Service life estimation of reinforced concrete structures made using Cr-bearing rebars in microcell corrosion environments
- Authors
- Tae, Sung-Ho; Kyung, Je-Woon; Ujiro, Takumi; Shin, Sung-Woo
- Issue Date
- Sep-2007
- Publisher
- Nippon Tekko Kyokai/Iron and Steel Institute of Japan
- Keywords
- Cr-bearing rebar; service life estimation; microcell corrosion
- Citation
- ISIJ International, v.47, no.9, pp.1315 - 1323
- Indexed
- SCOPUS
- Journal Title
- ISIJ International
- Volume
- 47
- Number
- 9
- Start Page
- 1315
- End Page
- 1323
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/44387
- DOI
- 10.2355/isijinternational.47.1315
- ISSN
- 0915-1559
- Abstract
- Reinforced concrete structures made using Cr-bearing rebars subject to microcell corrosion were assumed with the aim of developing Cr-bearing rebars having the required corrosion resistance in microcell corrosion environments. Their service lives were then estimated for each type of corrosion environment based on a microcell corrosion rate model, and requirements for Cr-bearing rebars to achieve a service life of over 100 years were calculated. As a result, the service lives of concrete structures reinforced with Cr-bearing rebars were found to increase as the Cr content increased in all types of corrosion environments. Also, Cr-bearing rebars with Cr contents of not less than 11% and not less than 7% ensured service lives of over 100 years in harsh and moderate chloride attack zones, respectively. In carbonation zones, a Cr content of not less than 3% was proven to provide corrosion resistance for over 100 years.
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