Mass transfer analysis considering gas phase diffusion and experimental verification for surface painting a waterborne MCI in concrete

X. Wang, Z. Liu (Corresponding author), Zixiao Wang, N. Song

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The mass transfer numerical model including the long-term gas phase diffusion of a waterborne migrating corrosion inhibitor (MCI, named PCI-2016) in concrete was investigated in this study. The PCI-2016 was prepared by using multi-compound and chelate-induced techniques. The concentrations of nitrogen in different thickness of cover concrete after surface-painted different amounts of PCI-2016 were calculated by this mass transfer model. The calculated data were basically consistent with the nitrogen contents tested by Kjeldahl method at interface between steel bar and mortar matrix. To verify the anticorrosion performance of painting PCI-2016 steel bars bedded in mortar specimens containing different content of NaCl painted with relevant amounts of PCI-2016 were also investigated by the linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). The results revealed that the I corr of steel bar in the specimen containing 1.25% NaCl (wt. to cement) after painting with 5 g PCI-2016 for 3 days and 28 days decreased from 0.67 μA·cm –2 (before painting) to 0.25 μA·cm –2 and 0.06 μA·cm –2 , respectively. The numerical analysis and test results supported that the gas phase transfer model is suitable to calculate the weight of PCI-2016 at the interface zone between steel bar and concrete, and the painted the certain amounts of PCI-2016 on the surface of mortar could show an identified repairing effect on the corrosive steel bar.

LanguageEnglish
Pages13-24
Number of pages12
JournalInternational Journal of Corrosion and Scale Inhibition
Volume8
Issue number1
DOIs
StatePublished - 2019

Fingerprint

Gas fuel analysis
Steel
Painting
Mass transfer
Concretes
Mortar
Nitrogen
Gases
Caustics
Corrosion inhibitors
Electrochemical impedance spectroscopy
Numerical analysis
Numerical models
Cements
Polarization

Keywords

  • Anticorrosion performance
  • Gas phase transfer model
  • Mass transfer
  • Migrating corrosion inhibitor
  • Nitrogen content

Cite this

@article{29e9a10a658546bdb6dc6545d20ac279,
title = "Mass transfer analysis considering gas phase diffusion and experimental verification for surface painting a waterborne MCI in concrete",
abstract = "The mass transfer numerical model including the long-term gas phase diffusion of a waterborne migrating corrosion inhibitor (MCI, named PCI-2016) in concrete was investigated in this study. The PCI-2016 was prepared by using multi-compound and chelate-induced techniques. The concentrations of nitrogen in different thickness of cover concrete after surface-painted different amounts of PCI-2016 were calculated by this mass transfer model. The calculated data were basically consistent with the nitrogen contents tested by Kjeldahl method at interface between steel bar and mortar matrix. To verify the anticorrosion performance of painting PCI-2016 steel bars bedded in mortar specimens containing different content of NaCl painted with relevant amounts of PCI-2016 were also investigated by the linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). The results revealed that the I corr of steel bar in the specimen containing 1.25{\%} NaCl (wt. to cement) after painting with 5 g PCI-2016 for 3 days and 28 days decreased from 0.67 μA·cm –2 (before painting) to 0.25 μA·cm –2 and 0.06 μA·cm –2 , respectively. The numerical analysis and test results supported that the gas phase transfer model is suitable to calculate the weight of PCI-2016 at the interface zone between steel bar and concrete, and the painted the certain amounts of PCI-2016 on the surface of mortar could show an identified repairing effect on the corrosive steel bar.",
keywords = "Anticorrosion performance, Gas phase transfer model, Mass transfer, Migrating corrosion inhibitor, Nitrogen content",
author = "X. Wang and Z. Liu and Zixiao Wang and N. Song",
year = "2019",
doi = "10.17675/2305-6894-2019-8-1-2",
language = "English",
volume = "8",
pages = "13--24",
journal = "International Journal of Corrosion and Scale Inhibition",
issn = "2305-6894",
publisher = "Russian Association of Corrosion Engineers",
number = "1",

}

Mass transfer analysis considering gas phase diffusion and experimental verification for surface painting a waterborne MCI in concrete. / Wang, X.; Liu, Z. (Corresponding author); Wang, Zixiao; Song, N.

In: International Journal of Corrosion and Scale Inhibition, Vol. 8, No. 1, 2019, p. 13-24.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Mass transfer analysis considering gas phase diffusion and experimental verification for surface painting a waterborne MCI in concrete

AU - Wang,X.

AU - Liu,Z.

AU - Wang,Zixiao

AU - Song,N.

PY - 2019

Y1 - 2019

N2 - The mass transfer numerical model including the long-term gas phase diffusion of a waterborne migrating corrosion inhibitor (MCI, named PCI-2016) in concrete was investigated in this study. The PCI-2016 was prepared by using multi-compound and chelate-induced techniques. The concentrations of nitrogen in different thickness of cover concrete after surface-painted different amounts of PCI-2016 were calculated by this mass transfer model. The calculated data were basically consistent with the nitrogen contents tested by Kjeldahl method at interface between steel bar and mortar matrix. To verify the anticorrosion performance of painting PCI-2016 steel bars bedded in mortar specimens containing different content of NaCl painted with relevant amounts of PCI-2016 were also investigated by the linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). The results revealed that the I corr of steel bar in the specimen containing 1.25% NaCl (wt. to cement) after painting with 5 g PCI-2016 for 3 days and 28 days decreased from 0.67 μA·cm –2 (before painting) to 0.25 μA·cm –2 and 0.06 μA·cm –2 , respectively. The numerical analysis and test results supported that the gas phase transfer model is suitable to calculate the weight of PCI-2016 at the interface zone between steel bar and concrete, and the painted the certain amounts of PCI-2016 on the surface of mortar could show an identified repairing effect on the corrosive steel bar.

AB - The mass transfer numerical model including the long-term gas phase diffusion of a waterborne migrating corrosion inhibitor (MCI, named PCI-2016) in concrete was investigated in this study. The PCI-2016 was prepared by using multi-compound and chelate-induced techniques. The concentrations of nitrogen in different thickness of cover concrete after surface-painted different amounts of PCI-2016 were calculated by this mass transfer model. The calculated data were basically consistent with the nitrogen contents tested by Kjeldahl method at interface between steel bar and mortar matrix. To verify the anticorrosion performance of painting PCI-2016 steel bars bedded in mortar specimens containing different content of NaCl painted with relevant amounts of PCI-2016 were also investigated by the linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). The results revealed that the I corr of steel bar in the specimen containing 1.25% NaCl (wt. to cement) after painting with 5 g PCI-2016 for 3 days and 28 days decreased from 0.67 μA·cm –2 (before painting) to 0.25 μA·cm –2 and 0.06 μA·cm –2 , respectively. The numerical analysis and test results supported that the gas phase transfer model is suitable to calculate the weight of PCI-2016 at the interface zone between steel bar and concrete, and the painted the certain amounts of PCI-2016 on the surface of mortar could show an identified repairing effect on the corrosive steel bar.

KW - Anticorrosion performance

KW - Gas phase transfer model

KW - Mass transfer

KW - Migrating corrosion inhibitor

KW - Nitrogen content

UR - http://www.scopus.com/inward/record.url?scp=85062495275&partnerID=8YFLogxK

U2 - 10.17675/2305-6894-2019-8-1-2

DO - 10.17675/2305-6894-2019-8-1-2

M3 - Article

VL - 8

SP - 13

EP - 24

JO - International Journal of Corrosion and Scale Inhibition

T2 - International Journal of Corrosion and Scale Inhibition

JF - International Journal of Corrosion and Scale Inhibition

SN - 2305-6894

IS - 1

ER -