Corrosion of Water Pipes: a Comprehensive Study of Deposits

Abstract

Corrosion scales play an important role in modifying water quality in drinking water distribution systems. The corrosion scales from old water pipe lines were analyzed for their structure and composition. This paper presents the results of comprehensive study of deposits found in water distribution system of Ulhasnagar city of Maharashtra, India. Scales were investigated by XRD, FTIR, SEM and ED's analytical techniques. It was found that goethite, magnetite, lepidocrocite, hematite and Akaganite were identified as the primary constituents of brown deposits. The corrosion scales had a shell-like, enveloping layer, covering porous deposits of iron oxide phases. Our studies were able to identify important constituents of three different pipes of water distribution systems. Akaganite was found to be present in chloride environment. Along with iron hydroxide phases it was found that corrosion product also contain some organic matter which may be due to adsorption of biofilm on the surface of pipe. Further studies are needed to establish the role of corrosion scales in the mechanism of iron release from corroded pipes.

Deposition of fine iron oxide particles in tap water using electrophoretic deposition (EPD) technique

“…Table 2 summarizes the average particle sizes, zeta potential values and isoelectric points (IEP) of fine iron oxide particles in all the samples after centrifugation (supernatant). [3,34] also found iron oxide polymorphs in drinking water samples. The XRD peaks of synthesized iron oxide particles from the co-precipitation method consist of magnetite (Fe 3 O 4 ) and maghemite (␥-Fe 2 O 3 ), which is expected from the reaction of FeCl 3 and FeCl 2 (ratio 2:1) with de-ionized water, as highlighted by the previous work [27].…”

Effet des bactéries sur la corrosion d’un acier en contexte nucléaire : caractérisation par une approche multi-techniques (microscopie optique,μRaman et MEB-EDS)

“…La Figure 4 présente une micrographie optique de la morphologie des produits de corrosion présents en surface de ce coupon. Ces morphologies font penserà celles rapportées dans la bibliographie, dénommées (( flowery structures )) et attribuéesà des oxy-hydroxydes de fer(III) [36][37][38][39].…”

Effective Factors in Causing Leakage in Water Supply Systems and Urban Water Distribution Networks

“…The corrosion of the pipes has an important role in the quality of the water. Some of the corrosions of the pipes are as follow [4]:…”