A study on the corrosion resistance of Cr-bearing rebar in mortar in corrosive environments involving chloride attack and carbonation
- Authors
- Tae, Sung-Ho; Ujiro, Takumi
- Issue Date
- May-2007
- Publisher
- Nippon Tekko Kyokai/Iron and Steel Institute of Japan
- Keywords
- Cr-bearing rebar; corrosion resistance; chloride attack; carbonation; corrosion rate
- Citation
- ISIJ International, v.47, no.5, pp.715 - 722
- Indexed
- SCIE
SCOPUS
- Journal Title
- ISIJ International
- Volume
- 47
- Number
- 5
- Start Page
- 715
- End Page
- 722
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/181944
- DOI
- 10.2355/isijinternational.47.715
- ISSN
- 0915-1559
- Abstract
- Nine types of reinforcing steels having different Cr contents were placed in mortar simulating environments involving chloride attack, carbonation, and combined deterioration and subjected to corrosion-accelerating test for fundamental research on the corrosion resistance of Cr-bearing rebars in corrosive environments where reinforced concrete structures are to be constructed. The polarization resistance and corrosion potential of Cr-bearing rebars were then measured at temperatures of 60, 40, and 20 degrees C to investigate their electrochemical properties in corrosive environments. Their corrosion area and average corrosion rate at the end of 40 cycles of corrosion-accelerating testing were also calculated to investigate their corrosion resistance. As a result, the corrosion resistance of Cr-bearing rebars was found to increase as their Cr content increases in all corrosive environments, and the excellent corrosion resistance of Cr-bearing rebars with Cr contents of 5 % or more and 7 % or more was confirmed in uncarbonated and carbonated environments, respectively, with a chloride ion content of 1.2 kg/m(3).
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