 要
通常认为3PE防腐蚀层的剥离受到包括涂覆阶段热(温度)、涂覆质量、力破坏、光氧老化以及埋地复杂环境的腐蚀等各个方面的影响, 其中防腐蚀层预制涂覆以及运行阶段特殊管段温度变化大的热影响不可忽视。本工作关注热效应影响, 通过建立管道-防腐蚀层热传递应力-应变模型, 借助Ansys有限元分析软件研究管道在防腐蚀层预制过程中产生的热残余应力, 讨论温差导致的热残余应力对3PE防腐蚀层不同粘结面剥离的影响。
热残余应力
剥离
有限元分析
3PE coating
heat residual stress
disbondment
finite element analysis
Abstract
It is usually believed that the peeling of coating has be strongly affected by the heat generated during coating stage, bad coating quality, unexpected external force, light and oxygen-aging, corrosion in complicated underground environment and other aspects. Among these, the effect of temperature changes during the coating phase of some special pipes, can not be neglected. The present work focuses on the thermal effects. A stress-strain model of pipe-coating’s heat during transfer process was established. With the help of finite element analysis software (ANSYS), the thermal residual stress generated in coating process was analyzed, and the hazard influence of heat residual stress on 3PE coating’s bonding interface was discussed to make it possible to analyze the mechanism of the 3PE coating’s dibondment.
中图分类号 TG174.4
所属栏目 试验研究
基金项目 “十二五”国家科技支撑计划01课题(2011BAK06B01)
收稿日期 2012/6/26
修改稿日期
网络出版日期
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备注王新华, 教授, 博士,
引用该论文: WANG Xin-hua,HUANG Hai,HE Ren-yang,YANG Guo-yong,WANG Li-mei. Influence of Thermal Residual Stress on Disbondment of 3PE[J]. Corrosion & Protection, 2013, 34(5): 376
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参考文献
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【2】Kamimura T, Kishikawa H.Mechanism of Cathodic Disbonding of Three-Layer Polyethlene-Coated Steel Pipe[C]//Corrosion 1998.Houston:[s.n.],1998:979-988.
【3】张其滨,张莉,李爱贵,等.基材变形对3PE防腐蚀层性能的影响[J].石油工程建设,2009,6(3):33-35.
【4】张其滨,刘金霞,赫连剑锋,等.管道3PE涂层的阴极剥离性能研究[J].腐蚀与防护,2006,27(4):331-333.
【5】Kazimierz Darowicki, Micha Szocinski. Evaluating the performance of organic coatings under mechanical stress using electrochemical impedance spectroscopy[J]. J Solid State Eletrochem,2004,8(2):346-351.
【6】胡士信,廖玉平,王冰怀.管道防腐蚀层设计手册[M].北京:化学工业出版社,2007.
【7】朱光俊.传输原理[M].北京:冶金工业出版社,2009.
【8】GB/T 23257-2009埋地钢质管道聚乙烯防腐蚀层[S].
【9】张朝晖.ANSYS12.0热分析工程应用[M].北京:中国铁道出版社,2010.
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