Selective black coating for aluminum

Details Selective black coating for aluminum Selective black coating for aluminum

1975-03-03

1976-07-27

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

427372, 427160, C23F 706

Patent

active

039716740

ABSTRACT:
A selective black coating on aluminum is provided which is characterized by a high absorptivity in the visible and near infrared regions of the spectrum (0.38 to 1.9 microns) and a low emissivity for radiation of longer-(infrared)-wavelength (greater than 6 microns). The black or near black coating is applied by immersing the aluminum in a bath containing soluble borate and silicate salts.

REFERENCES:
patent: 1846844 (1932-02-01), Clark
Goldowski, Abstract of 619264, Official Gazette, vol. 657, Apr. 29, 1952, p. 1582.

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