Class / Patent application number | Description | Number of patent applications / Date published |
205775500 | For corrosion | 29 |
20080283418 | Quantitative Transient Analysis of Localized Corrosion - An electrochemical noise method, apparatus and system may be used to estimate and/or calculate parameters of interest related to corrosion rates of an electrically conductive article. The apparatus involves a working electrode (having substantially the same composition of the electrically conductive article), a reference electrode, and a counter electrode in an environment of interest. The working electrode is placed under potentiostatic control. A current transient between the working electrode and the counter electrode is measured. The working electrode is switched to open potential. A potential transient is measured over the duration of a localized corrosion event. The localized corrosion may then be calculated based on the measured potential transient and the current transient. | 11-20-2008 |
20090184003 | Localized Corrosion Monitoring Device for Limited Conductivity Fluids - A localized corrosion monitoring (LCM) device is modified to obtain polarization resistance (R | 07-23-2009 |
20100000879 | ELECTROCHEMICAL NOISE AS A LOCALIZED CORROSION INDICATOR - Systems and methods are presented for a method for measuring or monitoring localized corrosion in which an electrochemical noise (ECN) signal is sensed and filtered by a high-pass or band-pass filter to remove low frequency components not related to localized corrosion and a standard deviation of the filtered signal is computed and scaled to provide a localized corrosion value. | 01-07-2010 |
20100155262 | APPARATUS AND METHOD TO MEASURE ELECTROCHEMICAL IMPEDANCE - An electrochemical cell apparatus and method comprising a first electrode and a second electrode wherein the area ratio between them is 15 or higher, for example a metal plate and a metal wire; wherein said first and second electrodes are made from the same material; and wherein the distance between said first electrode and said second electrode is in the range of from about 1 mm to about 1 μm is provided. Such electrochemical cell can be used to measure crude oil corrosion using an electrochemical impedance method. | 06-24-2010 |
20110011751 | CABLE INSERTION FOR CORROSION SENSORS - A method and apparatus for sensing corrosion comprises a casing and a counter-electrode. The casing is made of material that is substantively incompressible at pressures on wires within a structural cable. The casing has a thickness that is not greater than typical interstitial spaces between wires of the structural cable and has a length on an order of a radius of the structural cable. The counter-electrode exchanges electrons with ions of an electrolyte that corrodes the wires of the structural cable. The counter-electrode is embedded in the casing, is exposed to the electrolyte in a window of the casing, and is recessed to avoid contact with any wire of the structural cable when the sensor is deployed among the wires of the structural cable. | 01-20-2011 |
20120055810 | SOLID-STATE ELECTROCHEMICAL SENSOR - A method and system for corrosion detection. The system may comprise an electrochemical sensor having a working electrode, a reference electrode, a counter electrode, and a polymer electrolyte film containing redox pairs. The electrochemical sensor may further be engaged with a guide element. A console may be included, the console being coupled to the guide element and in electrical communication with the electrochemical sensor. | 03-08-2012 |
20120186995 | SYSTEM AND METHOD FOR PERFORMING A POLARIZATION SCAN IN SITU - A system for performing an in-situ polarization scan of a component surface includes a sensor connected to the component surface at a sensor connection, and the sensor generates a signal reflective of a current flow at the sensor connection. A power supply connected to the component surface at an electrical connection produces a voltage potential at the electrical connection. An electrolyte coats the sensor connection and the electrical connection. A method for performing an in-situ polarization scan of a component surface includes sensing a current flow on the component surface, generating a voltage potential on the component surface, and placing an electrolyte over at least a portion of the component surface. | 07-26-2012 |
20120247975 | SYSTEM AND METHOD FOR DETECTING A LIKELIHOOD OF CORROSION - A system may be used to detect corrosion between a first metal and a second metal, where the second metal is positioned adjacent to the first metal. The system may include a processor electrically coupled to each of the first and the second metals and configured to monitor a complex impedance between the first metal and the second metal, where the complex impedance may include a real component and an imaginary component. The processor may compare the real component of the complex impedance to a first threshold, compare the imaginary component of the complex impedance to a second threshold, and indicate a likelihood of corrosion if at least one of the real and imaginary components are below their respective threshold. | 10-04-2012 |
20130037420 | METHOD AND APPARATUS FOR DETECTING MOISTURE ON METAL AND OTHER SURFACES, INCLUDING SURFACES UNDER THERMAL INSULATION - Systems and methods are disclosed for detecting the presence of water on or in pipelines, tanks, equipment and other structures, including insulated structures which may be subject to corrosion under insulation, or CUI. Two dissimilar, spaced-apart metals are coupled at least indirectly to a structure to be monitored, and apparatus for detecting a potential difference between the two dissimilar metals, thereby indicating that water is present as an electrolyte. In CUI applications, at least one of the dissimilar metals is attached to, or embedded within, a water-absorbing insulator or other material coupled to or surrounding the structure. The water-absorbing material may be provided in the form of a tape attached to the surface of a metal component fanning the structure. In some embodiments, the structure to be monitored may itself incorporate a ferrous metal component which is used as one of the dissimilar metals. | 02-14-2013 |
20130292265 | IMPRESSED CURRENT CATHODIC PROTECTION - An impressed current cathodic protection arrangement includes an elongate metallic structure to be protected and cathodic protection apparatus which comprises a DC power supply and an anode. One terminal of the power supply is connected to the structure at a connection point and another terminal of the power supply is connected to the anode. The arrangement includes monitoring apparatus for monitoring effectiveness of cathodic protection provided by the cathodic protection apparatus by determining the electrical potential of the structure relative to surroundings at at least one location which is spaced from the connection point. | 11-07-2013 |
20150068921 | METHOD OF MONITORING CORROSION POTENTIAL OF ENGINEERING ALLOYS IN AQUEOUS SYSTEMS - 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. | 03-12-2015 |
20150308979 | SEQUENCER SYSTEM FOR DATA COLLECTION OF CORROSION SPECIMENS - The sequencer system for corrosion data collection of specimens includes a container for holding a plurality of specimens to be tested. During testing, the container holds a solution bath. A reference electrode and a counter electrode are coupled to a potentiostat, both electrodes being operationally disposed inside the container. A sequencer is connected to each specimen via a working electrode line. The sequencer operates in concert with the potentiostat to switch between a tested specimen and a subsequent specimen to be tested during a pause phase between each polarization cycle of the potentiostat. A computer is coupled to the potentiostat and the sequencer, and a program controls synchronized operations between the potentiostat and the sequencer. The program also permits automatic data collection for each of the specimens. | 10-29-2015 |
20150362424 | METHOD AND DEVICE FOR CORROSION TESTING OF SOLAR CELLS - Corrosion effects in a solar cell are measured by means of a conduit with electrolytic fluid. The rim of an open end of the conduit is placed against the surface of the solar cell to expose a selected area of the solar cell to the electrolytic fluid, leaving a free part of the planar surface of the solar cell outside the exposed area. Current and/or voltage fluctuations are measured in an electric circuit that contains the electrolytic fluid, an interface between the electrolytic fluid on the exposed area and a conductor layer on the planar surface, and a contact to the conductor layer in the free part. | 12-17-2015 |
20160187287 | Determination Device for Determining Antirust Effect of Treated Water and Method for Determining the Same - A determination device capable of easily and quickly determining an enhancement in rust-prevention of treated water and a method for determining the same are provided. The device has first and second potential difference measurement devices, each including at least one anode electrode, a pair of cathode electrodes, a first current generator for applying an electric current between the anode and a first cathode of the pair, a second current generator for applying an electric current between the anode and a second cathode, an electric current changer for periodically changing a magnitude of a current between the first and second cathodes, a measurement/output equipment for measuring a potential difference across the first and second cathodes, and a determiner for determining antirust effect of treated water based on signal A outputted by the equipment of the first potential difference measurement device and signal B outputted by that of the second device. | 06-30-2016 |
205776000 | Testing by internal battery action | 2 |
20110100841 | Corrosion Testing of Fuel-Cell Separator Plate Materials - In one example, a specimen is immersed in an electrolyte, and a plurality of potentials of the specimen are experimentally related to a plurality of currents by applying the potentials to the specimen while measuring the currents, or, by drawing the currents through the specimen while measuring the potentials. The potentials are referenced to a hydrogen reference electrode. Hydrogen is supplied to the hydrogen reference electrode via an electrolysis cathode distinct from the hydrogen reference electrode. | 05-05-2011 |
20120261272 | CORROSIVE ENVIRONMENT SENSOR AND METHOD FOR MEASURING CORROSIVE ENVIRONMENT - A corrosive environment sensor for measuring corrosive environment inside a space between a first member that is a conductor and a second member that is a conductor or insulator includes: a base having a surface which cam face the first member that is a conductor; and an electrode which is provided on the surface of the base and formed with a material different in ionization tendency from the first member and which faces at a distance the first member so as to form a galvanic coupling with the first member, and the corrosive environment sensor measures a galvanic current between the electrode and the first member. | 10-18-2012 |
205776500 | Of coating, coated substrate, or imbedded object | 13 |
20090000958 | Synergistic Combinations of Chromate-Free Corrosion Inhibitors - An anti-corrosive composition, comprising a combination of at least two of the following materials: vanadates, molybdates, tungstates, silicates, phosphates, borates. Ce cations, Y cations, La cations, Eu cations, Gd cations, Nd cations, and reaction products thereof. | 01-01-2009 |
20090101522 | High Temperature Electrochemical Characterization of Molten Metal Corrosion - A system and method for the high temperature in-situ determination of corrosion characteristics of a molten metal on an alloy under study is provided which takes place within an insulated furnace. A graphite crucible provided in the furnace contains an electrolyte formed from a molten salt of a metal halide. A reference electrode formed from the same metal as the electrolyte is immersed in the electrolyte solution in the graphite crucible. A beta-alumina crucible containing a molten metal is also provided within the furnace and preferably within the graphite crucible. A measuring electrode formed from the alloy under study is immersed in the molten metal. Standard electrochemical techniques are used to measure and analyze the electrochemical effects of corrosion of the molten metal on the alloy. | 04-23-2009 |
20110210014 | CORROSION SENSOR SYSTEM - A corrosion sensor system includes a substrate with a hydrophilic coating and a sensor array attached to the substrate, the sensor array manufactured of a noble metal. The sensor system operates to determine a time of wetness measurement based upon an electrolyte conductivity and a temperature. | 09-01-2011 |
20110297553 | MOUNTABLE ELECTRODE - The invention is directed to a mountable electrode, methods for preparing said mountable electrode, a method for monitoring the corrosion protective properties of a coating on a metal substrate, a method for measuring the corrosion rate of an uncoated metal substrate, an apparatus for measuring electrochemical impedance spectroscopy of coated metal substrates, and the use of said mountable electrode. The mountable electrode of the invention comprises -a carrier comprising a water-soluble layer, wherein said water-soluble layer comprises a water-soluble polymer; and -a water-permeable pattern of an inert metal on said water-soluble layer. | 12-08-2011 |
20110308969 | REDUCING CORROSION AND WATER DECOMPOSITION ON A SURFACE OF A TITANIUM NITRIDE ELECTRODE - The present invention provides a method of reducing corrosion and water decomposition on a surface of an electrode having a titanium nitride conductive layer disposed on a substrate and estimating extent of reduction thereof. The electrode is immersed into a solution containing a hydroxyl-functional compound. Thereafter, a voltage is applied to the titanium nitride conductive layer of the electrode. The extent of oxidation of the titanium nitride conductive layer is correlated with the extent of formation of oxide of titanium nitride and/or the extent of oxidation of the titanium nitride conductive layer is correlated with the increase of surface roughness. The extent of water decomposition is correlated with formation of hydrogen and oxygen bubbles. | 12-22-2011 |
20120080325 | METHOD AND DEVICE FOR DETERMINING THE LOCATION OF CORROSION SITES IN REINFORCED CONCRETE - The invention relates to a method for determining the location of the corrosion sites in reinforced concrete, wherein a value (UB, UC) of a voltage potential (UB, UC) present at each measurement location is measured at at least two measurement locations relative to a reference voltage potential (UA) present at a reference location, and information about the direction to the corrosion site (K) and/or the distance to the corrosion site (K) is determined from the location information (XB, YB, XC, YC) for each measurement location, particularly also the reference location, and the voltage potential (UA, UB, UC) present at each location. The invention further relates to a device for determining the location of corrosion sites in reinforced concrete, particularly according to a method according to one of the previous claims, comprising an electrode arrangement having at least one electrode that can be brought into electrolytic contact with the surface of a reinforced concrete to be tested, and that is set up for measuring voltage potentials (UB, UC) using the at least one electrode at a plurality of measurement locations relative to a reference voltage potential (UA) at the reference location of an electrode, and that is further set up for determining information about the direction to the corrosion site (K) and/or the distance to the corrosion site (K) from the location information (XB, YB, XC, YC) for each measurement location, particularly also the reference location, and the voltage potential (UA, UB, UC) present at each location. | 04-05-2012 |
20120132541 | SUB-COATING COATED METAL CORROSION MEASUREMENT - A system and method for generating and collecting data to detect and evaluate corrosion in a conductive metal beneath a protective coating is disclosed. A semi-integrated electrode having a reference electrode and a counter electrode is connected to a portable hand held device, such as a portable potentiostat generator. That device is also connected electrically to the metal being evaluated with the metal forming a working electrode. The counter electrode is physically and electrically separate from the metal, and a signal or voltage potential is provided therebetween through an electrolyte solution, such as sea water. The system and method is practiced without need for a container for an electrolyte solution. Data are collected and displayed indicating corrosion. | 05-31-2012 |
20130008801 | METHODS AND COMPOSITIONS FOR APPLICATIONS RELATED TO MICROBIOLOGICALLY INFLUENCED CORROSION - Methods and compositions for applications related to the microbiologically influenced corrosion (MIC) are provided. MIC is becoming increasingly important, especially to the oil and gas industry due to water flooding practice and aging pipelines. The lack of understanding of the fundamental mechanisms in MIC have greatly hindered the development of reliable prediction and new mitigation methods. This disclosure demonstrates how a biocatalytic cathodic sulfate reduction (BCSR) theory, together with bioenergetics, electrochemical kinetics, and mass transfer, can be used with regard to MIC. The discovery of MIC promoters (that are electron mediators) allows for a new detection tool for more accurate assessment of MIC pitting, and potential new mitigation methods that targets the promoters or microorganisms that secrete these promoters. An MFC device to detect the presence of MIC promoters is provided. When accelerated MIC pitting is desired, such as destruction of undersea munitions or accelerated MIC lab tests, MIC promoters can be added. | 01-10-2013 |
20140048424 | METHODS AND DEVICES FOR THE DETECTION OF BIOFILMS - Methods and devices for the detection of corrosive biofilms and microbiologically influenced (MIC) corrosion rates are based upon the electrogenicity of the biofilms. The device may comprise a passive sensor having at least one first electrode, at least one second electrode, and an external circuit for electrically connecting the first electrode to the second electrode. At least one of the first electrode and the second electrode is capable of being at least partially coated by a biofilm. A sustainable electrical characteristic, such as voltage and current, generated when the first electrode and the second electrode are electrically connected and exposed to at least one medium indicates that the biofilm partially coating at least one of the first electrode and the second electrode is electrogenic, and thus corrosive. Special electrode and sensor designs are needed for the implementation of online and offline biofilm sensors. | 02-20-2014 |
20140090987 | METHOD FOR EVALUATING CORROSION RESISTANCE OF CANS TO CONTENTS - A method to evaluate the corrosion resistance of a can to a content includes filling the can with the content to form a specimen, setting the specimen in an apparatus capable of blocking an outside atmosphere from entering the specimen, optionally saturating the content with nitrogen gas to expel dissolved oxygen present in the content, thereafter while maintaining the temperature of the content at a constant temperature in the range of 25 to 60° C., applying a constant potential that is more anodic than an immersion potential by 50 mV to 200 mV to the can of the specimen, and evaluating the corrosion resistance of the can to the content based on the accumulated amount of electricity generated during a time appropriately selected from 6 to 48 hours immediately after the application of the constant potential. | 04-03-2014 |
20140097096 | PROCESS OF EVALUATING CORROSION RESISTANCE - The present invention is directed to a process for evaluating corrosion resistance of coated metals substrates, such as autobodies at an accelerated rate. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in triangular, truncated triangular or trapezoidal manner for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days). | 04-10-2014 |
20140174946 | SYSTEM AND METHOD FOR ESTIMATING IMPEDANCE IN ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY - The method for estimating impedance in electrochemical impedance spectroscopy is an iterative method, combining high order statistic (HOS) deconvolution and adaptive filtering (AF) to estimate impedance in electrochemical impedance spectroscopy for such applications as measuring the degree of electrolytic corrosion in a coated metal pipe, for example. | 06-26-2014 |
20160053398 | Graphene Anti-Corrosion Coating and Method of Application Thereof - A graphene composite coating on a metal surface with excellent corrosion resistance by electrophoretic or electrolytic deposition has been obtained. The composite coating was shown to significantly increase the resistance of the metal surface to electrochemical degradation. | 02-25-2016 |