Abstract: Disclosed is a method of controlling a real-time oxidation-reduction potential in a hot water system to inhibit corrosion in the hot water system. The method includes defining one or more operational protective zones in the hot water system. One or more of the operational protective zones includes an oxidation-reduction potential probe that is operable to measure a real-time oxidation-reduction potential in the hot water system at operating temperature and pressure. The probe transmits the measured real-time potential to the controller, which assesses and interprets the transmitted potential to determine whether it conforms to an oxidation-reduction potential setting. If the measured potential does not conform the oxidation-reduction potential setting, the controller is operable to feed one or more active chemical species into the hot water system.

Abstract: A non-metallic coupon holder assembly comprising a non-metallic support structure and a plurality of coupon holders. The pluralities of coupon holders are disposed throughout the non-metallic support structure wherein the pluralities of coupon holders are designed to secure a metal coupon on at least two edges.

Abstract: The present invention provides a corrosion loss measuring apparatus which enables to quantitatively determine corrosion loss characteristics of ceramic materials and heat-resistant metallic materials, which is excellent in terms of safety, cost, and operation easiness, and whose size can be reduced. The invention also provides a method for measuring corrosion loss by use of the apparatus.

Abstract: A sensor-dispensing instrument (10) adapted to handle a sensor pack containing a plurality of sensors and to perform a test using one of the sensors. The sensor-dispensing instrument includes an outer housing (12) and a mechanical mechanism contained therein for rotating the sensor pack and ejecting one of the sensors from the sensor pack and through a sensor slot on the housing. The sensor-dispensing instrument also includes a sensor actuator to engage with a sensor disposed in the sensor slot, and a sensor release (66) that is movable to disengage the sensor actuator from the sensor disposed in the sensor slot and permit the discharge of the sensor the sensor release additionally activating a sensor release mechanism that has a sensor release aid arm, a mounting block, and a pivot pin that connects the sensor release aid arm to the mounting block, wherein the sensor release aid arm is adapted to contact the sensor disposed in the sensor slot to assist removal of the sensor from the sensor slot.

Abstract: The present invention relates to an apparatus and method as described in the specification and drawings for parallel high throughput corrosion testing and electroplating testing of test coupons.

Abstract: A method and system for determining chemical properties of a fluid. The method and system include providing a weak electrolyte fluid, a container for the fluid, a detection method performed by a device having at least two electrodes, a detection and amplification device coupled to the electrodes and a sensed current compared to an uncontaminated, base fluid or compared to data characteristic of fluid contaminated or chemically changed in order to monitor and characterize the fluid.

Abstract: A system for sulfide stress cracking testing comprises an enclosed testing chamber including a fluid bath comprising a liquid saturated with hydrogen sulfide gas. In addition, the system comprises a test fixture disposed in the testing chamber and at least partially submerged in the fluid bath. The test fixture includes a housing having an internal chamber in fluid communication with the fluid bath and a test assembly disposed in the internal chamber. The test assembly comprises a first upper support and a second upper support, a first lower support and a second lower support, and a first platen engaging each of the upper supports and adapted to transfer an applied vertical load to the upper supports. Further, the system comprises a test specimen mounted in the test assembly between the upper supports and the lower supports.

Abstract: A chemical exposure indication device is disclosed. The device is removably attachable to a structure and includes a substrate having a first surface and a second surface and an indicating layer overlying the first substrate surface. The indicating layer includes a coating material that is chemically reactive with a pre-determined chemical compound that is known to degrade the structure. When the coating material is exposed to that corrosive compound in a pre-determined level associated with degradation of a metallic structure, the coating material provides a visual indication of the presence of the corrosive compound.

Abstract: A corrosion detection product is a coating including a film forming material and a complexing agent, the complexing agent forming a complex when it comes into contact with a corrosion byproduct produced by corrosion of a substrate on which the coating is applied, the complex being detectably different from the complexing agent when the coating is exposed to radiation in order to detect the corrosion, the complexing agent being immobilized in the coating to reduce leaching of the complexing agent or the complex from the coating.

Abstract: A detection method and indicator are disclosed that includes quantum dots that fluoresce under illumination of a first light having a first wavelength to indicate the presence of a predetermined condition, and in particular, a corrosion condition. The quantum dots are surrounded by a shell material that under normal conditions reflect the first light and reacts in the presence of the predetermined condition to permit the first light to illuminate the quantum dot to excite the quantum dot to emit a second light having a second wavelength, which when detected, indicates the presence of the predetermined condition.

Abstract: Provided is a polymer sample analyzer from which chemical findings on the optical deterioration of a polymer material are available in a very short time. The analyzer is equipped with a gas phase component production unit for producing a plurality of gas phase components, a carrier gas introduction unit for introducing a carrier gas into the gas phase component production unit, a separation unit for separating the gas phase components into each component, and a detection unit 5 for detecting the each component thus separated. The analyzer is equipped further with a UV irradiation unit for exposing the polymer sample to UV ray, an atmospheric gas introduction unit for introducing an atmospheric gas into the gas phase component production unit and a gas switching unit for switching a gas to be introduced into the separation unit between the carrier gas and the atmospheric gas.

Abstract: A deposit removal probe for monitoring the effectiveness of a chemical at removing deposits from the internal surface of a pipeline used to transport fluids comprising a chamber constructed from mesh having a pore size sufficient to retain a sample of said deposit in said chamber while also allowing the deposit to be removed from the chamber with the action of the chemical and liquid flow through the pipeline and methods of using the probe to determine the effectiveness of a chemical at removing deposits from the internal surface of a pipeline and monitor corrosion rates of surfaces in contact with the deposit and in the bulk fluid.

Abstract: An apparatus and method for measuring and monitoring the corrosion potential of engineering alloys used in aqueous systems is disclosed and claimed. The method is applicable for a variety of alloys including, but not limited to, copper-based, iron-based, nickel-based, other metallic-based alloys, and their combinations. The corrosion potential is typically determined by measuring a voltage between a specific material in the described oxidation-reduction potential measuring device and a reference electrode. Corrosion potentials for specific materials of construction may be used for diagnostic or control purposes.

Abstract: An apparatus for performing tests on materials, the apparatus comprising a leaktight receptacle defining an inside volume, the receptacle being provided with an opening and the ability to provide leaktight contact between the edges of the opening and a portion of a surface of a test piece of a material disposed outside the receptacle. The receptacle also has the ability for introducing at least one chemical agent in order to create, within the inside volume, a test chemical environment to which the surface portion of the test piece is exposed; and with a drain for draining the introduced chemical agent(s). The receptacle is also provided with a bottom including a surface that is inclined or conical and that co-operates with the drain to enable the introduced chemical agent(s) to be removed totally or in part. The apparatus is used in a method for carrying out tests on materials.

Abstract: The corrosion rate of a metal immersed in a fluid medium is measured by transmission of a beam of radiation normally in the visible or near infra-red portion of the spectrum, through a thin film of the metal immersed in the medium. The film of the metal is suitably supported on a radiation-transmitting substrate such as a glass plate or slide. The corrosion rate can be determined by passing a radiation beam through the metal film sample using a twin beam system to compensate for instrument factors such as the absorbance by the fluid medium, the cell windows and the film-supporting substrate. As the thickness of the film decreases, the reduction in film thickness is determined by the increase in beam intensity, using a reference beam to compensate for the instrument factors.

Abstract: A method and system for selecting fluids for compatibility with specified metals exposed to oil field environments. Metal specimens are tested for corrosion and/or cracking behavior by exposing them to fluids under stressful test conditions. The testing is conducted under variable temperature, pressure, pH, fluid density, metallurgical stress, additives, cover gases and combinations thereof. The results from the stress testing are stored in a database. The test results are evaluated using encoded logic embedded in software media. Fluid compatibility evaluation software, developed from the stress test results, is executed to determine the cracking susceptibility of metals exposed to fluids under stressful conditions. A cracking susceptibility index can be developed to provide a quantitative indicator of cracking susceptibility. Fluid recommendation reports utilize the cracking susceptibility index values to rank compatible fluids. The reports also list optional additives to be used with the fluids.

Abstract: An apparatus for monitoring corrosion in a pressurized system such as a water-based fire protection system comprising a corrosion monitor mounted within a section of the system containing fluid, wherein the corrosion monitor comprises a surface comprising at least one point of weakness wherein corrosion of a point of weakness causes a change in pressure in an interior chamber of the monitor, which change can be to provide a signal alerting monitoring personnel.

Abstract: The present relates in general to upconversion luminescence (“UCL”) materials and methods of making and using same and more particularly, but not meant to be limiting, to Mn2+ doped semiconductor nanoparticles for use as UCL materials. The present invention also relates in general to upconversion luminescence including two-photon absorption upconversion, and potential applications using UCL materials, including light emitting diodes, upconversion lasers, infrared detectors, chemical sensors, temperature sensors and biological labels, all of which incorporate a UCL material.

Abstract: A method includes assessing corrosion in a refinery operation having a piping network. Assessing can include identifying in a petroleum sample a presence and an amount of a species determined to be potentially corrosive to corrodible equipment in a refinery. A corrosion risk presented by the presence, the amount, and the boiling point of the species is determined. And, the corrosion risk is evaluated in view of piping network information. A system for implementing the method is provided, also.

Abstract: A corrosion monitoring device for monitoring corrosion in fluid containing systems and other equipment exposed to a corrosive environment comprising sensor elements having a composition substantially the same as the equipment being monitored, the sensor elements having a predetermined thickness for exposure to a corrosive solution of the fluid containing system. An electrical property of the monitoring device changes when corrosion penetrates through the thickness of the sensor element. A digital output device generates a first binary signal when corrosion has not penetrated through the thickness of the sensor elements, and a second binary signal when corrosion has penetrated through the thickness of the sensor elements. Multiple sensor elements may be used to provide multiple binary signals. Information from the digital outputs may be processed to provide a cumulative log of corrosion measurements.

Abstract: An acoustic wave sensor system for monitoring the etch rate or etch ability of a selective material has an acoustic wave sensing device having a piezoelectric substrate and at least one electrode coupled to the substrate for generating a propagating acoustic wave and for detecting changes in frequency or other propagation characteristics of the acoustic wave. A selective material is disposed on the substrate. Changes in propagation characteristics of the wave caused by etching of the selective material by an etchant can be analyzed to evaluate the etching rate or etch ability of the selective material. The sensing system can have a wireless sensing device which device is mountable in an oil filter system for monitoring the corrosion of the engine. The sensing device can be configured as BAW, SH-SAW, SH-APM, FPM devices or other acoustic wave devices.

Abstract: The present invention relates to a device comprising a thermobalance equipped with a detector (5) for measuring acoustic signals emitted by a sample (6) hanging from the balance beam and a preamplifier (2) incorporated in the vicinity of the head of the balance. The invention allows gas phase kinetic study of the degradation of materials and of depositions on these materials under temperature (100 to 1400° C.). In particular, corrosion phenomena such as: oxidation, sulfurization, carbonizing, metal dusting, nitriding, hydridation, chlorination, molten salt attack, and combinations of these degradations. Besides, deposits on the materials can be due to coking phenomena (carbon deposits), deposition of molten salts, volatile compounds condensation. The invention allows evaluation of the efficiency of inhibitors against corrosion and deposition processes.

Abstract: The present invention is an apparatus for simulating corrosion activity in liquid and vapor/condensate corrosion environments. The apparatus includes a container, including a lower region containing the liquid and an upper region, including a condenser, a heater for providing heat to the lower region such that the liquid is maintained at a given temperature, a vacuum pump for providing a partial vacuum at a given pressure in the upper region of the container, one corrosion probe removably positioned in the liquid, and a second corrosion probe removably positioned above the liquid.

Abstract: A weathering test method comprising making active oxygen and light simultaneously act on a test piece, a weathering test method comprising successive and/or alternate steps of making active oxygen and light simultaneously act on a test piece and making at least one of light, oxygen, and water to act on the test piece, and apparatus for carrying out the methods are disclosed. In evaluating weatherability of organic materials, articles made of organic materials or articles coated with organic materials, the methods and apparatus achieve acceleration of deterioration of test pieces to greatly reduce the testing time.

Abstract: A method of monitoring or predicting corrosion using a field signature method is provided which is intended to be applicable to non-linear locations, such as bends, junctions and the like. The method includes obtaining information on a relationship which links voltage measurements, obtained for a location, between two or more electrical contacts in contact with the location at a first time and one or more other times when a current is passed through the location, to the loss of material from the location. The information on the relationship is used in a modelling process which includes the generation of a model of the location, two or more points on that location and modelling the values generated for the voltages which will be measured between the two or more points with a current applied to the location at a first and at least at a second time.

Abstract: A method for analyzing a plurality of amino acids in a fluid sample by a user is provided comprising the steps of introducing the sample into a buffer solution, passing the sample in the buffer solution through a separation column and setting a lithium ion concentration in the buffer to no more than 0.3 mols/L up to a time before ?-aminoisobutyric acid (?-AiBA) is eluted.

Abstract: The present invention relates to a method for inhibiting stress corrosion cracking occurring on steam generator tubes in the secondary side of nuclear power plants and an inhibitor therefor. The method comprises supplying lanthanum boride as an inhibitor for stress corrosion cracking into the secondary feed water of the nuclear power plants. The method according to the present invention improves the resistance of stress corrosion cracking ten times or higher than no inhibitor, and five times or higher than the conventional inhibitor. In particular, the method according to the present invention shows a superior inhibiting effect in the lead-contaminated environment such that the complete inhibition of stress corrosion cracking can be achieved. As thus, the method can reduce the unexpected stop of operating nuclear power plants caused by the stress corrosion cracking on steam generator tubes, thereby reducing the cost required for maintaining and repairing the tubes.

Abstract: A system for measuring pitting corrosion in metal using a digital camera having a lens and an output unit for identifying the color of a metal coupon on a gray scale and providing an output in the midrange of the scale when non corroded and different output after exposure to a corrosive environment. A computer is connected to the output of the camera to display the photographs to permit observation of the gray scale output based upon a minimum and maximum threshold inputs which are adjustable based on an observation of pitting. The points of interest on the coupon representing observed pitting are recorded and summed to calculate an estimated corrosion area corresponding to pitting the said coupon as a percentage of the total coupon area.

Abstract: A digital image processing-based system and method for quantitatively processing a plurality of nucleic acid species expressed in a microarray are disclosed. The microarray is a grid of a plurality of sub-grids of the nucleic acid species. The system includes a scanner that has a digital scanning sensor that scans the microarray and transmits from an output a digital image of the microarray, and a processor that receives the digital image of the microarray from the scanner and then processes the digital image, identifying each of the microarray's sub-grids. The processor then detects in each of the sub-grids a center-representing pixel of a signal of a chemical material and an approximate radius of the signal. Then, the processor segments the signal and calculates a characterizing measure for the segmented signal.

Abstract: A weathering test method comprising making active oxygen and light simultaneously act on a test piece, a weathering test method comprising successive and/or alternate steps of making active oxygen and light simultaneously act on a test piece and making at least one of light, oxygen, and water to act on the test piece, and apparatus for carrying out the methods are disclosed. In evaluating weatherability of organic materials, articles made of organic materials or articles coated with organic materials, the methods and apparatus achieve acceleration of deterioration of test pieces to greatly reduce the testing time.

Abstract: A weathering test method comprising making active oxygen and light simultaneously act on a test piece, a weathering test method comprising successive and/or alternate steps of making active oxygen and light simultaneously act on a test piece and making at least one of light, oxygen, and water to act on the test piece, and apparatus for carrying out the methods are disclosed. In evaluating weatherability of organic materials, articles made of organic materials or articles coated with organic materials, the methods and apparatus achieve acceleration of deterioration of test pieces to greatly reduce the testing time.

Abstract: A weathering test method comprising making active oxygen and light simultaneously act on a test piece, a weathering test method comprising successive and/or alternate steps of making active oxygen and light simultaneously act on a test piece and making at least one of light, oxygen, and water to act on the test piece, and apparatus for carrying out the methods are disclosed. In evaluating weatherability of organic materials, articles made of organic materials or articles coated with organic materials, the methods and apparatus achieve acceleration of deterioration of test pieces to greatly reduce the testing time.

Abstract: A method is provided for preparing preservative-free allergen test solutions in a prepared sterile environment. A sterile environment is prepared by utilizing a disinfectant wipe and a sterile barrier field. An antigen is added to a diluent to form a solution of the antigen by dispersing or suspending the antigen in the diluent. The solution is subjected to triple filtration under specific and sequential conditions to provide consistent and preservative-free allergen test solutions. Shelf life is extended by storing the solution at a temperature below 5° F. or by lyophilizing the allergen test solution.

Abstract: The present invention relates to a method for inhibiting stress corrosion cracking occurring on steam generator tubes in the secondary side of nuclear power plants and an inhibitor therefor. The method comprises supplying cerium boride as an inhibitor for stress corrosion cracking into the secondary feed water of the nuclear power plants. The method according to the present invention improves resistance of stress corrosion cracking three times or higher than no inhibitor, and two times or higher than the conventional inhibitor. In particular, the method according to the present invention shows a superior inhibiting effect in the lead-contaminated environment such that the complete inhibition of stress corrosion cracking can be achieved. As thus, the method can reduce the unexpected stop of operating nuclear power plants caused by the stress corrosion cracking on steam generator tubes, thereby reducing the cost required for maintaining and repairing the tubes.

Abstract: An article of manufacture forms a tool for determining cleaning parameters of an oxide removal process. The article comprises a block of material upon which an oxide can be formed and a simulated defect structure disposed in the block of material. The article is capable of determining oxide removal parameters of an oxide removal process by disposing an oxidized standard in a reactor, conducting an oxide removal process to remove oxide from the standard, and evaluating the standard and simulated defect structure for remaining oxide and other oxide removal parameters.

Abstract: Patent of invention “PROCESS FOR METERING HYDROGEN PERMEATED IN A METALLURGICAL STRUCTURE, AND APPARATUS THEREOF”, refers to a process for metering permeated hydrogen flow in machines, equipment, piping, or other metallic apparatus, used in the oil industry, refineries, chemical industries, petrochemical industries, units for production, pumping, transport, and storage of petroleum and gas, tanks, machines, and equipment that work with hydrogen, or chemicals that can generate hydrogen, and nuclear industries, through a sensor that uses the properties of a couple of dissimilar materials, in construction and installation that are suitable to measure electrical values between a metering couple and a reference couple. The measured value is a function of the flow rate of hydrogen that permeates the metallic surface under monitoring.

Abstract: The mill comprises a cylindrical shell ring (10) revolving about its longitudinal axis and containing a grinding charge comprising grinding bodies made of metal alloy. At least one grinding body (30) identical to those that make up the grinding charge is fixed to an elastomer or rubber pedestal (28), itself fixed to the interior surface of the shell ring. This grinding body (30) is exposed to the conditions inside the mill and is associated with a reference electrode (36) from which it is electrically insulated. This reference electrode (36) is protected from the impact knocks of the charge in the mill but is in electrical contact with the pulp in the mill, the said grinding body (30) and the said electrode (36) being electrically connected to measurement apparatus (18) fixed inside the shell ring of the mill.

Abstract: A fluid interface port in a microfluidic system and a method of forming the fluid interface port is provided. The fluid interface port comprises an opening formed in the side wall of a microchannel sized and dimensioned to form a virtual wall when the microchannel is filled with a first liquid. The fluid interface port is utilized to fill the microchannel with a first liquid, to introduce a second liquid into the first liquid and to eject fluid from the microchannel.

Abstract: A weathering test method comprising making active oxygen and light simultaneously act on a test piece, a weathering test method comprising successive and/or alternate steps of making active oxygen and light simultaneously act on a test piece and making at least one of light, oxygen, and water to act on the test piece, and apparatus for carrying out the methods are disclosed. In evaluating weatherability of organic materials, articles made of organic materials or articles coated with organic materials, the methods and apparatus achieve acceleration of deterioration of test pieces to greatly reduce the testing time.

Abstract: The present invention provides a method for the acoustic ejection of fluid droplets from each of a plurality of fluid-containing reservoirs to prepare combinatorial libraries in the form of microarrays. An acoustic ejection device is used comprised of a plurality of fluid reservoirs, an ejector for generating acoustic radiation and the acoustic radiation at a focal point near the fluid surface in each of the reservoirs, and a means for positioning the ejector in acoustically coupled relationship to each of the reservoirs. The combinatorial libraries may comprise biological or nonbiological moieties.

Abstract: The present invention relates to an electric resistance sensor for measuring a corrosion rate, and in particular to an electric resistance sensor for measuring a corrosion rate which can measure a slight corrosion resulting from pitting by using a plurality of conductive thin lines, a fabrication method therefor and a measurement method using the same.

Abstract: A method for predicting perforation corrosion in a hem flange. The method includes placing an electrode in the hem flange. The electrode extends substantially the entire length of the hem flange. An electrolyte is introduced into the hem flange so that the electrode is immersed, and the electrochemical impedance spectrum of the hem flange is measured. The measured electrochemical impedance spectrum of the hem flange can be compared to a reference electrochemical impedance spectrum. A collection of reference electrochemical impedance spectra can be created by storing the measured electrochemical impedance spectrum of the hem flange.

Abstract: Thin film thermal oxidative engine oil or other oleaginous liquid deposit device has an oleaginous test liquid placement volume; a heatable depositor surface in liquid communication with the volume; a supply for at least one of an oxidant and another substance which can adversely affect the test liquid; and a relatively thin film forming unit which delivers the test liquid to the depositor surface in a relatively thin film. Thin film thermal oxidative engine oil or other oleaginous fluid deposit method is also provided, which includes providing an oleaginous test liquid in an oleaginous test liquid placement volume; providing a depositor surface and heating said surface; delivering the test liquid as a relatively thin film to the heated depositor surface; providing to the test liquid an oxidizing and/or other substance which can adversely affect the test liquid; and observing any deposits or other activity thereabout. The invention is useful in oil testing.

Abstract: A packer joint is provided for mounting on a vessel or pipeline entry valve which includes a stinger guide and seal. Clamping collet are mounted within the packer to retain the stinger in the desired position. Different metals within the guide body from those of the stinger rod prevent gaulding and damage. A lock-up the rod may be released via a bore hole providing tapping access to the collets.

Abstract: A method for determining corrosiveness of naphthenic acid in a fluid includes the steps of: providing a fluid containing naphthenic acid; providing iron powder having a surface area of at least about 0.01 m2/g; contacting the fluid and the powder for a period of time so as to provide a portion of the iron as dissolved iron dissolved in the fluid; and measuring iron concentration of the fluid containing the dissolved iron, so as to provide a measure of corrosion potential of the naphthenic acid over the period of time.

Abstract: An electrode component group for a corrosion measuring system for detecting corrosion of a metal embedded in a construction component of ion-conducting material has a rod-shaped base body having a first flange member at a first end of base body and a second flange member at a second end of base body. The base body is insertable into the construction component with the first end leading. A plurality of spacer rings is positioned on the base body between the first and second flange members. The metal electrode rings and sealing rings are arranged alternatingly between the spacer rings. Each one of the metal electrode rings have an electrical line connected to a measuring circuit external to the construction component. The electrical lines are guided inside the metal electrode rings to the second end of the base body. A device for reducing a spacing between the first and second flange members is provided.

Abstract: The invention relates to the study and the manufacture of lubricants used in particular in diesel engines. According to the invention, the neutralization capacity of a lubricant comprising detergent additives is determined by a method which consists in reacting, in a leaktight tank, at a constant temperature, the bases contributed by the additives present in a lubricant film of known mass with a predetermined amount of a liquid acid and in recording, as a function of the time, the values of the pressure within the leaktight tank, and in then determining, from the recorded values of the pressure, at lest one of the following three characterizing parameters: an initiation period for the reaction, a neutralization potential and a reaction rate. The invention finds its application in research and control laboratories of manufacturers of lubricants and in those of engine manufacturers.

Abstract: A lysis chamber of an assay device capable of producing lysis of cells in a sample fluid such as whole blood, said chamber comprising a surface which contacts the sample fluid when the sample fluid is placed into the assay device; and a lytic material immobilized on the surface, whereby cells of the sample fluid are lysed when they contact the lytic material. The chamber can delimit a capillary space, and lytic material can be saponin or a detergent. Methods employing devices comprising such chambers can assay for whole blood amounts of cyclosporin or hemoglobin A1c.

Abstract: A high temperature fouling test unit is provided. The fouling test unit includes a flow tube with a fouling probe received within the flow tube. The fouling probe includes a heated section. An annular passage is defined between the fouling probe and the flow tube. An impeller is mounted within the flow tube for inducing fluid flow within the annular passage. A plurality of temperature responsive devices monitor a rate of heat transfer and a change in fluid temperature through the annular passage.

Abstract: Apparatus and methods for monitoring localized or pitting corrosion of metal or other material are described. A probe having a working electrode made of the same material as the material being monitored is located in the same corroding environment as the material being monitored. The electrochemical noise detected between the working electrode and other electrodes is processed to provide an indication of the state of localized corrosion of the material being monitored. An anodic bias voltage is applied to the working electrode. This bias voltage accentuates localized corrosion at the working electrode, improving sensitivity and permitting more accurate evaluation of the electrochemical noise signals.