Peer-Reviewed Journal Details
Mandatory Fields
Treacy, GM;Breslin, CB
1998
January
Electrochimica Acta
Electrochemical studies on single-crystal aluminium surfaces
Published
34 ()
Optional Fields
PITTING RESISTANCE HALIDE SOLUTIONS ADSORPTION OXYGEN FACES
43
1715
1720
The electrochemical behaviour of single-crystal aluminium oriented in the (111), (110) and (100) directions in chloride-and indium-containing solutions was studied. It was found that the susceptibility of the single crystals to the onset of pitting attack in the chloride solution varied in the order (111)>(110)>(100). This was evident from pitting potential and induction time data, where the most noble pitting potential values and the longest induction periods were recorded for the (100) surface. This was explained in terms of differences in the surface energy of (111), (110) and (100) planes. It was also found that cathodic reduction reactions (hydrogen evolution and oxygen reduction reactions) proceeded at a greater rate on the (100) surface. In addition, the time delay between the addition of indium ions to solution and the onset of activation of the immersed electrode by the indium species was shorter for the (100) surface. This was attributed to the more efficient incorporation of indium into the (100) lattice. (C) 1998 Elsevier Science Ltd. All rights reserved.
OXFORD
0013-4686
Grant Details