On the synergistic corrosion inhibition and polymer healing effects of polyolefin coatings modified with Ce-loaded hydroxyapatite particles applied on steel
| Author | Raj, Roma |
| Author | Taryba, M.G. |
| Author | Morozov, Y. |
| Author | Kahraman, R. |
| Author | Shakoor, R.A. |
| Author | Montemor, M.F. |
| Available date | 2022-10-05T07:23:05Z |
| Publication Date | 2021 |
| Publication Name | Electrochimica Acta |
| Resource | Scopus |
| Abstract | pH-sensitive hydroxyapatite particles were loaded with cerium ions (Ce-HAP) and incorporated into polyolefin coatings applied on carbon steel. The Ce-modified hydroxyapatite particles were characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM/EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The protective performance of modified and reference polyolefin coatings applied on carbon steel was studied by electrochemical impedance spectroscopy (EIS), and the self-healing capability was evidenced by combining the scanning vibrating electrode technique (SVET) and pH micro-potentiometry with video-imaging, SEM and Raman. The modified coatings showed significantly improved long-term corrosion protection compared to reference coatings. The effect was attributed to the synergistic combination of the corrosion inhibition effect of cerium ions loaded in the HAP particles and polyolefin healing capability. |
| Sponsor | This publication was made possible by NPRP11S-1226–170132 from Qatar National Research Fund (a member of the Qatar Foundation). The authors from Centro de Química Estrutural acknowledge the financial support of Fundação para a Ciência e Tecnologia (UIDB/00100/2020 and UIDP/00100/2020). Statements made herein are solely the responsibility of the authors. The authors acknowledge Dow Chemical Company (Dr. Bernhard Kainz, Global Application Development Leader Metal Packaging Coatings, Dow Coating Materials) for providing polyolefin CANVERA 1110 coating formulation; Voestalpine AG for providing carbon steel; Dr. Marta Alves (Instituto Superior Técnico) for conducting the XRD tests; Prof. Ana Clara Marques for valuable discussions; Mário Vale (Instituto Superior Técnico) for performing TG/DTG studies; Ana Mafalda Macatrão for helping with RAMAN characterization. Pedro Prazeres (PARALAB) for help with SEM visualization of self-healing; Mario Dias (LAIST, Técnico Lisboa) for determination of cerium, nitrate and total nitrogen contents in Ce-HAP particles. |
| Language | en |
| Publisher | Elsevier Ltd |
| Subject | Cerium Coating Corrosion Hydroxyapatite Polyolefin Self-healing |
| Type | Article |
| Volume Number | 388 |
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