TY - JOUR
T1 - Atmospheric corrosion protection method for corroded steel members using sacrificial anode of Al-based alloy
AU - Yang, Muye
AU - Kainuma, Shigenobu
AU - Ishihara, Shuji
AU - Kaneko, Akira
AU - Yamauchi, Takao
N1 - Funding Information:
This research was supported by JSPS KAKENHI under Grant Numbers JP19K15074 and JP19H02227. The authors would like to thank Prof. W. Oshikawa from the University of Ryukyus for his kind help concerning the atmospheric exposure tests and Mr. T. Sumitani from Japan Exlan Co. Ltd. for his contributions to the development work on the property study of fiber sheets in this paper. The authors are also grateful to Y. Tsuchihashi from Shutoko Metropolitan Expressway Co. Ltd. and H. Fujimoto from Metawater Co. Ltd. for helping with the indoor exposure test and the atmospheric exposure test during their Master's course internship in Kyushu University. All data included in this study are available upon request by contacting with the corresponding author.
Funding Information:
This research was supported by JSPS KAKENHI under Grant Numbers JP19K15074 and JP19H02227 . The authors would like to thank Prof. W. Oshikawa from the University of Ryukyus for his kind help concerning the atmospheric exposure tests and Mr. T. Sumitani from Japan Exlan Co., Ltd. for his contributions to the development work on the property study of fiber sheets in this paper. The authors are also grateful to Y. Tsuchihashi from Shutoko Metropolitan Expressway Co., Ltd. and H. Fujimoto from Metawater Co., Ltd., for helping with the indoor exposure test and the atmospheric exposure test during their Master's course internship in Kyushu University .
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/2/20
Y1 - 2020/2/20
N2 - This paper proposes a new cathodic protection (CP) system, for steel members vulnerable to corrosion damage in the atmospheric environment. To ensure that this system is suitable for the atmospheric environment, an absorbent fiber sheet is considered as the electrolyte carrier. The independent performance of each component and the combined effectiveness of the CP system are studied by conducting a water absorption test and electrochemical tests using various concentrated NaCl solutions. In addition, the effects of the activator elements (Zn and In) on the galvanic coupling characteristics are investigated through an indoor test. The system durability is verified in an aggressive atmospheric environment, where CP continues for 15 months effectively without any manual intervention. In practice, the CP system's effectiveness is reflected in the continuous anti-corrosion current as well as the change in the reducing environment at the steel surface, but a change in the local environment at the steel interface is more likely to restore passivity. Finally, by modeling the corrosion reactions and variations in a rust film under wet-dry cycles, we suggest that the steel members of a roughly cleaned surface can be protected by the CP system even in the presence of residual rust.
AB - This paper proposes a new cathodic protection (CP) system, for steel members vulnerable to corrosion damage in the atmospheric environment. To ensure that this system is suitable for the atmospheric environment, an absorbent fiber sheet is considered as the electrolyte carrier. The independent performance of each component and the combined effectiveness of the CP system are studied by conducting a water absorption test and electrochemical tests using various concentrated NaCl solutions. In addition, the effects of the activator elements (Zn and In) on the galvanic coupling characteristics are investigated through an indoor test. The system durability is verified in an aggressive atmospheric environment, where CP continues for 15 months effectively without any manual intervention. In practice, the CP system's effectiveness is reflected in the continuous anti-corrosion current as well as the change in the reducing environment at the steel surface, but a change in the local environment at the steel interface is more likely to restore passivity. Finally, by modeling the corrosion reactions and variations in a rust film under wet-dry cycles, we suggest that the steel members of a roughly cleaned surface can be protected by the CP system even in the presence of residual rust.
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U2 - 10.1016/j.conbuildmat.2019.117405
DO - 10.1016/j.conbuildmat.2019.117405
M3 - Article
AN - SCOPUS:85074275905
SN - 0950-0618
VL - 234
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 117405
ER -