In-vitro corrosion performance of hydroxyapatite-coated Al2024 in simulated body fluid: A comparative study

Authors : Mehmet TOPUZ, Burak DİKİCİ

Pages : 926-934

Doi:10.28948/ngumuh.1263697

View : 93 | Download : 88

Publication Date : 2023-07-15

Article Type : Research Paper

Abstract :In this study, the applicability of hydroxyapatite insert ignore into journalissuearticles values(HA); coatings on Al-Cu-Mg alloys insert ignore into journalissuearticles values(Al2024); was investigated by electrochemical techniques. The structural characterizations of the coated layers were investigated by SEM, EDS, and XRD equipment. The surface adhesion resistance and electrochemical degradation behavior were tested by scratch and potentiodynamic scanning insert ignore into journalissuearticles values(PDS); tests, respectively. It was observed that the HA coating had a homogeneous structure on the Al2024 surfaces, but some local areas could not be adequately coated with HA from the cross-section images. Also, the coating surfaces were microporous morphology, which is specific to the HA coatings. From the scratch test results of the coating, it was predicted that the critical load resistance insert ignore into journalissuearticles values(Lc1);, 12N, would be sufficient for biomedical applications. Electrochemical corrosion tests revealed that HA coating decreased the corrosion current density insert ignore into journalissuearticles values(Icorr); and corrosion rate of the Al2024 alloy insert ignore into journalissuearticles values(0.885 and 5.260 µA·cm-2 for HA-coated and uncoated Al2024 alloy, respectively);. However, despite the low Icorr value obtained with HA coating, it was observed that both Icorr and passivation current density insert ignore into journalissuearticles values(Ipass); values insert ignore into journalissuearticles values(3.15 µA·cm-2 for HA coating, 0.03 to 0.08 µA·cm-2 for different types of titanium alloys); were insufficient when compared to commercial titanium alloys.
Keywords : Al2024, Hidroksiapatit, Simule edilmiş vücut sıvısı, Sol jel kaplama