Effect of microstructural defects on passive layer properties of interstitial free (IF) ferritic steels in alkaline environment

A. Yilmaz; K. Traka; S. Pletincx; T. Hauffman; J. Sietsma; Y. Gonzalez-Garcia

doi:10.1016/j.corsci.2021.109271

Effect of microstructural defects on passive layer properties of interstitial free (IF) ferritic steels in alkaline environment

A. Yilmaz, K. Traka, S. Pletincx, T. Hauffman, J. Sietsma, Y. Gonzalez-Garcia^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

The role of microstructural defects (dislocation density and grain boundary areas) on the passive film properties formed on cold- and hot-rolled interstitial free (IF) steels is investigated in 0.1 M NaOH solution. Electron backscattered diffraction (EBSD) shows higher microstructural defect density on cold-rolled samples. Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) results exhibit the lower barrier properties of passive films with the increase in microstructural defects. This is attributed to the increase in donor density measured with Mott-Schottky analysis and the lower relative quantity of protective γ-Fe₂O₃ in passive films (composed of Fe₃O₄,γ-Fe₂O₃ and FeO(OH)) with the increase in microstructural defect density.

Original language	English
Article number	109271
Number of pages	9
Journal	Corrosion Science
Volume	182
DOIs	https://doi.org/10.1016/j.corsci.2021.109271
Publication status	Published - 2021

Keywords

EIS
Ferritic steel
Microstructural defect density
Mott-Schottky analysis
Passivity
SKP
XPS

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10.1016/j.corsci.2021.109271

1-s2.0-S0010938X21000378-mainFinal published version, 4.87 MBLicence: CC BY

Cite this

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title = "Effect of microstructural defects on passive layer properties of interstitial free (IF) ferritic steels in alkaline environment",

abstract = "The role of microstructural defects (dislocation density and grain boundary areas) on the passive film properties formed on cold- and hot-rolled interstitial free (IF) steels is investigated in 0.1 M NaOH solution. Electron backscattered diffraction (EBSD) shows higher microstructural defect density on cold-rolled samples. Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) results exhibit the lower barrier properties of passive films with the increase in microstructural defects. This is attributed to the increase in donor density measured with Mott-Schottky analysis and the lower relative quantity of protective γ-Fe2O3 in passive films (composed of Fe3O4,γ-Fe2O3 and FeO(OH)) with the increase in microstructural defect density.",

keywords = "EIS, Ferritic steel, Microstructural defect density, Mott-Schottky analysis, Passivity, SKP, XPS",

author = "A. Yilmaz and K. Traka and S. Pletincx and T. Hauffman and J. Sietsma and Y. Gonzalez-Garcia",

year = "2021",

doi = "10.1016/j.corsci.2021.109271",

language = "English",

volume = "182",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of microstructural defects on passive layer properties of interstitial free (IF) ferritic steels in alkaline environment

AU - Yilmaz, A.

AU - Traka, K.

AU - Pletincx, S.

AU - Hauffman, T.

AU - Sietsma, J.

AU - Gonzalez-Garcia, Y.

PY - 2021

Y1 - 2021

N2 - The role of microstructural defects (dislocation density and grain boundary areas) on the passive film properties formed on cold- and hot-rolled interstitial free (IF) steels is investigated in 0.1 M NaOH solution. Electron backscattered diffraction (EBSD) shows higher microstructural defect density on cold-rolled samples. Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) results exhibit the lower barrier properties of passive films with the increase in microstructural defects. This is attributed to the increase in donor density measured with Mott-Schottky analysis and the lower relative quantity of protective γ-Fe2O3 in passive films (composed of Fe3O4,γ-Fe2O3 and FeO(OH)) with the increase in microstructural defect density.

AB - The role of microstructural defects (dislocation density and grain boundary areas) on the passive film properties formed on cold- and hot-rolled interstitial free (IF) steels is investigated in 0.1 M NaOH solution. Electron backscattered diffraction (EBSD) shows higher microstructural defect density on cold-rolled samples. Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) results exhibit the lower barrier properties of passive films with the increase in microstructural defects. This is attributed to the increase in donor density measured with Mott-Schottky analysis and the lower relative quantity of protective γ-Fe2O3 in passive films (composed of Fe3O4,γ-Fe2O3 and FeO(OH)) with the increase in microstructural defect density.

KW - EIS

KW - Ferritic steel

KW - Microstructural defect density

KW - Mott-Schottky analysis

KW - Passivity

KW - SKP

KW - XPS

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U2 - 10.1016/j.corsci.2021.109271

DO - 10.1016/j.corsci.2021.109271

M3 - Article

AN - SCOPUS:85099864965

SN - 0010-938X

VL - 182

JO - Corrosion Science

JF - Corrosion Science

M1 - 109271

ER -

Effect of microstructural defects on passive layer properties of interstitial free (IF) ferritic steels in alkaline environment

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Keywords

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