Deposition of Self-Assembled Monolayer on Vanadate Conversion Coated AZ31 Mg Alloy

Abstract:

Self-assembled monolayer (SAM) was adsorbed on the surface of vanadate conversion coated AZ31 magnesium alloy. The SAM thin film was deposited using (Tridecafluoro-1, 1, 2, 2-tetrahydrooctyl) trimethoxysilane (FAS13) and Tetrakis (trimethylsiloxy) titanium as a catalyst. Contact angles measurement, SEM, XRD, EDS and XPS were employed to analyze the surface morphologies, molecular composition, phase structure and wettability of the coatings formed on Mg alloy substrate. Corrosion resistance property of the coatings was also examined using the anodic polarization method and salt spray test. The anticorrosion property was improved with SAM post treatment. Furthermore, the contact angle increases from 12 deg. to 165 deg. indicating to production of super hydrophobic surface with SAM post treatment.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 1482-1487
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.1482
• Online since: May 2014
• Authors: S.A. Salman, N. Akira, Kensuke Kuroda, Masazumi Okido
• Keywords: Contact Angle, Conversion Coating, Corrosion, Magnesium Alloy, SAM

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