The potential of UV lasers for prebonding treatment of Al-2024 alloy was proved in a previous investigation 1 with a modified epoxy adhesive. Surface treatment of Al by excimer laser results in oxidation and morphological changes of the surface promoting high shear adhesion strength at optimal laser conditions. The objective of this research is to establish the effect of excimer ArF UV laser on the Al alloy surface microstructure and chemical activity and its correlation with the macro behaviour of shear and peel strength and failure locus of adhesively bonded joints using structural adhesives for structural and repair applications. The first stage of this research (0001 of the contract) is summarized in this report. This stage includes the preparation of all Al specimens with required configurations for the various tests.