US4683035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for in situ corrosion detection using electrochemically active compounds
Assignee: ChampionX LLC
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Filing: 1986-02-03
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Granted: 1987-07-28
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Expires: 2006-02-03
Abstract
Abstract The invention comprises a method for determining the corrosion rate of metals in contact with a liquid system which is capable of causing corrosion of such metals which comprises adding to the liquid system an electrochemically active compound having a reduction potential more positive than the metal in contact with the liquid system and then monitoring the system thus treated with the electrochemically active compound to determine its rate of reduction which is proportional to the corrosion rate of the metal.
Inventors
- 👤 Barry E. Hunt
- 👤 Harvey M. Herro
- 👤 Kyu-Hwa Lee
- 👤 Morris Mindick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:01
CPC Classifications
G; G01; G01N; G01N17/00; Y; Y10; Y10S; Y10S436/00; Y10S436/904
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
A method for determining the corrosion rate of metals in contact with a liquid system which is capable of causing corrosion of such metals which comprises adding to the liquid system a soluble electrochemically active compound having a reduction potential more positive than the metal in contact with the liquid system and then monitoring the system thus treated with the electrochemically active compound by analytically detecting the soluble reduced form of the electrochemically active compound which was produced in situ and correlating the amount of the reduced form with the amount of corrosion.
Claim 2
Independent Claim
93 words
A method for determining the corrosion rate of metals in contact with a liquid system which is capable of causing corrosion of such metals which comprises adding to the liquid system a soluble electrochemically active compound having a reduction potential more positive than the metal in contact with the liquid system and then monitoring the system thus treated with the electrochemically active compound by analytically detecting the soluble reduced form of the electrochemically active compound which was produced in situ and correlating the amount of the reduced form with the amount of corrosion.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the liquid system is a non-aqueous system.
Claim 4
Independent Claim
92 words
A method for determining the corrosion rate of ferrous metals in contact with an aqueous system capable of causing the corrosion of such ferrous metals which comprises adding to the aqueous system a soluble electrochemically active tetrazolium compound having a reduction potential more positive than the ferrous metals in contact with the aqueous system and then monitoring the system thus treated by analytically detecting the soluble reduced form, which was produced in situ, of the electrochemically active tetrazolium compound and correlating the amount of the reduced form with the amount of corrosion.
Claim 5
Independent Claim
92 words
A method for determining the corrosion rate of ferrous metals in contact with an aqueous system capable of causing the corrosion of such ferrous metals which comprises adding to the aqueous system a soluble electrochemically active tetrazolium compound having a reduction potential more positive than the ferrous metals in contact with the aqueous system and then monitoring the system thus treated by analytically detecting the soluble reduced form, which was produced in situ, of the electrochemically active tetrazolium compound and correlating the amount of the reduced form with the amount of corrosion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |