Effect of grain size on high-temperature corrosion performance of laser cladding inconel 625 coating
As the calorific value of waste-to-energy incineration continues to rise, the corrosion damage to boilers becomes increasingly severe. The impact of the grain size on the high-temperature corrosion resistance of Inconel 625 coating was investigated. The results indicated that the corrosion performan...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424023226 |
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| author | Jiayi Peng Kaiyang Li Zhonghao Xie Liming Tan Yan Wang Feng Liu Yong Liu |
| author_facet | Jiayi Peng Kaiyang Li Zhonghao Xie Liming Tan Yan Wang Feng Liu Yong Liu |
| author_sort | Jiayi Peng |
| collection | DOAJ |
| description | As the calorific value of waste-to-energy incineration continues to rise, the corrosion damage to boilers becomes increasingly severe. The impact of the grain size on the high-temperature corrosion resistance of Inconel 625 coating was investigated. The results indicated that the corrosion performance of the coating in 1:1 NaCl–KCl salts at 700 °C for 120 h was highly dependent on the grain size of the coating. The coating fabricated with a laser power of 1800 W and an overlapping distance of 1.5 mm had an average grain size of 13.7 μm and highest hardness, exhibiting the best corrosion performance, with a corrosion weight loss of 1.4 mg/cm2. Coatings processed under different conditions all formed a three-layered structure, with a NiO outermost layer, a Cr2O3 intermediate layer, and an innermost Cr-depletion zone. Coatings with finer grains formed a continuous and dense protective oxide layer of NiO and Cr2O3 due to the rapid diffusion of alloy elements, effectively preventing the invasion of corrosive media and protecting the substrate from corrosion. |
| format | Article |
| id | doaj-art-9f626fa434f74004aedbe759eb97ed1b |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-9f626fa434f74004aedbe759eb97ed1b2025-08-20T02:39:11ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01333809381710.1016/j.jmrt.2024.10.052Effect of grain size on high-temperature corrosion performance of laser cladding inconel 625 coatingJiayi Peng0Kaiyang Li1Zhonghao Xie2Liming Tan3Yan Wang4Feng Liu5Yong Liu6State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaSchool of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China; Corresponding author.State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China; Corresponding author.State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, ChinaAs the calorific value of waste-to-energy incineration continues to rise, the corrosion damage to boilers becomes increasingly severe. The impact of the grain size on the high-temperature corrosion resistance of Inconel 625 coating was investigated. The results indicated that the corrosion performance of the coating in 1:1 NaCl–KCl salts at 700 °C for 120 h was highly dependent on the grain size of the coating. The coating fabricated with a laser power of 1800 W and an overlapping distance of 1.5 mm had an average grain size of 13.7 μm and highest hardness, exhibiting the best corrosion performance, with a corrosion weight loss of 1.4 mg/cm2. Coatings processed under different conditions all formed a three-layered structure, with a NiO outermost layer, a Cr2O3 intermediate layer, and an innermost Cr-depletion zone. Coatings with finer grains formed a continuous and dense protective oxide layer of NiO and Cr2O3 due to the rapid diffusion of alloy elements, effectively preventing the invasion of corrosive media and protecting the substrate from corrosion.http://www.sciencedirect.com/science/article/pii/S2238785424023226High-temperature corrosionInconel 625Laser claddingMolten salts |
| spellingShingle | Jiayi Peng Kaiyang Li Zhonghao Xie Liming Tan Yan Wang Feng Liu Yong Liu Effect of grain size on high-temperature corrosion performance of laser cladding inconel 625 coating Journal of Materials Research and Technology High-temperature corrosion Inconel 625 Laser cladding Molten salts |
| title | Effect of grain size on high-temperature corrosion performance of laser cladding inconel 625 coating |
| title_full | Effect of grain size on high-temperature corrosion performance of laser cladding inconel 625 coating |
| title_fullStr | Effect of grain size on high-temperature corrosion performance of laser cladding inconel 625 coating |
| title_full_unstemmed | Effect of grain size on high-temperature corrosion performance of laser cladding inconel 625 coating |
| title_short | Effect of grain size on high-temperature corrosion performance of laser cladding inconel 625 coating |
| title_sort | effect of grain size on high temperature corrosion performance of laser cladding inconel 625 coating |
| topic | High-temperature corrosion Inconel 625 Laser cladding Molten salts |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424023226 |
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