Hydrothermally prepared layered double hydroxide coatings for corrosion protection of Mg alloys – a critical review
Layered double hydroxide (LDH) coatings emerge as a sound strategy to mitigate corrosion of magnesium (Mg) alloys owing to their unique anion-exchange capability to entrapping aggressive anions, such as chloride. The most common approach for fabricating protective LDH coatings upon the surface of Mg...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-12-01
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| Series: | Corrosion Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667266922000494 |
| _version_ | 1797978722552250368 |
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| author | Lei Liu Qiushi Deng Paul White Shuai Dong Ivan S. Cole Jie Dong Xiao-Bo Chen |
| author_facet | Lei Liu Qiushi Deng Paul White Shuai Dong Ivan S. Cole Jie Dong Xiao-Bo Chen |
| author_sort | Lei Liu |
| collection | DOAJ |
| description | Layered double hydroxide (LDH) coatings emerge as a sound strategy to mitigate corrosion of magnesium (Mg) alloys owing to their unique anion-exchange capability to entrapping aggressive anions, such as chloride. The most common approach for fabricating protective LDH coatings upon the surface of Mg alloys is hydrothermal treatment, which is ascribed to their simple manipulation, rich diversity in chemistry and structure of resultants, and high coating adhesion via chemical bonding. This article reviews the roles of key processing variables of hydrothermal manufacturing of LDH coatings to provide insights for design and optimising LDH coatings with satisfactory corrosion protection to Mg alloys. The selected key variables include chemistry and microstructure of Mg alloy substrate, components of LDH solution, hydrothermal operational conditions (mainly involving solution pH, reaction temperature and reaction time duration), and anionic types used in post anion-exchange treatment. The contributions of those variables to the growth behavior of LDH coatings are discussed. The relationships between LDH coating structure and its corrosion mitigation are also established. Finally, the strength and limitations of existing work are critically articulated and future research directions are proposed accordingly. |
| first_indexed | 2024-04-11T05:28:37Z |
| format | Article |
| id | doaj.art-cd52ba5e0c084b7d944d429f7ccb2a06 |
| institution | Directory Open Access Journal |
| issn | 2667-2669 |
| language | English |
| last_indexed | 2024-04-11T05:28:37Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Corrosion Communications |
| spelling | doaj.art-cd52ba5e0c084b7d944d429f7ccb2a062022-12-23T04:42:48ZengElsevierCorrosion Communications2667-26692022-12-0184048Hydrothermally prepared layered double hydroxide coatings for corrosion protection of Mg alloys – a critical reviewLei Liu0Qiushi Deng1Paul White2Shuai Dong3Ivan S. Cole4Jie Dong5Xiao-Bo Chen6National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Engineering, RMIT University, Melbourne VIC 3000, AustraliaSchool of Engineering, RMIT University, Melbourne VIC 3000, AustraliaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.School of Engineering, RMIT University, Melbourne VIC 3000, AustraliaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Engineering, RMIT University, Melbourne VIC 3000, Australia; Corresponding authors.Layered double hydroxide (LDH) coatings emerge as a sound strategy to mitigate corrosion of magnesium (Mg) alloys owing to their unique anion-exchange capability to entrapping aggressive anions, such as chloride. The most common approach for fabricating protective LDH coatings upon the surface of Mg alloys is hydrothermal treatment, which is ascribed to their simple manipulation, rich diversity in chemistry and structure of resultants, and high coating adhesion via chemical bonding. This article reviews the roles of key processing variables of hydrothermal manufacturing of LDH coatings to provide insights for design and optimising LDH coatings with satisfactory corrosion protection to Mg alloys. The selected key variables include chemistry and microstructure of Mg alloy substrate, components of LDH solution, hydrothermal operational conditions (mainly involving solution pH, reaction temperature and reaction time duration), and anionic types used in post anion-exchange treatment. The contributions of those variables to the growth behavior of LDH coatings are discussed. The relationships between LDH coating structure and its corrosion mitigation are also established. Finally, the strength and limitations of existing work are critically articulated and future research directions are proposed accordingly.http://www.sciencedirect.com/science/article/pii/S2667266922000494LDH coatingAnion exchangeHydrothermal treatmentMagnesium alloysCorrosion protection |
| spellingShingle | Lei Liu Qiushi Deng Paul White Shuai Dong Ivan S. Cole Jie Dong Xiao-Bo Chen Hydrothermally prepared layered double hydroxide coatings for corrosion protection of Mg alloys – a critical review Corrosion Communications LDH coating Anion exchange Hydrothermal treatment Magnesium alloys Corrosion protection |
| title | Hydrothermally prepared layered double hydroxide coatings for corrosion protection of Mg alloys – a critical review |
| title_full | Hydrothermally prepared layered double hydroxide coatings for corrosion protection of Mg alloys – a critical review |
| title_fullStr | Hydrothermally prepared layered double hydroxide coatings for corrosion protection of Mg alloys – a critical review |
| title_full_unstemmed | Hydrothermally prepared layered double hydroxide coatings for corrosion protection of Mg alloys – a critical review |
| title_short | Hydrothermally prepared layered double hydroxide coatings for corrosion protection of Mg alloys – a critical review |
| title_sort | hydrothermally prepared layered double hydroxide coatings for corrosion protection of mg alloys a critical review |
| topic | LDH coating Anion exchange Hydrothermal treatment Magnesium alloys Corrosion protection |
| url | http://www.sciencedirect.com/science/article/pii/S2667266922000494 |
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