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Chemical Engineering Journal
Vol. 306, 2016, Pages: 441–451

Biomimetic one step fabrication of manganese stearate superhydrophobic surface as an efficient barrier against marine corrosion and Chlorella vulgaris-induced biofouling

Binbin Zhang, Jiarun Li, Xia Zhao, Xiuhua Hu, Lihui Yang, Ning Wang, Yantao Li, Baorong Hou

Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, PR China.

Abstract

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.

Graphical abstract

Keywords: Superhydrophobic surface; Marine corrosion; Biofouling; Electrodeposition.

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