Synergistic effect of graphene oxide and cathodic protection to enhance the long-term protective performance of organic coatings
Source abstract
Abstract
Graphite oxide (GO)-based organic coating and cathodic protection are effective methods for improving the service life of metals in the marine environment. However, few kinds of researches focus on long-term protective performance for coatings combined with cathodic protection potential and GO doping. In this work, the protective effects of epoxy (EP) coatings with different charge characteristics of GO addition and cathodic protection potential were compared and analyzed, and it is proposed that the accumulation of negative charges in cathodic protection would further enhance the electrostatic repulsive force of negatively charged GO against corrosive media. The long-term protective properties are systematically analyzed by EIS, Cl− diffusion analysis, and corrosion product observation. The GO/EP composite coating combined with − 1.2 V (vs. SCE) negative cathodic protection potential performed the biggest capacitance arc radius, the lowest Cl− diffusion coefficient, and no corrosion trace. The low-frequency impedance value increased from 1.5 × 108 Ω·cm2 to 3 × 108 Ω·cm2 in 60 days test period. In addition, the corrosion inhibition mechanism of the synergistic of GO nanosheet and negative cathodic protection potential on EP coating was revealed. This research result performs important reference significance for the application of GO material in the field of marine anti-corrosion engineering.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Concrete Corrosion and Durability · Fuel Cells and Related Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
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