Chemistry: electrical and wave energy – Processes and products
Patent
1982-04-09
1983-08-09
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 35N, 126901, C25D 544
Patent
active
043977162
ABSTRACT:
A process for providing a thermal control solar stable surface coating for aluminum surfaces adapted to be exposed to solar radiation wherein selected values within the range of 0.10 to 0.72 thermal emittance (.epsilon..sub.T) and 0.2 to 0.4 solar absorptance (.alpha..sub.s) are reproducibly obtained by anodizing the surface area in a chromic acid solution for a selected period of time. The rate, voltage and time, along with the parameters of initial .epsilon..sub.T and .alpha..sub.s, temperature of the chromic acid solution, acid concentration of the solution and the material anodized determines the final values of .epsilon..sub.T and .alpha..sub.s.
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Duckett Roy J.
Gilliland Charles S.
Kaplan G. L.
Manning John R.
Nelson Wallace J.
Nguyen Nam X.
Osborn Howard J.
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