Grafting of polyaniline onto polydopamine-wrapped carbon nanotubes to enhance corrosion protection properties of epoxy coating

Adhesion-Diffusional-Based Corrosion Protection Mechanisms of Polyaniline-Primed Fluoropolymer Coatings

“…This electrochemical approach not only enhances surface adhesion but also allows for the inclusion of a corrosion-mitigating layer, making it a promising technique for achieving higher coating integrity and overall corrosion protection. , Polyaniline (PANI) and its derivatives are one of the most sought-after conductive polymers owing to their exceptional blend of high electrical conductivity, superior environmental stability, tunability, good processability, diverse synthesis methods, and cost-effectiveness . Recent studies have explored the incorporation of PANI into protective coatings to harness its unique properties for corrosion protection. ,− For instance, Tallman et al demonstrated the capacity of PANI to protect against corrosion through its catalytic capability of forming a passivating oxide layer . Although PANI manifests in various forms contingent on its oxidation level, emeraldine base (EB), its half-oxidized state, can undergo doping or protonation to yield the emeraldine salt (ES) form, recognized as the most conductive PANI state .…”

Flame Retardant and Anticorrosion Behavior of Multifunctional Epoxy Nanocomposite Coatings Containing Graphitic Carbon Nitride/Silanized HfO2 Nanofillers for the Protection of Steel Surface in Automobile Industry

“…Generally speaking, the corrosion protection of coatings on steel surfaces can be described by the width of peeling at the scratch during salt spray tests. , Figure a–f shows a photographic image of the effect of corrosion protection capabilities on mild steel coated with pure EP, EP-HfO 2 , EP-TMSPETA/HfO 2 , EP-GCN/HfO 2 , and EP-GCN/TMSPETA-HfO 2 after 320 h of exposure to saltwater, respectively. The photographs unmistakably demonstrated the variations in corrosion protection capabilities of coatings on mild steel substrates.…”

Effects of Nanoadditives on the Anticorrosion Performance of Nanocomposite Coatings: A Review

“…88 ) can be prepared by using dopamine to undergo a selfpolymerization reaction on the surface of CNTs and allowing PDA to graft PANI onto the surface of CNTs. 89 After 50 days of immersion in a 3.5 wt % NaCl solution, the low-frequency impedance of a CNTs−PDA−PANI/EP coating is still as high as 1.19 × 10 10 Ω•cm 2 (Figure 6e 2 ), which is about 2 orders of magnitude higher than that of the pure epoxy coating. Ionic liquids (ILs) can also be used to modify the CNTs.…”

“…The log | Z | 10 mHz value of the composite coating of the MWC.Thp.Mo hybrid and epoxy resin is 10.78 (Figure d 1 ), which displays significant improvement in the barrier resistance (EP coating: log | Z | 10 mHz = 9.46). CNTs–PDA–PANI nanocomposites (Figure e 1 ) can be prepared by using dopamine to undergo a self-polymerization reaction on the surface of CNTs and allowing PDA to graft PANI onto the surface of CNTs . After 50 days of immersion in a 3.5 wt % NaCl solution, the low-frequency impedance of a CNTs–PDA–PANI/EP coating is still as high as 1.19 × 10 10 Ω·cm 2 (Figure e 2 ), which is about 2 orders of magnitude higher than that of the pure epoxy coating.…”