集输管线腐蚀原因分析

Analysis of Corrosion of Oil Pipelines

摘要: 研究了青海油田集输管线腐蚀的主要原因。结果表明:水样中高氯离子含量、高总含盐量、高矿化度是影响管线腐蚀加剧的重要原因。细菌微生物参与了管线的腐蚀反应,它与溶液中氯离子共同作用,使管线局部腐蚀加剧。同时管线还受到由硫化氢引起的应力腐蚀作用,使得管线既可能由于坑蚀或孔蚀导致腐蚀穿孔,还可能由于应力腐蚀而导致突发性开裂。

Abstract: The main reason for corrosion of oil pipelines in Qinghai oil field has been studied. High concentration of Cl^-,salts, high mineral degree are main factors to influence the corrosion of pipelines. Bacteria also assist corrosion. Localized corrosion induced by Cl^- and bacteria was accelerated.Simultaneously the pipelines also suffer from SCC induced by H2S. The pipeline steel could possibly leak by pitting or abrupt fracture by stress corrosion.