CN101451945A - Metallic material abysmal sea couple electric current multichannel test device - Google Patents
Metallic material abysmal sea couple electric current multichannel test device Download PDFInfo
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- CN101451945A CN101451945A CN 200810249620 CN200810249620A CN101451945A CN 101451945 A CN101451945 A CN 101451945A CN 200810249620 CN200810249620 CN 200810249620 CN 200810249620 A CN200810249620 A CN 200810249620A CN 101451945 A CN101451945 A CN 101451945A
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Abstract
The invention relates to a metal material blue sea couple current multichannel testing device, which belongs to the field of corrosive couple current situ automatic testing of metal materials in abyssal environment, wherein a couple sample is connected to mounting plates of an operational amplifier and a sensitive resistance, an reference electrode is connected to the mounting plates of the operational amplifier, two mounting plates of the operational amplifier and the sensitive resistance are respectively connected to two different ports of an expander board of a data acquisition unit, which is connected with corresponding port of the data acquisition unit. The operational amplifier, the sensitive resistance mounting plate, the operational amplifier mounting plate, the data acquisition unit mounting plate, the data acquisition unit expander board, the data acquisition unit and a data acquisition unit are mounted in a pressure hull, connected with an external couple sample and the reference electrode through a cable and a multicore cable. The device has the advantages of simple and compact complete machine structure, simple operation of laying and recovery, safe and reliable using performance, long service life.
Description
Technical field:
The invention belongs to the galvanic couple electric current original position automatic test technology field that metal material corrodes in deep-marine-environment, relate to a kind of metallic material abysmal sea couple electric current multichannel test device.
Background technology:
Some country has just begun the deep-marine-environment investigation corrosion of material as far back as the sixties in 20th century in the world.The U.S. had once carried out the material corrosion experimental study of multinomial deep-sea in marine site, the Pacific Ocean in the period of 1962～1970, the material that relates to has 475 kinds of alloys, 20,000 models, comprise various iron and steel, aldary, nickel alloy, stainless steel, aluminium alloy, titanium alloy, rare metal alloy, various metallic cable, and all kinds of ocean is with polymeric material, plastics, rubber, organic composite material etc.The exposure degree of depth is 780～2000m, and exposure duration is not wait in 125～1064 days.Content of the test comprises general corrosion, stress corrosion, weld decay, coated layer corrosion etc., and compares with the surface seawater test findings of carrying out simultaneously.Countries such as USSR (Union of Soviet Socialist Republics), Japan, Holland, Norway, India have also carried out deep-sea corrosion research work in succession.But; at present less about the report of deep-marine-environment corrosion electrochemistry in site measurement; Norway ocean technical institute carries out once regularly gathering parameters such as protection potential, protective current in the cathode protecting parameter research process of material deep-sea in the northern Norwegian Sea degree of depth is the marine site of 100～1335m, but does not have the report of pertinent instruments aspect.In domestic the Guo Weimin of ship heavy industry group the 725 research institute etc. once the invention instrument be used for the detection of deep-sea material current potential, but this invention does not relate to the measurement of current parameters.
Usually, bimetallic corrosion is known as contact corrosion or different metal erosion again, is difficult to avoid the combination of multiple material usually in deep-sea structural members such as oceanographic engineering and naval vessels, deep sea vehicle, so bimetallic corrosion is a kind of common local corrosion form.The potential measurement result does not reflect the polarization characteristic of metal, so can not directly obtain bimetallic corrosion speed.In addition, bimetallic corrosion is subjected to such environmental effects bigger, measures the galvanic couple electric current continuously in specific environment bimetallic corrosion degree and change information thereof can be provided, and for the validity of estimating best couple compatibility and safeguard measure significance is arranged.China has carried out artificial periodic measurement work to the galvanic series of kind of metal material in Sanya, Xiamen, Zhoushan and Qingdao natural sea-water surplus 70 once before and after the nineteen ninety.In recent years, also develop the bimetallic corrosion automatic data acquisition system, measured the corrosion potential and and the galvanic couple electric current of material in can shallow by the sea table seawater automatically.Present domestic deep-sea corrosion research is at the early-stage; as its important research contents, the bimetallic corrosion in-situ testing technique will provide strong technical support for metal material deep-sea corrosion mechanism research and the concrete compatibility application of material in deep-marine-environment etc. in the deep-marine-environment.
Summary of the invention:
The objective of the invention is to overcome the shortcoming that exists in the prior art; seek development and design a kind of can be under water 3000 meters the deep-marine-environment midium or long term, gather the proving installation of metal galvanic couple electric current in real time; can measure and gather the galvanic couple current data of 40 pairs of galvanic couple samples simultaneously; by the galvanic couple current data; measurement data in conjunction with the briny environment factor; obtain the bimetallic corrosion speed of different metal material in deep-marine-environment; and the best couple compatibility of metal material, for the use of different metal material under the condition of deep-sea provides foundation.
To achieve these goals, agent structure of the present invention comprises galvanic couple sample, sense resistance installing plate, sense resistance, data acquisition unit expansion board, electric battery, contrast electrode, operational amplifier installing plate, pressure hull, data acquisition unit, galvanic couple sample installation frame, polycore cable pressure-proof connector, operational amplifier and data communication interface; The galvanic couple sample is connected on operational amplifier and the sense resistance installing plate by cable, contrast electrode is connected on the operational amplifier installing plate, two installing plates of operational amplifier and sense resistance are connected respectively on the different port of data acquisition unit expansion board, the corresponding port with data acquisition unit of data acquisition unit expansion board links to each other, and data acquisition unit is by battery-powered; Associated components such as operational amplifier, sense resistance installing plate, operational amplifier installing plate, data acquisition unit expansion board, data acquisition unit and electric battery are installed in the pressure hull, link to each other with the contrast electrode electricity with outside galvanic couple sample with the polycore cable pressure-proof connector by cable.
Apparatus of the present invention are thrown in the back and are started working by time and frequency default in the data acquisition unit, and change frequency acquisition automatically after work a period of time, reduce power consumption, save power; Sense resistance and operational amplifier play the effect of zero resistance galvanometer and the input impedance of raising device during collection; By computer program control data collector, realize measuring automatically, storing automatically by setpoint frequency; Acquired data storage is in the built-in storer of data acquisition unit; After device reclaims, adopt the RS-232 mode to link to each other with serial ports of computers, finish whole process carrying out Treatment Analysis in the data importing computing machine by data communication interface.One covering device can load 10～40 pairs of metal galvanic couple samples, renders in 100～3000 meters dark seawater, can lay 1～12 month time under water according to testing requirements.
The present invention is when measuring, two kinds of metal materials are connected with data acquisition unit expansion board circuit respectively with contrast electrode, the data acquisition unit expansion board is connected with data acquisition unit again, between two kinds of metal materials and data acquisition unit expansion board circuit, be connected to operational amplifier and sense resistance, as the zero resistance galvanometer, can adjust the resistance two ends is zero potential drop, is zero thereby make the in-phase input end of operational amplifier and the pressure reduction of reverse input end; Because during the current flowing resistance that the potential difference (PD) between two kinds of metal materials produces, keep its current potential to reduce to zero, operational amplifier can provide an inverse current in the extremely short time; Also be connected to operational amplifier between contrast electrode and data acquisition unit expansion board circuit, be used to the input impedance that provides higher, thereby improve the precision of voltage measurement, the data acquisition unit image data also is stored in the storage space that carries.
The present invention compared with prior art, it is simple and compact for structure; Can carry out the measurement of the bimetallic corrosion data of multiple material simultaneously; Lay with reclaimer operation simply, can combine with various other forms of deep-seas device and test; Easy to operate, the sample frequency of predeterminable instrument start time and different phase; By means of this invention, can study different metal material deep-sea corrosive nature, and the best couple compatibility under the condition of deep-sea between different materials, for the use of different metal material under the condition of deep-sea provides foundation.
Description of drawings:
Fig. 1 is a syndeton principle schematic of the present invention.
Embodiment:
Also in conjunction with the accompanying drawings the present invention is further described below by embodiment.
Embodiment:
The agent structure of present embodiment mainly comprises galvanic couple sample 1, sense resistance installing plate 2, sense resistance 3, data acquisition unit expansion board 4, electric battery 5, contrast electrode 6, operational amplifier installing plate 7, pressure hull 8, data acquisition unit 9, galvanic couple sample installation frame 10, polycore cable pressure-proof connector 11, operational amplifier 12 and data communication interface 13; Galvanic couple sample 1 is connected on operational amplifier and sense resistance installing plate 7 and 2 by cable, contrast electrode 6 is connected on the operational amplifier installing plate 7, two installing plates 7 of operational amplifier and sense resistance and 2 are connected respectively on the different port of data acquisition unit expansion board 4, data acquisition unit expansion board 4 links to each other with data acquisition unit 9 corresponding ports, and data acquisition unit 9 is by electric battery 5 power supplies; Associated components such as operational amplifier 12, sense resistance installing plate 2, operational amplifier installing plate 7, data acquisition unit expansion board 4, data acquisition unit 9 and electric battery 5 are installed in the pressure hull 8, link to each other with contrast electrode 6 electricity with outside galvanic couple sample 1 with polycore cable pressure-proof connector 11 by cable; Present embodiment is thrown in the back and is started working by time and frequency default in the data acquisition unit 9, and changes frequency acquisition automatically after work a period of time, reduces power consumption, save power; Sense resistance 3 and operational amplifier 12 play the effect of zero resistance galvanometer and the input impedance of raising device during collection; Acquired data storage is in the built-in storer of data acquisition unit 9; After device reclaims, adopt the RS-232 mode to link to each other with serial ports of computers, finish whole process carrying out Treatment Analysis in the data importing computing machine by data communication interface 13.
The collection of present embodiment and control system are sealed in the pressure hull 8 of a cylinder type, link to each other with metal galvanic couple sample 1 with outside contrast electrode 6 by the polycore cable pressure-proof connector 11 that is fixed on the pressure hull 8, pressure hull 8 is easy to install and fix, length at 250～400mm, diameter in 100～150mm scope; The present invention measures the galvanic couple current data of 40 pairs of galvanic couple samples simultaneously, and metal galvanic couple sample 1 is fixed in the annular frame, and contrast electrode 6 is arranged in the center of ring, and every pair of metal material uses a contrast electrode separately, or many to the shared contrast electrode of metal material; Be provided with clock in the data acquisition unit 9, as required the preinstall apparatus start time before sample is thrown at the deep-sea; Present embodiment is divided into 1～3 stage according to the needs of test with test, and each stage can be adopted different sample frequency 1 time/second～24 times/hour; The collection of present embodiment and control system are made up of sense resistance 3, operational amplifier 12, data acquisition unit expansion board 4, data acquisition unit 9 and electric battery 5 electric connections.
Claims (2)
1, a kind of metallic material abysmal sea couple electric current multichannel test device, agent structure comprises the galvanic couple sample, the sense resistance installing plate, sense resistance, the data acquisition unit expansion board, electric battery, contrast electrode, the operational amplifier installing plate, pressure hull, data acquisition unit, galvanic couple sample installation frame, the polycore cable pressure-proof connector, operational amplifier and data communication interface, it is characterized in that the galvanic couple sample is connected on operational amplifier and the sense resistance installing plate by cable, contrast electrode is connected on the operational amplifier installing plate, two installing plates of operational amplifier and sense resistance are connected respectively on the different port of data acquisition unit expansion board, the corresponding port with data acquisition unit of data acquisition unit expansion board links to each other, and data acquisition unit is by battery-powered; Operational amplifier, sense resistance installing plate, operational amplifier installing plate, data acquisition unit expansion board, data acquisition unit and electric battery are installed in the pressure hull, link to each other with the contrast electrode electricity with outside galvanic couple sample with the polycore cable pressure-proof connector by cable; Gather with control system and form by sense resistance, operational amplifier, data acquisition unit expansion board, data acquisition unit and electric battery electric connection.
2, metallic material abysmal sea couple electric current multichannel test device according to claim 1, it is characterized in that gathering with control system and be sealed in the pressure hull of a cylinder type, link to each other with metal galvanic couple sample with outside contrast electrode by the polycore cable pressure-proof connector that is fixed on the pressure hull, pressure hull, length is 250～400mm, and diameter is 100～150mm; Metal galvanic couple sample is fixed in the annular frame, and contrast electrode is arranged in the ring center, and every pair of metal material uses a contrast electrode separately, or many to the shared contrast electrode of metal material; Be provided with clock in the data acquisition unit, the preinstall apparatus start time before sample is thrown at the deep-sea, measure the galvanic couple current data of 40 pairs of galvanic couple samples simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102496203A CN101451945B (en) | 2008-12-25 | 2008-12-25 | Metallic material abysmal sea couple electric current multichannel test device |
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| CN2008102496203A CN101451945B (en) | 2008-12-25 | 2008-12-25 | Metallic material abysmal sea couple electric current multichannel test device |
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| CN101451945A true CN101451945A (en) | 2009-06-10 |
| CN101451945B CN101451945B (en) | 2011-04-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445174A (en) * | 2015-11-27 | 2016-03-30 | 中国船舶重工集团公司第七二五研究所 | Efficient string type deep sea environment testing device |
| CN106153528A (en) * | 2016-08-31 | 2016-11-23 | 吴涛 | A kind of metal covering Corrosion monitoring instrument and measuring method thereof |
| CN106198375A (en) * | 2016-07-06 | 2016-12-07 | 中国船舶重工集团公司第七二五研究所 | A kind of deep-sea multichannel corrosion electrochemistry in-situ testing device and method of testing thereof |
| CN106290128A (en) * | 2016-08-05 | 2017-01-04 | 中国船舶重工集团公司第七二五研究所 | A kind of big volume containing the sample multi-functional abyssal environment sample framework, assay device and test method |
| CN107505223A (en) * | 2017-06-20 | 2017-12-22 | 中国船舶重工集团公司第七二五研究所 | A kind of sacrificial anode deep-sea performance in-situ test device and method of testing |
| CN108152671A (en) * | 2017-12-15 | 2018-06-12 | 中国船舶重工集团公司第七0研究所 | For the system and method for multiple metal galvanic couple insulation system fault diagnosis and locations |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2218520A (en) * | 1988-05-13 | 1989-11-15 | Applied Corrosion Monitoring L | Multichannel corrosion rate measurement apparatus |
| DE19503164A1 (en) * | 1994-02-04 | 1995-08-10 | Siemens Comp Inc | Optically coupled data switching system and handset cradle switch |
| US5570263A (en) * | 1994-12-27 | 1996-10-29 | Dataserv Computer Maintenance, Inc. | Communications bus surge protector |
| CN2840227Y (en) * | 2005-11-14 | 2006-11-22 | 上海贝岭股份有限公司 | Multiplexing circuit for multi-channel various signal intermix measurement |
| CN100594370C (en) * | 2007-06-20 | 2010-03-17 | 中国船舶重工集团公司第七二五研究所 | Method and apparatus for testing metal material deep-sea corrosion potential |
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2008
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445174A (en) * | 2015-11-27 | 2016-03-30 | 中国船舶重工集团公司第七二五研究所 | Efficient string type deep sea environment testing device |
| CN106198375A (en) * | 2016-07-06 | 2016-12-07 | 中国船舶重工集团公司第七二五研究所 | A kind of deep-sea multichannel corrosion electrochemistry in-situ testing device and method of testing thereof |
| CN106198375B (en) * | 2016-07-06 | 2019-07-05 | 中国船舶重工集团公司第七二五研究所 | A kind of deep-sea multichannel corrosion electrochemistry in-situ testing device and its test method |
| CN106290128A (en) * | 2016-08-05 | 2017-01-04 | 中国船舶重工集团公司第七二五研究所 | A kind of big volume containing the sample multi-functional abyssal environment sample framework, assay device and test method |
| CN106290128B (en) * | 2016-08-05 | 2019-07-12 | 中国船舶重工集团公司第七二五研究所 | A kind of multi-functional deep-marine-environment sample frame of big volume containing the sample, experimental rig and test method |
| CN106153528A (en) * | 2016-08-31 | 2016-11-23 | 吴涛 | A kind of metal covering Corrosion monitoring instrument and measuring method thereof |
| CN107505223A (en) * | 2017-06-20 | 2017-12-22 | 中国船舶重工集团公司第七二五研究所 | A kind of sacrificial anode deep-sea performance in-situ test device and method of testing |
| CN108152671A (en) * | 2017-12-15 | 2018-06-12 | 中国船舶重工集团公司第七0研究所 | For the system and method for multiple metal galvanic couple insulation system fault diagnosis and locations |
| CN108152671B (en) * | 2017-12-15 | 2020-03-17 | 中国船舶重工集团公司第七0一研究所 | System and method for fault diagnosis and localization of multiple galvanic isolation structures |
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| CN101451945B (en) | 2011-04-20 |
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