Corrosion of a Spark Plasma Sintered Fe-Cr-Mo-B-C Alloy in Hydrochloric Acid

Ahmad A. Sorour; Mudassir Farooq; Abdelkrim Mekki; A. Madhan Kumar

doi:10.1007/s13632-021-00739-5

Corrosion of a Spark Plasma Sintered Fe-Cr-Mo-B-C Alloy in Hydrochloric Acid

Ahmad A. Sorour^*, Mudassir Farooq, Abdelkrim Mekki, A. Madhan Kumar

^*Corresponding author for this work

Research output: Contribution to journal › Review article › peer-review

5 Scopus citations

Abstract

This research studied the electrochemical corrosion behavior in 1 M hydrochloric acid of a Fe-Cr-Mo-B-C alloy fabricated using spark plasma sintering of an amorphous alloy starting powder. The corrosion performance was evaluated using electrochemical impedance spectroscopy and potentiodynamic polarization tests and was benchmarked with conventional materials: 316L stainless steel and 1080 carbon steel. The corrosion reaction products on the surface were characterized using X-ray photoelectron spectroscopy, scanning electron microscopy and energy-dispersive spectroscopy. The specimen sintered at 800 °C had approximately 94% densification, whereas the specimen sintered at 900 °C exhibited greater densification of approximately 98%. The sintered specimens consisted of nanocrystalline (Fe,Cr)₂₃C₆ and (Cr,Fe)₂B particles embedded in a body-centered-cubic Fe-based matrix. These sintered specimens exhibited better corrosion resistance than conventional alloys. When the density of the sintered alloy decreased from 98 to 94%, resistance to chloride attack was increased because of the formation of a thicker and more uniform surface product as well as a chromium-containing oxide layer.

Original language	English
Pages (from-to)	291-301
Number of pages	11
Journal	Metallography, Microstructure, and Analysis
Volume	10
Issue number	3
DOIs	https://doi.org/10.1007/s13632-021-00739-5
State	Published - Jun 2021

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Publisher Copyright:
© 2021, ASM International.

Keywords

Corrosion
Metal matrix Composite
Microstructure
Powder metallurgy

ASJC Scopus subject areas

Metals and Alloys

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10.1007/s13632-021-00739-5

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title = "Corrosion of a Spark Plasma Sintered Fe-Cr-Mo-B-C Alloy in Hydrochloric Acid",

abstract = "This research studied the electrochemical corrosion behavior in 1 M hydrochloric acid of a Fe-Cr-Mo-B-C alloy fabricated using spark plasma sintering of an amorphous alloy starting powder. The corrosion performance was evaluated using electrochemical impedance spectroscopy and potentiodynamic polarization tests and was benchmarked with conventional materials: 316L stainless steel and 1080 carbon steel. The corrosion reaction products on the surface were characterized using X-ray photoelectron spectroscopy, scanning electron microscopy and energy-dispersive spectroscopy. The specimen sintered at 800 °C had approximately 94% densification, whereas the specimen sintered at 900 °C exhibited greater densification of approximately 98%. The sintered specimens consisted of nanocrystalline (Fe,Cr)23C6 and (Cr,Fe)2B particles embedded in a body-centered-cubic Fe-based matrix. These sintered specimens exhibited better corrosion resistance than conventional alloys. When the density of the sintered alloy decreased from 98 to 94%, resistance to chloride attack was increased because of the formation of a thicker and more uniform surface product as well as a chromium-containing oxide layer.",

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author = "Sorour, {Ahmad A.} and Mudassir Farooq and Abdelkrim Mekki and Kumar, {A. Madhan}",

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AU - Sorour, Ahmad A.

AU - Farooq, Mudassir

AU - Mekki, Abdelkrim

AU - Kumar, A. Madhan

PY - 2021/6

Y1 - 2021/6

N2 - This research studied the electrochemical corrosion behavior in 1 M hydrochloric acid of a Fe-Cr-Mo-B-C alloy fabricated using spark plasma sintering of an amorphous alloy starting powder. The corrosion performance was evaluated using electrochemical impedance spectroscopy and potentiodynamic polarization tests and was benchmarked with conventional materials: 316L stainless steel and 1080 carbon steel. The corrosion reaction products on the surface were characterized using X-ray photoelectron spectroscopy, scanning electron microscopy and energy-dispersive spectroscopy. The specimen sintered at 800 °C had approximately 94% densification, whereas the specimen sintered at 900 °C exhibited greater densification of approximately 98%. The sintered specimens consisted of nanocrystalline (Fe,Cr)23C6 and (Cr,Fe)2B particles embedded in a body-centered-cubic Fe-based matrix. These sintered specimens exhibited better corrosion resistance than conventional alloys. When the density of the sintered alloy decreased from 98 to 94%, resistance to chloride attack was increased because of the formation of a thicker and more uniform surface product as well as a chromium-containing oxide layer.

AB - This research studied the electrochemical corrosion behavior in 1 M hydrochloric acid of a Fe-Cr-Mo-B-C alloy fabricated using spark plasma sintering of an amorphous alloy starting powder. The corrosion performance was evaluated using electrochemical impedance spectroscopy and potentiodynamic polarization tests and was benchmarked with conventional materials: 316L stainless steel and 1080 carbon steel. The corrosion reaction products on the surface were characterized using X-ray photoelectron spectroscopy, scanning electron microscopy and energy-dispersive spectroscopy. The specimen sintered at 800 °C had approximately 94% densification, whereas the specimen sintered at 900 °C exhibited greater densification of approximately 98%. The sintered specimens consisted of nanocrystalline (Fe,Cr)23C6 and (Cr,Fe)2B particles embedded in a body-centered-cubic Fe-based matrix. These sintered specimens exhibited better corrosion resistance than conventional alloys. When the density of the sintered alloy decreased from 98 to 94%, resistance to chloride attack was increased because of the formation of a thicker and more uniform surface product as well as a chromium-containing oxide layer.

KW - Corrosion

KW - Metal matrix Composite

KW - Microstructure

KW - Powder metallurgy

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DO - 10.1007/s13632-021-00739-5

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SN - 2192-9262

VL - 10

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JF - Metallography, Microstructure, and Analysis

IS - 3

ER -

Corrosion of a Spark Plasma Sintered Fe-Cr-Mo-B-C Alloy in Hydrochloric Acid

Abstract

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Keywords

ASJC Scopus subject areas

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