Abstract
In harsh marine environments, the long-term protection performance of organic coatings is not ideal. Based on this, a strategy for constructing a triple-functional nano-pigment was proposed. Zinc oxide (ZnO) grown on boron nitride (BN) with polydopamine (PDA) as an interface layer (PDA-BN@ZnO nano-pigment) was prepared. This strategy not only avoided the accumulation of BN but also improved the interface compatibility between nano-pigment and silicon-epoxy resin. Characterization analyses validated that ZnO had been successfully grown onto PDA-modified BN nanosheets. Polarisation curves obtained in the solution phase showed that compared with the Al-alloy immersed in pure 3.5 wt% NaCl solution, the introduction of PDA-BN@ZnO caused icorr to decrease from 2.11 × 10−5 A/cm2 to 9.47 × 10−9 A/cm2. Combined with the significant enhancement of the low-frequency impedance modulus (|Z|0.01 Hz) of the scratched PDA-BN@ZnO/SE coatings, the effective corrosion inhibition of the prepared nano-pigment was demonstrated. In addition, |Z|0.01Hz of PDA-BN@ZnO/SE composite coating after immersion for 60 days was as high as 1010 Ω·cm2 with only about 0.3 orders of magnitude lower than the initial value. The excellent protective properties of the composite coating were due to the synergistic effects of improved barrier properties, chloride ion retention and corrosion inhibition.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
