[go: up one dir, main page]

NL7804164A - Automatic system for measurement-control of cathodic protection - incorporates timer so that potential difference measurement is made instantly cathode current is switched out - Google Patents

Automatic system for measurement-control of cathodic protection - incorporates timer so that potential difference measurement is made instantly cathode current is switched out

Info

Publication number
NL7804164A
NL7804164A NL7804164A NL7804164A NL7804164A NL 7804164 A NL7804164 A NL 7804164A NL 7804164 A NL7804164 A NL 7804164A NL 7804164 A NL7804164 A NL 7804164A NL 7804164 A NL7804164 A NL 7804164A
Authority
NL
Netherlands
Prior art keywords
measurement
potential difference
voltage
cathodic protection
measured
Prior art date
Application number
NL7804164A
Other languages
Dutch (nl)
Original Assignee
Velde Henning J C Ing Buero
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 Velde Henning J C Ing Buero filed Critical Velde Henning J C Ing Buero
Priority to NL7804164A priority Critical patent/NL7804164A/en
Publication of NL7804164A publication Critical patent/NL7804164A/en

Links

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
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

The potential difference between a reference electrode and the surface of the object to be protected in a cathodic protection system is automatically measured by means of a system which incorporates time switches for switching out the cathode current thereby eliminating the electrolyte voltage drop error at the time of the measurement. The system consists of an amplifier for amplifying the voltage at the reference electrode, a timing device for switching off the feed rectifier for short periods whilst leaving it switched in for long periods, a memory which stores the "out" voltage measured during the switched out period, a selector circuit for comparing the incoming voltage signal from several reference electrodes and selecting the lowest value which is then used for automatic regulation and a differential amplifier which compares the selected measured value with a reference voltage and gives no signal if the measured value is equal to or greater than the reference value. The system enables the cathodic protection system to be automatically regulated on the basis of a potential difference measured when no current is flowing eliminating the IR error. Since the measurement is carried out almost instantly the current is switched out, the error due to depolarisation is also avoided.
NL7804164A 1978-04-19 1978-04-19 Automatic system for measurement-control of cathodic protection - incorporates timer so that potential difference measurement is made instantly cathode current is switched out NL7804164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7804164A NL7804164A (en) 1978-04-19 1978-04-19 Automatic system for measurement-control of cathodic protection - incorporates timer so that potential difference measurement is made instantly cathode current is switched out

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7804164A NL7804164A (en) 1978-04-19 1978-04-19 Automatic system for measurement-control of cathodic protection - incorporates timer so that potential difference measurement is made instantly cathode current is switched out

Publications (1)

Publication Number Publication Date
NL7804164A true NL7804164A (en) 1979-10-23

Family

ID=19830683

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7804164A NL7804164A (en) 1978-04-19 1978-04-19 Automatic system for measurement-control of cathodic protection - incorporates timer so that potential difference measurement is made instantly cathode current is switched out

Country Status (1)

Country Link
NL (1) NL7804164A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5216370A (en) * 1991-10-24 1993-06-01 Corrpro Companies, Inc. Method and system for measuring the polarized potential of a cathodically protected structures substantially IR drop free

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5216370A (en) * 1991-10-24 1993-06-01 Corrpro Companies, Inc. Method and system for measuring the polarized potential of a cathodically protected structures substantially IR drop free

Similar Documents

Publication Publication Date Title
ES8502577A1 (en) Device for signalling a specific charge condition of an accumulator battery.
JPS5536800A (en) Resistance neutralization system for electrochemical device
JPS57124946A (en) Pulse detection circuit
GB1340222A (en) Sampling and control system for cathodic protection
US4009091A (en) Skipping sine wave pulse plater system
JPS56121363A (en) Gate circuit for thyristor
NL7804164A (en) Automatic system for measurement-control of cathodic protection - incorporates timer so that potential difference measurement is made instantly cathode current is switched out
ES280376U (en) Device for partially determining voltages or charges on a human body and for diverting such voltages or charges from a human body.
NO880790L (en) PROCEDURE AND DEVICE FOR MAINTENANCE OF A CATHODIC CORROSION PROTECTION OF METALLIC SURFACES.
JPS5715986A (en) Heat-sensitive recording device
JPS5753892A (en) Prom protecting circuit for misinsertion of prom writer
JPS5644869A (en) Device for determining of accumulator efficiency
JPS57203323A (en) Offset controller
JPS54116277A (en) Abnormal voltage detecting circuit
JPS5595447A (en) Supervisory circuit for current level of transmission line for multiplex transmission device
JPS54103526A (en) Electrical route insulation resistance supervising device
JPS55154473A (en) Low voltage distribution line phase detecting system
JPS55103079A (en) Switching regulator
JPS5478950A (en) Automatic equalizer
JPS5550977A (en) Arc starting method with controlled arc starting current and apparatus thereof
JPS55111954A (en) Method and apparatus for image formation
JPS57175261A (en) Detecting circuit for fluctuation of power supply
JPS57175962A (en) Detecting and resetting circuit for voltage drop
JPS5563181A (en) Direct current regeneration circuit
JPS5566844A (en) Electron beam generating apparatus

Legal Events

Date Code Title Description
A1B A search report has been drawn up
A85 Still pending on 85-01-01
BV The patent application has lapsed