Sensitization of as rolled and stable annealed Alloy 625

Roland Lackner; G Mori; R. Egger; F. Winter; Mihaela Albu; Werner Grogger

doi:10.1007/s00501-013-0225-x

Sensitization of as rolled and stable annealed Alloy 625

Roland Lackner^*, G Mori, R. Egger, F. Winter, Mihaela Albu, Werner Grogger

^*Corresponding author for this work

Institute of Electron Microscopy and Nanoanalysis (5190)

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

Abstract

Alloy 625 is used as cladding material in the oil and gas industry. Different annealing conditions are used, these are stable annealed and as rolled. Both conditions have been isothermally sensitized in a laboratory resistance furnace. The annealing temperature was up to 1050 °C and the annealing time up to 10 h. Susceptibility to intergranular corrosion has been investigated by means of a conventional immersion tests according to ASTM G28A and the Double Loop—Electrochemical Potentiokinetic Reactivation Test (DL-EPR method). Scanning electron microscopy (SEM) was used to evaluate microstructure and type of attack after testing. The chemical composition of precipitated phases was characterized by SEM and Transmission Electron Microscopy (TEM). High-resolution investigations with concentration profiles proved high molybdenum precipitates to determine the degree of sensitization.

Translated title of the contribution	Sensibilisierung von walzharten und stabil geglühten Alloy 625
Original language	English
Pages (from-to)	12-22
Journal	Berg- und hüttenmännische Monatshefte
Volume	149
Issue number	1
DOIs	https://doi.org/10.1007/s00501-013-0225-x
Publication status	Published - 2014

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Advanced Materials Science

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10.1007/s00501-013-0225-x

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title = "Sensitization of as rolled and stable annealed Alloy 625",

abstract = "Alloy 625 is used as cladding material in the oil and gas industry. Different annealing conditions are used, these are stable annealed and as rolled. Both conditions have been isothermally sensitized in a laboratory resistance furnace. The annealing temperature was up to 1050 °C and the annealing time up to 10 h. Susceptibility to intergranular corrosion has been investigated by means of a conventional immersion tests according to ASTM G28A and the Double Loop—Electrochemical Potentiokinetic Reactivation Test (DL-EPR method). Scanning electron microscopy (SEM) was used to evaluate microstructure and type of attack after testing. The chemical composition of precipitated phases was characterized by SEM and Transmission Electron Microscopy (TEM). High-resolution investigations with concentration profiles proved high molybdenum precipitates to determine the degree of sensitization.",

author = "Roland Lackner and G Mori and R. Egger and F. Winter and Mihaela Albu and Werner Grogger",

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T1 - Sensitization of as rolled and stable annealed Alloy 625

AU - Lackner, Roland

AU - Mori, G

AU - Egger, R.

AU - Winter, F.

AU - Albu, Mihaela

AU - Grogger, Werner

PY - 2014

Y1 - 2014

N2 - Alloy 625 is used as cladding material in the oil and gas industry. Different annealing conditions are used, these are stable annealed and as rolled. Both conditions have been isothermally sensitized in a laboratory resistance furnace. The annealing temperature was up to 1050 °C and the annealing time up to 10 h. Susceptibility to intergranular corrosion has been investigated by means of a conventional immersion tests according to ASTM G28A and the Double Loop—Electrochemical Potentiokinetic Reactivation Test (DL-EPR method). Scanning electron microscopy (SEM) was used to evaluate microstructure and type of attack after testing. The chemical composition of precipitated phases was characterized by SEM and Transmission Electron Microscopy (TEM). High-resolution investigations with concentration profiles proved high molybdenum precipitates to determine the degree of sensitization.

AB - Alloy 625 is used as cladding material in the oil and gas industry. Different annealing conditions are used, these are stable annealed and as rolled. Both conditions have been isothermally sensitized in a laboratory resistance furnace. The annealing temperature was up to 1050 °C and the annealing time up to 10 h. Susceptibility to intergranular corrosion has been investigated by means of a conventional immersion tests according to ASTM G28A and the Double Loop—Electrochemical Potentiokinetic Reactivation Test (DL-EPR method). Scanning electron microscopy (SEM) was used to evaluate microstructure and type of attack after testing. The chemical composition of precipitated phases was characterized by SEM and Transmission Electron Microscopy (TEM). High-resolution investigations with concentration profiles proved high molybdenum precipitates to determine the degree of sensitization.

U2 - 10.1007/s00501-013-0225-x

DO - 10.1007/s00501-013-0225-x

M3 - Article

SN - 1613-7531

VL - 149

SP - 12

EP - 22

JO - Berg- und hüttenmännische Monatshefte

JF - Berg- und hüttenmännische Monatshefte

IS - 1

ER -

Sensitization of as rolled and stable annealed Alloy 625

Abstract

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