Effect of chloride ions concentrations to breakdown the passive film on rebar surface exposed to l-arginine containing pore solution
- Authors
- Singh, Jitendra Kumar; Mandal, Soumen; Lee, Han-Seung; Yang, Hyun-Min
- Issue Date
- Oct-2021
- Publisher
- MDPI
- Keywords
- Concrete pore solution; Corrosion; Electrochemical impedance spectroscopy; Passive film; Scanning electron microscopy; Steel rebar
- Citation
- Materials, v.14, no.19, pp.1 - 18
- Indexed
- SCIE
SCOPUS
- Journal Title
- Materials
- Volume
- 14
- Number
- 19
- Start Page
- 1
- End Page
- 18
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/108203
- DOI
- 10.3390/ma14195693
- ISSN
- 1996-1944
- Abstract
- In the present study, 0.115 M L-arginine (LA) has been used as an eco-friendly inhibitor in simulated concrete pore solutions (SP-0) in order to form passive films on a steel rebar–solution interface until 144 h. Hence, 0.51 (SP-1) and 0.85 M NaCl (SP-2) were added in LA containing SP-0 solution to breakdown the passive film and to initiate corrosion reactions. The electrochemical results show that the charge transfer resistance (Rct) of steel rebar exposed to SP-1 and SP-2 solutions increased with respect to immersion periods. The sample exposed to the SP-2 solution initiated the corrosion reaction at the steel rebar–solution interface after 24 h of NaCl addition and formed pits; on the other hand, the sample without NaCl added, i.e., SP-0, showed agglomeration and dense morphology of corrosion products. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
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