Abstract
A SiC nanoparticles reinforced ceramic composite coating (SiCp/MAO) was successfully prepared on the YAl2 particles reinforced Mg-Li based composite using micro-arc oxidation. The phase composition and morphology of coatings were characterized by XRD, EDS, SEM and 3D laser scanning microscope. The corrosion behavior of coatings in a 3.5 wt% NaCl solution was evaluated by immersion test, potentiodynamic polarization and electrochemical impedance spectroscopy. With the increasing of SiC nanoparticles amount, the surface morphology of the composite coating was more compact and uniform with the reduction of pore diameter and micro-cracks. Meanwhile, the thickness and surface roughness of the composite coating were decreased. Both immersion and electrochemical tests showed that the 2g/L SiCp/MAO composite coating had the lowest corrosion rate, which proved that the addition of SiC nanoparticles improves the corrosion resistance of the composite coating.
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
