Abstract
Organic coatings are widely used to protect metals from corrosion. However, they still have several disadvantages; for example, they are single function, age, and have a complex preparation strategy and limited application possibilities. Here, we incorporated modified CeO 2 nanoflakes (VTEO-CeO 2 ) into an epoxy matrix and thus developed a simultaneous anti-corrosion and ultraviolet (UV) aging resistant composite coating. The corrosion resistance was investigated using electrochemical impedance spectroscopy and salt spray tests. The results demonstrated that incorporating VTEO-CeO 2 nanoflakes improved the anticorrosive properties of the coatings. The composite coating with 1 wt% VTEO-CeO 2 had the largest system resistance ( R t ) value (2.96 ×10^5 ohm·cm 2 ) and the highest impedance modulus (|Z| 0.01 Hz ) after 240 h 3.5 wt% NaCl solution exposure; this was attributed to the inhibitory effect of the Ce-rich passive layer and the barrier effect of nanoflakes. Analysis of the effectiveness of the CeO 2 nanoflakes as UV absorbing agents was conducted using Fourier transform infrared spectroscopy and fluorescence emission spectra. After 240 h of UV aging, 1 wt% CeO 2 /epoxy and VTEO-CeO 2 /epoxy coatings have less change in the structural indices ( I C ˭O ), and this indicates better UV aging resistance. This work could facilitate the development of epoxy coatings that provide long-term protection and extend the application of rare earth elements in functional composite coatings.
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
