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

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