Recent challenges and research progress in microbiologically influenced corrosion in drinking water distribution systems

Pervasive microorganisms inhabit various ecosystems, and their interactions can induce significant corrosion in drinking water distribution systems (DWDSs). The study of microbiologically influenced corrosion (MIC) mechanisms and preventive methods is becoming increasingly important. Water deterioration frequently occurs because of pipe corrosion and the destabilization of corrosion scales. The complexity of the corrosion processes has not yet allowed a general mechanism to be established, and the compositions of microbial communities in DWDSs are not fully understood. This paper provides a comprehensive review of microbial pipe corrosion in DWDSs, explains the current mechanisms and research progress of pipeline corrosion, discusses the influence of microorganisms on corrosion products, and discusses factors such as pipe materials, flow conditions, and residual disinfectants that influence microbial growth. It analyses accident cases associated with the MIC mechanisms, compiles a comprehensive overview of current methods for suppressing MIC, and explores potential corrosion inhibition strategies. It was proposed that preventive methods such as microbial community engineering, replacement of pipeline materials with enhanced corrosion resistance, or development of corrosion-resistant coatings could be employed for MIC prevention. Additionally, it proposes future research directions concerning MIC mechanisms and preventive methods.