Abstract
In the present study, the epoxy coating adhesion and adsorption on the carbon steel surface treated by a high free energy nano-porous film based on europium (Eu) oxide were estimated using different analyses. Furthermore, the Eu2O3 film impact on the steel@Eu-oxide/epoxy anti-corrosion properties, performance, and cathodic disbondment resistance was investigated. By atomic force microscopy (AFM) analysis, the steel@Eu-oxide roughness, and through the FE-SEM method, the deposited film homogeneity/uniformity degrees were examined. The uniform coverage of the steel surface by a nanostructured Eu-oxide film led to the free energy (γs) improvement up to 30%. The EIS outcomes indicated a significant increase (about 57%) in the scratched coating corrosion resistance against saline attack in the case of the Eu-treated sample. The cathodic delamination test results displayed about 58% improvement of the epoxy resistance against cathodic disbondment. The simulation outcomes strongly affirmed the strengthened coating dry/wet adsorption on the europium oxide adsorbents compared with iron oxides.
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