Dynamic Pitting Analysis in Liquid and Wet-Gas Petroleum Pipelines

详细信息    查看全文 | 下载全文 | 推荐本文 |

• 作者：Zhenjin ZhuPatrick J.TeevensTesfaalem HaileNima Tajallipour
• 会议时间：2013-09-01
• 关键词：Localized pitting corrosion ; Dynamic pitting factor ; Liquid and wet-gas petroleum pipelines ; Fe2+ ion accumulation ; Diffusion barriers ; Pit geometry
• 作者单位：Broadsword Corrosion Engineering,Ltd.Calgary,Alberta,Canada
• 母体文献：2013中国国际管道会议暨第一届中国管道与储罐腐蚀与防护学术交流会论文集
• 会议名称：2013中国国际管道会议暨第一届中国管道与储罐腐蚀与防护学术交流会
• 会议地点：廊坊
• 主办单位：中国腐蚀与防护学会
• 语种：chi

摘要

Localized pitting attack remains the greatest concern on pipeline integrity in petroleum industry.Cumulative metal losses of pipelines are time-dependent, varying widely from pipeline to pipeline and region to region.The remaining wall thickness along the entire pipeline cannot be quantified simply through the general corrosion rates only.To identify the most probable locations for potential pipeline failures, the dynamic pitting concept must be implemented.Specifically, when a pitting factor was selected to characterize the metal degradation, the pitting factor must be time-and location-dependent, rather than employing a fixed value.In this paper, a theoretical derivation of dynamic pitting corrosion was firstly conducted.Following this, fundamental mechanism of pitting propagation from metastable to stable growth was elucidated.Subsequently, qualitative description of a pitting factor was introduced.Furthermore, case studies of dynamic pitting corrosion in liquid and wet-gas petroleum pipelines were analyzed.The efforts of this paper were made to generate a framework of developing dynamic pitting factors, which empowers the pipeline owners to enhance the integrity of their assets through performing a reliable assessment of cumulative wall loss for liquid and wet-gas petroleum pipelines..