Corrosion of simulated weld HAZ of API X-80 pipeline steel

Farzad Mohammadi; Faysal Fayez Eliyan; Akram Alfantazi

doi:10.1016/j.corsci.2012.06.014

Corrosion of simulated weld HAZ of API X-80 pipeline steel

Farzad Mohammadi, Faysal Fayez Eliyan, Akram Alfantazi

Chemical and Petroleum Engineering

The University of British Columbia

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

141 Scopus citations

Abstract

Four peak temperatures and two cooling rates were used in a Gleeble thermomechanical processing machine to simulate weld HAZ of API X-80 pipeline steel. Bainitic microstructures were observed at both 30 and 100 °C/s cooling rates. Bainite favoured higher passive current densities in alkaline solutions. The lowest peak temperature, 770 °C, produced the highest martensite-retained austenite (M-A) phase in the microstructure. Presence of M-A phases in the microstructure extended the passive region to higher potentials in alkaline solutions. Corrosion current density of the as-received sample was higher in acidic solutions and lower in alkaline solutions compared to the heat-treated ones.

Original language	British English
Pages (from-to)	323-333
Number of pages	11
Journal	Corrosion Science
Volume	63
DOIs	https://doi.org/10.1016/j.corsci.2012.06.014
State	Published - Oct 2012

Keywords

A. Low alloy steel
B. Polarisation
C. Acid corrosion
C. Alkaline corrosion
C. Welding

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10.1016/j.corsci.2012.06.014

Cite this

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title = "Corrosion of simulated weld HAZ of API X-80 pipeline steel",

abstract = "Four peak temperatures and two cooling rates were used in a Gleeble thermomechanical processing machine to simulate weld HAZ of API X-80 pipeline steel. Bainitic microstructures were observed at both 30 and 100 °C/s cooling rates. Bainite favoured higher passive current densities in alkaline solutions. The lowest peak temperature, 770 °C, produced the highest martensite-retained austenite (M-A) phase in the microstructure. Presence of M-A phases in the microstructure extended the passive region to higher potentials in alkaline solutions. Corrosion current density of the as-received sample was higher in acidic solutions and lower in alkaline solutions compared to the heat-treated ones.",

keywords = "A. Low alloy steel, B. Polarisation, C. Acid corrosion, C. Alkaline corrosion, C. Welding",

author = "Farzad Mohammadi and Eliyan, {Faysal Fayez} and Akram Alfantazi",

note = "Funding Information: Authors would like to thank Natural Sciences and Engineering Research Council (NSERC) of Canada and Qatar National Research Fund (QNRF) for providing the financial support for this project.",

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doi = "10.1016/j.corsci.2012.06.014",

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volume = "63",

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journal = "Corrosion Science",

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T1 - Corrosion of simulated weld HAZ of API X-80 pipeline steel

AU - Mohammadi, Farzad

AU - Eliyan, Faysal Fayez

AU - Alfantazi, Akram

N1 - Funding Information: Authors would like to thank Natural Sciences and Engineering Research Council (NSERC) of Canada and Qatar National Research Fund (QNRF) for providing the financial support for this project.

PY - 2012/10

Y1 - 2012/10

N2 - Four peak temperatures and two cooling rates were used in a Gleeble thermomechanical processing machine to simulate weld HAZ of API X-80 pipeline steel. Bainitic microstructures were observed at both 30 and 100 °C/s cooling rates. Bainite favoured higher passive current densities in alkaline solutions. The lowest peak temperature, 770 °C, produced the highest martensite-retained austenite (M-A) phase in the microstructure. Presence of M-A phases in the microstructure extended the passive region to higher potentials in alkaline solutions. Corrosion current density of the as-received sample was higher in acidic solutions and lower in alkaline solutions compared to the heat-treated ones.

AB - Four peak temperatures and two cooling rates were used in a Gleeble thermomechanical processing machine to simulate weld HAZ of API X-80 pipeline steel. Bainitic microstructures were observed at both 30 and 100 °C/s cooling rates. Bainite favoured higher passive current densities in alkaline solutions. The lowest peak temperature, 770 °C, produced the highest martensite-retained austenite (M-A) phase in the microstructure. Presence of M-A phases in the microstructure extended the passive region to higher potentials in alkaline solutions. Corrosion current density of the as-received sample was higher in acidic solutions and lower in alkaline solutions compared to the heat-treated ones.

KW - A. Low alloy steel

KW - B. Polarisation

KW - C. Acid corrosion

KW - C. Alkaline corrosion

KW - C. Welding

UR - http://www.scopus.com/inward/record.url?scp=84864308378&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2012.06.014

DO - 10.1016/j.corsci.2012.06.014

M3 - Article

AN - SCOPUS:84864308378

SN - 0010-938X

VL - 63

SP - 323

EP - 333

JO - Corrosion Science

JF - Corrosion Science

ER -

Corrosion of simulated weld HAZ of API X-80 pipeline steel

Abstract

Keywords

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