Study on the corrosion behavior of reinforcing steel in simulated concrete pore solutions using in situ Raman spectroscopy assisted by electrochemical techniques
✍ Scribed by Wen Chen; Rong-Gui Du; Chen-Qing Ye; Yan-Feng Zhu; Chang-Jian Lin
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 558 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
In situ Raman spectroscopy, electrochemical impedance spectroscopy (EIS) and polarization curves were used to study the corrosion behavior of reinforcing steel in simulated concrete pore (SCP) solutions (saturated Ca(OH) 2 solutions). Results indicated that the reinforcing steel remained passive in chloridefree SCP solutions. However, the anodic polarization curve of the steel did not exhibit a stable passive region in the SCP solution with 0.5 M NaCl, the corrosion current density exceeded 0.1 A cm -2 , the steel surface was unstable with chloride attack and localized corrosion appeared on it with FeCO 3 and Fe 2 O 3 as the main corrosion products.