Corrosion protection of Aluminium Alloy 2024 through an epoxy coating embedded with smart microcapsules: The responses of smart microcapsules to corrosive entities
This article employed a layer-by-layer approach to modify the interfacial boundary of halloysite clay nanotubes (HNTs) using (poly (diallyldimethylammonium chloride)) (PDDA) and poly (styrene sulfonate) (PSS) polyelectrolytes to form core (inhibitor-loaded HNTs)-shell (polyelectrolytes layers (PDDA/...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-03-01
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| Series: | Corrosion Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667266921000050 |
| _version_ | 1818990511967436800 |
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| author | Miaomiao Cui Demian I. Njoku Bowen Li Lihui Yang Zuankai Wang Baorong Hou Ying Li |
| author_facet | Miaomiao Cui Demian I. Njoku Bowen Li Lihui Yang Zuankai Wang Baorong Hou Ying Li |
| author_sort | Miaomiao Cui |
| collection | DOAJ |
| description | This article employed a layer-by-layer approach to modify the interfacial boundary of halloysite clay nanotubes (HNTs) using (poly (diallyldimethylammonium chloride)) (PDDA) and poly (styrene sulfonate) (PSS) polyelectrolytes to form core (inhibitor-loaded HNTs)-shell (polyelectrolytes layers (PDDA/PSS)) structured smart microcapsules or micro-containers. Responses of the smart microcapsules to changes in pH (H+), Cl−, OH− and H2O during the release of the loaded inhibitor (2-mecaptobenzothiazole inhibitor (2-MBT)) coupled with the number of PDDA/PSS polyelectrolytes layers (n) required to obtain optimal response were characterized. The anticorrosion efficacies of several organic compounds were screened to identify the most suitable inhibitor for the protection of Al alloy 2024 in 3.5 wt.% NaCl. 2-MBT which exhibits the best inhibition efficiency was successfully loaded into the HNTs lumen as demonstrated by TGA and DSC results. The release profiles of 2-MBT reveal that the sensitivity of the smart microcapsules to the various external stimuli decreased in the following order: pH > Cl− > H2O > OH−; and three-layered polyelectrolyte (3n) displays the highest sensitivity amongst the studied layer numbers (n). The release profiles were fitted to the Pappas and Weibull's models which describe the release mechanisms. Compatibility of the smart microcapsules with epoxy coating coupled with the anticorrosion effect on Al alloy 2024 substrate were evaluated by means of long-term salt spray and immersion tests. |
| first_indexed | 2024-12-20T19:55:33Z |
| format | Article |
| id | doaj.art-f9ea88522e6040bb986c7229523df3ac |
| institution | Directory Open Access Journal |
| issn | 2667-2669 |
| language | English |
| last_indexed | 2024-12-20T19:55:33Z |
| publishDate | 2021-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Corrosion Communications |
| spelling | doaj.art-f9ea88522e6040bb986c7229523df3ac2022-12-21T19:28:11ZengElsevierCorrosion Communications2667-26692021-03-01119Corrosion protection of Aluminium Alloy 2024 through an epoxy coating embedded with smart microcapsules: The responses of smart microcapsules to corrosive entitiesMiaomiao Cui0Demian I. Njoku1Bowen Li2Lihui Yang3Zuankai Wang4Baorong Hou5Ying Li6Corrosion and Protection Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, ChinaCorrosion and Protection Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaCorrosion and Protection Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaKey Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, ChinaDepartment of Mechanical Engineering, City University of Hong Kong, Hong Kong, ChinaKey Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, ChinaCorrosion and Protection Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, ChinaThis article employed a layer-by-layer approach to modify the interfacial boundary of halloysite clay nanotubes (HNTs) using (poly (diallyldimethylammonium chloride)) (PDDA) and poly (styrene sulfonate) (PSS) polyelectrolytes to form core (inhibitor-loaded HNTs)-shell (polyelectrolytes layers (PDDA/PSS)) structured smart microcapsules or micro-containers. Responses of the smart microcapsules to changes in pH (H+), Cl−, OH− and H2O during the release of the loaded inhibitor (2-mecaptobenzothiazole inhibitor (2-MBT)) coupled with the number of PDDA/PSS polyelectrolytes layers (n) required to obtain optimal response were characterized. The anticorrosion efficacies of several organic compounds were screened to identify the most suitable inhibitor for the protection of Al alloy 2024 in 3.5 wt.% NaCl. 2-MBT which exhibits the best inhibition efficiency was successfully loaded into the HNTs lumen as demonstrated by TGA and DSC results. The release profiles of 2-MBT reveal that the sensitivity of the smart microcapsules to the various external stimuli decreased in the following order: pH > Cl− > H2O > OH−; and three-layered polyelectrolyte (3n) displays the highest sensitivity amongst the studied layer numbers (n). The release profiles were fitted to the Pappas and Weibull's models which describe the release mechanisms. Compatibility of the smart microcapsules with epoxy coating coupled with the anticorrosion effect on Al alloy 2024 substrate were evaluated by means of long-term salt spray and immersion tests.http://www.sciencedirect.com/science/article/pii/S2667266921000050MicrocapsuleSmart anticorrosive coatingSustained releaseInhibitor |
| spellingShingle | Miaomiao Cui Demian I. Njoku Bowen Li Lihui Yang Zuankai Wang Baorong Hou Ying Li Corrosion protection of Aluminium Alloy 2024 through an epoxy coating embedded with smart microcapsules: The responses of smart microcapsules to corrosive entities Corrosion Communications Microcapsule Smart anticorrosive coating Sustained release Inhibitor |
| title | Corrosion protection of Aluminium Alloy 2024 through an epoxy coating embedded with smart microcapsules: The responses of smart microcapsules to corrosive entities |
| title_full | Corrosion protection of Aluminium Alloy 2024 through an epoxy coating embedded with smart microcapsules: The responses of smart microcapsules to corrosive entities |
| title_fullStr | Corrosion protection of Aluminium Alloy 2024 through an epoxy coating embedded with smart microcapsules: The responses of smart microcapsules to corrosive entities |
| title_full_unstemmed | Corrosion protection of Aluminium Alloy 2024 through an epoxy coating embedded with smart microcapsules: The responses of smart microcapsules to corrosive entities |
| title_short | Corrosion protection of Aluminium Alloy 2024 through an epoxy coating embedded with smart microcapsules: The responses of smart microcapsules to corrosive entities |
| title_sort | corrosion protection of aluminium alloy 2024 through an epoxy coating embedded with smart microcapsules the responses of smart microcapsules to corrosive entities |
| topic | Microcapsule Smart anticorrosive coating Sustained release Inhibitor |
| url | http://www.sciencedirect.com/science/article/pii/S2667266921000050 |
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