Molten salt induced corrosion of Inconel 625 superalloy in PbSO 4-Pb 3O 4-PbCl 2-Fe 2O 3-ZnO environment

E. Mohammadi Zahrani; A. M. Alfantazi

doi:10.1016/j.corsci.2012.08.035

Molten salt induced corrosion of Inconel 625 superalloy in PbSO ₄-Pb ₃O ₄-PbCl ₂-Fe ₂O ₃-ZnO environment

E. Mohammadi Zahrani, A. M. Alfantazi

Chemical and Petroleum Engineering

The University of British Columbia

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

68 Scopus citations

Abstract

Corrosion behavior of alloy 625 was studied in a molten salt consisting of 47PbSO ₄-23 ZnO-13 Pb ₃O ₄-10Fe ₂O ₃-7PbCl ₂ (wt.%) under air atmosphere at 600, 700 and 800°C, utilizing OCP, potentiodynamic polarization, EIS and weight-loss measurement techniques. Phase structure, morphology and chemical analysis of corrosion products and scales were characterized by means of XRD, SEM/EDX, and ICP/AAS.General surface corrosion, intergranular corrosion, formation of voids and, a network of distributed pores on surface and cross-section, plus internal oxidation and sulfidation were identified as different modes of corrosion attack. EIS data fit to a porous and non-protective barrier layer electrochemical model.

Original language	British English
Pages (from-to)	340-359
Number of pages	20
Journal	Corrosion Science
Volume	65
DOIs	https://doi.org/10.1016/j.corsci.2012.08.035
State	Published - Dec 2012

Keywords

A. Molten salt
A. Superalloys
B. EIS
B. XRD
C. High temperature corrosion
C. Oxidation

Access to Document

10.1016/j.corsci.2012.08.035

Cite this

@article{c4578f05bdb24aaab04e38146db2bd75,

title = "Molten salt induced corrosion of Inconel 625 superalloy in PbSO 4-Pb 3O 4-PbCl 2-Fe 2O 3-ZnO environment",

abstract = "Corrosion behavior of alloy 625 was studied in a molten salt consisting of 47PbSO 4-23 ZnO-13 Pb 3O 4-10Fe 2O 3-7PbCl 2 (wt.%) under air atmosphere at 600, 700 and 800°C, utilizing OCP, potentiodynamic polarization, EIS and weight-loss measurement techniques. Phase structure, morphology and chemical analysis of corrosion products and scales were characterized by means of XRD, SEM/EDX, and ICP/AAS.General surface corrosion, intergranular corrosion, formation of voids and, a network of distributed pores on surface and cross-section, plus internal oxidation and sulfidation were identified as different modes of corrosion attack. EIS data fit to a porous and non-protective barrier layer electrochemical model.",

keywords = "A. Molten salt, A. Superalloys, B. EIS, B. XRD, C. High temperature corrosion, C. Oxidation",

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

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

year = "2012",

month = dec,

doi = "10.1016/j.corsci.2012.08.035",

language = "British English",

volume = "65",

pages = "340--359",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Molten salt induced corrosion of Inconel 625 superalloy in PbSO 4-Pb 3O 4-PbCl 2-Fe 2O 3-ZnO environment

AU - Mohammadi Zahrani, E.

AU - Alfantazi, A. M.

N1 - Funding Information: Financial support from Natural Sciences and Engineering Research Council of Canada (NSERC) and Teck Metals Ltd. is gratefully acknowledged. Also, the first author (Ehsan Mohammadi Zahrani) would like to express his gratitude towards the NSERC for providing prestigious Vanier Canada Graduate Scholarship and the University of British Columbia (UBC) for providing the Killam Doctoral Fellowship and Four Years Doctoral Fellowship for him.

PY - 2012/12

Y1 - 2012/12

N2 - Corrosion behavior of alloy 625 was studied in a molten salt consisting of 47PbSO 4-23 ZnO-13 Pb 3O 4-10Fe 2O 3-7PbCl 2 (wt.%) under air atmosphere at 600, 700 and 800°C, utilizing OCP, potentiodynamic polarization, EIS and weight-loss measurement techniques. Phase structure, morphology and chemical analysis of corrosion products and scales were characterized by means of XRD, SEM/EDX, and ICP/AAS.General surface corrosion, intergranular corrosion, formation of voids and, a network of distributed pores on surface and cross-section, plus internal oxidation and sulfidation were identified as different modes of corrosion attack. EIS data fit to a porous and non-protective barrier layer electrochemical model.

AB - Corrosion behavior of alloy 625 was studied in a molten salt consisting of 47PbSO 4-23 ZnO-13 Pb 3O 4-10Fe 2O 3-7PbCl 2 (wt.%) under air atmosphere at 600, 700 and 800°C, utilizing OCP, potentiodynamic polarization, EIS and weight-loss measurement techniques. Phase structure, morphology and chemical analysis of corrosion products and scales were characterized by means of XRD, SEM/EDX, and ICP/AAS.General surface corrosion, intergranular corrosion, formation of voids and, a network of distributed pores on surface and cross-section, plus internal oxidation and sulfidation were identified as different modes of corrosion attack. EIS data fit to a porous and non-protective barrier layer electrochemical model.

KW - A. Molten salt

KW - A. Superalloys

KW - B. EIS

KW - B. XRD

KW - C. High temperature corrosion

KW - C. Oxidation

UR - http://www.scopus.com/inward/record.url?scp=84867231757&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2012.08.035

DO - 10.1016/j.corsci.2012.08.035

M3 - Article

AN - SCOPUS:84867231757

SN - 0010-938X

VL - 65

SP - 340

EP - 359

JO - Corrosion Science

JF - Corrosion Science

ER -

Molten salt induced corrosion of Inconel 625 superalloy in PbSO ₄-Pb ₃O ₄-PbCl ₂-Fe ₂O ₃-ZnO environment

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this