Pollution of drinking water transported by corroded metallic pipelines

Abstract

Corrosion of metallic water pipelines is a function of the pipe's surrounding environment (soil and water). This means that it is important to know the physical and chemical characteristics of the pipe's surrounding environment. The corrosion of externally unprotected metallic water pipelines, particularly ductile iron pipes, in localities with aggressive soil conditions is becoming a significant problem: repair and replacement costs are high, and failures cause supply interruptions to customers and inconvenience to the public. Anti-corrosive protection for metallic water pipelines, their fittings and accessories is very important, because they may be attacked by corrosion with time. The tendency of a metallic substrate to corrode is a function of the surface characteristics of the metal and of the metal/protective film interface, the physical, electrical and electrochemical properties of the film, and the nature of the environment in which the pipelines system is placed.In this work the authors have looked at the corrosion problems of metallic water pipelines and their control. The corrosive properties of water and soil environments are reviewed. Parameters affecting corrosion are discussed. The pollution of drinking water transported by metallic pipes caused by corrosion is discussed. The purpose of this work is to provide guidelines for materials selection in water and soil environments, and how the water pipelines can be protected against metallic corrosion. Keywords: corrosion of metallic water pipelines, drinking water pollution, corrosive water, metallic water pipes.

Sources of and Solutions to Toxic Metal and Metalloid Contamination in Small Rural Drinking Water Systems: A Rapid Review

“…As with installation, maintenance should only be carried out by trained personnel, which helps avoid the introduction of parts with unsafe TM levels and the application of modifications that do not meet system specifications [ 9 , 37 ]. To prevent excessive damage to and corrosion of water system parts, maintenance should be conducted on a consistent preventive schedule, instead of only in response to problems [ 37 , 49 ].…”

“…Another option is to line or coat parts with materials such as epoxy, resin, or polytetrafluoroethylene (“Teflon ® ”) to reduce exposed metal surface area over which corrosion can occur [ 45 , 49 , 63 ]. The effectiveness of this method is inconsistent.…”

Analysis and ranking of corrosion causes for water pipelines: a critical review

“…Different soil types existed based on the texture of the soil and grain size such as clay, sandy, gravel, sand clay loam, clay loam, silty clay loam, silty clay and silt loam sand, and clay silt, among others 28 . Soil with high alkalinity such as in sandy soil may impose the general corrosion problem 29 . The soil particle size is an understudied factor related to the soil types and can influence the corrosion behavior 17 .…”

“…The process began with the contact of bacterial organisms to the pipe-surface caused by chemical and environmental changes in the soil. This interaction will produce several corrosive substances, including carbon dioxide, hydrogen sulphide, ammonia, and organic and inorganic acids 29 . The MIC and pitting corrosion will occur where these substances are present.…”

Adsorption Isotherm Studies on Methylene Blue Dye Removal Using Naturally Available Biosorbent

“…2 Industries are required to control their discharge by using some measures for environmental protection. 3,4 Generally, the effluents from textile industries contain various chemicals, primarily dyes, employed for treatments such as scouring, dyeing and finishing of textiles. Lubricants used in waving equipment, spinning equipment and knitting and other equipment also reach these effluents along with additive chemicals.…”