Effects of Al-Mg on the Microstructure and Phase Distribution of Zn-Al-Mg Coatings
In this work, the composition of the zinc–aluminum–magnesium alloy coating was designed to have a fixed aluminum–magnesium ratio of 1:1, while the content of aluminum and magnesium elements increases gradually within the range of 1–2 wt.%. The micro-morphology of the coating with different compositi...
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MDPI AG
2022-12-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/1/46 |
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| author | Ziyue Zhang Jie Zhang Xingyuan Zhao Xuequn Cheng Sheming Jiang Qifu Zhang |
| author_facet | Ziyue Zhang Jie Zhang Xingyuan Zhao Xuequn Cheng Sheming Jiang Qifu Zhang |
| author_sort | Ziyue Zhang |
| collection | DOAJ |
| description | In this work, the composition of the zinc–aluminum–magnesium alloy coating was designed to have a fixed aluminum–magnesium ratio of 1:1, while the content of aluminum and magnesium elements increases gradually within the range of 1–2 wt.%. The micro-morphology of the coating with different compositions was observed by a scanning electron microscope (SEM). Combined with the surface distribution results of energy dispersive spectrometer (EDS) analysis elements and the phase analysis results of diffraction of X-rays (XRD), the phase distribution of the coating is understood. The statistical calculation of the phase distribution was carried out after staining the SEM image by ImageJ, This is consistent with the solidification simulation results of the thermodynamic simulation software (PADAT). The influence of magnesium and aluminum elements on the microscopic morphology and phase distribution of the zinc–aluminum–magnesium (ZnAlMg) coating was studied, and the mechanism of action was analyzed. The results show that the volume ratio of binary eutectic phase (Zn/MgZn<sub>2</sub>) and ternary eutectic phase (Zn/Al/MgZn<sub>2</sub>) in the coating tends to increase as the contents of the two elements elevate. The quantity of MgZn<sub>2</sub> is the critical factor for the corrosion resistance of the coating; the more MgZn<sub>2</sub>, the better the corrosion resistance. |
| first_indexed | 2024-03-09T11:42:17Z |
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| id | doaj.art-2f8e0a91feda4a70aba5c6b207db9bcf |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T11:42:17Z |
| publishDate | 2022-12-01 |
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| record_format | Article |
| series | Metals |
| spelling | doaj.art-2f8e0a91feda4a70aba5c6b207db9bcf2023-11-30T23:29:58ZengMDPI AGMetals2075-47012022-12-011314610.3390/met13010046Effects of Al-Mg on the Microstructure and Phase Distribution of Zn-Al-Mg CoatingsZiyue Zhang0Jie Zhang1Xingyuan Zhao2Xuequn Cheng3Sheming Jiang4Qifu Zhang5Corrosion & Protection Center, University of Science & Technology Beijing, Beijing 100083, ChinaNational Engineering Laboratory of Advanced Coating Technology for Metals, Central Iron & Steel Research Institute, Beijing 100081, ChinaNational Engineering Laboratory of Advanced Coating Technology for Metals, Central Iron & Steel Research Institute, Beijing 100081, ChinaCorrosion & Protection Center, University of Science & Technology Beijing, Beijing 100083, ChinaNational Engineering Laboratory of Advanced Coating Technology for Metals, Central Iron & Steel Research Institute, Beijing 100081, ChinaNational Engineering Laboratory of Advanced Coating Technology for Metals, Central Iron & Steel Research Institute, Beijing 100081, ChinaIn this work, the composition of the zinc–aluminum–magnesium alloy coating was designed to have a fixed aluminum–magnesium ratio of 1:1, while the content of aluminum and magnesium elements increases gradually within the range of 1–2 wt.%. The micro-morphology of the coating with different compositions was observed by a scanning electron microscope (SEM). Combined with the surface distribution results of energy dispersive spectrometer (EDS) analysis elements and the phase analysis results of diffraction of X-rays (XRD), the phase distribution of the coating is understood. The statistical calculation of the phase distribution was carried out after staining the SEM image by ImageJ, This is consistent with the solidification simulation results of the thermodynamic simulation software (PADAT). The influence of magnesium and aluminum elements on the microscopic morphology and phase distribution of the zinc–aluminum–magnesium (ZnAlMg) coating was studied, and the mechanism of action was analyzed. The results show that the volume ratio of binary eutectic phase (Zn/MgZn<sub>2</sub>) and ternary eutectic phase (Zn/Al/MgZn<sub>2</sub>) in the coating tends to increase as the contents of the two elements elevate. The quantity of MgZn<sub>2</sub> is the critical factor for the corrosion resistance of the coating; the more MgZn<sub>2</sub>, the better the corrosion resistance.https://www.mdpi.com/2075-4701/13/1/46Zn-Al-Mg coatingscoating microstructurephase distributioncorrosion resistance |
| spellingShingle | Ziyue Zhang Jie Zhang Xingyuan Zhao Xuequn Cheng Sheming Jiang Qifu Zhang Effects of Al-Mg on the Microstructure and Phase Distribution of Zn-Al-Mg Coatings Metals Zn-Al-Mg coatings coating microstructure phase distribution corrosion resistance |
| title | Effects of Al-Mg on the Microstructure and Phase Distribution of Zn-Al-Mg Coatings |
| title_full | Effects of Al-Mg on the Microstructure and Phase Distribution of Zn-Al-Mg Coatings |
| title_fullStr | Effects of Al-Mg on the Microstructure and Phase Distribution of Zn-Al-Mg Coatings |
| title_full_unstemmed | Effects of Al-Mg on the Microstructure and Phase Distribution of Zn-Al-Mg Coatings |
| title_short | Effects of Al-Mg on the Microstructure and Phase Distribution of Zn-Al-Mg Coatings |
| title_sort | effects of al mg on the microstructure and phase distribution of zn al mg coatings |
| topic | Zn-Al-Mg coatings coating microstructure phase distribution corrosion resistance |
| url | https://www.mdpi.com/2075-4701/13/1/46 |
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