Patent US4111830A successfully refreshed from Google Patents.
US4111830A
Expired / Lapsed
US
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Method of inhibiting corrosion
Assignee: Individual
•
Filing: 1976-09-29
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Granted: 1978-09-05
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Expires: 1996-09-29
Abstract
Abstract A method of retarding corrosion of metal parts in an aqueous-containing fluid system which comprises, adding to the aqueous-containing fluid system a mixture of a water-soluble cation of mercury and a water-soluble cation of a Group IB or Group IIB metal.
Inventors
- 👤 Ramon A. Bannister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:52
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/187
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
A method of inhibiting corrosion of metals which contact aqueous containing fluids which comprises, adding to the fluid a synergistic mixture of water soluble cations in a corrosion inhibiting amount, said synergistic mixture consisting essentially of a mercuric cation and a metal cation selected from the group consisting of Group IB metals, Group IIB metals, and lead; and contacting the metal with the corrosion inhibiting fluid.
Claim 2
Independent Claim
66 words
A method of inhibiting corrosion of metals which contact aqueous containing fluids which comprises, adding to the fluid a synergistic mixture of water soluble cations in a corrosion inhibiting amount, said synergistic mixture consisting essentially of a mercuric cation and a metal cation selected from the group consisting of Group IB metals, Group IIB metals, and lead; and contacting the metal with the corrosion inhibiting fluid.
Claim 3
Dependent Claim
15 words
The method according to claim 1 wherein said fluid is an aqueous chloride-ion containing fluid.
Claim 4
Dependent Claim
26 words
The method according to claim 2 wherein said water-soluble mercuric ion is a member of the group consisting of mercuric nitrate, mercuric acetate and mercuric cyanide.
Claim 5
Dependent Claim
41 words
The method according to claim 3 wherein the concentration of mercuric ion is from 2 parts per million to 5,000 parts per million and the concentration of water-soluble metal cation is from 1 part per million to 50,000 parts per million.
Claim 6
Dependent Claim
25 words
The method according to claim 3 wherein said water-soluble metal cation is selected from the group consisting of zinc, cadmium, copper, gold, silver and lead.
Claim 7
Dependent Claim
23 words
The method according to claim 1 wherein said metal is selected from the group consisting of stainless steel, carbon steel, iron and aluminum.
Claim 8
Dependent Claim
33 words
The method according to claim 3 wherein the concentration of mercuric ion is from 10 ppm. to 1,000 ppm. and the concentration of water-soluble metal cation is from 5 ppm. to 10,000 ppm.
References Cited (Backward Citations)
US3151087A
Cited
US3880585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |