Substrate having high absorptance and emitance black electroless nicel coating and a process for producing the same
Patent
·
OSTI ID:5281236
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.
- Assignee:
- Ball Corp.
- Patent Number(s):
- US 4511614
- OSTI ID:
- 5281236
- Country of Publication:
- United States
- Language:
- English
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