ADHESION CHARACTERISTICS ON ANODIZED TITANIUM AND ITS DURABILITY UNDER AGGRESSIVE ENVIRONMENTS

Sabbir Ahmed, Debabrata Chakrabarty, Subroto Mukherjee and Shantanu Bhowmik
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Sabbir Ahmed: Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, West Bengal, India
Debabrata Chakrabarty: Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, West Bengal, India
Subroto Mukherjee: #x2020;Facilitation Centre for Industrial Plasma Technologies, Institute for Plasma Research, A-10/B G.I.D.C. Electronics Estate, Sector 25, Gandhinagar 382044, Gujarat, India
Shantanu Bhowmik: #x2021;Department of Aerospace Engineering, Amrita University, Coimbatore 641112, Tamil Nadu, India§Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands

Surface Review and Letters (SRL), 2016, vol. 23, issue 05, 1-12

Abstract: In this investigation, an attempt has been made to improve the interfacial adhesion characteristics of titanium (Ti) surface at elevated temperature and in aqueous salt solution. In order to ensure the presence of titanium oxide coating on the surface of titanium, anodization on titanium was carried out by sodium hydroxide. This oxide coating etches the surfaces of titanium. These etching surfaces of titanium increase the surface energy and surface roughness of the titanium. Physicochemical characteristics of surface modified titanium were carried out by X-ray photoelectron spectroscopy (XPS) study and the results reveal that there is a significant increase in oxygen functionalities due to anodization. The oxide etching on the surface of anodized titanium is further confirmed by scanning electron microscopy (SEM) study. The contact angle and surface energy are measured by the use of two liquids namely water and glycerol. It is observed that the formation of oxide not only improves the surface energy of titanium but also protects the surface of titanium when exposed to aggressive environments. The lap-shear tensile strengths of two anodized titanium surfaces were fabricated by adhesive. There has been significant improvement in the adhesive bond strength, and subsequently in the durability of adhesive bonded joint, of titanium when exposed to aggressive environments.

Keywords: Titanium alloy; sodium hydroxide anodization; XPS; AFM; adhesive bonding; tensile strength (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1142/S0218625X16500335

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