000 01726nab a2200205 4500
005 20260520000854.0
008 260224s2010 xxu
245 0 0 _aCorrosion of Epoxy-Coated rebar in Marine Bridges
_bPart 1:A 30-Year perspective
260 _a
_b
_cjun. 2010
270 _a02/07/2010 ; 01/07/2010
300 _a13 p. ; 065001
520 _aTranscripción del resumen del autor: The corrosion performance over a nearly 30-year service period of epoxy-coated rebar (ECR) in Florida marine bridges is presented. Severe ECR corrosion was noted earlier in several of those bridges, built with relatively high permeability concrete. Corrosion development took place later in some other structures with less permeable concrete, with instances where the corrosion was associated with preexisting cracks. Corrosion was found to be associated with coating imperfections and coating disbondment. Laboratory experiments and modeling indicated that macrocell coupling with remote cathodes was an aggravating factor. Quantitative damage functions relating the observed deterioration with service time of the affected bridges are presented. A predictive corrosion initiation-propagation model was developed and the model output is compared with the field results to identify suitable parameters for forecasting future rehabilitation needs. The prognosis for future corrosion development is discussed, with attention to corrosion of ECR in otherwise low-permeability concrete with preexisting cracks or local deficiencies.
581 _a6
773 0 _tCorrosion
_g66
942 _cARTICULO
100 1 _aSagüés, A.A.
_927138
100 1 _aLau, K.
_943340
100 1 _aPowers, R.G.
_943341
999 _c171635
_d171635