Add time:08/01/2019         Source:sciencedirect.com

Marine corrosion and biofouling on metallic materials are sticky problems. Herein, we prepared hierarchical structured superhydrophobic (SHPB) surfaces via a versatile one step electrodeposition approach. The synthetic SHPB surface was employed as an efficient barrier against corrosion and Chlorella vulgaris-induced biofouling. The surface morphology and chemical compositions were analyzed using scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrophotometer (FTIR) and Energy-dispersive spectrum (EDS). Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and immersion test in Chlorella vulgaris-inoculated culture medium were carried out to evaluate the anti-corrosion and anti-biofouling performance of the obtained SHPB surface. The results demonstrated that the synthetic SHPB surface exhibits great enhanced corrosion resistance and biofouling mitigation. Moreover, the as-fabricated SHPB surfaces retain superhydrophobicity in wicked environment such as strong acid and alkali conditions, showing good chemical stability. We believe that the SHPB surfaces over metallic substrates provide a potential and worthful strategy for marine corrosion and biofouling.

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