Influence of dissolved hydrogen and IG Cr carbide on the oxidation behavior of Alloy 600 in hydrogenated primary water
The internal oxidation (IO) and preferential intergranular oxidation (PIO) behavior of Alloy 600 depending on the dissolved hydrogen (DH) content and the IG Cr carbide in hydrogenated primary water were characterized in detail using analytical electron microscopy techniques. The oxidation layer was...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573324003814 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841545574931759104 |
|---|---|
| author | Yun Soo Lim Dong Jin Kim Sung Woo Kim Seong Sik Hwang Sung Hwan Cho Hong Pyo Kim |
| author_facet | Yun Soo Lim Dong Jin Kim Sung Woo Kim Seong Sik Hwang Sung Hwan Cho Hong Pyo Kim |
| author_sort | Yun Soo Lim |
| collection | DOAJ |
| description | The internal oxidation (IO) and preferential intergranular oxidation (PIO) behavior of Alloy 600 depending on the dissolved hydrogen (DH) content and the IG Cr carbide in hydrogenated primary water were characterized in detail using analytical electron microscopy techniques. The oxidation layer was unstable when the DH concentration was such that Ni was in the vicinity of Ni/NiO equilibrium and it could easily be peeled off. Hence, the grain boundaries of the bare metal were attacked. PIO occurred and Cr-rich oxide identified as Cr2O3 was formed at the oxidized grain boundary. NiO emerged when the DH concentration was such that Ni was in an oxidizing state, whereas Ni enrichment occurred inside the oxidized grain boundary when the DH concentration was such that Ni was in a reducing state with respective to Ni/NiO equilibrium. The IG Cr carbide strongly affected the PIO behavior by means of the consumption of oxygen penetrating into the grain boundary. The depth of the IO layer decreased as the DH concentration increased. The different oxidation behaviors depending on the DH content and IG Cr carbide are believed to affect the PWSCC resistance of Alloy 600 significantly. |
| format | Article |
| id | doaj-art-3e579552e7f546eea649ed10fea369fe |
| institution | Kabale University |
| issn | 1738-5733 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj-art-3e579552e7f546eea649ed10fea369fe2025-01-12T05:24:35ZengElsevierNuclear Engineering and Technology1738-57332025-01-01571103134Influence of dissolved hydrogen and IG Cr carbide on the oxidation behavior of Alloy 600 in hydrogenated primary waterYun Soo Lim0Dong Jin Kim1Sung Woo Kim2Seong Sik Hwang3Sung Hwan Cho4Hong Pyo Kim5Corresponding author.; Materials Safety Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of KoreaMaterials Safety Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of KoreaMaterials Safety Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of KoreaMaterials Safety Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of KoreaMaterials Safety Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of KoreaMaterials Safety Technology Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 34057, Republic of KoreaThe internal oxidation (IO) and preferential intergranular oxidation (PIO) behavior of Alloy 600 depending on the dissolved hydrogen (DH) content and the IG Cr carbide in hydrogenated primary water were characterized in detail using analytical electron microscopy techniques. The oxidation layer was unstable when the DH concentration was such that Ni was in the vicinity of Ni/NiO equilibrium and it could easily be peeled off. Hence, the grain boundaries of the bare metal were attacked. PIO occurred and Cr-rich oxide identified as Cr2O3 was formed at the oxidized grain boundary. NiO emerged when the DH concentration was such that Ni was in an oxidizing state, whereas Ni enrichment occurred inside the oxidized grain boundary when the DH concentration was such that Ni was in a reducing state with respective to Ni/NiO equilibrium. The IG Cr carbide strongly affected the PIO behavior by means of the consumption of oxygen penetrating into the grain boundary. The depth of the IO layer decreased as the DH concentration increased. The different oxidation behaviors depending on the DH content and IG Cr carbide are believed to affect the PWSCC resistance of Alloy 600 significantly.http://www.sciencedirect.com/science/article/pii/S1738573324003814Alloy 600Internal oxidationPreferential intergranular oxidationDissolved hydrogenIntergranular Cr carbide |
| spellingShingle | Yun Soo Lim Dong Jin Kim Sung Woo Kim Seong Sik Hwang Sung Hwan Cho Hong Pyo Kim Influence of dissolved hydrogen and IG Cr carbide on the oxidation behavior of Alloy 600 in hydrogenated primary water Nuclear Engineering and Technology Alloy 600 Internal oxidation Preferential intergranular oxidation Dissolved hydrogen Intergranular Cr carbide |
| title | Influence of dissolved hydrogen and IG Cr carbide on the oxidation behavior of Alloy 600 in hydrogenated primary water |
| title_full | Influence of dissolved hydrogen and IG Cr carbide on the oxidation behavior of Alloy 600 in hydrogenated primary water |
| title_fullStr | Influence of dissolved hydrogen and IG Cr carbide on the oxidation behavior of Alloy 600 in hydrogenated primary water |
| title_full_unstemmed | Influence of dissolved hydrogen and IG Cr carbide on the oxidation behavior of Alloy 600 in hydrogenated primary water |
| title_short | Influence of dissolved hydrogen and IG Cr carbide on the oxidation behavior of Alloy 600 in hydrogenated primary water |
| title_sort | influence of dissolved hydrogen and ig cr carbide on the oxidation behavior of alloy 600 in hydrogenated primary water |
| topic | Alloy 600 Internal oxidation Preferential intergranular oxidation Dissolved hydrogen Intergranular Cr carbide |
| url | http://www.sciencedirect.com/science/article/pii/S1738573324003814 |
| work_keys_str_mv | AT yunsoolim influenceofdissolvedhydrogenandigcrcarbideontheoxidationbehaviorofalloy600inhydrogenatedprimarywater AT dongjinkim influenceofdissolvedhydrogenandigcrcarbideontheoxidationbehaviorofalloy600inhydrogenatedprimarywater AT sungwookim influenceofdissolvedhydrogenandigcrcarbideontheoxidationbehaviorofalloy600inhydrogenatedprimarywater AT seongsikhwang influenceofdissolvedhydrogenandigcrcarbideontheoxidationbehaviorofalloy600inhydrogenatedprimarywater AT sunghwancho influenceofdissolvedhydrogenandigcrcarbideontheoxidationbehaviorofalloy600inhydrogenatedprimarywater AT hongpyokim influenceofdissolvedhydrogenandigcrcarbideontheoxidationbehaviorofalloy600inhydrogenatedprimarywater |