Influence of carbonation on chloride-induced reinforcement corrosion in simulated concrete pore solutions

Liu, Rong; Jiang, Linhua; Xu, Jinxia; Xiong, Chao; Zhang, Song

doi:10.1016/j.conbuildmat.2014.01.030

Cited by 126 publications

(56 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Simulated concrete pore solution mainly consists of saturated Ca(OH) 2 , KOH, and NaOH with the pH 13.5 [16]. However in numerous studies of rebar corrosion, saturated Ca(OH) 2 has been used a substitute for pore solution.…”

Section: Preparation Of Simulated Concrete Pore Solution (Scps)mentioning

confidence: 99%

Study of surface morphology and inhibition efficiency of mild steel in simulated concrete pore solution by lactic acid–Zn2+ system

2017

Int. J. Corros. Scale Inhib.

View full text Add to dashboard Cite

The inhibition efficiency (IE) of lactic acid-Zn 2+ system in controlling corrosion of mild steel in simulated concrete pore solution (SCPS) prepared in well water in the absence and presence of Zn 2+ has been investigated by weight loss study. The formulation consisting of 250 ppm of lactic acid and 50 ppm of Zn 2+ provides 94% of inhibition efficiency. Inhibition was found to increase with an increasing concentration of lactic acid and Zn 2+ . Polarization resistance was measured by weight loss method, polarization study. The surface morphology has been investigated by SEM and AFM.

show abstract

Section: Preparation Of Simulated Concrete Pore Solution (Scps)mentioning

confidence: 99%

Study of surface morphology and inhibition efficiency of mild steel in simulated concrete pore solution by lactic acid–Zn2+ system

2017

Int. J. Corros. Scale Inhib.

View full text Add to dashboard Cite

show abstract

“…11, which has been used by other authors. 4,22,23 The R s in high frequency is the solution resistance and the time constant in high frequency (C f and R f ) reflects the information of the passive film. Furthermore, the time constant in low frequency (C dl and R ct ) is related to the information of the corrosion reaction on the steel surface.…”

Section: Eis Measurement Of Steel In Concretementioning

confidence: 99%

“…4 All these techniques call for a reliable reference electrode (RE) which can be embedded in concrete for the reason that the passive/active conditions of steel investigated by the external RE are not accurate. 5 The liquid based saturated calomel electrode (SCE) is conventionally used for most laboratory studies in alkaline environments due to its compatibility and easy use, however, this electrode is prepared from mercury and hence any leakage may lead to pollution hazard.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Characterization of Solid Ag/AgCl Reference Electrode with Different Electrolytes for Corrosion Monitoring of Steel in Concrete

Jin

Jiang

et al. 2016

Electrochemistry

Self Cite

View full text Add to dashboard Cite

Solid Ag/AgCl reference electrodes (RE) with different electrolytes were assembled and characterized in concrete. The performances have been studied with respect to known RE. And the corrosion states of steel have been investigated with respect to embedded and external REs by different electrochemical techniques. Results revealed that half-cell potential of 0.1, 1 and 4.18 M AgCl RE was 20 mV, −30.5 mV and −54.6 mV, respectively. In addition, 4.18 M AgCl RE exhibited the minimum potential drift, the smallest temperature coefficient value and the best reversibility. These corrosion parameters such as rebar potential, corrosion current density (I corr ) and charge transfer resistance (R ct ) obtained for steel with respect to these embedded AgCl REs could clearly differentiate the active condition of steel from the passive condition. Besides, I corr and R ct obtained for steel with respect to external SCE were usually 2 or 3 times larger than these embedded AgCl REs. In such cases embedded AgCl REs could accurately investigate the corrosion rate of steel in concrete. Moreover, the 4.18 M AgCl RE was recommended to monitor the corrosion condition of steel in concrete structure.

show abstract

“…A simulated concrete pore solution is frequently used to study the corrosion initiation of rebars for a short experimental period in spite of its limitations [32][33][34]. Carbonation tests show that the pH of uncarbonated concrete is in the range of 12.5 and 13.8 [13,[35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Pore Solution pH for the Corrosion Initiation of Rebars Embedded in Concrete under a Long-Term Natural Carbonation Reaction

Liu¹,

Niu²,

Li³

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

Featured Application: The work presented in this paper is suitable for application to the evaluation of existing reinforced concrete structures in buildings, brides, and tunnels.Abstract: This paper presents an in-situ inspection and experimental investigation on the pore solution pH of concrete cover for the corrosion initiation of rebars under a long-term natural carbonation reaction. A 77-year-old steel mill was inspected, and 35 concrete column cover samples were collected to test the pH of the pore solution and phase compositions layer by layer. The variation in pH and phase compositions of the concrete along the cover depth was studied. The in-situ inspection results indicate that the rebar embedded in concrete had begun to corrode when the carbonation depth was almost less than one-third of the cover depth. The corrosion initiation of rebars embedded in concrete can occur when the pH is between 11.3 and 12.1. The pore solution pH test results and X-ray diffraction (XRD) analysis indicated that there is a semi-carbonated zone between the fully carbonated zone and the rebar. The pH of a fully carbonated zone is in a range of 8.0-9.5, and the pH of a semi-carbonated zone is between 9.5 and 12.1.

show abstract

Influence of carbonation on chloride-induced reinforcement corrosion in simulated concrete pore solutions

Cited by 126 publications

References 29 publications

Study of surface morphology and inhibition efficiency of mild steel in simulated concrete pore solution by lactic acid–Zn2+ system

Study of surface morphology and inhibition efficiency of mild steel in simulated concrete pore solution by lactic acid–Zn2+ system

Electrochemical Characterization of Solid Ag/AgCl Reference Electrode with Different Electrolytes for Corrosion Monitoring of Steel in Concrete

Pore Solution pH for the Corrosion Initiation of Rebars Embedded in Concrete under a Long-Term Natural Carbonation Reaction

Contact Info

Product

Resources

About