Corrosion Tests at the Water Treatment Plant in Jakubany / Korózne Skúšky Na Úpravní Vody Jakubany

Galík, Matúš; Kriš, Jozef; Ilavský, Ján

doi:10.1515/gse-2015-0006

Cited by 1 publication

(3 citation statements)

References 5 publications

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“…The average free chlorine concentration in these storage tanks was 0.85 mg/L. Coupons were installed for a period of one, two, three and six months following the recommendations by Baboian (2005) [42], Galik et al (2015) [34] and Fateh et al (2017) [38]. For reproducibility, each test was performed in duplicate [51].…”

Section: Implementation Of Corrosion Controls In the Treatment Plantmentioning

confidence: 99%

“…Coupons provide a viable technique to determine the corrosion rate caused by water in supply networks without affecting the system integrity [32]. Coupons can be installed directly into distribution system for a specific time to later evaluate the corrosion rate related to a metal under study; this technique allows to obtain a good level of corrosion estimation, at the same time it allows to visualize metal morphology [33,34].…”

Section: Introductionmentioning

confidence: 99%

“…There are several standards for such tests, but the most used methods are those recommended by ASTM (2003) [41]. The exposure times most commonly used in this type of tests is one, two or three months [42], whereas Finsgar (2013) [43], Galik et al (2015) [34] and Fateh et al (2017) [38] suggest that the exposure time of the coupons into water should be six months. During the first hours or days of metal exposure to water, the corrosion rate is very high, with the passage of time, this corrosion decreases until the metal surface acquires passivation [44].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Residual Chlorine on Copper Pipes in Drinking Water Systems

García-Ávila¹,

Pino²,

Bonifaz-Barba³

et al. 2019

JESTR

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Copper pipes corrosion that transport potable water can deteriorate water quality within a distribution system, releasing high copper amounts, exceeding the maximum concentration copper for potable water standards. This study examines the influence of free chlorine on the leaching of copper in the pipes used for the distribution of drinking water. A series of tests was carried out using corrosion test coupons extractable constructed of copper material. The coupons were installed in units containing filtered water (without chlorine, 0 mg/L) and water treated with an average residual chlorine concentration of 0.85 mg/L in the water treatment plant in Azogues city, Ecuador. A corrosion test rack was also installed in a house with an average residual chlorine concentration of 0.37 mg/L. Coupons in these sites were exposed in duplicate for one, two, three and six months. The corrosion coupons were then extracted and weighed to establish the corrosion rate by gravimetric technique. Additional tests were performed in static immersion laboratory tests using drinking water with chlorine concentrations ranging from 0.25 to 5 mg/L for one month. The weight loss tests indicated that an increase in free chlorine concentration, the greater release of copper and therefore a higher corrosion rate.

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