Evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environment
The time-dependent degradation of galvanised steel bolts subjected to marine atmospheric exposure for a maximum period of 2 years in the Wenchang marine environment of Hainan province, South China, was investigated. The results showed that the zinc coating used as a protective surface finish deterio...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423027448 |
| _version_ | 1797301550234730496 |
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| author | Enobong Felix Daniel Changgang Wang Chao Li Junhua Dong Inime Ime Udoh Dongjiu Zhang Wenan Zhong Sheng Zhong |
| author_facet | Enobong Felix Daniel Changgang Wang Chao Li Junhua Dong Inime Ime Udoh Dongjiu Zhang Wenan Zhong Sheng Zhong |
| author_sort | Enobong Felix Daniel |
| collection | DOAJ |
| description | The time-dependent degradation of galvanised steel bolts subjected to marine atmospheric exposure for a maximum period of 2 years in the Wenchang marine environment of Hainan province, South China, was investigated. The results showed that the zinc coating used as a protective surface finish deteriorated quickly due to the harsh environmental conditions. The deterioration of the zinc coating resulted in premature corrosion of the underlying steel substrate as early as 6 months. The main Zn corrosion products found at the initial exposure time were simonkollite (Zn5(OH)8Cl2·H2O), hydrozincite (Zn5(OH)6(CO3)2), and zincite (ZnO). At subsequent exposure times, major steel corrosion products such as lepidocrocite (γ-FeOOH), akaganeite (β-FeOOH), goethite (α-FeOOH), magnetite (Fe3O4), and maghemite (γ-Fe2O3) were detected. Fe3O4/γ-Fe2O3 was consistently found in the rust formed at both the exposed and crevice thread regions between 6 and 24 months of exposure. Based on the geometry of the bolt fastener, the corrosion rate and phase composition distribution varied between the two regions. Differences in oxygen exposure levels, corrosion kinetics, and electrochemical stability of the corrosion products were primary factors in these distinctive corrosion behaviours. |
| first_indexed | 2024-03-07T23:23:14Z |
| format | Article |
| id | doaj.art-cba7b428c266441eb2fb37f679b969d0 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:23:14Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-cba7b428c266441eb2fb37f679b969d02024-02-21T05:27:16ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012751775190Evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environmentEnobong Felix Daniel0Changgang Wang1Chao Li2Junhua Dong3Inime Ime Udoh4Dongjiu Zhang5Wenan Zhong6Sheng Zhong7School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Corresponding author. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Corresponding author. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaSchool of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Corresponding author. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang, 110159, ChinaKey Laboratory of Space Launching Site Reliability, Xichang Satellite Launch Center, Hainan, Haikou, 571126, ChinaKey Laboratory of Space Launching Site Reliability, Xichang Satellite Launch Center, Hainan, Haikou, 571126, ChinaKey Laboratory of Space Launching Site Reliability, Xichang Satellite Launch Center, Hainan, Haikou, 571126, ChinaThe time-dependent degradation of galvanised steel bolts subjected to marine atmospheric exposure for a maximum period of 2 years in the Wenchang marine environment of Hainan province, South China, was investigated. The results showed that the zinc coating used as a protective surface finish deteriorated quickly due to the harsh environmental conditions. The deterioration of the zinc coating resulted in premature corrosion of the underlying steel substrate as early as 6 months. The main Zn corrosion products found at the initial exposure time were simonkollite (Zn5(OH)8Cl2·H2O), hydrozincite (Zn5(OH)6(CO3)2), and zincite (ZnO). At subsequent exposure times, major steel corrosion products such as lepidocrocite (γ-FeOOH), akaganeite (β-FeOOH), goethite (α-FeOOH), magnetite (Fe3O4), and maghemite (γ-Fe2O3) were detected. Fe3O4/γ-Fe2O3 was consistently found in the rust formed at both the exposed and crevice thread regions between 6 and 24 months of exposure. Based on the geometry of the bolt fastener, the corrosion rate and phase composition distribution varied between the two regions. Differences in oxygen exposure levels, corrosion kinetics, and electrochemical stability of the corrosion products were primary factors in these distinctive corrosion behaviours.http://www.sciencedirect.com/science/article/pii/S2238785423027448Bolt-nut fastenerGalvanised steelBolt threadsCreviceChloride ionsAtmospheric corrosion |
| spellingShingle | Enobong Felix Daniel Changgang Wang Chao Li Junhua Dong Inime Ime Udoh Dongjiu Zhang Wenan Zhong Sheng Zhong Evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environment Journal of Materials Research and Technology Bolt-nut fastener Galvanised steel Bolt threads Crevice Chloride ions Atmospheric corrosion |
| title | Evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environment |
| title_full | Evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environment |
| title_fullStr | Evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environment |
| title_full_unstemmed | Evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environment |
| title_short | Evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environment |
| title_sort | evolution of corrosion degradation in galvanised steel bolts exposed to a tropical marine environment |
| topic | Bolt-nut fastener Galvanised steel Bolt threads Crevice Chloride ions Atmospheric corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423027448 |
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