You are here

Initiation and propagation of corrosion in dry-cast reinforced concrete pipes

Download pdf | Full Screen View

Date Issued:
2013
Summary:
This study investigates corrosion initiation and propagation in instrumented specimens obtained from segments of dry-cast reinforced concrete pipes. Potential, LPR and EIS measurements were carried out. During the propagation stage in different exposures, reinforcement eventually reached negative potentials values, which suggest mass transfer limitations. So far these specimens show no visual signs of corrosion such as cracks or corrosion products with one exception; where corrosion products have reached the surface. Moreover, the apparent corrosion rate values obtained suggest high corrosion rate. No crack appearance so far, could be explained by the high porosity of the specimens; the corrosion products are filling these pores. It is speculated that although, there might be mass transfer limitations present, the current demanded by the anode is being balanced by a larger cathode area due to macrocell effects, since the high moisture conditions likely reduced the concrete resistivity and increased the throwing power.
Title: Initiation and propagation of corrosion in dry-cast reinforced concrete pipes.
135 views
52 downloads
Name(s): Balasubramanian, Hariharan
College of Engineering and Computer Science
Department of Ocean and Mechanical Engineering
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Date Issued: 2013
Publisher: Florida Atlantic University
Physical Form: electronic
Extent: x, 101 p. : ill. (some col.)
Language(s): English
Summary: This study investigates corrosion initiation and propagation in instrumented specimens obtained from segments of dry-cast reinforced concrete pipes. Potential, LPR and EIS measurements were carried out. During the propagation stage in different exposures, reinforcement eventually reached negative potentials values, which suggest mass transfer limitations. So far these specimens show no visual signs of corrosion such as cracks or corrosion products with one exception; where corrosion products have reached the surface. Moreover, the apparent corrosion rate values obtained suggest high corrosion rate. No crack appearance so far, could be explained by the high porosity of the specimens; the corrosion products are filling these pores. It is speculated that although, there might be mass transfer limitations present, the current demanded by the anode is being balanced by a larger cathode area due to macrocell effects, since the high moisture conditions likely reduced the concrete resistivity and increased the throwing power.
Identifier: 858621140 (oclc), 3362341 (digitool), FADT3362341 (IID), fau:4179 (fedora)
Note(s): by Hariharan Balasubramanian.
Thesis (M.S.C.S.)--Florida Atlantic University, 2013.
Includes bibliography.
Mode of access: World Wide Web.
System requirements: Adobe Reader.
Subject(s): Concrete -- Deterioration
Tubular steel structures -- Deterioration
Pipelines -- Design and construction
Concrete construction
Corrosion and anti-corrosives
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/3362341
Use and Reproduction: http://rightsstatements.org/vocab/InC/1.0/
Host Institution: FAU