DE3861403D1 - METHOD AND DEVICE FOR MAINTAINING CATHODIC CORROSION PROTECTION FOR METALLIC SURFACES. - Google Patents

METHOD AND DEVICE FOR MAINTAINING CATHODIC CORROSION PROTECTION FOR METALLIC SURFACES.

Info

Publication number
DE3861403D1
DE3861403D1 DE8888100558T DE3861403T DE3861403D1 DE 3861403 D1 DE3861403 D1 DE 3861403D1 DE 8888100558 T DE8888100558 T DE 8888100558T DE 3861403 T DE3861403 T DE 3861403T DE 3861403 D1 DE3861403 D1 DE 3861403D1
Authority
DE
Germany
Prior art keywords
protective
potential
current
eact
corrosion 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.)
Expired - Lifetime
Application number
DE8888100558T
Other languages
German (de)
Inventor
Hans Prof Dr Rickert
Guenther Dr Holzaepfel
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.)
RWE Energie AG
Original Assignee
VEREINIGTE ELEKTRIZITAETSWERKE WESTFALEN AG 4600 DORTMUND DE
WESTFAEL ELEKT WERKE
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 VEREINIGTE ELEKTRIZITAETSWERKE WESTFALEN AG 4600 DORTMUND DE, WESTFAEL ELEKT WERKE filed Critical VEREINIGTE ELEKTRIZITAETSWERKE WESTFALEN AG 4600 DORTMUND DE
Priority to DE8888100558T priority Critical patent/DE3861403D1/en
Application granted granted Critical
Publication of DE3861403D1 publication Critical patent/DE3861403D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/04—Controlling or regulating desired parameters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

For corrosion protection of metallic surfaces in contact with an electrolyte by an external current, using an inert electrode as the external current anode, and a potentiostat, the protective current being periodically switched off and the actual potential (Eact) being measured directly between the external current anode acting in this phase as reference electrode and the surface to be protected and being compared with the protective potential (Eset) set on the potentiostat, and the difference (Eact-Eset) being utilised directly as the control variable for the protective current, it is intended that the protective potential just prevailing at the time is measurable and hence readjustable independently of the protective current which has flowed through. This is achieved when the potential (Eact) is measured after a slight time interval after switching-off and is utilised in the control phase as the control variable for the protective current flowing during the switched-on time. <IMAGE>
DE8888100558T 1987-03-11 1988-01-16 METHOD AND DEVICE FOR MAINTAINING CATHODIC CORROSION PROTECTION FOR METALLIC SURFACES. Expired - Lifetime DE3861403D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8888100558T DE3861403D1 (en) 1987-03-11 1988-01-16 METHOD AND DEVICE FOR MAINTAINING CATHODIC CORROSION PROTECTION FOR METALLIC SURFACES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3707791A DE3707791C1 (en) 1987-03-11 1987-03-11 Method and device for maintaining cathodic corrosion protection for metallic surfaces with external current
DE8888100558T DE3861403D1 (en) 1987-03-11 1988-01-16 METHOD AND DEVICE FOR MAINTAINING CATHODIC CORROSION PROTECTION FOR METALLIC SURFACES.

Publications (1)

Publication Number Publication Date
DE3861403D1 true DE3861403D1 (en) 1991-02-07

Family

ID=6322771

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3707791A Expired DE3707791C1 (en) 1987-03-11 1987-03-11 Method and device for maintaining cathodic corrosion protection for metallic surfaces with external current
DE8888100558T Expired - Lifetime DE3861403D1 (en) 1987-03-11 1988-01-16 METHOD AND DEVICE FOR MAINTAINING CATHODIC CORROSION PROTECTION FOR METALLIC SURFACES.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE3707791A Expired DE3707791C1 (en) 1987-03-11 1987-03-11 Method and device for maintaining cathodic corrosion protection for metallic surfaces with external current

Country Status (6)

Country Link
EP (1) EP0285747B1 (en)
AT (1) ATE59414T1 (en)
DE (2) DE3707791C1 (en)
ES (1) ES2020584B3 (en)
GR (1) GR3001389T3 (en)
NO (1) NO172352C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025088A1 (en) * 1990-08-08 1992-02-13 Vaw Ver Aluminium Werke Ag CATHODICAL CORROSION PROTECTION FOR AN ALUMINUM CONTAINING SUBSTRATE
IT1253258B (en) * 1991-08-14 1995-07-14 Cgr Di Cadignani Gino PROCESS OF MAINTENANCE OF A CATHODIC PROTECTION AGAINST CORROSION AND DEVICE FOR THE IMPLEMENTATION OF SUCH PROCESS
SE502703C2 (en) * 1993-09-02 1995-12-11 Stri Ab Device for compensating an AC voltage occurring between a medium and a metallic pipeline located in the medium
DE4332922A1 (en) * 1993-09-28 1995-03-30 Kloeckner Humboldt Deutz Ag Two-high roller machine and process for the pressure comminution of granular moist material
BE1012223A3 (en) * 1998-10-07 2000-07-04 Mts Technical S A Protection device impose on current corrosion of water heater and similar equipment.
GB2518191B (en) * 2013-09-12 2017-08-02 Advantica Intellectual Property Ltd Survey device and method of surveying
CN111621792B (en) * 2020-07-03 2022-03-22 中国石油化工集团有限公司 Pipeline cathode protection output adjusting system and adjusting method
CN115558934B (en) * 2022-07-12 2024-04-19 国家管网集团浙江省天然气管网有限公司 Network-based constant potential rectifier fuzzy control method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2361547A1 (en) * 1973-12-11 1975-06-19 Karl Heinz Ortmann Cathodic protection of buried metal objects - using periodic switch-off potential for adjusting protective current
DE2916934C2 (en) * 1979-04-26 1981-05-07 Vereinigte Elektrizitätswerke Westfalen AG, 4600 Dortmund Method and device for maintaining cathodic protection against corrosion

Also Published As

Publication number Publication date
EP0285747B1 (en) 1990-12-27
GR3001389T3 (en) 1992-09-11
NO172352C (en) 1993-07-07
NO880790L (en) 1988-09-12
ES2020584B3 (en) 1991-08-16
EP0285747A1 (en) 1988-10-12
ATE59414T1 (en) 1991-01-15
DE3707791C1 (en) 1988-03-31
NO880790D0 (en) 1988-02-23
NO172352B (en) 1993-03-29

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: VEW ENERGIE AG, 44139 DORTMUND, DE

8339 Ceased/non-payment of the annual fee