Corrosion Resistance of Silane-Modified Hydroxide Zinc Carbonate Film on AZ31 Magnesium Alloy

• Published in: Acta metallurgica sinica : English letters 2015-03, Vol.28 (3), p.373-380
• Main Authors: Zeng, Rong-Chang, Liu, Li-Jun, Pang, Ting-Ting, Zhang, Fen, Zhang, Wei-Wei, Li, Shuo-Qi, Cui, Hong-Zhi, Han, En-Hou
• Format: Article
• Language: English
• Subjects: Aqueous solutions; AZ31镁合金; Carbonates; Characterization and Evaluation of Materials; Chemical vapor deposition; Chemistry and Materials Science; Contact angle; Corrosion and Coatings; Corrosion resistance; Corrosion resistant alloys; Deposition; Electrodes; Fourier transforms; Fourier变换; FTIR spectrometers; Hydrophobic surfaces; Hydrophobicity; Hydroxides; Infrared analysis; Infrared spectrometers; Magnesium alloys; Magnesium base alloys; Materials Science; Metallic Materials; Nanotechnology; Organometallic Chemistry; Protective coatings; Spectroscopy/Spectrometry; Spectrum analysis; Tribology; Ureas; Zinc; 扫描电子显微镜; 氢氧化锌; 疏水性膜; 硅烷改性; 碳酸酯; 耐蚀性
• ISSN: 1006-7191; 2194-1289
• DOI: 10.1007/s40195-015-0208-x

The corrosion resistance of magnesium alloys can be improved using functional surface modification such as hydrophobic treatment.In this study,a hierarchical hydroxide zinc carbonate（HZC） film was fabricated on AZ31 magnesium alloy via a simple chemical-bath deposition process using urea aqueous solution.The morphologies,compositions and corrosion resistance of the hydrophobic film were analyzed using scanning electron microscopy,X-ray diffraction and Fourier transform infrared spectrometer,and electrochemical measurements as well.The results revealed that the HZC film displayed flower-like protrusions and had a thickness of approximately 100 um.The fluoroalkylsilane（FAS）-modified HZC film exhibited a hydrophobic property with a water contact angle of 131.3°.The FAS/HZC film significantly improved the corrosion resistance of the AZ31 alloy due to hierarchical structures and hydrophobic modification.