[Analysis of the characteristics of corrosion scale in drinking water distribution systems].
Scanning electron microscopy, X-ray fluorescence spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy were used to analyze the microstructure, chemical composition, crystalline structure and compound constitute of the corrosion scale from cast iron pipe and galvanized steel pipe in drinking water distribution systems. The outer of the corrosion scale was compact, while the inner was porous. Iron was the primary chemical element of the corrosion scale, and the composition of the scale was iron compounds. The outer scale were ferric compounds such as alpha-FeOOH, gamma-FeOOH, alpha-Fe2O3, gamma-Fe2O3, FeCl3, while the inner were ferrous compounds such as Fe3O4, FeCl2, FeCO3. The characteristics of the corrosion scale was lying on hydraulic conditions and water quality in distribution systems, and the characteristics of iron pipe materials.
Niu
Zhang-bin
ZB
Department of Environment Science and Technology, Tsinghua University, Beijing, China.
Wang
Yang
Y
Zhang
Xiao-jian
XJ
He
Wen-jie
WJ
Han
Hong-da
HD
Yin
Pei-jun
PJ
D003343:Corrosion; D005290:Ferric Compounds / Q000032:analysis / Q000737:chemistry; D005296:Ferrous Compounds / Q000032:analysis / Q000737:chemistry; D007501:Iron / Q000032:analysis* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D013052:Spectrometry, X-Ray Emission; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014881:Water Supply / Q000032:analysis*; D014961:X-Ray Diffraction
D005290:Ferric Compounds; D005296:Ferrous Compounds; D014874:Water Pollutants, Chemical; D007501:Iron