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Study on the electrochemical corrosion and scale growth of ductile iron in water distribution system. PART II

机译:配水系统中球墨铸铁的电化学腐蚀和结垢研究。第二部分

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Long-term contact with carried water makes water supply pipes prone to electrochemical corrosion,which will lead to pipelines leaking or bursting. In this study, a flow corrosion simulation andmonitoring system (FCSMS) was designed to systematically study the factors influencing internalcorrosion of ductile iron pipes. By using the linear polarization resistance (LPR) method, EIS and thepolarization curve test, it was determined how five influencing factors (including temperature and pH)affect the corrosion rate, corrosion scale structure and anodic and cathodic reactions. Then, the effectmechanism of each influencing factor in the internal corrosion process was expounded, and theimportance of the influencing factors was determined by correlation analysis: temperature> pH>dissolved oxygen> total hardness> total residual chlorine.
机译:长期与载水接触会使供水管易于发生电化学腐蚀,这将导致管道泄漏或爆裂。在这项研究中,设计了一种流动腐蚀模拟和监测系统(FCSMS),以系统地研究影响球墨铸铁管内部腐蚀的因素。通过线性极化电阻(LPR)方法,EIS和极化曲线测试,确定了五个影响因素(包括温度和pH)如何影响腐蚀速率,腐蚀垢结构以及阳极和阴极反应。然后,阐述了各种影响因素在内部腐蚀过程中的作用机理,并通过相关分析确定了影响因素的重要性:温度> pH>溶解氧>总硬度>总残留氯。

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