Microbial corrosion and heavy metal accumulation in metal water supply pipelines aggravate scale formation and may result in pipeline leakage or bursting events. To better understand the corrosion and corrosion products in the damaged pipes, deposits excavated from three damaged pipes after 22–26 year service periods were analyzed. Using a combination of advanced micro-mineral techniques and 16 S rRNA high-throughput sequencing, the micromorphology, chemical composition, and bacterial community were investigated systematically. Unlined pipe wall scales ruptured while lined pipes leaked due to joint scales. Dendrogram correlation results demonstrated that V/As, Al/Pb, and Cr/Mn clusters exhibited co-adsorption and co-precipitation characteristics. FTIR and XRD analysis detected the presence of γ-FeOOH, α-FeOOH in loose scales, and Fe₃O₄ in rigid scales. Scales were colonized by various corrosion bacteria, with sulfate reducing bacteria and ammonia producing bacteria being dominant in the scales of anticorrosive and non-corrosive pipe, respectively. Tl, Ca, Al, and Pb exhibited an extremely positive correlation with Rhodocyclaceae, Ferritrophicum, Thermodesulfovibrionia, and Clostridiaceae. Al and V presented a potential Hazard Quotient risk to consumers, while Cd was potentially bioavailable in all inner scales. Overall, this study provides valuable information for the effective management and avoidance of corrosion-induced pipeline damage and heavy metal release.

金属供水管道中的微生物腐蚀和重金属积累加剧了水垢的形成，并可能导致管道泄漏或爆裂事件。为了更好地了解受损管道中的腐蚀和腐蚀产物，分析了在 22-26 年使用期后从三根受损管道中挖掘出的沉积物。结合使用先进的微量矿物技术和 16 系统地研究了 S rRNA 高通量测序、微形态学、化学成分和细菌群落。无衬里的管壁鳞片破裂，而衬里的管道由于接头结垢而泄漏。树状图相关结果表明，V/As、Al/Pb 和 Cr/Mn 簇表现出共吸附和共沉淀特征。FTIR 和 XRD 分析检测到 γ-FeOOH、α-FeO​​OH 在松散鳞片中和 Fe ₃ O ₄在刚性鳞片中的存在。各种腐蚀细菌在水垢上定殖，其中硫酸盐还原菌和产氨菌分别以防腐和非腐蚀管道的水垢为主。Tl、Ca、Al、Pb与Rhodocyclaceae呈极正相关，Ferritrophicum、Thermodesulfovibrionia和Clostridiaceae。Al 和 V 对消费者具有潜在的危害商风险，而 Cd 在所有内部尺度中都具有潜在的生物可利用性。总体而言，这项研究为有效管理和避免腐蚀引起的管道损坏和重金属释放提供了有价值的信息。