- Title
- New results for the corrosion of reinforcement in marine environments
- Creator
- Melchers, R. E.; Chaves, I. A.
- Relation
- Annual Conference of the Australasian Corrosion Association 2014: Corrosion and Prevention 2014. Proceedings of the Annual Conference of the Australasian Corrosion Association 2014: Corrosion and Prevention 2014 (Darwin, N.T. 21-24 September, 2014) p. 328-340
- Relation
- http://www.corrosion.com.au/Library/Publications/articleType/Search?Search=New+results+for+the+corrosion+of+reinforcement+in+marine+environments
- Publisher
- Australasian Corrosion Association
- Resource Type
- conference paper
- Date
- 2014
- Description
- The apparently premature corrosion of steel reinforcement in reinforced concrete structures exposed to marine environments continues to be a matter of concern in practice despite decades of research effort and much research funding expenditure and despite much practical experience. Herein results are reported of a long-term (10 year) study of the influence of alkalis on the corrosion initiation and progression of 6mm diam. reinforcing bars centrally embedded in 40x40x160mm concrete specimens. These were made with seawater as mixing water and with a variety of mix proportions including some with added alkalis. All were equally well compacted by vibration. After 10 years continuous exposure in a fog-room only a limited amount of corrosion initiation was observed. These results are in stark contrast with those reported in the famous paper by Shalon & Raphael (1959) who found serious corrosion of reinforcement after only 1-2 years exposure for all mixes. It is shown herein that the corrosion loss trends in those tests are similar to those of steel exposed directly to seawater. This indicates that in the 1959 tests the concrete provided little protection against reinforcement corrosion. The reasons for this are considered herein and the practical implications discussed.
- Subject
- alkalinity; corrosion; long-term; reinforcment; seawater
- Identifier
- http://hdl.handle.net/1959.13/1300026
- Identifier
- uon:19998
- Identifier
- ISBN:9781634395441
- Language
- eng
- Full Text
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