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首页> 外文期刊>Corrosion science >Characteristics of iron corrosion scales established under blending of ground, surface, and saline waters and their impacts on iron release in the pipe distribution system
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Characteristics of iron corrosion scales established under blending of ground, surface, and saline waters and their impacts on iron release in the pipe distribution system

机译：在地下水，地表水和盐水混合下建立的铁腐蚀垢的特征及其对配管系统中铁释放的影响

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摘要

Interior scales on PVC, lined ductile iron (LDI), unlined cast iron (UCI) and galvanized steel (G) were analyzed by XRD, RMS, and XPS after contact with varying water quality for 1 year. FeCO_3, α-FeOOH, β-FeOOH, γ-Fe_2O_3, Fe_3O_4 were identified as primary UCI corrosion products. No FeCO_3 was found on G. The order of Fe release was UCI > G ≥ LDI > PVC. For UCI, Fe release decreased as % Fe_3O_4 increased and as % Fe_2O_3 decreased in scale. Soluble Fe and FeCO_3 transformation indicated FeCO_3 solid was controlling Fe release. FeCO_3 model and pilot data showed Fe increased as alkalinity and pH decreased.
机译：接触变化的水质1年后，通过XRD，RMS和XPS分析PVC，衬里球墨铸铁（LDI），衬里铸铁（UCI）和镀锌钢（G）上的内部水垢。确定了FeCO_3，α-FeO​​OH，β-FeOOH，γ-Fe_2O_3，Fe_3O_4是主要的UCI腐蚀产物。在G上未发现FeCO_3。Fe的释放顺序为UCI> G≥LDI> PVC。对于UCI，随着％Fe_3O_4的增加和％Fe_2O_3的结垢减少，Fe释放减少。 Fe和FeCO_3的可溶转化表明FeCO_3固体在控制Fe的释放。 FeCO_3模型和试验数据表明，Fe随着碱度和pH值的降低而增加。

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