info:eu-repo/semantics/article
Feasibility of the use of galvanic couples to develop corrosion sensors for reinforced concrete structures
Fecha
2019-08-01Registro en:
Torres Ramirez, Jhon Edisson; Duffó, Gustavo Sergio; Farina, Silvia Beatriz; Feasibility of the use of galvanic couples to develop corrosion sensors for reinforced concrete structures; NACE International; Corrosion; 75; 8; 1-8-2019; 990-998
0010-9312
1938-159X
CONICET Digital
CONICET
Autor
Torres Ramirez, Jhon Edisson
Duffó, Gustavo Sergio
Farina, Silvia Beatriz
Resumen
This investigation is a first step in the development of a simple sensor to be embedded in concrete structures to measure the corrosion rate of reinforcement steel (rebars) based on the principle of galvanic couple. To that end, suitability of using galvanic couple current monitoring as a method of sensing rebar corrosion was studied. Three different galvanic couples (carbon steel/stainless steel, carbon steel/copper, and carbon steel/titanium), as well as simple rebars, were embedded in mortar samples. The objective was to find out if there exists a correlation between the current of the galvanic couples and the real corrosion rate of the rebars in a wide range of environmental conditions. The measurement of the galvanic current showed the importance of the anodic/cathodic area ratio. It was found that when this ratio was 1:7 a relationship between the galvanic current of the carbon steel/copper couple and the corrosion current of the rebars could be established. Among the three galvanic couples proposed, the carbon steel/copper one seems to be the most promising with which to build a sensor.