FR2355285A1 - Detecting corrosion in buried pipes under cathodic protection - by measuring values and signs of point potentials, maximising certainty - Google Patents

Detecting corrosion in buried pipes under cathodic protection - by measuring values and signs of point potentials, maximising certainty

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Publication number
FR2355285A1
FR2355285A1 FR7618716A FR7618716A FR2355285A1 FR 2355285 A1 FR2355285 A1 FR 2355285A1 FR 7618716 A FR7618716 A FR 7618716A FR 7618716 A FR7618716 A FR 7618716A FR 2355285 A1 FR2355285 A1 FR 2355285A1
Authority
FR
France
Prior art keywords
point
corrosion
points
potential
cathodic protection
Prior art date
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.)
Granted
Application number
FR7618716A
Other languages
French (fr)
Other versions
FR2355285B1 (en
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.)
COPRELEC
Original Assignee
COPRELEC
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.)
Filing date
Publication date
Application filed by COPRELEC filed Critical COPRELEC
Priority to FR7618716A priority Critical patent/FR2355285A1/en
Publication of FR2355285A1 publication Critical patent/FR2355285A1/en
Application granted granted Critical
Publication of FR2355285B1 publication Critical patent/FR2355285B1/fr
Granted legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

Method of detecting points of corrosion in a buried metal element; e.g. a pipe, incorporates carrying out, while the pipe is under a cathodic protection potential, an exact measurement of the potential between a point on the ground vertically above a point of electrical leakage, localised by conventional techniques, and a point 2-10 m away, pref. laterally in relation to the axis of the pipe. Those points of escape showing the lowest potential are points of probable corrosion. Those points of leakage are subjected to a further test. The cathodic protection is cut off for a period and a measurement is made to determine the sense of the potential difference between a point on the ground vertically above such a point, and a point remote transversely with respect to the axis of the pipe. The point is considered as a corrosion point with a high degree of certainty if it shows as an anode with respect to the other point. The probable points of corrosion may be determined, if only the potential is measured, and the certain points of corrosion may be determined, if the sign is measured. Prior art methods allow only possible points of corrosion to be determined, in a short space of time.
FR7618716A 1976-06-18 1976-06-18 Detecting corrosion in buried pipes under cathodic protection - by measuring values and signs of point potentials, maximising certainty Granted FR2355285A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7618716A FR2355285A1 (en) 1976-06-18 1976-06-18 Detecting corrosion in buried pipes under cathodic protection - by measuring values and signs of point potentials, maximising certainty

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7618716A FR2355285A1 (en) 1976-06-18 1976-06-18 Detecting corrosion in buried pipes under cathodic protection - by measuring values and signs of point potentials, maximising certainty

Publications (2)

Publication Number Publication Date
FR2355285A1 true FR2355285A1 (en) 1978-01-13
FR2355285B1 FR2355285B1 (en) 1980-05-16

Family

ID=9174630

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7618716A Granted FR2355285A1 (en) 1976-06-18 1976-06-18 Detecting corrosion in buried pipes under cathodic protection - by measuring values and signs of point potentials, maximising certainty

Country Status (1)

Country Link
FR (1) FR2355285A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016706A1 (en) * 1979-03-21 1980-10-01 Intersub Engineering S.A. Method and device for checking the condition of a reinforced-concrete structure immersed in an electrically conductive liquid
EP0066959A1 (en) * 1981-05-15 1982-12-15 Harco Corporation Electrical surveys of underwater of underground structures
DE4011785C1 (en) * 1990-04-12 1991-08-08 Draegerwerk Ag, 2400 Luebeck, De Determining metal corrosion - by exposing metal part to confined atmos. of inert carrier gas, adding reactive gas for chemical reaction etc.
US20150204775A1 (en) * 2014-01-22 2015-07-23 Southwest Research Institute Detection of Corrosion Defects in Buried Pipelines Using Vertically Measured Pipe-To-Soil Potential
CN117821984A (en) * 2024-03-04 2024-04-05 成都秦川物联网科技股份有限公司 Intelligent gas pipeline cathode protection intelligent detection method and Internet of things system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016706A1 (en) * 1979-03-21 1980-10-01 Intersub Engineering S.A. Method and device for checking the condition of a reinforced-concrete structure immersed in an electrically conductive liquid
FR2452105A1 (en) * 1979-03-21 1980-10-17 Intersub Dev Sa METHOD AND DEVICE FOR MONITORING THE CONDITION OF A REINFORCED CONCRETE STRUCTURE IN AN ELECTRICALLY CONDUCTIVE LIQUID
EP0066959A1 (en) * 1981-05-15 1982-12-15 Harco Corporation Electrical surveys of underwater of underground structures
DE4011785C1 (en) * 1990-04-12 1991-08-08 Draegerwerk Ag, 2400 Luebeck, De Determining metal corrosion - by exposing metal part to confined atmos. of inert carrier gas, adding reactive gas for chemical reaction etc.
US20150204775A1 (en) * 2014-01-22 2015-07-23 Southwest Research Institute Detection of Corrosion Defects in Buried Pipelines Using Vertically Measured Pipe-To-Soil Potential
US10001436B2 (en) * 2014-01-22 2018-06-19 Southwest Research Institute In-situ measurement of corrosion in buried pipelines using vertically measured pipe-to-soil potential
CN117821984A (en) * 2024-03-04 2024-04-05 成都秦川物联网科技股份有限公司 Intelligent gas pipeline cathode protection intelligent detection method and Internet of things system

Also Published As

Publication number Publication date
FR2355285B1 (en) 1980-05-16

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