Abstract
In this study, the LDHs film was successfully prepared in-situ on the surface of AAO substrate. By using SEM, EDS, XRD, Vickers microhardness tester, pull-off tester, electrochemical workstation and tribometer, the morphology, composition, crystal structure, hardness, binding force, corrosion resistance and tribological performance of the LDHs film produced within a range of pH values (6.5/7.5/8.5/9.5) were researched. The results revealed that the pH of solution is important in the formation of Zn-Al-LDHs film and their characteristics: when the pH of 8.5, the LDHs film surface is the most smooth and flat, the crystal structure of LDHs nanosheets is the most complete and grows perpendicular to the substrate surface, the thickness of the film reaches to about 96.77 μm, and the interfacial bonding force achieves to about 8.50 MPa. The LDHs film could effectively enhance the corrosion resistance by sealed the anodic aluminum oxide film, and the dry friction coefficient of alumina substrate decreases to about 0.2 for 3600 s, which exhibits excellent tribological properties.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
