An investigation on the optimization of electrochemically pigmented aluminum oxide collector coatings
Date
1997-03Source Title
Renewable Energy
Print ISSN
0960-1481
Publisher
Elsevier
Volume
10
Issue
2/3
Pages
203 - 206
Language
English
Type
ArticleItem Usage Stats
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Abstract
In order to produce selective coatings on aluminium substrates to be used as absorber plates
in high efficiency solar collectors, nickel pigmentation has been applied to anodically oxidized
surfaces. Optical and structural properties of electrochemically formed aluminium oxide films as
function of electrolysis conditions such as, applied current, pH, temperature and concentration
of metal ions have been examined using electron spectroscopy and scanning electron
microscopy. The optimisation of the absorptivity/emissivity ratio of the surfaces in terms of
preparation conditions is described. Nickel pigmentation of porous aluminum surfaces was also
investigated as a function of electrochemical pigmentation conditions. Mechanisms contributing
to selectivity in anodically produced oxides and electrodeposits are discussed. Copyright © 1996 Published by Elsevier Science Ltd.