TY - JOUR
T1 - An evaluation on anti-corrosion performance of galvanized (zinc-coated) rebar in concrete by galvanostatic technique
AU - Hongbok-Choe,
AU - Nishio, Yuhei
AU - Kanematsu, Manabu
N1 - Publisher Copyright:
© 2019 International Committee of the SCMT conferences. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Galvanized rebar is known to perform an anti-corrosion effect by sacrificial anodic reaction of zinc. Meanwhile, accelerated corrosion test by galvanostatic method has been used to evaluate corrosion and/or anti-corrosion property of the rebar in concrete. However, in using this test on galvanized rebar, the influence of applied current density has not yet been clarified. In this study, to investigate adequate test condition, various range of applied current density, which is 20∼230μA/cm2, was tested on galvanized rebar embedded in concrete. As a result, galvanized rebar was found to perform the increase of polarization resistance (Rp) as the applied current density is lower. Furthermore, Rp showed the increasing behavior as corrosion has progressed. Moreover, the actual corrosion amount was shown smaller than the designed one by performing adequate anti-corrosion behavior. In conclusion, within 160μA/cm2 was assumed to be appropriate in the scope of this study.
AB - Galvanized rebar is known to perform an anti-corrosion effect by sacrificial anodic reaction of zinc. Meanwhile, accelerated corrosion test by galvanostatic method has been used to evaluate corrosion and/or anti-corrosion property of the rebar in concrete. However, in using this test on galvanized rebar, the influence of applied current density has not yet been clarified. In this study, to investigate adequate test condition, various range of applied current density, which is 20∼230μA/cm2, was tested on galvanized rebar embedded in concrete. As a result, galvanized rebar was found to perform the increase of polarization resistance (Rp) as the applied current density is lower. Furthermore, Rp showed the increasing behavior as corrosion has progressed. Moreover, the actual corrosion amount was shown smaller than the designed one by performing adequate anti-corrosion behavior. In conclusion, within 160μA/cm2 was assumed to be appropriate in the scope of this study.
KW - Concrete
KW - Corrosion
KW - Galvanized rebar
UR - http://www.scopus.com/inward/record.url?scp=85071121897&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85071121897
SN - 2515-3048
VL - 3
JO - Sustainable Construction Materials and Technologies
JF - Sustainable Construction Materials and Technologies
T2 - 5th International Conference on Sustainable Construction Materials and Technologies, SCMT 2019
Y2 - 14 July 2019 through 17 July 2019
ER -