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Corrosion initiation and propagation on corrosion resistant alloys embedded in concrete by accelerated chloride transport

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Date Issued:
2013
Summary:
Two duplex stainless steels rebars: UNS32304SS and UNS32101SS, were selected to investigate the corrosion initiation and propagation in reinforced concrete specimens. The investigation is divided in two phases with two different methods to accelerate the transport of chlorides through the concrete and initiate corrosion in a short period of time. After corrosion had initiated and propagated for some time; selected specimens were terminated for visual examination. On specimens selected for autopsy, the rebars in the top row showed corrosion to various degrees. Corrosion had propagated to such extent on the terminated specimens that the specimen showed cracks. Stray current might have caused accelerated corrosion on rebars where corrosion had initiated. Based on chloride concentrations measured at the rebar trace, corrosion initiated: on S32101 rebars on average at 7.9 kg/m3, and S32101 rebars on average at 6.0 kg/m3. The findings suggest that S32304 rebars corroded at a slower than S32101.
Title: Corrosion initiation and propagation on corrosion resistant alloys embedded in concrete by accelerated chloride transport.
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Name(s): Gutierrez Tellez, Francisco.
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: xii, 104 p. : ill. (some col.)
Language(s): English
Summary: Two duplex stainless steels rebars: UNS32304SS and UNS32101SS, were selected to investigate the corrosion initiation and propagation in reinforced concrete specimens. The investigation is divided in two phases with two different methods to accelerate the transport of chlorides through the concrete and initiate corrosion in a short period of time. After corrosion had initiated and propagated for some time; selected specimens were terminated for visual examination. On specimens selected for autopsy, the rebars in the top row showed corrosion to various degrees. Corrosion had propagated to such extent on the terminated specimens that the specimen showed cracks. Stray current might have caused accelerated corrosion on rebars where corrosion had initiated. Based on chloride concentrations measured at the rebar trace, corrosion initiated: on S32101 rebars on average at 7.9 kg/m3, and S32101 rebars on average at 6.0 kg/m3. The findings suggest that S32304 rebars corroded at a slower than S32101.
Identifier: 859864663 (oclc), 3362380 (digitool), FADT3362380 (IID), fau:4186 (fedora)
Note(s): by Francisco Gutierrez Tellez.
Thesis (M.S.C.S.)--Florida Atlantic University, 2013.
Includes bibliography.
Mode of access: World Wide Web.
System requirements: Adobe Reader.
Subject(s): Concrete -- Corrosion
Concrete construction
Reinforced concrete -- Chemical resistance
Steel, Structural -- Corrosion
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/3362380
Use and Reproduction: http://rightsstatements.org/vocab/InC/1.0/
Host Institution: FAU