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Passive corrosion of steel reinforcement in blended cement-based material in the context of nuclear waste disposal.
- Source :
-
Corrosion Engineering, Science & Technology . 2017Supplement, Vol. 52, p148-154. 7p. 3 Charts, 3 Graphs. - Publication Year :
- 2017
-
Abstract
- An experimental campaign was carried out to study the passivity of steel embedded in blended cement paste. Mockup samples made of steel coupons (milled or pre-corroded) embedded in cement paste were tested under controlled relative humidity or in a solution simulating clay underground water and under aerated and de-aerated conditions, during up to 3 years. The results of gravimetric measurements show that the average corrosion rates determined on milled coupons are lower than 1 µm/year and vary from 0.2 to 2.7 µm/year for pre-corroded coupons. An apparent passive corrosion state is reached rapidly whatever the environmental conditions. Moreover, solid characterisations (Raman spectroscopy and SEM-EDS) point to a stable state in terms of the nature of the corrosion products and of the composition of the steel/cement paste interface. These results are similar to the ones previously obtained for steel coupons embedded in Portland cement mortar. This paper is part of a supplement on the 6th International Workshop on Long-Term Prediction of Corrosion Damage in Nuclear Waste Systems. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1478422X
- Volume :
- 52
- Database :
- Academic Search Index
- Journal :
- Corrosion Engineering, Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 134434495
- Full Text :
- https://doi.org/10.1080/1478422X.2017.1300378