Enhanced protective nanoparticle-modified MgAl-LDHs coatings on titanium alloy

MgAl LDHs (layered double hydroxides) coatings were deposited on the surface of titanium alloy Ti10V2Fe3Al, accompanied by modification with ZrO2 and MoS2 nanoparticles through electrophoretic deposition. FE-SEM, XRD and EDS measurements were used to investigate the microstructure and composition of the composite coatings. Corrosion resistance was measured by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution. The LDHs/MoS2 composite coating exhibited the best corrosion resistance. Ball on disc tests was implemented to obtain morphology, the friction coefficient and wear loss of the worn surfaces. The LDHs/ZrO2 composite coating exhibited the best wear resistance. A mechanism for enhancing the wear-resistance of the different nanoparticles-modified MgAl-LDHs coatings was proposed. •Both the LDHs/ZrO2 and LDHs/MoS2 composite coatings protected the substrate from wear.•LDHs coating and nanoparticles had a synergistic effect on anti-wear performance.•The LDHs/MoS2 and LDHs/ZrO2 composite coatings exhibited the best corrosion resistance and wear resistance, respectively.