TY - JOUR
T1 - Cathodic Protection System Applied to Steel Using Fiber Sheet and Al-based Alloy Anode in Atmospheric Environment
AU - Yang, Muye
AU - Kainuma, Shigenobu
AU - Zhuang, Shusen
AU - Ishihara, Shuji
AU - Kaneko, Akira
AU - Yamauchi, Takao
N1 - Funding Information:
ACKNOWLEDGMENTS This work was kindly supported by JSPS KAKENHI Grant Numbers JP19H02227 and JP19K15074. The authors would like to thank Prof. W. Oshikawa from the University of the Ryukyus for his kind help concerning the atmospheric exposure tests and thank Mr. T. Sumitani from Japan Exlan Co., Ltd. for his contributions to the development work about 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.
Funding Information:
This work was kindly supported by JSPS KAKENHI Grant Numbers JP19H02227 and JP19K15074. The authors would like to thank Prof. W. Oshikawa from the University of the Ryukyus for his kind help concerning the atmospheric exposure tests and thank Mr. T. Sumitani from Japan Exlan Co., Ltd. for his contributions to the development work about 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 The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
PY - 2019
Y1 - 2019
N2 - In this study, we developed a cathodic protection (CP) system, which includes a sacrificial anode and a moisture-absorbent fiber sheet, and applied it to old steel structures exposed in a chloride environment, especially localized steel members susceptible to corrosion. Additionally, we evaluated the effects of environmental changes caused by the electrolyte and anodic material on the durability and effectiveness of the CP system. To verify the corrosion kinetics of steel affected by the sacrificial anode, electrochemical tests on binary and ternary alloys were conducted in an immersion environment and the corresponding electrochemical tests on specimens with CP were conducted in an indoor atmospheric environment. Moreover, the anti-corrosion mechanism and time-dependent current variations were clarified by conducting exposure corrosion tests. The test results demonstrated that the anodic reaction kinetics of Al-3Zn and Al-20Zn were similar; Al-based alloy could be a sacrificial anode with a stable activating reaction, providing sustained CP for steel through an aquiferous fiber sheet. Furthermore, the fiber sheet acted as an effective electrolyte in the atmospheric environment and led to a sustained anti-corrosion current and negative potential at the steel member. In addition, high chloride or nonuniform electrolyte was considered the reason for the occurrence of self-corrosion in a steel plate, which can be avoided by adjusting the dimensions of the exposed holes in the anode plate.
AB - In this study, we developed a cathodic protection (CP) system, which includes a sacrificial anode and a moisture-absorbent fiber sheet, and applied it to old steel structures exposed in a chloride environment, especially localized steel members susceptible to corrosion. Additionally, we evaluated the effects of environmental changes caused by the electrolyte and anodic material on the durability and effectiveness of the CP system. To verify the corrosion kinetics of steel affected by the sacrificial anode, electrochemical tests on binary and ternary alloys were conducted in an immersion environment and the corresponding electrochemical tests on specimens with CP were conducted in an indoor atmospheric environment. Moreover, the anti-corrosion mechanism and time-dependent current variations were clarified by conducting exposure corrosion tests. The test results demonstrated that the anodic reaction kinetics of Al-3Zn and Al-20Zn were similar; Al-based alloy could be a sacrificial anode with a stable activating reaction, providing sustained CP for steel through an aquiferous fiber sheet. Furthermore, the fiber sheet acted as an effective electrolyte in the atmospheric environment and led to a sustained anti-corrosion current and negative potential at the steel member. In addition, high chloride or nonuniform electrolyte was considered the reason for the occurrence of self-corrosion in a steel plate, which can be avoided by adjusting the dimensions of the exposed holes in the anode plate.
UR - http://www.scopus.com/inward/record.url?scp=85074251540&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85074251540&partnerID=8YFLogxK
U2 - 10.20964/2019.10.40
DO - 10.20964/2019.10.40
M3 - Article
AN - SCOPUS:85074251540
SN - 1452-3981
VL - 14
SP - 9858
EP - 9875
JO - International Journal of Electrochemical Science
JF - International Journal of Electrochemical Science
ER -