Hydroxyapatite-reinforced chitosan film on PEO-treated aluminum alloys for enhanced corrosion resistance
Corrosion of aluminum alloys is a critical limitation in marine and engineering environments, necessitating multifunctional protective coatings. This study aimed to enhance corrosion resistance by incorporating hydroxyapatite (HAP) nanoparticles into chitosan (CS) films deposited on plasma electroly...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-05-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425009810 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850140655445082112 |
|---|---|
| author | Yang Li Shuyan Yang Yong Wan |
| author_facet | Yang Li Shuyan Yang Yong Wan |
| author_sort | Yang Li |
| collection | DOAJ |
| description | Corrosion of aluminum alloys is a critical limitation in marine and engineering environments, necessitating multifunctional protective coatings. This study aimed to enhance corrosion resistance by incorporating hydroxyapatite (HAP) nanoparticles into chitosan (CS) films deposited on plasma electrolytic oxidation (PEO)-treated aluminum surfaces. The composite coatings were constructed by depositing HAP-reinforced chitosan films onto PEO-pretreated aluminum alloy via a dipping–pulling process. Comprehensive characterization—including spectroscopic, microscopic, electrochemical, and computational techniques such as FTIR and molecular dynamics (MD) simulations—was conducted to evaluate their structure and performance. Results show that HAP enhances hydrogen bonding with CS, forming a denser molecular network that seals micro-pores in the PEO layer. The modified coatings exhibited markedly improved properties, with surface hardness increasing from 203.7 MPa to 509.5 MPa and elastic modulus from 6.6 GPa to 17.8 GPa. Electrochemical tests revealed a reduction in corrosion current density (jcorr) from 1.12 × 10−7 to 5.26 × 10−9 A/cm2, along with a significant increase in polarization resistance (Rp) to 1.74 × 1010 Ω cm2. These findings demonstrate that HAP-reinforced CS films can significantly improve both the mechanical robustness and corrosion protection of PEO coatings on aluminum alloys. |
| format | Article |
| id | doaj-art-2ff40f5dd53b4167bb8d5f4ff748fa46 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-2ff40f5dd53b4167bb8d5f4ff748fa462025-08-20T02:29:43ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01365911592410.1016/j.jmrt.2025.04.160Hydroxyapatite-reinforced chitosan film on PEO-treated aluminum alloys for enhanced corrosion resistanceYang Li0Shuyan Yang1Yong Wan2School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR ChinaSchool of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; Corresponding author.School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China; Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Lanzhou, 730000, PR China; Corresponding author. School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China.Corrosion of aluminum alloys is a critical limitation in marine and engineering environments, necessitating multifunctional protective coatings. This study aimed to enhance corrosion resistance by incorporating hydroxyapatite (HAP) nanoparticles into chitosan (CS) films deposited on plasma electrolytic oxidation (PEO)-treated aluminum surfaces. The composite coatings were constructed by depositing HAP-reinforced chitosan films onto PEO-pretreated aluminum alloy via a dipping–pulling process. Comprehensive characterization—including spectroscopic, microscopic, electrochemical, and computational techniques such as FTIR and molecular dynamics (MD) simulations—was conducted to evaluate their structure and performance. Results show that HAP enhances hydrogen bonding with CS, forming a denser molecular network that seals micro-pores in the PEO layer. The modified coatings exhibited markedly improved properties, with surface hardness increasing from 203.7 MPa to 509.5 MPa and elastic modulus from 6.6 GPa to 17.8 GPa. Electrochemical tests revealed a reduction in corrosion current density (jcorr) from 1.12 × 10−7 to 5.26 × 10−9 A/cm2, along with a significant increase in polarization resistance (Rp) to 1.74 × 1010 Ω cm2. These findings demonstrate that HAP-reinforced CS films can significantly improve both the mechanical robustness and corrosion protection of PEO coatings on aluminum alloys.http://www.sciencedirect.com/science/article/pii/S2238785425009810Plasma electrolytic oxidationHydroxyapatiteChitosan filmsMicrostructureMechanical propertiesCorrosion resistance |
| spellingShingle | Yang Li Shuyan Yang Yong Wan Hydroxyapatite-reinforced chitosan film on PEO-treated aluminum alloys for enhanced corrosion resistance Journal of Materials Research and Technology Plasma electrolytic oxidation Hydroxyapatite Chitosan films Microstructure Mechanical properties Corrosion resistance |
| title | Hydroxyapatite-reinforced chitosan film on PEO-treated aluminum alloys for enhanced corrosion resistance |
| title_full | Hydroxyapatite-reinforced chitosan film on PEO-treated aluminum alloys for enhanced corrosion resistance |
| title_fullStr | Hydroxyapatite-reinforced chitosan film on PEO-treated aluminum alloys for enhanced corrosion resistance |
| title_full_unstemmed | Hydroxyapatite-reinforced chitosan film on PEO-treated aluminum alloys for enhanced corrosion resistance |
| title_short | Hydroxyapatite-reinforced chitosan film on PEO-treated aluminum alloys for enhanced corrosion resistance |
| title_sort | hydroxyapatite reinforced chitosan film on peo treated aluminum alloys for enhanced corrosion resistance |
| topic | Plasma electrolytic oxidation Hydroxyapatite Chitosan films Microstructure Mechanical properties Corrosion resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425009810 |
| work_keys_str_mv | AT yangli hydroxyapatitereinforcedchitosanfilmonpeotreatedaluminumalloysforenhancedcorrosionresistance AT shuyanyang hydroxyapatitereinforcedchitosanfilmonpeotreatedaluminumalloysforenhancedcorrosionresistance AT yongwan hydroxyapatitereinforcedchitosanfilmonpeotreatedaluminumalloysforenhancedcorrosionresistance |