Recent Advances in Sensing and Assessment of Corrosion in Sewage Pipelines

Abstract Corrosion is known as gradual destruction of materials, which leads to loss of structural integrity and deteriorates the surface function. In terms of sewage pipelines, corrosion is vital due to its substantial financial, health, and safety cost for society, and it is considered as one of the biggest problems facing water and wastewater infrastructure. Also, it is the primary cause of chemical properties alteration, efficiency loss, life span reduction, etc. To overcome the resulting problems, various researches have been performed to understand not only the effective parameters leading to corrosion in sewer pipes but also monitoring the condition of the infrastructure. Studies have depicted that development of advanced sensing systems to detect effective parameters in pipes corrosion such as temperature, H2S, and pH, has significantly reduced damages to industrial equipment of sewage pipelines caused by corrosion. This paper presents a critical review of the effective factors resulted in corrosion of sewer pipelines and discusses advanced sensing systems utilized for relevant monitoring. Also, microbiologically induced corrosion and effective factors are individually discussed. Moreover, various data analysis techniques adopted to evaluate sensors’ outputs for corrosion prediction have been explored. Finally, recommendations and future directions for improving sensing accuracy and robustness are detailed.