Claims
- 1. A device for establishing an electrical connection in an electrical circuit subjected to relatively high amperage current flow in which at least two conductive elements adapted to be brought into electrical contact, wherein at least one of the conductive elements includes an aluminum substrate having a surface free of oxide at least in a zone which is juxtaposed a zone which is to come in contact with another of said at least two conductive elements, said oxide free surface being produced by the deposition of a transient nickel coating by chemical displacement in an aqueous bath comprising:
- ______________________________________HF 5 to 50 g/lH.sub.3 BO.sub.3 10 to 60 g/lNiCl.sub.2.6H.sub.2 O 50 to 500 g/l.______________________________________
- and subsequent dissolution of the transient nickel coating, and an electrolytically deposited layer of essentially pure nickel adhered without an intermediate layer directly to the so produced oxide free surface of the aluminum substrate and wherein there is negligible diffusion of the electrolytically deposited nickel layer into the aluminum substrate.
- 2. A contact device as claimed in claim 1, wherein at least one conductive element of aluminum coated with nickel is brought into contact with a second contact element coated with a layer of silver at least in the contact zone.
- 3. A contact device as claimed in claim 2, wherein it comprises at least one contact element of aluminum coated with nickel which in turn is coated with silver.
- 4. A contact device as claimed in claim 1 wherein at least one of the contact elements is formed by an aluminum conductor of considerable length coated with a layer of nickel adhering directly to the substrate from one end to the other.
- 5. A device as claimed in claim 1 wherein at least one of the contact elements of aluminum consists of AGS/L.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7810333 |
Mar 1978 |
FRX |
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Parent Case Info
This is a continuation of application Ser. No. 025,488, filed Mar. 30, 1979, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (3)
Number |
Date |
Country |
520363 |
Jan 1956 |
CAX |
438228 |
Nov 1935 |
GBX |
593762 |
Oct 1947 |
GBX |
Non-Patent Literature Citations (1)
Entry |
F. A. Lowenheim, Electroplating, McGraw-Hill Book Co., New York, 1978, pp. 389-391. |
Continuations (1)
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Number |
Date |
Country |
Parent |
25488 |
Mar 1979 |
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