Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1989-01-23
1989-09-26
Niebling, John F.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
204 40, 204 44, 204 445, 428637, 428675, 428678, 428935, C25D 510, C25D 518
Patent
active
048699713
ABSTRACT:
A process for electrodepositing a multilayer deposit on an electrically-conductive substrate from a single electrodeposition bath yields a deposit which includes a sequence of essentially repeating groups of layers. Each group of layers comprises a layer of a first electrodeposited material and a layer of a second electrodeposited layer. The process includes the steps of immersing the substrate in an electrodeposition bath and repeatedly passing a charge burst of a first electric current and a second electric current through the electrodeposition bath to the substrate. The first electric current is a pulsed current with a first pulsed-on/off waveform and a first peak current density which is effective to electrodeposit the first electrodeposited material. The second electric current has a second waveform and a second current density which is effective to electrodeposit the second electrodeposited material. The duration of the charge bursts of the first and second electric currents is effective to cause layers of the first and second electrodeposited material of desired thicknesses to be deposited. Electrodeposits produced by preferred process of the invention can have outstanding mechanical and other properties.
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Nee Chin-Cheng
Weil Rolf
Leader William T.
Niebling John F.
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