GB1506496A – Gold plating baths
– Google Patents
GB1506496A – Gold plating baths
– Google Patents
Gold plating baths
Info
Publication number
GB1506496A
GB1506496A
GB16105/75A
GB1610575A
GB1506496A
GB 1506496 A
GB1506496 A
GB 1506496A
GB 16105/75 A
GB16105/75 A
GB 16105/75A
GB 1610575 A
GB1610575 A
GB 1610575A
GB 1506496 A
GB1506496 A
GB 1506496A
Authority
GB
United Kingdom
Prior art keywords
plating
ammonium
alkali metal
cyanide
bath
Prior art date
1974-04-19
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB16105/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oxy Metal Industries Corp
Original Assignee
Oxy Metal Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1974-04-19
Filing date
1975-04-18
Publication date
1978-04-05
1975-04-18
Application filed by Oxy Metal Industries Corp
filed
Critical
Oxy Metal Industries Corp
1978-04-05
Publication of GB1506496A
publication
Critical
patent/GB1506496A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
C25D3/00—Electroplating: Baths therefor
C25D3/02—Electroplating: Baths therefor from solutions
C25D3/48—Electroplating: Baths therefor from solutions of gold
Abstract
1506496 Electo-plating gold OXY METAL INDUSTRIES CORP 18 April 1975 [19 April 1974] 16105/75 Heading C7B An aqueous Au electro-plating bath contains Au in the form of a complex, e.g. as ammonium, amine or alkali metal (Na or K) Au cyanide or sulphite, adjusted to a pH suitable for plating (at least 3.5 for cyanide or 5À5 to 10À5 for sulphite), and an amido-polyphosphate compound (ammonium or alkali metal) in sufficient quantity e.g. 1 to 100 g/l to produce a brighter deposit. Preferably the bath also contains at least 1 g/l of a polyphosphate compound, e.g. ammonium or alkali metal (Na or K) pyrophosphate, tripolyphosphate or tetrametapolyphosphate. At least 0À01 g/l of Co and/or Ni ion may be included in a cyanide complex bath to improve hardness. Other brighteners, such as hydrazine or piperazine derivatives, and As, Sb or Se ions, may be added. Alloying metals may also be present. The amidopolyphosphate compound may be made by reacting anhydrous ammonia with P 2 O 5 at 150‹C. Plating may be effected on brass panels or plastic rendered conductive by electroless plating. Examples of baths specified are Na 3 [Au(SO 3 ) 2 ], Na 2 SO 3 , NH 4 amidopolyphosphate, (optionally Na 4 P 2 O 7 , Na 5 P 3 O 10 or Na 4 P 4 O 12 ) and NaOH to pH 9(or 8À5); and KAu (CN) 2 , K 2 HPO 4 (or K 4 P 4 O 7 ), NH 4 amido-polyphosphate, (optionally CoSO 4 or NiSO 4 ), and H 3 PO 4 to pH 7 (or 4).
GB16105/75A
1974-04-19
1975-04-18
Gold plating baths
Expired
GB1506496A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US462268A
US3898137A
(en)
1974-04-19
1974-04-19
Method of electroplating gold and gold plating baths containing an amido-polyphosphate
Publications (1)
Publication Number
Publication Date
GB1506496A
true
GB1506496A
(en)
1978-04-05
Family
ID=23835821
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB16105/75A
Expired
GB1506496A
(en)
1974-04-19
1975-04-18
Gold plating baths
Country Status (7)
Country
Link
US
(1)
US3898137A
(en)
JP
(1)
JPS5510672B2
(en)
CA
(1)
CA1043734A
(en)
CH
(1)
CH606504A5
(en)
DE
(1)
DE2516252C3
(en)
FR
(1)
FR2268093B1
(en)
GB
(1)
GB1506496A
(en)
Families Citing this family (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4207149A
(en)
*
1974-12-04
1980-06-10
Engelhard Minerals & Chemicals Corporation
Gold electroplating solutions and processes
JPH04107279U
(en)
*
1991-02-25
1992-09-16
US5277790A
(en)
*
1992-07-10
1994-01-11
Technic Incorporated
Non-cyanide electroplating solution for gold or alloys thereof
US5454876A
(en)
*
1994-08-02
1995-10-03
21St Century Companies, Inc.
Process for reducing lead leachate in brass plumbing components
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2122122A
(en)
*
1935-11-25
1938-06-28
Victor Chemical Works
Water softener
JPS4953543A
(en)
*
1972-09-28
1974-05-24
1974
1974-04-19
US
US462268A
patent/US3898137A/en
not_active
Expired – Lifetime
1975
1975-04-11
CH
CH461375A
patent/CH606504A5/xx
not_active
IP Right Cessation
1975-04-14
DE
DE2516252A
patent/DE2516252C3/en
not_active
Expired
1975-04-16
FR
FR7511864A
patent/FR2268093B1/fr
not_active
Expired
1975-04-18
CA
CA224,943A
patent/CA1043734A/en
not_active
Expired
1975-04-18
GB
GB16105/75A
patent/GB1506496A/en
not_active
Expired
1975-04-19
JP
JP4807975A
patent/JPS5510672B2/ja
not_active
Expired
Also Published As
Publication number
Publication date
DE2516252C3
(en)
1980-01-10
JPS5510672B2
(en)
1980-03-18
US3898137A
(en)
1975-08-05
JPS50143734A
(en)
1975-11-19
DE2516252A1
(en)
1975-11-20
FR2268093B1
(en)
1978-06-30
CH606504A5
(en)
1978-10-31
DE2516252B2
(en)
1979-05-17
CA1043734A
(en)
1978-12-05
FR2268093A1
(en)
1975-11-14
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(en)
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Legal Events
Date
Code
Title
Description
1978-08-16
PS
Patent sealed [section 19, patents act 1949]
1985-01-03
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1985-12-24
PCNP
Patent ceased through non-payment of renewal fee
