Electrolytic coloring of anodic aluminum for selective solar absorbing films: use of additives promoting color depth and rate

M.f Shaffei, S.s Abd El-Rehim, N.a Shaaban and H.s Huisen

Renewable Energy, 2001, vol. 23, issue 3, 489-495

Abstract: An optically black coating on aluminum substrate having improved solar absorption is disclosed along with an enhanced process for formation. The two-step electrolytic coloring process has been used. Porous anodic films have been formed by dc anodization of aluminum samples in 16% sulfuric acid. It is followed by black coloration via ac electrolysis in nickel sulfate solution. In this step, we have investigated the effect of chloride and magnesium as additives. Evaluation of the test samples has been carried out by spectral reflectance and nickel content measurements. Choride existance verifies two aspects: the promotion of the coloring process and higher black tones shades are attained. However, magnesium has a minor effect.

Date: 2001
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148100001294
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:23:y:2001:i:3:p:489-495

DOI: 10.1016/S0960-1481(00)00129-4

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().