Electrochemical Characterization of a Solid Embeddable Ag/AgCl Reference Electrode for Corrosion Monitoring in Reinforced Concrete
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- JIN Ming
- College of Mechanics and Materials, Hohai University
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- XU Jinxia
- College of Mechanics and Materials, Hohai University
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- JIANG Linhua
- College of Mechanics and Materials, Hohai University
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- GAO Guofu
- College of Mechanics and Materials, Hohai University
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- CHU Hongqiang
- College of Mechanics and Materials, Hohai University
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- XIONG Chuansheng
- College of Mechanics and Materials, Hohai University
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- GAO Hailang
- College of Mechanics and Materials, Hohai University
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- JIANG Peng
- College of Mechanics and Materials, Hohai University
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抄録
In this study, a new solid embeddable Ag/AgCl reference electrode (RE) was electrochemically investigated for corrosion monitoring in reinforced concrete. The electrode was fabricated by applying the cement mortar as the bottom layer, and the polymer gel as electrolyte. Several electrochemical methods were applied. The experiments were carried out in simulated concrete solutions and concrete. Furthermore, an exposure period over 1 year was used to evaluate the stability of the electrodes embedded in concrete. It has been found that the electrode potential was not obviously affected by the chloride concentration, but affected by the pH value of solution. The Ag/AgCl RE had uniformity in concrete environments. The reversibility of Ag/AgCl RE in all solutions is only within ±4 mV. Besides, potentiodynamic tests revealed that the Ag/AgCl RE had a high exchange current density, which was advantageous when using Ag/AgCl RE to conduct resistance tests. Galvanostatic application of 0.2 µA/cm2 caused little variation of potential with time (∼30 mV in several days), indicating the presence of a finite polarization resistance. As a result, the new solid Ag/AgCl RE was suitable as a sensor electrode for concrete structures.
収録刊行物
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- Electrochemistry
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Electrochemistry 82 (12), 1040-1046, 2014
公益社団法人 電気化学会
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詳細情報 詳細情報について
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- CRID
- 1390001206499251840
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- NII論文ID
- 130004714322
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- NII書誌ID
- AN00151637
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- ISSN
- 21862451
- 13443542
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- NDL書誌ID
- 025950205
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用可