在实验室内采用旋转挂片失重法分别研究了常规工艺和膜工艺处理的再生水对A3碳钢与球墨铸铁的腐蚀行为，分析了五种水质参数对腐蚀性的影响。试验结果表明，膜处理工艺生产的再生水对这两种材料的腐蚀性高于常规处理工艺处理的再生水；A3碳钢在再生水中的耐腐蚀性强于球墨铸铁；SO42-对两种材料均表现出促进腐蚀作用，且在浓度为60～120 mg/L时腐蚀产物形态发生变化；Cl－对A3碳钢与球墨铸铁同样具有腐蚀促进作用，在浓度为90～120 mg/L时，出现由面腐蚀向点腐蚀变化的趋势；A3碳钢与球墨铸铁在两种再生水中的腐蚀速率随碱度增加而降低，硬度在30～120 mg/L时，再生水对球墨铸铁的腐蚀具有抑制作用。采用LSI和LR指数判断水质对A3碳钢与球墨铸铁的腐蚀性时，需要考虑其适用的水质类型。

The laboratory rotary coupon test was used to investigate the corrosion behavior of reclaimed water treated by the conventional process and membrane process on A3 carbon steel and ductile cast iron, and the impacts of five types of water quality parameters on the two materials were analyzed. Experiment results showed that (1) the corrosion on the two materials of reclaimed water treated by membrane process is higher than that treated by conventional process; (2) A3 steel has higher corrosion resistance than ductile cast iron in the reclaimed water; (3) SO42- can facilitate corrosion in the two materials, and corrosion morphology can change when the concentration is 60 ~ 120 mg/L; (4) Cl - has the same corrosion effects on A3 carbon steel and ductile cast iron as SO42- .When the concentration of Cl - reach to 90 ~ 120 mg/L, the corrosion trend varies from surface corrosion to point corrosion; and (5) the corrosion rate of A3 carbon steel and ductile cast iron in the two types of reclaimed water decreases with the increasing of alkalinity. When the hardness of 30 ~ 120 mg/L, reclaimed water has inhibitory effects on corrosion to the ductile cast iron. The type of water quality needs to be considered when the LSI and LR indexes are applied to evaluate the corrosion effects of water quality on A3 steel and ductile cast iron.