Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings
Conventional organic coatings often face limitations in providing long-term corrosion protection in aggressive environments. This study introduces a dual-functional polydopamine-25 zinc oxide (PD-Z) composite incorporated into an epoxy (EP) matrix (PD-Z/EP) to enhance the hydrophobicity and corrosio...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier Ltd
2025
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| Online Access: | https://umpir.ump.edu.my/id/eprint/44834/ |
| _version_ | 1848827333039882240 |
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| author | Albarqouni, Yasin M.Y. Nurul Huda, Abu Bakar Thalji, Mohammad R. Arman, Abdullah |
| author_facet | Albarqouni, Yasin M.Y. Nurul Huda, Abu Bakar Thalji, Mohammad R. Arman, Abdullah |
| author_sort | Albarqouni, Yasin M.Y. |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Conventional organic coatings often face limitations in providing long-term corrosion protection in aggressive environments. This study introduces a dual-functional polydopamine-25 zinc oxide (PD-Z) composite incorporated into an epoxy (EP) matrix (PD-Z/EP) to enhance the hydrophobicity and corrosion resistance of aluminum substrates. Characterization analyses confirmed the successful fabrication of the PD-Z composite. Electrochemical measurements, specifically potentiodynamic polarization, are conducted after three days of immersion in a 3.5 wt% NaCl solution, significantly decreasing corrosion current density (Icorr) from 249.4 nA.cm−2 for pure EP to 167 nA.cm−2 for PD-Z/EP. Concurrently, the corrosion rate decreased from 0.004 to 0.0002 mm.y−1. Additionally, electrochemical impedance spectroscopy (EIS) demonstrated a marked increase in the low-frequency impedance modulus (|Z|₀.₀₁ Hz) from 0.07 × 106 Ω.cm2 to 1.2114 × 106 Ω.cm2, indicating superior corrosion inhibition. The exceptional anodic and cathodic protective performance of the PD-Z/EP coating is attributed to the synergistic effects of polydopamine and ZnO, which enhance chloride ion entrapment, hydrophobic barrier properties, and overall corrosion resistance. |
| first_indexed | 2025-11-15T03:59:02Z |
| format | Article |
| id | ump-44834 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T03:59:02Z |
| publishDate | 2025 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-448342025-10-06T07:16:35Z https://umpir.ump.edu.my/id/eprint/44834/ Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings Albarqouni, Yasin M.Y. Nurul Huda, Abu Bakar Thalji, Mohammad R. Arman, Abdullah HD Industries. Land use. Labor TP Chemical technology Conventional organic coatings often face limitations in providing long-term corrosion protection in aggressive environments. This study introduces a dual-functional polydopamine-25 zinc oxide (PD-Z) composite incorporated into an epoxy (EP) matrix (PD-Z/EP) to enhance the hydrophobicity and corrosion resistance of aluminum substrates. Characterization analyses confirmed the successful fabrication of the PD-Z composite. Electrochemical measurements, specifically potentiodynamic polarization, are conducted after three days of immersion in a 3.5 wt% NaCl solution, significantly decreasing corrosion current density (Icorr) from 249.4 nA.cm−2 for pure EP to 167 nA.cm−2 for PD-Z/EP. Concurrently, the corrosion rate decreased from 0.004 to 0.0002 mm.y−1. Additionally, electrochemical impedance spectroscopy (EIS) demonstrated a marked increase in the low-frequency impedance modulus (|Z|₀.₀₁ Hz) from 0.07 × 106 Ω.cm2 to 1.2114 × 106 Ω.cm2, indicating superior corrosion inhibition. The exceptional anodic and cathodic protective performance of the PD-Z/EP coating is attributed to the synergistic effects of polydopamine and ZnO, which enhance chloride ion entrapment, hydrophobic barrier properties, and overall corrosion resistance. Elsevier Ltd 2025 Article PeerReviewed pdf en https://umpir.ump.edu.my/id/eprint/44834/1/1-s2.0-S1004954125002423-main.pdf Albarqouni, Yasin M.Y. and Nurul Huda, Abu Bakar and Thalji, Mohammad R. and Arman, Abdullah (2025) Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings. Chinese Journal of Chemical Engineering, 85. pp. 304-315. ISSN 1004-9541. (Published) https://doi.org/10.1016/j.cjche.2025.05.024 10.1016/j.cjche.2025.05.024 10.1016/j.cjche.2025.05.024 |
| spellingShingle | HD Industries. Land use. Labor TP Chemical technology Albarqouni, Yasin M.Y. Nurul Huda, Abu Bakar Thalji, Mohammad R. Arman, Abdullah Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings |
| title | Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings |
| title_full | Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings |
| title_fullStr | Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings |
| title_full_unstemmed | Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings |
| title_short | Self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings |
| title_sort | self-polymerization of dopamine on zinc oxide nanoparticles for enhanced corrosion resistance in epoxy-aluminum coatings |
| topic | HD Industries. Land use. Labor TP Chemical technology |
| url | https://umpir.ump.edu.my/id/eprint/44834/ https://umpir.ump.edu.my/id/eprint/44834/ https://umpir.ump.edu.my/id/eprint/44834/ |