Corrosion behavior of Inconel 625 deposited metal in molten KCl-MgCl2
In order to investigate the corrosion behavior of Inconel 625 deposited metal in molten KCl and MgCl _2 , the corrosion behavior of deposited metal immersed in molten salt for 60 h at 700 °C and 900 °C was studied by static corrosion immersion method. X-ray diffraction (XRD) and Geminisem300 were us...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/abcdd9 |
| _version_ | 1797746811448852480 |
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| author | Taisen Yang Yunhai Su Hongyu Liu Zhiyong Dai Xuewei Liang Xinggang Wu |
| author_facet | Taisen Yang Yunhai Su Hongyu Liu Zhiyong Dai Xuewei Liang Xinggang Wu |
| author_sort | Taisen Yang |
| collection | DOAJ |
| description | In order to investigate the corrosion behavior of Inconel 625 deposited metal in molten KCl and MgCl _2 , the corrosion behavior of deposited metal immersed in molten salt for 60 h at 700 °C and 900 °C was studied by static corrosion immersion method. X-ray diffraction (XRD) and Geminisem300 were used to systematically study the phase composition, corrosion morphology and element distribution of the deposited metal. The results show that: the corrosion weight loss of the deposited metal showed an increasing trend at both temperatures, but the increasing range was different in different time intervals. The corrosion weight loss of the deposited metal increased slowly in the first 10 h, and increased sharply in the 10 h–60 h. It can be found that 10 h is the cut-off point of corrosion behavior. The corrosion rate is 0.03 mm/year at 700 °C and 0.50 mm/year at 900 °C for 10 h. The corrosion resistance of the deposited metal at 700 °C is better than that at 900 °C, which is due to the formation of dense MgO on the surface of the deposited metal at 700 °C, which hinders the corrosion reaction; at 900 °C, the content of CrCl _3 on the surface of the deposited metal increases, resulting in a ‘shell breaking effect’, which destroys the MgO shell and forms NiCr _2 O _4 with spinel structure. Its corrosion resistance is thus weakened. |
| first_indexed | 2024-03-12T15:42:08Z |
| format | Article |
| id | doaj.art-69dc64a92c4f4b45bb2583703f60c903 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:42:08Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-69dc64a92c4f4b45bb2583703f60c9032023-08-09T15:54:19ZengIOP PublishingMaterials Research Express2053-15912020-01-0171212650510.1088/2053-1591/abcdd9Corrosion behavior of Inconel 625 deposited metal in molten KCl-MgCl2Taisen Yang0https://orcid.org/0000-0002-6852-9803Yunhai Su1Hongyu Liu2Zhiyong Dai3Xuewei Liang4Xinggang Wu5School of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of ChinaSchool of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of ChinaShenyang Huibo Heat Energy Equipment Co., Itd, Shenyang Academy of Instrumentation Science CO., LTD, Shenyang 110043, People’s Republic of ChinaSchool of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of ChinaSchool of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of ChinaSchool of Materials Science and Engineering, Shenyang University of Technology , Shenyang 110870, People’s Republic of ChinaIn order to investigate the corrosion behavior of Inconel 625 deposited metal in molten KCl and MgCl _2 , the corrosion behavior of deposited metal immersed in molten salt for 60 h at 700 °C and 900 °C was studied by static corrosion immersion method. X-ray diffraction (XRD) and Geminisem300 were used to systematically study the phase composition, corrosion morphology and element distribution of the deposited metal. The results show that: the corrosion weight loss of the deposited metal showed an increasing trend at both temperatures, but the increasing range was different in different time intervals. The corrosion weight loss of the deposited metal increased slowly in the first 10 h, and increased sharply in the 10 h–60 h. It can be found that 10 h is the cut-off point of corrosion behavior. The corrosion rate is 0.03 mm/year at 700 °C and 0.50 mm/year at 900 °C for 10 h. The corrosion resistance of the deposited metal at 700 °C is better than that at 900 °C, which is due to the formation of dense MgO on the surface of the deposited metal at 700 °C, which hinders the corrosion reaction; at 900 °C, the content of CrCl _3 on the surface of the deposited metal increases, resulting in a ‘shell breaking effect’, which destroys the MgO shell and forms NiCr _2 O _4 with spinel structure. Its corrosion resistance is thus weakened.https://doi.org/10.1088/2053-1591/abcdd9Inconel 625 deposited metalhigh temperature molten salt corrosionchloride molten saltphase composition of corrosion products |
| spellingShingle | Taisen Yang Yunhai Su Hongyu Liu Zhiyong Dai Xuewei Liang Xinggang Wu Corrosion behavior of Inconel 625 deposited metal in molten KCl-MgCl2 Materials Research Express Inconel 625 deposited metal high temperature molten salt corrosion chloride molten salt phase composition of corrosion products |
| title | Corrosion behavior of Inconel 625 deposited metal in molten KCl-MgCl2 |
| title_full | Corrosion behavior of Inconel 625 deposited metal in molten KCl-MgCl2 |
| title_fullStr | Corrosion behavior of Inconel 625 deposited metal in molten KCl-MgCl2 |
| title_full_unstemmed | Corrosion behavior of Inconel 625 deposited metal in molten KCl-MgCl2 |
| title_short | Corrosion behavior of Inconel 625 deposited metal in molten KCl-MgCl2 |
| title_sort | corrosion behavior of inconel 625 deposited metal in molten kcl mgcl2 |
| topic | Inconel 625 deposited metal high temperature molten salt corrosion chloride molten salt phase composition of corrosion products |
| url | https://doi.org/10.1088/2053-1591/abcdd9 |
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