在管道循环试验装置中对以下处理进行了评估:使用磷酸添加正磷酸盐；加入正磷酸锌；使用氢氧化钠将pH值调节至8.1；并使用氢氧化钠将pH值调节至8.7。根据以下标准对管道回路中测试的四种腐蚀控制处理进行评估:铅还原性能；在监管和功能限制范围内实施的可行性；运行一致性和持续腐蚀控制保护方面的可靠性；还有成本。

The following treatments were evaluated in a pipe loop testing apparatus: adding orthophosphate using phosphoric acid; adding zinc orthophosphate; adjusting pH to 8.1 using sodium hydroxide; and adjusting pH to 8.7 using sodium hydroxide. The four corrosion control treatments tested in the pipe loops were evaluated based on the following criteria: performance for lead reduction; feasibility of implementation within regulatory and functional constraints; reliability in terms of operational consistency and continuous corrosion control protection; and cost.