Metal sheet that selectively absorbs solar radiation

Details Metal sheet that selectively absorbs solar radiation Metal sheet that selectively absorbs solar radiation

1984-10-03

1986-04-01

O'Keefe, Veronica

Metal treatment

Compositions

Heat treating

148 621, 428623, C23F 502, C23F 700

Patent

active

045796068

ABSTRACT:
In order to obtain a film having a low electric resistance and a good selective absorption property of solar radiation, good rust proofing and good weldability, a stainless steel is dipped in a chemical conversion bath, in which sodium bichromate or potassium bichromate is mixed with sulfuric acid at a predetermined proportion to one another, in accordance with the method of the present invention. The product film of the present invention comprises metal oxides or metal hydroxides with metal (Fe+Cr) finely dispersed therein.

REFERENCES:
patent: 4026737 (1977-05-01), Tekahari et al.
patent: 4097311 (1978-06-01), Ishibashi et al.
patent: 4491487 (1985-01-01), Mizunuma et al.

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