Effect of Phosphate-Based Inhibitor on Corrosion Kinetics and Mechanism for Formation of Passive Film onto the Steel Rebar in Chloride-Containing Pore Solution
- Title
- Effect of Phosphate-Based Inhibitor on Corrosion Kinetics and Mechanism for Formation of Passive Film onto the Steel Rebar in Chloride-Containing Pore Solution
- Author
- 박태준
- Keywords
- steel; concrete pore solution; corrosion; inhibitor; electrochemical impedance spectroscopy; Raman spectroscopy
- Issue Date
- 2020-08
- Publisher
- MDPI AG
- Citation
- MATERIALS, v. 13, no. 16, Article no. 3642, 24pp
- Abstract
- In the present study, different contents, i.e., 1-3% of 0.5 M ammonium phosphate mono basic (APMB), were used as corrosion inhibitor to reduce the corrosion of steel rebar. Electrochemical impedance spectroscopy (EIS) results showed that up to 24 h of exposure, polarization resistance (R-p) and passive/oxide film resistance (R-o) gradually decreased in simulated concrete pore (SCP) + 3.5 wt.% NaCl solution owing to the reduction in pH of the solution. The steel rebar exposed in 2% inhibitor containing SCP + 3.5 wt.% NaCl solution exhibited 90% inhibition efficiency after 1 h of exposure. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy confirmed the formation of thermodynamically very stable and sparingly soluble goethite (alpha-FeOOH), maghemite (gamma-Fe2O3), and iron phosphate (FePO4) as passive/oxide film onto the steel rebar surface exposed to 2% inhibitor containing SCP + 3.5 wt.% NaCl solution.
- URI
- http://eds.a.ebscohost.com/eds/detail/detail?vid=0&sid=4742c31f-b336-4e0f-aaa9-b1a6fc847089%40sessionmgr4008&bdata=Jmxhbmc9a28mc2l0ZT1lZHMtbGl2ZQ%3d%3d#AN=edselc.2-52.0-85090183779&db=edselchttps://repository.hanyang.ac.kr/handle/20.500.11754/164717
- ISSN
- 1996-1944
- DOI
- 10.3390/MA13163642
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ROBOT ENGINEERING(로봇공학과) > Articles
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