Analysis of the Physicochemical Characteristics of Corrosion Scales in the Iron Pipes of a Typical Water Distribution System

摘要：

　　Corrosion scales in iron pipes can reduce water quality in a water distribution system,and the extent of the impact is closely related to the physicochemical characteristics of the scales.We investigated the microstructure and used scanning electron microscope (SEM),energy dispersive analysis of X-rays (EDAX),X-ray diffraction (XRD) to analyze both the elemental and chemical compositions of the scales in the iron pipes that are widely used throughout China,s water distribution system.We have found that iron pipe scales exhibit similar internal hierarchical morphologies (surface layer,hard rind layer and kernel layer),primarily composed of a variety of iron oxidation products such as Fe304,a-FeOOH and 7-FeOOH.Based on our experimental results,we discuss the structural features and formation mechanism of the pipe scales,and provide measures that can prevent and control the release of iron and scale formation to improve the safety of water supplied by a water distribution system.

关键词： Water Distribution System Iron Pipe Scale Corrosion Iron Release

作者: Zheng Lei Zhang Yi Ding Aizhong Bian Zhaoyong Xu Xinyi Yao Jianwen

作者单位: College of Water Sciences, Beijing Normal University, Beijing 100875, PR China Bureau of South to North Water Transfer of Planning, Designing and Management, Ministry of Water Res

会议类型: 国际会议

会议名称: 2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)

会议地点: 青岛

会议语种:英文

页码: 158-163

在线出版日期: 2013-06-25（万方平台首次上网日期，不代表论文的发表时间）