1990 · 10 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceBridge EngineeringBuilding MaterialsCorrosion ScienceCorrosion EngineeringCorrosion In ConcreteCorrosion Of Construction MaterialsCorrosion Of SteelsCorrosion-resistant MaterialsPitting CorrosionBendingDelaminationEpoxy-coated ReinforcementPolarizationRebar CorrosionReinforced Concrete CorrosionReinforcement CorrosionReinforcing Steel
Extensive corrosion of epoxy-coated rebar has been observed in the substructures of bridges in the marine environment of Florida. The corrosion developed in less than ten years, and affected both fabricated and straight rebar. The damage is accompanied by disbondment of the epoxy coating, corrosion of the underlying metal, formation of large pits and eventual concrete delamination. Laboratory experiments showed that corrosion is accelerated by fabrication bending, and that certain polarization conditions during service can promote disbondment and corrosion of the type observed in the field. A possible mechanism of corrosion is presented.(A) For the covering abstract of the conference see IRRD 831449.