In-situ process for the monitoring of localized pitting corrosion

Pope, Daniel H.; Lin, YuPo J.; St. Martin, Edward J.; Frank, James R.

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Title: In-situ process for the monitoring of localized pitting corrosion

Abstract

A method and apparatus are provided for monitoring localized pitting corrosion in metal pipes or storage vessels. Electrochemical probes are used for sensing electrochemical noise voltage values and electrochemical noise current values. The root-mean-square electrochemical noise current and voltage values are calculated and stored for the sensed electrochemical noise voltage values and the electrochemical noise current values. The stored electrochemical noise current and voltage values are processed by transforming the stored electrochemical noise current and voltage values into power spectral density data utilizing a fast Fourier transform. A slope of the power spectral density data relative to frequency is calculated. The electrochemical probes include a pair of working electrodes formed of the same material of the monitored metal pipes or storage vessels and a reference electrode formed of a corrosion resistant material. A linear slope of a low-frequency portion of the power spectral density data is calculated by using a least-square method.

Inventors:: Pope, Daniel H.; Lin, YuPo J.; St. Martin, Edward J.; Frank, James R.

Issue Date:: Tue Mar 30 00:00:00 EST 1999

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1531426

Patent Number(s):: 5888374

Application Number:: 08/855,707

Assignee:: The University of Chicago (Chicago, IL)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N17/02 - Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement

Show less

DOE Contract Number:: W-31-109-ENG-38

Resource Type:: Patent

Resource Relation:: Patent File Date: 1997-05-08

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Pope, Daniel H., Lin, YuPo J., St. Martin, Edward J., and Frank, James R. In-situ process for the monitoring of localized pitting corrosion.  United States: N. p., 1999. 
        Web.

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                    Pope, Daniel H., Lin, YuPo J., St. Martin, Edward J., & Frank, James R. In-situ process for the monitoring of localized pitting corrosion.  United States.

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                    Pope, Daniel H., Lin, YuPo J., St. Martin, Edward J., and Frank, James R. Tue .  
        "In-situ process for the monitoring of localized pitting corrosion".  United States.  https://www.osti.gov/servlets/purl/1531426.

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@article{osti_1531426,

  title        = {In-situ process for the monitoring of localized pitting corrosion},

  author       = {Pope, Daniel H. and Lin, YuPo J. and St. Martin, Edward J. and Frank, James R.},

  abstractNote = {A method and apparatus are provided for monitoring localized pitting corrosion in metal pipes or storage vessels. Electrochemical probes are used for sensing electrochemical noise voltage values and electrochemical noise current values. The root-mean-square electrochemical noise current and voltage values are calculated and stored for the sensed electrochemical noise voltage values and the electrochemical noise current values. The stored electrochemical noise current and voltage values are processed by transforming the stored electrochemical noise current and voltage values into power spectral density data utilizing a fast Fourier transform. A slope of the power spectral density data relative to frequency is calculated. The electrochemical probes include a pair of working electrodes formed of the same material of the monitored metal pipes or storage vessels and a reference electrode formed of a corrosion resistant material. A linear slope of a low-frequency portion of the power spectral density data is calculated by using a least-square method.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Mar 30 00:00:00 EST 1999},

  month        = {Tue Mar 30 00:00:00 EST 1999}

}

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Works referenced in this record:

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patent, September 1992

Miller, James E.
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Works referencing / citing this record:

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Similar Records

Title: In-situ process for the monitoring of localized pitting corrosion

Abstract

Citation Formats

Electrochemical noise measurement technique for the determination of aluminum alloy pit initiation rates patent, September 1992

Corrosion monitoring patent, March 1986

Corrosion monitoring patent, August 1992

General and localized corrosion rate measurements patent, November 2009

Detection of sealing by means of noise analysis patent, June 2010

Quantitative, real time measurements of localized corrosion events patent, March 2010

Monitoring of corrosion induced loss of material by means of a plurality of electrical resistance measurements (field signature method, electrical resistance tomography) patent, January 2006

Calcium hypochlorite of reduced reactivity patent, August 2004

Baffle plates for an ultraviolet reactor patent, November 2013

Semiconductive polymeric system, devices incorporating the same, and its use in controlling corrosion patent, May 2005

Free radical generator and method patent, January 2006

Dynamic optimization of chemical additives in a water treatment system patent, July 2002

Method and system of preventing corrosion of conductive structures patent, April 2003

Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals patent, October 2007

Sub-coating coated metal corrosion measurement patent, January 2015

Corrosion control utilizing a hydrogen peroxide donor patent, November 2003

Device and process for examining the signals of systems releasing them during operation or in response to external excitation patent, November 2010

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Assessment of corrosion patent, July 2001

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Electrode design for corrosion monitoring using electrochemical noise measurements patent, September 2001

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Process for real-time detection and inhibition of localized corrosion patent, March 2002

Corrosion monitoring patent, June 2000

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System for optimized control of multiple oxidizer feedstreams patent, September 2003

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Methods of optimized control of multiple oxidizer feedstreams patent, September 2003

Investigating corrosion patent, March 2005

Air and water purification using continuous breakpoint halogenation patent, July 2002

Free radical generator and method patent, December 2004

Configurable corrosion measurement field device patent, July 2007

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Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals patent, September 2006

Method and arrangement for a water treatment patent, November 2014

Air and water purification using continuous breakpoint halogenation and peroxygenation patent, June 2002

Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water patent, February 2014

Electrochemical noise measurement technique for the determination of aluminum alloy pit initiation rates
patent, September 1992

Corrosion monitoring
patent, March 1986

Corrosion monitoring
patent, August 1992

General and localized corrosion rate measurements
patent, November 2009

Detection of sealing by means of noise analysis
patent, June 2010

Quantitative, real time measurements of localized corrosion events
patent, March 2010

Monitoring of corrosion induced loss of material by means of a plurality of electrical resistance measurements (field signature method, electrical resistance tomography)
patent, January 2006

Calcium hypochlorite of reduced reactivity
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Baffle plates for an ultraviolet reactor
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Semiconductive polymeric system, devices incorporating the same, and its use in controlling corrosion
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Dynamic optimization of chemical additives in a water treatment system
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Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals
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Sub-coating coated metal corrosion measurement
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Corrosion control utilizing a hydrogen peroxide donor
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Device and process for examining the signals of systems releasing them during operation or in response to external excitation
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Method for measuring a concentration of a compound in a liquid stream
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Assessment of corrosion
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Method of irradiating a liquid
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Method and system for providing ultrapure water
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Corrosion measurement field device with improved LPF, HDA, and ECN capability
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Intrinsically safe corrosion measurement and history logging field device
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Enhanced time-based proportional control
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Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
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