Corrosion mechanism of a high corrosion-resistance Zn–Al–Mg coating in typical extremely harsh marine and cold environments
The corrosion mechanism of a high corrosion-resistant Zn–Al–Mg coating exposed to typical extremely harsh environments in Wanning and Mohe was investigated. The findings revealed that the corrosion behavior of Zn–Al–Mg coating is significantly influenced by environmental conditions, exhibiting varyi...
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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/S2238785424023500 |
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| author | Yuwei Liu Tianzhen Gu Miaoran Liu Zhenyao Wang Gongwang Cao Quanzhong Guo Chuan Wang |
| author_facet | Yuwei Liu Tianzhen Gu Miaoran Liu Zhenyao Wang Gongwang Cao Quanzhong Guo Chuan Wang |
| author_sort | Yuwei Liu |
| collection | DOAJ |
| description | The corrosion mechanism of a high corrosion-resistant Zn–Al–Mg coating exposed to typical extremely harsh environments in Wanning and Mohe was investigated. The findings revealed that the corrosion behavior of Zn–Al–Mg coating is significantly influenced by environmental conditions, exhibiting varying rates and processes in high-temperature marine and extremely cold urban environments, which lead to distinct corrosion patterns and pit morphologies over time. In the marine atmosphere of Wanning, characterized by high temperature and humidity, corrosion preferentially occurs in the eutectic phase and extends towards the interior of the coating along the eutectic phase near the zinc-rich phase. The corrosion rate on the skyward side is smaller than that on the field-facing side, and this difference between the two sides initially decreases and later increases. However, in the urban atmosphere of Mohe, with extremely low temperatures, the phenomenon of localized corrosion is more pronounced. Corrosion pits tend to form in the eutectic phase near the zinc-rich phase, with their shapes gradually transitioning from sharp to shallow. After 6 and 12 months of exposure, the corrosion rate on the skyward side is smaller than that on the field-facing side, and after 24 months of exposure, both sides exhibit similar corrosion rates. |
| format | Article |
| id | doaj-art-d3c67f89631143748da321131c4d4b8c |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-d3c67f89631143748da321131c4d4b8c2025-08-20T01:57:20ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01334290430210.1016/j.jmrt.2024.10.080Corrosion mechanism of a high corrosion-resistance Zn–Al–Mg coating in typical extremely harsh marine and cold environmentsYuwei Liu0Tianzhen Gu1Miaoran Liu2Zhenyao Wang3Gongwang Cao4Quanzhong Guo5Chuan Wang6Corrosion Centre, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Shenyang, 110016, China; Corresponding author. Corrosion Centre, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.Corrosion Centre, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaNational Key Laboratory of Environmental Adaptability for Industrial Products, China National Electric Apparatus Research Institute Co., Ltd, Guangzhou, 510663, ChinaCorrosion Centre, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Shenyang, 110016, ChinaCorrosion Centre, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Shenyang, 110016, ChinaCorrosion Centre, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Shenyang, 110016, ChinaCorrosion Centre, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Liaoning Shenyang Soil and Atmosphere Corrosion of Material National Observation and Research Station, Shenyang, 110016, China; Corresponding author. Corrosion Centre, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.The corrosion mechanism of a high corrosion-resistant Zn–Al–Mg coating exposed to typical extremely harsh environments in Wanning and Mohe was investigated. The findings revealed that the corrosion behavior of Zn–Al–Mg coating is significantly influenced by environmental conditions, exhibiting varying rates and processes in high-temperature marine and extremely cold urban environments, which lead to distinct corrosion patterns and pit morphologies over time. In the marine atmosphere of Wanning, characterized by high temperature and humidity, corrosion preferentially occurs in the eutectic phase and extends towards the interior of the coating along the eutectic phase near the zinc-rich phase. The corrosion rate on the skyward side is smaller than that on the field-facing side, and this difference between the two sides initially decreases and later increases. However, in the urban atmosphere of Mohe, with extremely low temperatures, the phenomenon of localized corrosion is more pronounced. Corrosion pits tend to form in the eutectic phase near the zinc-rich phase, with their shapes gradually transitioning from sharp to shallow. After 6 and 12 months of exposure, the corrosion rate on the skyward side is smaller than that on the field-facing side, and after 24 months of exposure, both sides exhibit similar corrosion rates.http://www.sciencedirect.com/science/article/pii/S2238785424023500Zn-Al-Mg coatingLow temperature atmosphereMarine atmosphereAtmospheric corrosion |
| spellingShingle | Yuwei Liu Tianzhen Gu Miaoran Liu Zhenyao Wang Gongwang Cao Quanzhong Guo Chuan Wang Corrosion mechanism of a high corrosion-resistance Zn–Al–Mg coating in typical extremely harsh marine and cold environments Journal of Materials Research and Technology Zn-Al-Mg coating Low temperature atmosphere Marine atmosphere Atmospheric corrosion |
| title | Corrosion mechanism of a high corrosion-resistance Zn–Al–Mg coating in typical extremely harsh marine and cold environments |
| title_full | Corrosion mechanism of a high corrosion-resistance Zn–Al–Mg coating in typical extremely harsh marine and cold environments |
| title_fullStr | Corrosion mechanism of a high corrosion-resistance Zn–Al–Mg coating in typical extremely harsh marine and cold environments |
| title_full_unstemmed | Corrosion mechanism of a high corrosion-resistance Zn–Al–Mg coating in typical extremely harsh marine and cold environments |
| title_short | Corrosion mechanism of a high corrosion-resistance Zn–Al–Mg coating in typical extremely harsh marine and cold environments |
| title_sort | corrosion mechanism of a high corrosion resistance zn al mg coating in typical extremely harsh marine and cold environments |
| topic | Zn-Al-Mg coating Low temperature atmosphere Marine atmosphere Atmospheric corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424023500 |
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