本文讨论了坦帕湾水务公司开展的一项腐蚀和再平衡研究，以评估其成员国政府配电系统中的铁释放和铜腐蚀程度。腐蚀和再平衡研究的主要目标是评估与配水系统和客户家中的管道水相互作用相关的混合水质量问题的可能性。坦帕湾水资源区的一些地下水源具有高浓度的碱度和硬度，以及氯化物、硫酸盐和其他无机成分。同样，一些基准水源的有机物含量在浓度和性质上都是可变的。未来，部分历史地下水将与反渗透装置处理的脱盐海水和臭氧/颗粒活性炭装置处理的地表水混合。 本研究评估了各种拟议混合方案的潜在影响，并确定了哪些水化学变化可能是适当和必要的。就材料而言，关于再平衡和腐蚀效应，有两个截然不同的问题。首先，从旧的、小直径的镀锌铁制供水管线和家庭管道中释放的铁有可能导致配水的美学质量（有色水）显著下降，尽管这并不安全。第二，改变配水水质可能会影响铜和含铅表面，并改变成员国政府相对于铅和铜规则的合规状态。每种材料的表面特征和化学性质都是独一无二的。因此，使用单独的测试方案来评估各自对铁的影响- 根据管道对铅和铜表面的影响，包括表格和图表。

This paper discusses a corrosion and re-equilibration study developed by Tampa Bay Water to evaluate the extent of iron release and copper corrosion in their member governments' distribution systems. The primary goal of the corrosion and re-equilibration study was to assess the potential for blended water quality issues relative to pipe-water interactions in the distribution system and in the customers' homes. Some of the Tampa Bay Water member utility groundwater sources are heavily mineralized with high concentrations of alkalinity and hardness, as well as chloride, sulfate, and other inorganic constituents. Similarly, the organic content of some baseline water sources is variable in both concentration and character. In the future, some of the historic groundwater will be blended with desalinated seawater treated at a reverse osmosis plant and surface water treated at an ozone/granulated activated carbon plant. This study assesses the potential impacts of various proposed blending scenarios and determined what water chemistry changes may be appropriate and necessary. In terms of materials, there are two distinct concerns relative to re-equilibration and corrosion effects. The first is that iron release from old, small-diameter, galvanized iron service lines and household plumbing has the potential to cause significant degradation in the aesthetic quality (colored water), although not the safety, of the distributed water. The second is that modification of the quality of the distributed water may impact copper and lead-bearing surfaces and change member governments' compliance status relative to the Lead and Copper Rule. Both the surface character and the chemistry of each of the materials at issue are unique and different. Therefore, separate testing protocols were used to evaluate the respective impacts on iron-based pipes versus the impacts to lead and copper surfaces Includes tables, figures.