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US5160590A
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Electrolytic processing method for electrolytically processing metal surface
Assignee: KAWASAKI AND SAN-AI OIL Co Ltd A CORP OF JAPAN
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Filing: 1991-10-03
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Granted: 1992-11-03
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Expires: 2011-10-03
Abstract
Abstract An electrolytic processing method for electrolytically processing the surface of a metallic member. A paste containing an electrolyte is prepared by mixing a paste-forming agent with a liquid electrolyte. The paste is placed between the metallic member and an opposing electrode. The metallic member and the opposing electrode are connected to an electrical power supply so that an electrical current is made to flow between the metallic member and the opposing electrode through the paste containing electrolyte, whereby the surface of the metallic member is electrolytically processed. Descaling, passivity treatment, coloring, polishing, plating and other electrolytic process can be performed on any type of metallic member at any desired place, by suitably selecting factors such as the compositon of the paste, condition of the electrical power supply and so forth.
Inventors
- 👤 Nobuo Totsuka
- 👤 Mitsuo Kimura
- 👤 Takao Kurisu
- 👤 Yuji Mishiro
- 👤 Masakazu Sengan
- 👤 Katsunobu Ishizawa
- 👤 Shigemitsu Kashihara
- 👤 Minoru Kanazawa
- 👤 Nagahiro Komatu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:40
CPC Classifications
C; C25; C25F; C25F1/00; C25D; C25D11/00; C25D11/02; C25D3/00; C25D5/00; C25D5/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
125 words
An electrolytic processing method for electrolytically processing the surface of a metallic member without requiring the use of any electrolytic solution tank, comprising the steps of: preparing an electrically conductive paste containing an electrolyte and having a viscosity in the range of 1,000-100,000 cp; placing said paste having said viscosity between said metallic member and an opposing electrode; said paste being a spreadable non-liquid material wherein said viscosity is sufficient to maintain it supported between the electrode and said metallic member without any other support; said paste extending continuously conductively between said metallic member and said opposite electrode; and causing an effective amount of an electrical current to flow between said metallic member and said opposing electrode through said paste to perform the electrolytic process.
Claim 2
Dependent Claim
125 words
An electrolytic processing method for electrolytically processing the surface of a metallic member without requiring the use of any electrolytic solution tank, comprising the steps of: preparing an electrically conductive paste containing an electrolyte and having a viscosity in the range of 1,000-100,000 cp; placing said paste having said viscosity between said metallic member and an opposing electrode; said paste being a spreadable non-liquid material wherein said viscosity is sufficient to maintain it supported between the electrode and said metallic member without any other support; said paste extending continuously conductively between said metallic member and said opposite electrode; and causing an effective amount of an electrical current to flow between said metallic member and said opposing electrode through said paste to perform the electrolytic process.
Claim 3
Dependent Claim
22 words
The electrolytic processing method according to claim 1, comprising the further step of relatively moving the metallic member and the opposing electrode.
Claim 4
Dependent Claim
24 words
The electrolytic processing method according to claim 1, including the further step of causing said paste to flow during flowing of said electrical current.
Claim 5
Dependent Claim
36 words
The electrolytic processing method according to claim 1, including the combined steps of effecting relative movement between said metallic member and said opposing electrode, and causing said paste to flow during flowing of said electrical current.
Claim 6
Dependent Claim
42 words
An electrolytic processing method according to claim 1, 2, 3 or 4, wherein said opposing electrode is covered by a cover made of an electrically insulating material and having chemical resistance enough to enable said cover to hold said paste by impregnation.
Claim 7
Dependent Claim
24 words
An electrolytic processing method according to claim 1, wherein the electrolytic processing is conducted to effect one of electrolytic descaling, passivity treatment and electro-plating.
Claim 8
Dependent Claim
47 words
The electrolytic processing method according to claim 1, wherein the processing method is a passivity treatment, and wherein the electrical current is provided for an electrolytic processing time of at least about ten minutes providing electricity in an amount of at least about 1 Coulomb/cm 2 .
Claim 9
Dependent Claim
35 words
The electrolytic processing method according to claim 1, wherein the processing method is a plating method, and wherein said electrical current is caused to flow at a current density of about 15-250 mA/cm 2 .
Claim 10
Dependent Claim
28 words
The method defined in claim 1 wherein said electrically conductive paste has greater resistance than an electrolytic solution to the mobility of the electrostatic charges of the electrolyte.
Claim 11
Dependent Claim
28 words
The method defined in claim 1 including the step of controlling the viscosity of said electrically conductive paste to allow relief of gases generated in said electrolytic processing.
Claim 12
Dependent Claim
114 words
An electrolytic processing method for electrolytically passivating the surface of a metallic member, comprising the steps of: preparing a paste having a viscosity ranging from 1,000 to 100,000 cp containing 3 wt. % of at least one or more kinds of ions selected from the group consisting of SO 4 2- , NO 3 - and PO 4 3- ; placing said paste between said metallic member and an opposing electrode; and supplying electricity through said paste at a rate of at least about 1.0 Coulomb/cm 2 using said metallic member and said opposing electrode as an anode and a cathode, respectively, thereby effecting a passivity treatment on said surface of said metallic member.
Claim 13
Dependent Claim
114 words
An electrolytic processing method for electrolytically passivating the surface of a metallic member, comprising the steps of: preparing a paste having a viscosity ranging from 1,000 to 100,000 cp containing 3 wt. % of at least one or more kinds of ions selected from the group consisting of SO 4 2- , NO 3 - and PO 4 3- ; placing said paste between said metallic member and an opposing electrode; and supplying electricity through said paste at a rate of at least about 1.0 Coulomb/cm 2 using said metallic member and said opposing electrode as an anode and a cathode, respectively, thereby effecting a passivity treatment on said surface of said metallic member.
Claim 14
Dependent Claim
81 words
An electrolytic processing method for electrolytically processing the surface of a metallic member, comprising the steps of: preparing a plating paste and having a viscosity ranging from 1,000 to 100,000 and containing an electrolyte; placing said paste between said metallic member and said opposing electrode; and causing an electrical current to flow between said metallic member and said opposing electrode through said paste, by connecting said metallic member and said opposing electrode to the anode and cathode of a power supply.
Claim 15
Dependent Claim
81 words
An electrolytic processing method for electrolytically processing the surface of a metallic member, comprising the steps of: preparing a plating paste and having a viscosity ranging from 1,000 to 100,000 and containing an electrolyte; placing said paste between said metallic member and said opposing electrode; and causing an electrical current to flow between said metallic member and said opposing electrode through said paste, by connecting said metallic member and said opposing electrode to the anode and cathode of a power supply.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-03 | 1996-05-04 | 1996-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-03 | 2000-05-04 | 2000-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-03 | 2004-05-04 | 2004-11-03 | $7700.00 | Window Closed / Lapsed |