Substrate having high absorptance and emittance black electroles

Details Substrate having high absorptance and emittance black electroles Substrate having high absorptance and emittance black electroles

1983-10-31

1985-04-16

Herbert, Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

148 614R, 156625, 156665, 427162, 427307, 427309, 427404, 427405, 428409, 428457, 428688, 428699, B32B 326, B05D 506, C23C 110, C23F 502

Patent

active

045116148

ABSTRACT:
A substrate having high absorptance and emittance is produced by roughening the surface of the substrate, immersing the substrate in a first electroless plating bath having a low phosphorus to nickel concentration, then immersing the substrate in a second electroless plating bath having a phosphorus to nickel concentration higher than that of said first electroless plating bath. Thereafter, the resulting electroless nickel-phosphorus alloy coated substrate is immersed in an aqueous acidic etchant bath containing sulfuric acid, nitric acid and divalent nickel to develop a highly blackened surface on said substrate.

REFERENCES:
patent: 3867207 (1975-02-01), Decker et al.
patent: 4233107 (1980-11-01), Johnson
patent: 4361630 (1982-11-01), Johnson

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