Properties of Passive Films Formed on Ferrite-Martensite and Ferrite-Pearlite Steel Microstructures

A. Yilmaz; C. Ozkan; J. Sietsma; Y. Gonzalez Garcia

doi:10.3390/met11040594

Properties of Passive Films Formed on Ferrite-Martensite and Ferrite-Pearlite Steel Microstructures

A. Yilmaz, C. Ozkan, J. Sietsma, Y. Gonzalez Garcia

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Abstract

The effect of ferrite-pearlite and ferrite-martensite phase combinations on the passive layer properties of low carbon steel is investigated in a 0.1 M NaOH solution. Heat treatments were designed to obtain ferrite-pearlite and ferrite-martensite microstructures with similar ferrite volume fractions. Potentiostatic polarisation and electrochemical impedance spectroscopy (EIS) results demonstrated the lower barrier properties of passive films on ferrite-martensite microstructure compared to the ones formed on ferrite-pearlite microstructure. This was attributed to the higher donor density of the passive layer on ferrite-martensite samples, measured with Mott–Schottky analysis. This behaviour was explained by the complex microstructure morphology of the martensite phase that led to the formation of a more defective passive film

Original language	English
Article number	594
Number of pages	11
Journal	Metals
Volume	11
Issue number	4
DOIs	https://doi.org/10.3390/met11040594
Publication status	Published - 2021

Keywords

HSLA steel
dual-phase
passivity
EIS
polarisation
Mott–Schottky

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10.3390/met11040594

metals-11-00594Final published version, 1.54 MBLicence: CC BY

Cite this

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title = "Properties of Passive Films Formed on Ferrite-Martensite and Ferrite-Pearlite Steel Microstructures",

abstract = "The effect of ferrite-pearlite and ferrite-martensite phase combinations on the passive layer properties of low carbon steel is investigated in a 0.1 M NaOH solution. Heat treatments were designed to obtain ferrite-pearlite and ferrite-martensite microstructures with similar ferrite volume fractions. Potentiostatic polarisation and electrochemical impedance spectroscopy (EIS) results demonstrated the lower barrier properties of passive films on ferrite-martensite microstructure compared to the ones formed on ferrite-pearlite microstructure. This was attributed to the higher donor density of the passive layer on ferrite-martensite samples, measured with Mott–Schottky analysis. This behaviour was explained by the complex microstructure morphology of the martensite phase that led to the formation of a more defective passive film",

keywords = "HSLA steel, dual-phase, passivity, EIS, polarisation, Mott–Schottky",

author = "A. Yilmaz and C. Ozkan and J. Sietsma and {Gonzalez Garcia}, Y.",

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doi = "10.3390/met11040594",

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journal = "Metals",

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TY - JOUR

T1 - Properties of Passive Films Formed on Ferrite-Martensite and Ferrite-Pearlite Steel Microstructures

AU - Yilmaz, A.

AU - Ozkan, C.

AU - Sietsma, J.

AU - Gonzalez Garcia, Y.

PY - 2021

Y1 - 2021

N2 - The effect of ferrite-pearlite and ferrite-martensite phase combinations on the passive layer properties of low carbon steel is investigated in a 0.1 M NaOH solution. Heat treatments were designed to obtain ferrite-pearlite and ferrite-martensite microstructures with similar ferrite volume fractions. Potentiostatic polarisation and electrochemical impedance spectroscopy (EIS) results demonstrated the lower barrier properties of passive films on ferrite-martensite microstructure compared to the ones formed on ferrite-pearlite microstructure. This was attributed to the higher donor density of the passive layer on ferrite-martensite samples, measured with Mott–Schottky analysis. This behaviour was explained by the complex microstructure morphology of the martensite phase that led to the formation of a more defective passive film

AB - The effect of ferrite-pearlite and ferrite-martensite phase combinations on the passive layer properties of low carbon steel is investigated in a 0.1 M NaOH solution. Heat treatments were designed to obtain ferrite-pearlite and ferrite-martensite microstructures with similar ferrite volume fractions. Potentiostatic polarisation and electrochemical impedance spectroscopy (EIS) results demonstrated the lower barrier properties of passive films on ferrite-martensite microstructure compared to the ones formed on ferrite-pearlite microstructure. This was attributed to the higher donor density of the passive layer on ferrite-martensite samples, measured with Mott–Schottky analysis. This behaviour was explained by the complex microstructure morphology of the martensite phase that led to the formation of a more defective passive film

KW - HSLA steel

KW - dual-phase

KW - passivity

KW - EIS

KW - polarisation

KW - Mott–Schottky

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U2 - 10.3390/met11040594

DO - 10.3390/met11040594

M3 - Article

SN - 2075-4701

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JO - Metals

JF - Metals

IS - 4

M1 - 594

ER -

Properties of Passive Films Formed on Ferrite-Martensite and Ferrite-Pearlite Steel Microstructures

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