Preparation of superhydrophobic films on copper substrate for corrosion protection

• Published in: Surface & coatings technology 2014-04, Vol.244, p.1-8
• Main Authors: Fan, Youhua, Chen, Zejun, Liang, Jin, Wang, Yong, Chen, Hong
• Format: Article
• Language: English
• Subjects: ACETATES; Anticorrosion; Applied sciences; Contact angle; Copper; COPPER (PURE); CORROSION; Corrosion environments; Corrosion prevention; CORROSION PROTECTION; Cross-disciplinary physics: materials science; rheology; CuO; EIS; Electrochemical impedance spectroscopy; Exact sciences and technology; Materials science; Metals. Metallurgy; MICROSTRUCTURES; Morphology; Nanostructure; Physics; Scanning electron microscopy; SODIUM CHLORIDE; Superhydrophobicity; Surface treatments; X RAY SPECTROSCOPY; X-ray photoelectron spectroscopy
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2014.01.005

The carambola-like CuO film on copper substrate was hydrothermally synthesized using copper acetate and hexamethylenetetramine solutions at 90°C. The CuO particles, which were composed of nanopetals with a thickness of 80 to 120nm, had a shape similar to a carambola of 600nm in width and 800nm in lengths. The CuO film was endowed with superhydrophobic property by modifying with stearic acid (STA), which was referred to the STA-modified CuO film. The morphologies and chemical composition of the CuO film were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and means of water contact angle (WCA). The WCA of the STA-modified CuO film was measured to be as high as 157°. The corrosion resistance ability and durance property of the STA-modified CuO film in a 3.5wt.% sodium chloride solution was evaluated by electrochemical impedance spectroscopy (EIS). Moreover, the anticorrosion properties of the STA-modified CuO film were compared with the unmodified pure copper substrate. •The carambola-like CuO film on copper substrate was hydrothermally synthesized.•The CuO film was endowed with superhydrophobic property via modified by stearic acid (STA).•The anticorrosion property of the STA-modified CuO film in 3.5wt.% NaCl solution was evaluated by EIS.•The improved corrosion resistance of the copper substrate was expected to satisfy the practical applications.