Practical Method for Estimating Time-Dependent Corrosion Depth of Uncoated Carbon Steel Plate under Atmospheric Environment using Fe/Ag Galvanic Couple ACM-Type Corrosion Sensor

Abstract

To maintain economically steel structures against corrosion damage, it is necessary to quantitatively clarify the corrosion environments of individual parts in the structures and to evaluate the time-dependent corrosion behavior. In this research, an evaluating method for the time-dependent corrosion depth of uncoated structural steel plates using Fe/Ag galvanic couple ACM type corrosion sensor was proposed. This method was focused on the environments with and without effect of rainfall and airborne sea salt. Atmospheric exposure tests were carried out on the uncoated steel plates in four fields in which the environments varied widely as a function of rainfall and airborne sea salt. In addition to this, the corrosive environments of the skyward- and groundward-facing surfaces of the plates were monitored using the ACM sensors.