2024-03-29T05:28:04Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/199352021-06-22T11:04:26Zcom_10261_29879com_10261_3com_10261_23col_10261_29880col_10261_276
DIGITAL.CSIC
author
Andrade Perdrix, Carmen
author
Garcés, Pedro
author
Martínez Sierra, Isabel
2010-01-12T09:11:36Z
2010-01-12T09:11:36Z
2008-07-29
Corrosion Science 50(10): 2959-2964 (2008)
0010-938X
http://hdl.handle.net/10261/19935
10.1016/j.corsci.2008.07.013
Chlorides induce localized corrosion in the reinforcement. The pits formed a substantial reduction in the cross-sectional area. The smaller is the ratio between the size of the corrosion spot and the surrounding passive metal area acting as cathode, the higher is the corrosion rate or the progression in the pit depth. This, however, is not always the case. To understand well the macro or microcell behavior of the corrosion of reinforcements, this paper reports a study on the effect of decreasing sizes of anodic zones until relatively small, maintaining the size of the cathode constant. In addition, to enhance the pure anodic behavior of the corroding zone, an acidic solution was used as an anolyte. Measuring the galvanic current (Ig) and the corrosion rate (Icorr) by using zero resistance ammeter (ZRA) and polarization resistance (Rp) techniques, respectively, was crucial to differentiate the microcell contribution from that of the macrocell. The results indicate that while Ig increased as the anodic area decreased, Icorr presented a maximum for the area ratios, SA/SC = 1/3.
eng
closedAccess
Steel reinforced concrete
Corrosion rate
Pitting corrosion
Galvanic currents and corrosion rates of reinforcements measured in cells simulating different pitting areas caused by chloride attack in sodium hydroxide
artículo
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URL
https://digital.csic.es/bitstream/10261/19935/3/accesoRestringido.pdf
File
MD5
42637ae8545636bc41605c1740a9a84e
15753
application/pdf
accesoRestringido.pdf