长距离埋地油气管道冲蚀腐蚀问题研究

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中图分类号： TQ050.9+6 文献标志码：A 文章编号：1001-5922（2025）10-0148-04

Research on erosion corrosion of long-distance buried oil and gas pipelines

FENG Jiaxin （East China Design Institute，Pipe China Engineering Technology Innovation Co.，Ltd.，Xuzhou 221008， Jiangsu China）

Abstract：Aiming at the erosion corosion problem oflong-distance oil and gas pipelines，thecorrosion problem of long-distance oil and gas pipelines is analyzed by taking theburied pipelines with serious corrosion in anoilfield company as the research object.The research results show thatthe cathodic protection potential and the temperatureof crudeoilare the mainfactors affecting thecorrosionefficiencyofburied pipelines，andtoohightemperature and too negative applied potential can accelerate the corrosion ofoil and gas pipelines.For pipelines with damaged coating，cathodic protection current shielding is the main factor causing corrosion of buried pipelines.Thecorrosionlawis thatthe greaterthe distance fromthedamaged position，the greaterthecathodic protection shielding effect；the higherthe temperature，the smaller the shielding efect.Cathodic protection is applied to the damaged partof the anticorrosive coating，and the distal end cannot reach the protection potential.The environmental conditionsonthe metal surface are more stringent andthecorrosionrate is higher.Finall，the anticorrosion efficiencyof buried pipelines canbeeffctively improved bydirectly installing sacrificialanodes inside theinsulationlayerand combining anticorrosion with solid corrosion inhibitors.

Key words：corosion of oiland gas pipelines;cathodic protection;cathodic shielding；damage to the anti-corrosion layer；shielding effect

长距离油气管道长期在复杂的环境中服役，内有高速流动的油气介质，外有土壤、地下水等环境因素的影响，很容易发生冲蚀腐蚀。（剩余4739字）