| Download | - View accepted manuscript: Corrosion characteristics and key electrochemical factors in patch repair (PDF, 644 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1139/L05-088 |
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| Author | Search for: Zhang, J. Y.1; Search for: Mailvaganam, N. P.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Research in Construction
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| Format | Text, Article |
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| Subject | patch repair, patching materials, substrate, corrosion, macrocell, microcell; Concrete |
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| Abstract | Corrosion of concrete reinforcement at a patch repair is a complex problem, and current knowledge of its mechanism is quite limited. This review examined the correlation between two corrosion mechanisms, macrocell and microcell corrosion, from fundamental electrochemical principles. It was found that both mechanisms could play significant roles in inducing corrosion damage, contrary to the prevailing opinion that macrocell corrosion is the main deterioration mechanism in patch repair. This has practical implications that need to be considered for an effective and durable repair. A review of the studies done to date also enabled the identification of the key factors in patch repair controlling the corrosion characteristics. Corrosion could occur at different locations in the vicinity of the patch - substrate, interface, or patch area - depending on the respective electrochemical environments induced by the repair material properties and treatments, as well as the in-service exposure and mechanical loading. The review indicates that much of the needed research should focus on identification of corrosion mechanisms to effect successful patch repair in reinforced concrete structures. |
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| Publication date | 2006-06-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 47654
NRC-IRC-16787 |
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| NPARC number | 20377282 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | beba5564-c8dc-4fc9-879c-6289319fa552 |
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| Record created | 2012-07-24 |
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| Record modified | 2020-04-22 |
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