Browsing by Author "Bonifaz Barba, Gabriel Alejandro"

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Dataset of copper pipes corrosion after exposure to chlorine
(2018) García Ávila, Fausto Fernando; Bonifaz Barba, Gabriel Alejandro; Donoso Moscoso, Silvana Patricia; Flores de Pinos, Lisveth; Ramos Fernández, Lía
This article presents data on corrosion and dissolved copper in copper tubes that transport drinking water in domiciles of the Azogues city, Ecuador. Corrosion tests were performed using copper coupons exposed to water with different concentrations of free chlorine for 30, 60,90 and 180 days. The determination of the copper corrosion rate exposed in chlorine was carried out by means of gravimetric tests. With weight loss data, the corrosion rate was determined. By means of static immersion tests, copper release of coupon surface was determined. In the obtained data it was observed that the corrosion rate and the release of copper increases with the chlorine concentration. This data is beneficial for drinking water companies and building builders by providing information on the corrosion and leaching behavior of copper pipes when exposed to chlorine and is useful for predicting the service life copper pipes. In addition, it could allow assessing the health risk by consuming water with copper in solution.
Efecto del cloro en las tuberías domiciliarias de cobre expuestas al agua potable
(2018) Bonifaz Barba, Gabriel Alejandro; García Ávila, Fausto Fernando
Drinking water distribution networks have copper pipes commonly used in the branches of the main network to the users homes (home connections). When it are exposed to the aggressive characteristics of the water they transport; the water tend to cause wear due to the corrosive processes that originate inside the pipes. The objective of this work was to establish a relationship between the variation of the corrosion rate that occurs inside the copper pipes with the concentration of residual chlorine present in the drinking water of the distribution network. Copper corrosion coupons were installed in three locations with different concentrations of residual chlorine. In this way, the weight loss of each coupon was evaluated to establish corrosion rates in different periods of exposure. By linear regression it was observed that as the concentration of chlorine in the water increases, the variation of the corrosion rate and the release of dissolved copper from the coupons increases. Thus, equations of the corrosion rate for different periods of exposure were obtained, this allowed to evaluate the corrosive process that occurs in a distribution network knowing the concentration of residual chlorine present in the drinking water distribution. Also, was determined the areas most prone to failures in the piping systems of the residential connections, as well as their useful life.
Effect of residual chlorine on copper pipes in drinking water systems
(2019) Flores del Pino, Lisveth; Vazquez Garcia, Sandra Elizabeth; Sánchez Alvarracín, Carlos Mauricio; García Ávila, Fausto Fernando; Garcia Altamirano, Diana Catalina; Zhindón Arévalo, César; Bonifaz Barba, Gabriel Alejandro; Ramos Fernández, Lia
© 2019 Eastern Macedonia and Thrace Institute of Technology. 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.