NO172352C - PROCEDURE AND DEVICE FOR MAINTENANCE OF A CATHODIC CORROSION PROTECTION OF METALLIC SURFACES - Google Patents

PROCEDURE AND DEVICE FOR MAINTENANCE OF A CATHODIC CORROSION PROTECTION OF METALLIC SURFACES

Info

Publication number
NO172352C
NO172352C NO880790A NO880790A NO172352C NO 172352 C NO172352 C NO 172352C NO 880790 A NO880790 A NO 880790A NO 880790 A NO880790 A NO 880790A NO 172352 C NO172352 C NO 172352C
Authority
NO
Norway
Prior art keywords
protective
potential
current
eact
corrosion protection
Prior art date
Application number
NO880790A
Other languages
Norwegian (no)
Other versions
NO880790L (en
NO172352B (en
NO880790D0 (en
Inventor
Hans Rickert
Guenther Holzaepfel
Original Assignee
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 Westfael Elekt Werke filed Critical Westfael Elekt Werke
Publication of NO880790D0 publication Critical patent/NO880790D0/en
Publication of NO880790L publication Critical patent/NO880790L/en
Publication of NO172352B publication Critical patent/NO172352B/en
Publication of NO172352C publication Critical patent/NO172352C/en

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>
NO880790A 1987-03-11 1988-02-23 PROCEDURE AND DEVICE FOR MAINTENANCE OF A CATHODIC CORROSION PROTECTION OF METALLIC SURFACES NO172352C (en)

Applications Claiming Priority (1)

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

Publications (4)

Publication Number Publication Date
NO880790D0 NO880790D0 (en) 1988-02-23
NO880790L NO880790L (en) 1988-09-12
NO172352B NO172352B (en) 1993-03-29
NO172352C true NO172352C (en) 1993-07-07

Family

ID=6322771

Family Applications (1)

Application Number Title Priority Date Filing Date
NO880790A NO172352C (en) 1987-03-11 1988-02-23 PROCEDURE AND DEVICE FOR MAINTENANCE OF A CATHODIC CORROSION PROTECTION OF METALLIC SURFACES

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
GR3001389T3 (en) 1992-09-11
EP0285747A1 (en) 1988-10-12
DE3861403D1 (en) 1991-02-07
NO880790L (en) 1988-09-12
DE3707791C1 (en) 1988-03-31
ES2020584B3 (en) 1991-08-16
ATE59414T1 (en) 1991-01-15
NO172352B (en) 1993-03-29
EP0285747B1 (en) 1990-12-27
NO880790D0 (en) 1988-02-23

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