Corrosion resistance of high-level-hydrophobic layers in combination with Vitamin E – (α-tocopherol) as green inhibitor. (August 2015)

• Record Type: Journal Article
• Authors: Fuchs-Godec, Regina; Zerjav, Gregor
• Is Part Of: Corrosion science. Volume 97(2015)
• Page Start: 7
• Page End: 16
• Publication Date: 2015-08
• Subjects: A. Copper -- A. Organic coatings -- B. SEM -- B. EIS -- B. Polarization -- C. Acid inhibition; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2015.03.016
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract : Graphical abstract: Highlights: A high-level hydrophobic layer on Cu and Cu40Zn samples is achieved using immersion method. The corrosion protection of the as-prepared hydrophobic layer was improved greatly with addition of Vitamin E. Vitamin E was used as a type of green inhibitor. Such a layer is denser, more compact with higher hydrophobicity when compared with a layer without the addition of Vitamin E. Abstract: Modifications of Cu and Cu40Zn surfaces were achieved by their immersions in ethanol solutions of stearic acid with and without the additions of Vitamin E. The surface morphologies, wettability, and corrosion resistance were characterised by means of SEM, water contact-angle, potentiodynamic measurements and EIS. The corrosive media was artificially prepared acid rain at 25 °C. Significant increase in the contact angle indicated that the biomimetic morphology effectively repelled water from the metal surface. Electrochemical measurements indicated that Vitamin E additionally improved the inhibitory properties of the as-prepared hydrophobic layer against corrosion. The inhibitive effectiveness increased to more than 99%.