NO344047B1 - Improved FSM corrosion measurement - Google Patents
Improved FSM corrosion measurement Download PDFInfo
- Publication number
- NO344047B1 NO344047B1 NO20161555A NO20161555A NO344047B1 NO 344047 B1 NO344047 B1 NO 344047B1 NO 20161555 A NO20161555 A NO 20161555A NO 20161555 A NO20161555 A NO 20161555A NO 344047 B1 NO344047 B1 NO 344047B1
- Authority
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- Norway
- Prior art keywords
- sheet
- metal structure
- studs
- apertures
- numerous
- Prior art date
Links
- 238000005260 corrosion Methods 0.000 title claims description 15
- 230000007797 corrosion Effects 0.000 title claims description 15
- 238000005259 measurement Methods 0.000 title description 7
- 239000002184 metal Substances 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000003491 array Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 8
- 150000003071 polychlorinated biphenyls Chemical class 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000011161 development Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 2
- 230000001747 exhibiting effect Effects 0.000 claims 7
- 238000001311 chemical methods and process Methods 0.000 claims 2
- 238000012806 monitoring device Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
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
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/20—Investigating the presence of flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing
- G01N27/61—Investigating the presence of flaws
Description
The present invention concerns a device for measuring corrosion in metal structures in accordance with the preamble of claim 1 and 5, and a method of assembling the device to a metal structure in accordance with the preamble of claim 9.
Background
When using the Field Signature Method (FSM) in monitoring corrosion development in metal structures, such as pipelines or process equipment in processing plants, an array of electrically conductive pins are attached to the surface of the metal structure to be monitored. The pins are typically arranged in mutual distance of two to three times the wall thickness of the metal structure to be monitored. During corrosion monitoring, a measurement is performed by applying an induced current to the respective pins in the array, whereupon the voltage response is measured and compared to a reference voltage response, e.g. a voltage response pattern taken from an initial state without any corrosion.
The corrosion monitoring is performed by taking measurements at selected intervals for a prolonged period of time, e.g. daily or weekly measurements during several months or years. An increased voltage response at a certain point in time indicates increased electrical resistance, e.g. caused by surface corrosion in the metal structure. The rate of change in voltage response between consecutive measurements can provide information about how fast the corrosion is developing. Moreover, the location of the corrosion can be determined from voltage response changes in one or more parts of the pin array. The accuracy or resolution of the measurements is determined by the distance between adjacent pins, and the resolution decreases by increasing distance between the pins.
However, the FSM principle is subject to certain drawbacks. Firstly, the assembly is typically performed on site, e.g. on the outer surface of a pipe in a refinery, and requires about two days to complete. Secondly, every single pin in the array, e.g. of 128 pins, is welded to the pipe wall and connected to the source of current. This manual assembly is prone to errors and there is a risk that one or more pins are not properly connected electrically conductive to the pipe surface, thus producing an incomplete monitoring of the pipe.
Object
Accordingly, there is a need for a device of this kind that enables a faster assembly on site at the structure to be monitored. There is also a need for a device that enables a more reliable monitoring of the metal structure.
The invention
The objects above are obtained by a device in accordance with the characterizing part of claim 1 and 5, and a method in accordance with the characterizing part of 9. Further advantageous features appear from the respective dependent claims.
Definitions
The term “stud” is in this context meant to define an electrical connection between the metal surface to be monitored and the electrical connection to a control and measuring device. Accordingly, the term “stud” includes, but is not limited to, electrically conductive pins or similar.
The term “array” is in this context meant to describe a pattern of objects (including studs) arranged in a predetermined layout, regular, partly regular as well as irregular. With respect to the apertures in the respective sheets, the term “array” is meant to identify the general layout of the apertures.
The term “sub array” is in this context meant to define a predetermined arrangement of a subset of studs with regard to the total number of studs in an assembly, such as 8 studs out of 128. Each stud in the sub array is arranged electrically conductive to a common electrical interface with respect to the sub array.
The term “modular array” is meant to include all sub arrays of studs within the array as a whole.
In a first embodiment, the device according to the present invention comprises two flexible sheets, a first electrically insulating sheet provided with numerous through apertures in a desired calculated pattern, and a second flexible sheet provided with electrically conductive studs, arranged in a similar patterns as the apertures in the first flexible sheet, and in electrical connection with individual electrically conductive wires. The wires are arranged to be connected to a controller and to a voltage source.
In a second embodiment, the studs are not included in the second flexible sheet but are attached to the metal surface separately after the first flexible electrically insulating sheet has been applied to the metal structure to be monitored, whereupon the flexible modular array second sheet including electrically conductive wires can be applied upon the first sheet with the respective apertures in alignment with the affixed studs.
In a third embodiment, the second sheet is omitted, wherein the wiring is provided by a separate wiring assembly, where individual wires can be attached in an electrically conductive manner to the respective studs.
The first sheet is made of an electrically insulating flexible sheet material which is sustainable at temperatures ruling at the assembly site, for example a rubber material. The second sheet is made of a flexible material which per se is electrically insulating. Non-limiting examples of a flexible sheet substrate are polychlorinated biphenyls (PCB), glass fibre and carbon fibre.
The components described in general above can be designed and prefabricated, ready for fast assembly at the metal structure to be monitored. The present invention allows reduction of assembly time from several days as with the prior art devices, down to a few hours. The stud and controller arrangement also enables corrosion monitoring with a high reliability which heretofore as not been possible. The invention is described in further details below with reference to several embodiments.
Detailed description
In the following, the present invention is described in further detail by reference to example embodiments illustrated by drawings, wherein
Fig.1 is a perspective view of a part of the device in accordance with the invention assembled on a pipe,
Fig. 2 is a schematic illustration of the device in accordance with the invention assembled at a pipe,
Fig.3 is a cross-section through a pipe showing a first embodiment of the present invention,
Fig.4 illustrates a cross-section of the framed upper part of Fig.3 of the first embodiment,
Fig.5 is a drawing similar to Fig.3 of a second embodiment,
Fig.6 is a drawing similar to Fig.4 of the framed upper part of Fig.5 of the second embodiment.
First embodiment
Now referring to Fig. 1, a first preferred embodiment is described. A pipe section is illustrated at reference numeral 100, and an electrically insulating first sheet material 200 is wrapped around a substantial part of the periphery of the pipe 100, leaving a gap 202 extending along the longitudinal axis of the pipe 100. The first sheet 200 is attached to the pipe 100 by a first attachment means (not illustrated). A second sheet material 300, denoted as conductive sheet, second sheet or modular array sheet 300, is wrapped around the pipe 100, on top of the electrically insulating first sheet material 200 and attached to the pipe 100 by a second attachment means (not illustrated). The modular array sheet 300 is provided with numerous studs 400, arranged in numerous sub arrays R (Fig.1 and 2) in electrical connection with respective wires 500. The studs are arranged to be connected electrically conductive to the pipe 100. Accordingly, the studs 400 are arranged in a pattern comprising sub arrays R. Each sub array R of studs 400 comprises numerous studs 400 arranged at a mutual substantially equal distance. The respective studs in a sub array R are connected with electrically conductive wires (illustrated at 500 in Fig.2). In the example embodiment shown in Fig.1, each row or sub array R consists of a total of 8 studs. Further, the modular array sheet 300 comprises in the illustration about 20 rows or sub arrays R. The components comprising one modular array sheet provided with numerous sub arrays provided with electrically conductive wires is also denoted as a stud array module. An assembly may comprise one or more such stud array modules.
Figure 2 is a schematic representation of the device according to the present invention in an assembled state, as described in further detail below. One stud array module indicated in general by reference numeral 302 is wrapped around the electrically insulating first sheet 200. The stud array module 302 comprises numerous sub arrays R of studs. Each stud 400 is connected with a controller 600 via electrically conductive wires 500. The wiring of the remaining sub arrays R are omitted to simplify the illustration. The controller 600 and its function is in general known from the prior art and is not discussed in further detail here. However, in a preferred embodiment every single wire 500 in the arrangement is connected individually to individual interfaces within the controller, wherein the controller 600 is provided with executable algorithms that enables determination of the location of the respective studs.
Now referring to Figure 3, a schematic cross-section of the assembly of Figure 2 is shown, where the wiring has been omitted for clarity sake. Accordingly, the arrangement illustrated in Figures 1-3 shows numerous sub arrays R of studs arranged in a mutually equal distance about the periphery of the pipe 100, where each sub array R is arranged with their respective longitudinal axis coaxially with the pipe 100. It should be noted that this arrangement is not obligatory, and the respective sub arrays R can be arranged with their longitudinal axis at an angle with the longitudinal axis of the pipe 100. The respective sub array angles can be the same or different.
Figure 4 illustrates a cross-section of the framed part of Figure 4. A stud, indicated generally by reference numeral 400, is attached in an electrically conductive manner to the outer surface of the pipe 100. The stud 400 is welded into a contact area 101 with satisfactory electrical conductivity, formed in the pipe surface. The contact area 101 can be provided by grinding the outer surface of the pipe to remove rust or other deposits that may impair the electrical connection between the monitored pipe and the stud. Moreover, the stud 400 is extending through an aperture 201 formed in the electrically insulating first sheet 200 and through an aperture 301 formed in the modular array sheet 300, the latter being superimposed on the electrically insulating first sheet 200 with their respective apertures 201 and 301 formed in a similar arrangement and fixed in an aligned manner. An electrically conductive wire 500 provided on the modular array sheet 300 is arranged adjacent to the stem 401 of the stud 400, within the aperture 301 in the array sheet 300. A connection means is provided to ensure electrical connection between the stud 400 and the wire 500. Here, the connection means comprises a first nut 402 and a first washer 403 arranged about the stem 401, between the modular array sheet and the pipe 100, wherein the nut is in a threaded connection with the stem 401 (outer thread of the stem 401 is indicated by reference numeral 406 in Figure 4). Similarly, a second washer 404 and a second nut 405 are arranged in an electrically conductive manner about the stem 401 of the stud 400, but superimposed on the modular array sheet 300 and the wire 500. Accordingly, an electrical connection between the stud 400 and the wire 500 is in this embodiment obtained by tightening the nut 405 and establish electrical connection between the pipe 100, the first nut 402, the first washer 403 and finally the wire 500.
Assembly of preferred embodiment
The preparation and assembly of the preferred embodiment described above can be performed as described in the following.
Array modules 302 are prefabricated at the production facility by determining the designed array pattern and number of stds, and providing through apertures 301 in a flexible modular array sheet 300, in the desired number and pattern. Electrically conductive wires 500 are arranged adjacent to the respective apertures 301. Then, studs 400 are arranged in the respective apertures 301 and attached to the array sheet 300 including the connection means 402, 403, 404, 405. This can be performed by inserting a stem 401, with the first nut 402 and first washer 403 attached to the stem as described above, through the respective apertures 301 in the array sheet 300, and then attaching the stud 400 to the modular array sheet 300 by tightening the second washer and nut 404, 405.
Moreover, electrically insulating first sheets 200 are provided with apertures 201 in a similar number and pattern as the aperture arrangement in the second sheet 300.
In this manner, prefabricated array modules and insulating sheets can be provided in a large number of different patterns and array densities, ready for fast and simple assembly on site.
On the site where a metal structure, e.g. a pipe, is going to be monitored with respect to corrosion, the electrically insulating first sheet 200 is wrapped around an exemplary pipe 100 and fixed by a first attachment means (not illustrated). Then, a grinding tool is used to remove rust and deposits in the respective contact areas 101 in the pipe 100, in alignment with the apertures 201 in the electrically insulating first sheet 200. Alternatively, the metal surface is cleaned before applying the electrically insulating first sheet 200. Then, an array module 302 is wrapped around the electrically insulating sheet 200 and fixed by a second attachment means (not illustrated), with all of the apertures in the respective sheets aligned. Then, every single stud 400 is attached in an electrically conductive manner to the pipe 100 by welding with a welding tool known per se. Electrical connection between pipe 100 and wire 500 is secured by tightening the second nut 405 of the respective stud 400, whereupon the wires are connected to the controller 600.
The assembled device may now be tested by applying current to the respective stud 400 from the controller 600. Since the studs 400 preferably are provided with an individual connection with the logics in the controller 600, the exact position of faulty studs can be provided from the test procedure. This testing can be performed at all times and can even produce an alarm to personnel to issue a warning about need for maintenance or repair of faulty studs.
Technical effect
From the description above it should be evident to the person skilled in the art that the composition of the device in accordance with the present invention and its assembly and operation on the site being monitored enables a faster assembly on site: the assembly time can be reduced from about two working days down to a couple of hours. Moreover, the individual wiring arrangement enables assembly of a measurement device with high quality from reliability testing of every single stud after assembly. This reliability is even maintained through normal operation as well.
Accordingly, the novel device described above exhibits substantial technical effects that have not been obtained until now.
Second embodiment
A second embodiment is illustrated in Figures 5 and 6. While Figure 5 is similar to Figure 3, Figure 6 illustrates a partially assembled stud. In this embodiment the electrically insulating first sheet 200 as described in the first embodiment above is wrapped around the pipe 100 with the sheet apertures 201 aligned with clean contact areas 101 provided in the outer surface of the pipe 100 and fixed with an attachment means. Then, individual studs 400 are inserted trough the apertures 201 and welded to the respective contact areas 101 in the pipe surface.
After a desired number of studs 400 has been attached in an electrically conductive manner to the pipe 100, an array sheet 300 (second sheet) with a similar array of apertures 301 and wiring 500 is lowered and superimposed on the electrically conductive first sheet 200, whereupon electrical connection between pipe 100 and wiring 500 is obtained by tightening the attachment means as described above. Finally, the wiring is connected to the controller and the assembly is ready for testing as described above.
This second embodiment can be applied when the array sheet material is sensitive to heat from the stud welding process or heat from the operated (monitored) pipe. Accordingly, the second embodiment allows for use of more expensive array sheet material but may require more time to complete the assembly process on site since the studs must be handled and attached individually during assembly.
Third embodiment
In a third embodiment, the electrically conductive second sheet 300 is omitted and replaced by a set of wires provided with apertures. The assembly of the electrically insulating sheet 200 and studs 400 is as described above for the second embodiment. However, instead of superimposing an array sheet 300 on the electrically insulating first sheet 200, an a wiring array having wire ends provided with apertures is superimposed on the electrically insulating first sheet 200, whereupon electrical connection between pipe 100 and wiring 500 is obtained as described for the second embodiment above.
Modifications
In an assembly, the number of electrically insulating first sheets 200 does not necessarily correspond to the number of modular array sheets 300. Accordingly, an assembly can comprise more, equal to, or fewer modular array sheets 300 than electrically insulating first sheets 200.
Moreover, the electrical connection means to secure electrical connection between wire 500 and stud 400 is not limited to the exemplified nuts and washers 402, 403, 404, 405, and the person skilled in the art may easily replace the nuts and washers by a clamping means or similar.
Claims (12)
1. Device for monitoring corrosion development in a metal structure (100), particularly pipes and process equipment in refineries and chemical process plants, wherein the device comprises an array of electrically conductive studs (400) arranged in an electrically conductive manner to a selected surface of the metal structure (100), wherein the device further comprises a source of current, arranged to apply induced current to the respective studs (400), and a control device (600) arranged to record voltage response from the applied induced current, characterized in that the device comprises
an electrically insulating flexible first sheet (200) provided with an array of numerous through apertures (201) in a predetermined pattern, said first sheet (200) arranged to be attached to the metal structure (100) in a surface-to-surface contact by a first attachment means,
a second sheet (300) exhibiting an array of numerous through apertures (301) in a similar pattern as the first sheet (200), said second sheet (300) exhibiting electrically conducting studs (400) arranged in said apertures (301) and further exhibiting numerous electrically conductive wires (500) in electrical engagement with respective studs (400), said second sheet (300) arranged to be superimposed upon the first sheet (200) with the respective apertures (201; 301) aligned and attached to the metal structure (100) by a second attachment means, wherein the respective studs (400) will be in a metal-to-metal contact with the metal structure (100), and
numerous electrical connection means (402, 403, 404, 405) arranged at individual studs (400) to secure electrical engagement between the respective stud (400) and wire (500).
2. The device of claim 1, characterized in that the electrical wires (500) are provided as numerous sub arrays (R) comprising numerous individual wires to be connected.
2. The device of claim 1, characterized in that the first sheet (200) is made of a rubber material.
3. The device of claim 1, characterized in that the second sheet (300) is made of a flexible material selected from the group consisting of polychlorinated biphenyls (PCB), glass fibre and carbon fibre.
4. The device of claim 1, characterized in that the respective studs (400) are provided with an external thread (406), and wherein the electrical connection means comprises
a first nut (402) in a threaded connection with the external thread (406) of the stud (400); a first washer (403) superimposed on the first nut (402);
a second washer (404) superimposed on the first washer (402);
a second nut (405) in a threaded connection with the external thread (406) of the stud (400) and in contact with the second washer (403); wherein the respective electrical wire (500) is located between said first and second washer (403, 404).
5. Device for monitoring corrosion development in a metal structure (100), particularly pipes and process equipment in refineries and chemical process plants, wherein the device comprises an array of electrically conductive studs (400) arranged in an electrically conductive manner to a selected surface of the metal structure (100), wherein the device further comprises a source of current, arranged to apply induced current to the respective studs (400), and a control device (600) arranged to record voltage response from the applied induced current, characterized in that the device comprises
an electrically insulating flexible first sheet (200) provided with numerous through apertures (201) in a predetermined pattern, said first sheet (200) arranged to be attached to the metal structure (100) in a surface-to-surface contact by a first attachment means,
a second sheet (300) exhibiting numerous through apertures (301) in a similar pattern as the apertures (201) of the first sheet (200), said second sheet (300) exhibiting numerous electrically conductive wires (500) arranged to provide electrical engagement with respective studs (400), said second sheet (300) arranged to be superimposed upon the first sheet (200) with the respective apertures (201; 301) aligned and attached to the metal structure (100) by a second attachment means, wherein the respective studs (400) will be in a metal-to-metal contact with the metal structure (100), and
numerous electrical connection means (402, 403, 404, 405) arranged at individual studs (400) to secure electrical engagement between the respective stud (400) and wire (500).
6. The device of claim 5, characterized in that the first sheet (200) is made of a rubber material.
7. The device of claim 5, characterized in that the second sheet (300) is made of a flexible material selected from the group consisting of polychlorinated biphenyls (PCB), glass fibre and carbon fibre.
8. The device of claim 5, characterized in that the respective studs (400) are provided with an external thread (406), and wherein the electrical connection means comprises
a first nut (402) in a threaded connection with the external thread (406) of the stud (400); a first washer (403) superimposed on the first nut (402);
a second washer (404) superimposed on the first washer (402);
a second nut (405) in a threaded connection with the external thread (406) of the stud (400) and in contact with the second washer (403); wherein the respective electrical wire (500) is located between said first and second washer (403, 404).
9. A method of assembling a corrosion monitoring device according claim 1 at a metal structure (100) subject to corrosion, characterized in
- attaching the electrically insulating first sheet (200) to the metal structure (100), said first sheet (200) exhibiting numerous apertures (201) arranged in a predetermined pattern,
- providing numerous contact areas (101) in the outer surface of the metal structure (100), in said predetermined pattern, in alignment with the respective apertures (201) in the first sheet (200), said contact areas (101) exhibiting sufficient electrical conductivity,
- applying the second sheet (300) provided with numerous studs (400) arranged in said predetermined pattern, with its apertures (301) aligned with the apertures (201) of the first sheet (200) and the contact areas (101), and attaching the second sheet (300) to the metal structure (100) or to the first sheet (200),
- attaching the respective studs (400) to the contact areas (101) of the metal structure (100) in an electrically conductive manner,
- tightening the respective connection means (402, 403, 404, 405) to secure electrical connection between the metal structure (100) and the respective wire (500), and
- establishing electrical connection between the wires (500) and the controller (600) and the source of voltage.
10. The method of claim 9, wherein the contact area (101) is provided by grinding the surface of the metal structure (100) by a grinding tool to remove surface deposits impairing electrical conductivity between the metal structure (100) and the respective studs (400).
11. The method of claim 9, wherein the respective studs (400) are attached to the metal structure (100) in the respective contact areas (101) by welding.
12. The method of claim 9, wherein the electrical connection of every single stud (400) in the assemble device with the metal structure (100) is verified by a test procedure executed by the controller (600).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20161555A NO344047B1 (en) | 2016-09-28 | 2016-09-28 | Improved FSM corrosion measurement |
| PCT/NO2017/050239 WO2018062998A1 (en) | 2016-09-28 | 2017-09-21 | Device for monitoring corrosion development in a metal structure and a method for assembling said device to a metal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20161555A NO344047B1 (en) | 2016-09-28 | 2016-09-28 | Improved FSM corrosion measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20161555A1 NO20161555A1 (en) | 2018-03-29 |
| NO344047B1 true NO344047B1 (en) | 2019-08-26 |
Family
ID=61763497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20161555A NO344047B1 (en) | 2016-09-28 | 2016-09-28 | Improved FSM corrosion measurement |
Country Status (2)
| Country | Link |
|---|---|
| NO (1) | NO344047B1 (en) |
| WO (1) | WO2018062998A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201911983D0 (en) * | 2019-08-21 | 2019-10-02 | Prec Varionic International Ltd | Sensing element for monitoring condition of an article |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000050907A1 (en) * | 1999-02-22 | 2000-08-31 | Corrocean Asa | Sensoring device for monitoring potential on corrosion threated objects |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO150136C (en) * | 1982-04-19 | 1985-02-08 | Sentralinst For Ind Forskning | PROCEDURE AND DEVICE FOR MONITORING OF LARGE METAL CONSTRUCTIONS |
| FR2585129B1 (en) * | 1985-07-19 | 1988-07-08 | Centre Nat Rech Scient | METHOD AND DEVICE FOR DETECTING THE APPEARANCE AND QUANTIFYING THE EVOLUTION OF CRACKS ON THE SURFACE OF A MATERIAL |
| US5486767A (en) * | 1994-03-03 | 1996-01-23 | General Electric Company | Method and system for detecting defects in pipes or other structures |
| GB0005946D0 (en) * | 2000-03-14 | 2000-05-03 | British Nuclear Fuels Plc | Improvements in and relating to investigating corrosion |
| US6922641B2 (en) * | 2003-09-17 | 2005-07-26 | General Electric Company | System and method for monitoring defects in structures |
| NO330882B1 (en) * | 2009-07-03 | 2011-08-08 | Roxar Flow Measurement As | Method and apparatus for monitoring a zone of a metal structure |
| GB2498207A (en) * | 2012-01-06 | 2013-07-10 | Teledyne Ltd | Monitoring a conductive fluid conduit |
| NO339677B1 (en) * | 2015-03-03 | 2017-01-23 | Ferrx As | Method for detection of degradiation in metal structures |
-
2016
- 2016-09-28 NO NO20161555A patent/NO344047B1/en unknown
-
2017
- 2017-09-21 WO PCT/NO2017/050239 patent/WO2018062998A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000050907A1 (en) * | 1999-02-22 | 2000-08-31 | Corrocean Asa | Sensoring device for monitoring potential on corrosion threated objects |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018062998A1 (en) | 2018-04-05 |
| NO20161555A1 (en) | 2018-03-29 |
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