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Automated Monitoring of Metal Corrosion for Water Delivery Infrastructure.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Automated Monitoring of Metal Corrosion for Water Delivery Infrastructure./
Author:	Ibarra Nieblas, Arisbeth.
Description:	1 online resource (197 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-03, Section: B.
Contained By:	Dissertations Abstracts International84-03B.
Subject:	Engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29322156click for full text (PQDT)
ISBN:	9798841726234

Automated Monitoring of Metal Corrosion for Water Delivery Infrastructure.
Ibarra Nieblas, Arisbeth.

Automated Monitoring of Metal Corrosion for Water Delivery Infrastructure. - 1 online resource (197 pages)

Source: Dissertations Abstracts International, Volume: 84-03, Section: B.

Thesis (Ph.D.)--The University of Arizona, 2022.

Includes bibliographical references

The real-time corrosion rate of mild steel in drinking water and the properties of that water are measured and recorded in time using a newly build computed automated system. A non-destructive electrochemical method is used to find the corrosion rate (CR) of mild steel coupons in time and these are compared to the average corrosion rate of a coupon determined by weight change. In the lab, at room temperature, when the pH is 7, typical corrosion rates of mild steel in synthetic drinking water (1000-2000 ppm Na2SO4 aqueous solution) in aerobic still water and aerobic water with bubbling air (100 sccm) are 64.8 µm yr-1 and 241.5 µm yr-1 determined electrochemically, and 27.9 microns per year and 81.5 microns per year determined gravimetrically. In comparison, the corrosion rates of mild steel in still anaerobic water with bubbling inert gas (100 sccm) are 18.9 µm yr-1 and 29.8 µm yr-1 determined electrochemically, and 27.9 µm yr-1 determined gravimetrically anaerobic water with bubbling inert gas (100 sccm).The computer automates and data logs two properties: 1) the corrosion rate of pipe metal in drinking water and 2) the water quality by using 6 in-line water sensors for flow, pressure, conductivity, temperature, dissolved oxygen, and pH. The corrosion rate of the metal in water is done by using a LabView program to control a power source to find the corrosion current which is converted to a corrosion rate of the metal. These measurements are repeated several times a day over several months. Using the automated system, the corrosion rate of mild steel in real water is typically 57.7 µm yr-1 after 11 days of immersed in drinking water and when the water properties are 200 ccm flow, 640 to 670 µS cm-1 conductivity, 26 to 27°C temperature, 10 ppm dissolved oxygen, and 7.5 to 7.7 pH. Knowing the rate of pipe corrosion as a function of water quality in time gives a rational guide for predicting pipe failure. The sponsor of this work, Tucson Water, plans to install corrosion and water monitoring stations at 10 nodes in Tucson's water grid to guide the scheduled maintenance of water delivery pipes to minimize the interruption of water service and the loss of drinking water.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798841726234Subjects--Topical Terms:

586835
Engineering.
Subjects--Index Terms:

CorrosionIndex Terms--Genre/Form:

542853
Electronic books.

Automated Monitoring of Metal Corrosion for Water Delivery Infrastructure.
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500 $a Source: Dissertations Abstracts International, Volume: 84-03, Section: B.
500 $a Advisor: Gervasio, Dominic.
502 $a Thesis (Ph.D.)--The University of Arizona, 2022.
504 $a Includes bibliographical references
520 $a The real-time corrosion rate of mild steel in drinking water and the properties of that water are measured and recorded in time using a newly build computed automated system. A non-destructive electrochemical method is used to find the corrosion rate (CR) of mild steel coupons in time and these are compared to the average corrosion rate of a coupon determined by weight change. In the lab, at room temperature, when the pH is 7, typical corrosion rates of mild steel in synthetic drinking water (1000-2000 ppm Na2SO4 aqueous solution) in aerobic still water and aerobic water with bubbling air (100 sccm) are 64.8 µm yr-1 and 241.5 µm yr-1 determined electrochemically, and 27.9 microns per year and 81.5 microns per year determined gravimetrically. In comparison, the corrosion rates of mild steel in still anaerobic water with bubbling inert gas (100 sccm) are 18.9 µm yr-1 and 29.8 µm yr-1 determined electrochemically, and 27.9 µm yr-1 determined gravimetrically anaerobic water with bubbling inert gas (100 sccm).The computer automates and data logs two properties: 1) the corrosion rate of pipe metal in drinking water and 2) the water quality by using 6 in-line water sensors for flow, pressure, conductivity, temperature, dissolved oxygen, and pH. The corrosion rate of the metal in water is done by using a LabView program to control a power source to find the corrosion current which is converted to a corrosion rate of the metal. These measurements are repeated several times a day over several months. Using the automated system, the corrosion rate of mild steel in real water is typically 57.7 µm yr-1 after 11 days of immersed in drinking water and when the water properties are 200 ccm flow, 640 to 670 µS cm-1 conductivity, 26 to 27°C temperature, 10 ppm dissolved oxygen, and 7.5 to 7.7 pH. Knowing the rate of pipe corrosion as a function of water quality in time gives a rational guide for predicting pipe failure. The sponsor of this work, Tucson Water, plans to install corrosion and water monitoring stations at 10 nodes in Tucson's water grid to guide the scheduled maintenance of water delivery pipes to minimize the interruption of water service and the loss of drinking water.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Engineering. $3 586835
650 4 $a Hydrologic sciences. $3 3168407
650 4 $a Civil engineering. $3 860360
650 4 $a Mechanical engineering. $3 649730
653 $a Corrosion
653 $a Metal corrosion
653 $a Monitoring corrosion
653 $a Steel pipe
653 $a Water deliver infrastructure
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0537
690 $a 0543
690 $a 0388
690 $a 0548
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a The University of Arizona. $b Environmental Engineering. $3 2104681
773 0 $t Dissertations Abstracts International $g 84-03B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29322156 $z click for full text (PQDT)