Effect of surface pre-treatment on surface characteristics and adhesive bond strength of aluminium alloy
| Autor: | K.K. Athira, K. Leena, S. Suraj, S. Bhuvaneswari, V. Lakshmana Rao |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering 02 engineering and technology Surface finish Surface Roughness Durability Biomaterials Contact angle 03 medical and health sciences 0302 clinical medicine Surface roughness Aluminium alloy Surface Energy Atomic Force Microscopy C Composite material Resin Bond strength Wettability D 030206 dentistry 021001 nanoscience & nanotechnology Roughness Surface energy visual_art visual_art.visual_art_medium Joints Wetting Adhesive 0210 nano-technology |
| Zdroj: | International Journal of Adhesion and Adhesives. 70:265-270 |
| ISSN: | 0143-7496 |
| DOI: | 10.1016/j.ijadhadh.2016.07.012 |
| Popis: | In this work aluminium alloy surfaces have been subjected to three different methods of surface pre-treatments such as solvent degreasing, FPL (Forest Products Laboratory) etching and priming using an epoxy based primer. The treated surfaces were evaluated for surface energy, contact angle, surface topography, surface roughness and adhesive strength characteristics. The influence of surface pre-treatments on the variation of polar, dispersive and total surface energy of the surfaces is addressed. A wettability test was performed on the surfaces using an epoxy adhesive in order to assess the influence of the pre-treatment techniques on substrate/adhesive interaction. Theoretical work of adhesion values for the various pre-treated surfaces were calculated using the contact angle data and further tested experimentally by adhesive bond strength evaluation by tensile testing of a single lap aluminium-epoxy aluminium assembly. The method of surface pre-treatment showed a profound effect on the surface topography and roughness by AFM. This study reveals that a combination of high surface energy and high surface roughness of the substrate along with good wettability of the adhesive contributed to the highest joint strength for the aluminium alloy through the FPL etching pre-treatment. (C) 2016 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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