Dynamic Pitting Analysis in Liquid and Wet-Gas Petroleum Pipelines
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..
Localized pitting corrosion Dynamic pitting factor Liquid and wet-gas petroleum pipelines Fe2+ ion accumulation, Diffusion barriers Pit geometry
Zhenjin Zhu Patrick J.Teevens Tesfaalem Haile Nima Tajallipour
Broadsword Corrosion Engineering,Ltd.Calgary,Alberta,Canada
国内会议
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
廊坊
英文
388-396
2013-09-01（万方平台首次上网日期，不代表论文的发表时间）