1992 · 19 citations · 4 references
Natural SciencesCivil EngineeringMaterials ScienceBridge EngineeringCorrosion ScienceElectrochemistryCorrosion EngineeringCorrosion EvaluationCorrosion In ConcreteCorrosion Of Construction MaterialsCorrosion TestingElectrochemical CorrosionCorrosion AssessmentCorrosion Rate EstimationCorrosion Rate MeasurementElectrochemical Corrosion TestingNon-destructive Evaluation Of CorrosionOpen-circuit PotentialOpen-circuit VoltageReinforcement Corrosion
Laboratory studies examined the myriad parameters affecting corrosion measurements made by electrochemical means. The most important parameters were: good electrical contact between the probe and the concrete surface; symmetic positioning of the probe over the rebar; presence of a stable open-circuit potential; use of a guard ring of appropriate size and spacing to define the polarized area; and the necessity of ensuring that measurements are carried out over the active part of macrocells. Three commercially developed corrosion rate devices were evaluated in the laboratory and the field. All gave comparable qualitative results for actively corroding conditions. Field tests were carried out at sites representing subtropical marine, mild and severe winter exposure conditions.
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