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Corrosion behaviour of new duplex stainless steel reinforcements embedded in chloride contaminated concrete
The use of reinforcing stainless steels (SS) in concrete have proved to be one of the most effective methods to guarantee the passivity of reinforced concrete structures exposed to chloride contaminated environment. In this paper, the corrosion behaviour of a new duplex SS reinforcements with low nickel content (LND) (more economically compatible) was investigated and compared with the conventional austenitic AISI 304 SS and duplex AISI 2304 SS. Corrosion behaviour of ribbed SS reinforcements was studied in mortars with chloride content (0, 0.4, 2 and 4% Cl(-)) using linear polarization resistance and potentiostatic pulses technique, the corrosion potential E(corr) and linear polarization resistance Rp values were monitored over the exposure time. According to the results, the evolution of i(corr) values during the first year of exposure of the specimens does not present significant differences at different chloride content in mortar. The i(corr) values of the LND are in the same order of magnitude as i(corr) values of AISI 304 or AISI 2304, and always below the limit threshold of 0.1 µA/cm2 established for carbon steel.
Corrosion behaviour of new duplex stainless steel reinforcements embedded in chloride contaminated concrete
The use of reinforcing stainless steels (SS) in concrete have proved to be one of the most effective methods to guarantee the passivity of reinforced concrete structures exposed to chloride contaminated environment. In this paper, the corrosion behaviour of a new duplex SS reinforcements with low nickel content (LND) (more economically compatible) was investigated and compared with the conventional austenitic AISI 304 SS and duplex AISI 2304 SS. Corrosion behaviour of ribbed SS reinforcements was studied in mortars with chloride content (0, 0.4, 2 and 4% Cl(-)) using linear polarization resistance and potentiostatic pulses technique, the corrosion potential E(corr) and linear polarization resistance Rp values were monitored over the exposure time. According to the results, the evolution of i(corr) values during the first year of exposure of the specimens does not present significant differences at different chloride content in mortar. The i(corr) values of the LND are in the same order of magnitude as i(corr) values of AISI 304 or AISI 2304, and always below the limit threshold of 0.1 µA/cm2 established for carbon steel.
Corrosion behaviour of new duplex stainless steel reinforcements embedded in chloride contaminated concrete
Korrosionsverhalten neuer, in chloridhaltigem Beton eingebetteter Betonstähle aus nichtrostenden Duplex-Stählen
Medina, E. (author) / Cobo, A. (author) / Bastidas, D.M. (author)
2011
8 Seiten, 5 Bilder, 2 Tabellen, 20 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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