DETERMINATION OF CHLORIDE CORROSION THRESHOLD FOR METALS EMBEDDED IN CEMENTITIOUS MATERIAL

摘要

The chloride corrosion threshold of a metal embedded (11) in a cementitious structure (14) is determined in an accelerated manner by using an electric field (41, 42) to increase the rate of migration of chloride ion into the structure (14) and monitoring the interface between the metal (11) and the cementitious material (26) in structure (14) to detect the onset of corrosion, then determining the chloride corrosion threshold, which is defined as the chloride content of the cementitious material (26) once corrosion has begun. This determination can be performed over a time period of as little as 2 to 3 weeks rather than the months or years required by conventional chloride corrosion test procedures.