伊拉克某油田采用注水方法进行开采，高压注水系统生产3 a后，在注水阀组法兰处出现了严重的腐蚀和泄漏，并且部分运行压力低的阀组产生剧烈的噪声和震动。通过对注水阀组3处典型腐蚀进行分析，阐明了回注水的高氯离子，高矿化度，高含氧是腐蚀发生的主要原因。同时，腐蚀与系统运行状态，密封方式，金属材料都有关系。通过对腐蚀性介质，配管方式，工艺流程，流体力学，机械材料学以及腐蚀机理等方面的全面分析，讨论了腐蚀原因并提出了相应的防护措施。

An oilfield in Iraq is exploited with water flood. Severe leakage and corrosion happened for high pressure water injection manifolds after 3 years production. Serious noise and vibration arose for some of low pressure operation skids. Analyses of 3 typical corrosion points of the manifolds, indicated that high chloride, high TDS (total dissolved solids) and oxygen were the key reasons of corrosion. And the system operation condition, sealing method and material selection also played a role for the corrosion. Thus, a comprehensive analysis should be carried out for the corrosion and leakage problems. Through analyzing the corrosion fluid, piping, fluid mechanics, materials and corrosion mechanism, the corrosion reasons were discussed and some relative protection measures were suggested.