High temperature corrosion and electrochemical behavior of INCONEL 625 weld overlay in PbSO4-Pb3O4-PbCl2-CdO-ZnO molten salt medium

E. Mohammadi Zahrani; A. M. Alfantazi

doi:10.1016/j.corsci.2014.03.034

High temperature corrosion and electrochemical behavior of INCONEL 625 weld overlay in PbSO₄-Pb₃O₄-PbCl₂-CdO-ZnO molten salt medium

E. Mohammadi Zahrani
, A. M. Alfantazi

Chemical and Petroleum Engineering

The University of British Columbia

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

72 Scopus citations

Abstract

Molten salt-induced corrosion, electrochemical behavior, and degradation mechanisms of the alloy Inconel 625 weld overlay, deposited on the surface of the carbon steel through an automatic gas metal arc welding (GMAW) process, were investigated. OCP, EIS, potentiodynamic polarization, weight-loss measurement, SEM/EDX, XRD, DTA, and ICP/AAS techniques were utilized to study the electrochemical and corrosion behavior of the weld overlay alloy 625 exposed to a molten salt medium containing 47 PbSO₄-23 ZnO-13 Pb₃O₄-10 CdO-7 PbCl₂ (wt.%) at 600, 700, and 800°C for 24h. EIS data fit well into an equivalent circuit representing a two porous/non-protective scales model.

Original language	British English
Pages (from-to)	60-76
Number of pages	17
Journal	Corrosion Science
Volume	85
DOIs	https://doi.org/10.1016/j.corsci.2014.03.034
State	Published - Aug 2014

Keywords

A. Molten salts
A. Superalloys
B. EIS
B. SEM
C. High temperature corrosion
C. Welding

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10.1016/j.corsci.2014.03.034

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@article{968ae84401824fab92be8fe808167239,

title = "High temperature corrosion and electrochemical behavior of INCONEL 625 weld overlay in PbSO4-Pb3O4-PbCl2-CdO-ZnO molten salt medium",

abstract = "Molten salt-induced corrosion, electrochemical behavior, and degradation mechanisms of the alloy Inconel 625 weld overlay, deposited on the surface of the carbon steel through an automatic gas metal arc welding (GMAW) process, were investigated. OCP, EIS, potentiodynamic polarization, weight-loss measurement, SEM/EDX, XRD, DTA, and ICP/AAS techniques were utilized to study the electrochemical and corrosion behavior of the weld overlay alloy 625 exposed to a molten salt medium containing 47 PbSO4-23 ZnO-13 Pb3O4-10 CdO-7 PbCl2 (wt.\%) at 600, 700, and 800°C for 24h. EIS data fit well into an equivalent circuit representing a two porous/non-protective scales model.",

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author = "\{Mohammadi Zahrani\}, E. and Alfantazi, \{A. M.\}",

note = "Funding Information: Financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) and Teck Metals Ltd. is gratefully acknowledged. Furthermore, the first author (Ehsan Mohammadi Zahrani) would like to express his gratitude toward NSERC for providing the prestigious Vanier Canada Graduate Scholarship, the University of British Columbia (UBC) for providing the Killam Doctoral Fellowship plus the Four Years Doctoral Fellowship, and the Metallurgy and Materials Society of the Canadian Institute of Mining, Metallurgy, and Petroleum (MetSoc of CIM) for providing the MetSoc Doctoral Scholarship to him. ",

year = "2014",

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doi = "10.1016/j.corsci.2014.03.034",

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journal = "Corrosion Science",

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AU - Alfantazi, A. M.

N1 - Funding Information: Financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) and Teck Metals Ltd. is gratefully acknowledged. Furthermore, the first author (Ehsan Mohammadi Zahrani) would like to express his gratitude toward NSERC for providing the prestigious Vanier Canada Graduate Scholarship, the University of British Columbia (UBC) for providing the Killam Doctoral Fellowship plus the Four Years Doctoral Fellowship, and the Metallurgy and Materials Society of the Canadian Institute of Mining, Metallurgy, and Petroleum (MetSoc of CIM) for providing the MetSoc Doctoral Scholarship to him.

PY - 2014/8

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N2 - Molten salt-induced corrosion, electrochemical behavior, and degradation mechanisms of the alloy Inconel 625 weld overlay, deposited on the surface of the carbon steel through an automatic gas metal arc welding (GMAW) process, were investigated. OCP, EIS, potentiodynamic polarization, weight-loss measurement, SEM/EDX, XRD, DTA, and ICP/AAS techniques were utilized to study the electrochemical and corrosion behavior of the weld overlay alloy 625 exposed to a molten salt medium containing 47 PbSO4-23 ZnO-13 Pb3O4-10 CdO-7 PbCl2 (wt.%) at 600, 700, and 800°C for 24h. EIS data fit well into an equivalent circuit representing a two porous/non-protective scales model.

AB - Molten salt-induced corrosion, electrochemical behavior, and degradation mechanisms of the alloy Inconel 625 weld overlay, deposited on the surface of the carbon steel through an automatic gas metal arc welding (GMAW) process, were investigated. OCP, EIS, potentiodynamic polarization, weight-loss measurement, SEM/EDX, XRD, DTA, and ICP/AAS techniques were utilized to study the electrochemical and corrosion behavior of the weld overlay alloy 625 exposed to a molten salt medium containing 47 PbSO4-23 ZnO-13 Pb3O4-10 CdO-7 PbCl2 (wt.%) at 600, 700, and 800°C for 24h. EIS data fit well into an equivalent circuit representing a two porous/non-protective scales model.

KW - A. Molten salts

KW - A. Superalloys

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KW - B. SEM

KW - C. High temperature corrosion

KW - C. Welding

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