Corrosion Behavior of Nitrogen-Containing Low-Nickel Weld Cladding in KCl-MgCl<sub>2</sub> Eutectic Molten Salt at 900 °C
In this paper, the element nitrogen (N) is used to partially replace the element nickel (Ni) in flux-cored wire. A 44%Ni-24%Cr-0.18N nitrogen-containing low-nickel flux-cored wire with excellent corrosion resistance is prepared. The corrosion behavior of nitrogen-containing low-nickel weld cladding...
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MDPI AG
2022-12-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/24/8831 |
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| author | Taisen Yang Yunhai Su Zhiyong Dai Yingdi Wang Xuewei Liang Zuyong Wei |
| author_facet | Taisen Yang Yunhai Su Zhiyong Dai Yingdi Wang Xuewei Liang Zuyong Wei |
| author_sort | Taisen Yang |
| collection | DOAJ |
| description | In this paper, the element nitrogen (N) is used to partially replace the element nickel (Ni) in flux-cored wire. A 44%Ni-24%Cr-0.18N nitrogen-containing low-nickel flux-cored wire with excellent corrosion resistance is prepared. The corrosion behavior of nitrogen-containing low-nickel weld cladding and Inconel 625 weld cladding in 40 KCl + 60 MgCl<sub>2</sub> (wt%) molten salt at 900 °C is studied. The results show that the selective dissolution of Cr occurs in both weld claddings. The corrosion resistance of the 44%Ni-24%Cr-0.18N nitrogen-containing low-nickel weld cladding is better than that of the Inconel 625 weld cladding. The reason is that added N can react with H<sup>+</sup> in molten salt to generate <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></mrow></semantics></math></inline-formula>, remove corrosive impurities of MgOH<sup>+</sup> in molten salt and change the corrosion environment. N preferentially combines with Cr to form Cr<sub>2</sub>N, reduces the diffusion precipitation of Cr and improves the corrosion resistance. |
| first_indexed | 2024-03-09T16:09:17Z |
| format | Article |
| id | doaj.art-abad38f42870487db539888b57e6d6b3 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T16:09:17Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-abad38f42870487db539888b57e6d6b32023-11-24T16:22:23ZengMDPI AGMaterials1996-19442022-12-011524883110.3390/ma15248831Corrosion Behavior of Nitrogen-Containing Low-Nickel Weld Cladding in KCl-MgCl<sub>2</sub> Eutectic Molten Salt at 900 °CTaisen Yang0Yunhai Su1Zhiyong Dai2Yingdi Wang3Xuewei Liang4Zuyong Wei5School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaIn this paper, the element nitrogen (N) is used to partially replace the element nickel (Ni) in flux-cored wire. A 44%Ni-24%Cr-0.18N nitrogen-containing low-nickel flux-cored wire with excellent corrosion resistance is prepared. The corrosion behavior of nitrogen-containing low-nickel weld cladding and Inconel 625 weld cladding in 40 KCl + 60 MgCl<sub>2</sub> (wt%) molten salt at 900 °C is studied. The results show that the selective dissolution of Cr occurs in both weld claddings. The corrosion resistance of the 44%Ni-24%Cr-0.18N nitrogen-containing low-nickel weld cladding is better than that of the Inconel 625 weld cladding. The reason is that added N can react with H<sup>+</sup> in molten salt to generate <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></mrow></semantics></math></inline-formula>, remove corrosive impurities of MgOH<sup>+</sup> in molten salt and change the corrosion environment. N preferentially combines with Cr to form Cr<sub>2</sub>N, reduces the diffusion precipitation of Cr and improves the corrosion resistance.https://www.mdpi.com/1996-1944/15/24/8831nitrogen-containing low-nickel weld claddinghigh-temperature corrosionchloride molten salt |
| spellingShingle | Taisen Yang Yunhai Su Zhiyong Dai Yingdi Wang Xuewei Liang Zuyong Wei Corrosion Behavior of Nitrogen-Containing Low-Nickel Weld Cladding in KCl-MgCl<sub>2</sub> Eutectic Molten Salt at 900 °C Materials nitrogen-containing low-nickel weld cladding high-temperature corrosion chloride molten salt |
| title | Corrosion Behavior of Nitrogen-Containing Low-Nickel Weld Cladding in KCl-MgCl<sub>2</sub> Eutectic Molten Salt at 900 °C |
| title_full | Corrosion Behavior of Nitrogen-Containing Low-Nickel Weld Cladding in KCl-MgCl<sub>2</sub> Eutectic Molten Salt at 900 °C |
| title_fullStr | Corrosion Behavior of Nitrogen-Containing Low-Nickel Weld Cladding in KCl-MgCl<sub>2</sub> Eutectic Molten Salt at 900 °C |
| title_full_unstemmed | Corrosion Behavior of Nitrogen-Containing Low-Nickel Weld Cladding in KCl-MgCl<sub>2</sub> Eutectic Molten Salt at 900 °C |
| title_short | Corrosion Behavior of Nitrogen-Containing Low-Nickel Weld Cladding in KCl-MgCl<sub>2</sub> Eutectic Molten Salt at 900 °C |
| title_sort | corrosion behavior of nitrogen containing low nickel weld cladding in kcl mgcl sub 2 sub eutectic molten salt at 900 °c |
| topic | nitrogen-containing low-nickel weld cladding high-temperature corrosion chloride molten salt |
| url | https://www.mdpi.com/1996-1944/15/24/8831 |
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