Corrosion mechanism of cold forged 316 stainless steel in molten FLiNaK salt

Minsung Hong; Shmuel Samuha; Peter Hosemann

doi:10.1016/j.corsci.2024.111990

Corrosion mechanism of cold forged 316 stainless steel in molten FLiNaK salt

Minsung Hong, Shmuel Samuha, Peter Hosemann

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

5 Scopus citations

Abstract

This study examined how cold forging (CF) affects the corrosion of 316 stainless steel (SS) in molten FLiNaK salt at 700 °C for 48 h. CF samples had two corrosion areas: one near the top and another displaying intergranular corrosion (IGC). Samples with lower CF (5–30 %) showed more IGC, while the 50 % CF sample had less IGC but the shallowest corrosion depth. This was due to the increased number of grain boundaries, which raised the potential corrosion initiation sites, and certain grain boundaries promoting chromium dissolution, thus enhancing IGC.

Original language	English
Article number	111990
Journal	Corrosion Science
Volume	232
DOIs	https://doi.org/10.1016/j.corsci.2024.111990
State	Published - 15 May 2024
Externally published	Yes

Keywords

Austenitic stainless steel
Cold forging
Deformation
FLiNaK
Intergranular Corrosion
Molten salt

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

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10.1016/j.corsci.2024.111990

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title = "Corrosion mechanism of cold forged 316 stainless steel in molten FLiNaK salt",

abstract = "This study examined how cold forging (CF) affects the corrosion of 316 stainless steel (SS) in molten FLiNaK salt at 700 °C for 48 h. CF samples had two corrosion areas: one near the top and another displaying intergranular corrosion (IGC). Samples with lower CF (5–30 %) showed more IGC, while the 50 % CF sample had less IGC but the shallowest corrosion depth. This was due to the increased number of grain boundaries, which raised the potential corrosion initiation sites, and certain grain boundaries promoting chromium dissolution, thus enhancing IGC.",

keywords = "Austenitic stainless steel, Cold forging, Deformation, FLiNaK, Intergranular Corrosion, Molten salt",

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AU - Hong, Minsung

AU - Samuha, Shmuel

AU - Hosemann, Peter

PY - 2024/5/15

Y1 - 2024/5/15

N2 - This study examined how cold forging (CF) affects the corrosion of 316 stainless steel (SS) in molten FLiNaK salt at 700 °C for 48 h. CF samples had two corrosion areas: one near the top and another displaying intergranular corrosion (IGC). Samples with lower CF (5–30 %) showed more IGC, while the 50 % CF sample had less IGC but the shallowest corrosion depth. This was due to the increased number of grain boundaries, which raised the potential corrosion initiation sites, and certain grain boundaries promoting chromium dissolution, thus enhancing IGC.

AB - This study examined how cold forging (CF) affects the corrosion of 316 stainless steel (SS) in molten FLiNaK salt at 700 °C for 48 h. CF samples had two corrosion areas: one near the top and another displaying intergranular corrosion (IGC). Samples with lower CF (5–30 %) showed more IGC, while the 50 % CF sample had less IGC but the shallowest corrosion depth. This was due to the increased number of grain boundaries, which raised the potential corrosion initiation sites, and certain grain boundaries promoting chromium dissolution, thus enhancing IGC.

KW - Austenitic stainless steel

KW - Cold forging

KW - Deformation

KW - FLiNaK

KW - Intergranular Corrosion

KW - Molten salt

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DO - 10.1016/j.corsci.2024.111990

M3 - Article

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SN - 0010-938X

VL - 232

JO - Corrosion Science

JF - Corrosion Science

M1 - 111990

ER -

Corrosion mechanism of cold forged 316 stainless steel in molten FLiNaK salt

Abstract

Keywords

ASJC Scopus subject areas

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