CN100594370C - Method and apparatus for testing metal material deep-sea corrosion potential - Google Patents
Method and apparatus for testing metal material deep-sea corrosion potential Download PDFInfo
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- CN100594370C CN100594370C CN200710014976A CN200710014976A CN100594370C CN 100594370 C CN100594370 C CN 100594370C CN 200710014976 A CN200710014976 A CN 200710014976A CN 200710014976 A CN200710014976 A CN 200710014976A CN 100594370 C CN100594370 C CN 100594370C
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Abstract
A potential testing method of deep-sea corrosion on metal material includes preparing test device to be a unified and sealed structure, setting test device in deep-sea of selected sea area, realizingautomatic measurement and automatic conversion as well as automatic storage by utilizing battery carried by itself and control of monolithic computer, using interface to guide data into computer to carry out analysis and treatment to obtain test result after recovery, enabling to carry 30-50 metal test-pieces on one test device and laying test device in deep-sea of 100-3000 metres for 1-6 months.
Description
Technical field:
The invention belongs to metallic material corrosion current potential automatic testing equipment field in the marine environment, relate to a kind of method of testing and device thereof of metal material deep-sea corrosion potential.
Background technology:
Just begun the deep-marine-environment investigation corrosion of material according to the bibliographical information U.S. (testing station, Hueneme port, tongue of ocean testing station), USSR (Union of Soviet Socialist Republics), Japan (testing site, Kitakyushu, Bie Fu testing site), Holland (Hull moral testing station) etc. in the sixties in last century, country such as Norway, India is also in the research work of having carried out this respect in recent years.The U.S. has carried out large-scale deep-marine-environment material property testing from 1961 in the period of 1970; but its content of the test only is the deep-sea exposure tests of various materials; detecting content is weightlessness, stress sensitivity, erosion profile observation and mechanical property loss of energy etc., and the report of deep-marine-environment corrosion potential in site measurement is not arranged as yet.40 days the exposure test by a definite date that the USSR (Union of Soviet Socialist Republics) deep-sea test of reporting in the document is only carried out in northwest Pacific.That has carried out that the metal deep-sea corrosion potential measures has only Norway and India two countries, and the method for the two is different with emphasis.India obtains seawater from dark 500 and 1200 meters when carrying out the deep-sea exposure test of 5000m in the Indian Ocean and delivers to the laboratory, as medium steel is done polarization scan.Obviously, resulting test result can not be credible fully, but conduct is feasible relatively.Englishman W.B.MACKAY has done sacrificial protection real sea test in marine site, northwest, Scotland, the degree of depth is 150 meters, and method is to adopt buoyage, and the negative electrode in the pilot system, positive wire are guided on the buoy on the sea, regularly measures.Obviously, this method is not suitable for away from continent, darker pelagic realm.Nineteen eighty-two～1999 year Norway ocean technical institute has carried out the research of material deep-sea cathode protecting parameter in a plurality of places in the northern Norwegian Sea.The test degree of depth is from 100 meters～1335 meters.This is real sea test truly.Single-point anchor architecture is adopted in test, utilizes the directed rudder plate of hyperchannel current meter, and fixedly sacrificial anode, contrast electrode and negative electrode are regularly gathered protection potential, protective current and relevant environmental factor.Obtained the protective current density of the steel of Norway's off-lying sea different depth by a series of tests.This method once can only be measured single performance of planting the galvanic couple sample, is not suitable for the corrosion potential test of multiple material.
China is before and after the nineteen ninety, and the galvanic series of material in 4 marine sites made in once carried out kind of metal material surplus in the of 70 in Sanya, Xiamen, Zhoushan and Qingdao natural sea-water 180 days corrosion potential test.Its method of testing is artificial periodic measurement, and sample rate is slow, inefficiency.In recent years, units concerned have developed the bimetallic corrosion automatic data acquisition system, measure automatically in can shallow by the sea table seawater material corrosion potential and and the galvanic couple electric current, and pass to the laboratory by network and handle.Domesticly do not carry out deep-marine-environment corrosion test and research thereof at present as yet; and society has urgent day by day demand to material deep-sea corrosion data; add the progress at full speed of modern electronic technology and computer technology, deep-marine-environment corrosion potential in-situ testing technique will provide strong technical support for metal material deep-sea corrosion mechanism research, deep-sea cathodic protection research etc.
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 in 3000 meters deep-seas of depth of water ocean environment midium or long term, gather the proving installation of metal erosion current potential in real time, can measure the nearly corrosion potential data of 50 samples simultaneously.The variation of the metal erosion current potential by different depth in conjunction with the measurement data of briny environment factor, forms simulated deep-sea environment metal erosion potential test instrument and its implementation effectively reliably.
To achieve these goals, the present invention is achieved through the following technical solutions: will install assembling earlier and be prepared into the integral type hermetically-sealed construction, together place selected marine site separately or with other deep-sea testing equipments, utilize self-contained battery, adopt Single-chip Controlling, realize measurement automatically, conversion automatically, storage automatically; After the recovery, by interface the data importing computing machine is carried out Treatment Analysis, tabular form provides series ground test result side by side; One covering device can load 30～50 test buttons, render to 100～3000 meters dark marine, can lay time of 1～6 month under water according to testing requirements.
It is the center that the installation of test specimens of the present invention and contrast electrode is adopted with the contrast electrode, the form that sample distributes around it ringwise, and the diameter of sample ring is 500～600mm, draws lead from each sample and converges into a cable; Sample is fixed on the framework of being made by nylon or teflon.
When the present invention carries out the deep-sea input, respectively specimen mounting and testing apparatus are fixed on the test unit of deep-sea, or test respectively at different depth on the special buoyancy system.Before the input, to be inserted in from the cable plug that sample is drawn on the housing socket of testing apparatus, tester will sink under water with the deep-sea device, when reaching 100 meters of the depth of waters, pressure switch is opened equipment and is started working under the effect of hydraulic pressure, the current potential of test metal material in the deep-sea over time.After a test period finishes, reclaim the deep-sea test unit, simultaneously potential test equipment is together reclaimed, with the data acquisition in the equipment of being stored in computing machine, finish test, observe the specimen surface state simultaneously, be analyzed and provide the result with weightless coupon results.
Proving installation agent structure of the present invention comprises data-carrier store, General controller, potential measurement table, path converter, contrast electrode, sample to be tested, power supply, pressure hull and withstand voltage multicore cable, after conventional technology processing and preparing process split preparation, electrical connectivity is assembled into the monomer-type measuring system and places pressure hull, throws in marine test through the normal back of verification test.
After the measuring system partial circuit of current potential instrument of the present invention and the assembling of other circuit unit electric connection, reach requirement, be fixed to pressure hull and all seal with resin through detecting every function.
Pressure hull of the present invention selects for use anti-corrosion material to be processed into, and its size becomes cylinder type according to the size design of measuring system, and its length is 400-700mm, and diameter is 150-250mm, the slot of indoor design fixation measuring system; Case lid adopts the close silk of rubber " O " type circle spiral to connect, fixedly 1-2 the withstand voltage cable socket of holing on the pressure hull.
Technical characterictic of the present invention comprises:
1. equipment adopts compact design, and test is sealed in the pressure hull of a cylinder type with control system, and in 150～250mm scope, cylinder type is easy to fix the length of pneumatic shell at 400～700mm, diameter.
2. system of subject is made up of General controller, data-carrier store, potential measurement table, path converter, power supply, contrast electrode, is electrical connected logical by being fixed on withstand voltage attachment plug of multicore on the pressure hull and external probes and sample.
3. sample to be tested is fixed in the annular frame, and contrast electrode is arranged in the center of ring.
4. equipment cloth is put in the degree of depth seawater, and pressure switch is connected, and control system is started working, and dictate converter and potential measurement are measured the potential value of sample with pre-set time interval, and by controller measured value is stored in the storer.
The present invention is as a kind of deep-sea corrosion test technical equipment of practicality, and it is simple and compact for structure; The sample size of measuring is bigger, can carry out the corrosion measurement of more material, saves testing expenses; Lay with reclaimer operation simplyr, can combine with the deep-sea device of any other form and test; By means of this invention, can study the Corrosion of Metallic Materials performance, and provide master data to guarantee for carrying out the corrosion research of lab simulation deep-marine-environment from now on.
Description of drawings:
Fig. 1 is apparatus of the present invention package assembly principle schematic.
Fig. 2 is apparatus of the present invention circuit communication structural principle synoptic diagram.
Embodiment:
Apparatus agent structure of the invention process is assembled for realizing the monomer-type sealing system of test automatically by data-carrier store 1, General controller 2, potential measurement table 3, converter 4, contrast electrode 5, sample to be tested 6, battery 7, pressure hull 8 and withstand voltage multicore cable 9 electrical communication formulas.
Apparatus of the present invention is the split manufacturing, in laboratory sealing assembling, throws in test through carrying out the reality sea after the test before the test.
The potential measurement table of the invention process instrument adopts custom circuit to finish, and reaches requirement through detecting every function, is fixed in the pressure hull 8.Because metering circuit is low in energy consumption, heating is few, and the temperature of deep-marine-environment, can all seal circuit with resin for guaranteeing still to guarantee operate as normal under the situation of the unexpected water inlet of housing near zero degree.
The size of pressure hull 8 of the invention process becomes cylinder type according to the size design of measuring system, the slot of indoor design fixation measuring system; Pressure hull 8 adopts close silk spiral to connect the sealing of rubber " O " type circle.Withstand voltage cable socket is fixed in boring on the housing, considers the watertight reliability of housing, according to the quantity of sample quantities and cable core, fixes 2 sockets in the enforcement.
It is the center that the installation of sample to be tested 6 and contrast electrode 5 is adopted with contrast electrode 5, the form that sample to be tested 6 distributes around it ringwise, and the diameter of sample ring is 500～600mm, draws lead from each sample and converges into a cable; Sample is fixed on one by on the nonmetal framework of making, nonmetal nylon or the teflon selected for use in the enforcement.
When the deep-sea input is carried out in enforcement of the present invention, respectively specimen mounting and testing apparatus are fixed on the test unit of deep-sea, or test respectively at different depth on the special buoyancy system.Before the input, to be inserted in from the cable plug that sample is drawn on the housing socket of testing apparatus, tester will sink under water with the deep-sea device, when reaching 100 meters of the depth of waters, pressure switch is opened equipment and is started working under the effect of hydraulic pressure, test the current potential of various materials in the deep-sea over time.After a test period finishes, reclaim the deep-sea test unit, simultaneously potential test equipment is together reclaimed, the data acquisition in the equipment of being stored in computing machine, is finished test, observe the specimen surface state simultaneously, be analyzed with weightless coupon results.
During the invention process, the circuit communication of its device and components and parts are selected, and contrast accompanying drawing 2 carries out, and all select components and parts to be the commercially available prod, are communicated with and assemble according to the electrical principles of routine to be testing system device.
Claims (2)
1. the method for testing of a metal material deep-sea corrosion potential, it is characterized in that earlier proving installation assembling in deep-sea being prepared into the integral type hermetically-sealed construction, together place selected marine site separately or with other deep-sea proving installations, utilize self-contained battery, adopt Single-chip Controlling, realize measurement automatically, conversion automatically, storage automatically; After the recovery, by interface the data importing computing machine is carried out Treatment Analysis, tabular form provides series ground test result side by side; The installation of sample to be tested and contrast electrode is the center with the contrast electrode, and sample to be tested distributes around it ringwise, and the sample to be tested ring diameter is 500～600mm, draws lead from each sample to be tested and converges into a cable; Sample to be tested is fixed on the specimen mounting of being made by nylon or teflon; One cover deep-sea proving installation loads 30-50 spare sample to be tested and renders in the 100-3000 rice deep-sea; When carrying out the deep-sea input, respectively specimen mounting and testing apparatus are fixed on the proving installation of deep-sea, or test respectively at different depth on the special buoyancy system; Before the input, to be inserted on the housing socket of testing apparatus from the cable plug that sample to be tested is drawn, testing apparatus will sink under water with the deep-sea proving installation, when reaching 100 meters of the depth of waters, pressure switch is opened testing apparatus and is started working under the effect of hydraulic pressure, the current potential of test sample to be tested in the deep-sea over time; Laid under water 1-6 month; A test period is reclaimed the deep-sea proving installation after finishing, and simultaneously testing apparatus is together reclaimed, to be stored in data acquisition in the testing apparatus in computing machine, finish test, observe the sample to be tested surface state simultaneously, be analyzed and provide the result with weightless sample to be tested result.
2. the proving installation of a metal material deep-sea corrosion potential, it is characterized in that agent structure comprises data-carrier store, General controller, potential measurement table, path converter, contrast electrode, sample to be tested, power supply, pressure hull and withstand voltage multicore cable, after processing and preparing process split preparation, electrical connectivity is assembled into the monomer-type measuring system and places pressure hull, after measuring system partial circuit and the assembling of other circuit unit electric connection, be fixed to pressure hull after tested also with resin-sealed; The pressure hull size becomes cylinder type according to the size design of measuring system, and its length is 400-700mm, and diameter is 150-250mm, the slot of indoor design fixation measuring system; Case lid adopts the close silk of rubber " O " type circle spiral to connect, fixedly 1-2 the withstand voltage cable socket of holing on the pressure hull.
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| CN200710014976A CN100594370C (en) | 2007-06-20 | 2007-06-20 | Method and apparatus for testing metal material deep-sea corrosion potential |
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| CN200710014976A CN100594370C (en) | 2007-06-20 | 2007-06-20 | Method and apparatus for testing metal material deep-sea corrosion potential |
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| CN100594370C true CN100594370C (en) | 2010-03-17 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101451945B (en) * | 2008-12-25 | 2011-04-20 | 中国船舶重工集团公司第七二五研究所 | Metallic material abysmal sea couple electric current multichannel test device |
| CN102388302B (en) * | 2009-04-09 | 2013-11-20 | 新日铁住金株式会社 | Method for evaluation test of corrosion resistance of inner surface of upper deck cargo tank in actual ship |
| CN101769853B (en) * | 2010-01-08 | 2012-07-04 | 康科联（北京）新技术有限公司 | Experiment device for testing corrosion performance of material in simulated deep-sea environment |
| CN103149145B (en) * | 2013-03-08 | 2014-09-24 | 中国船舶重工集团公司第七二五研究所 | Deep sea mud environment corrosion testing apparatus |
| 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 |
| CN106772124A (en) * | 2017-01-09 | 2017-05-31 | 许昌学院 | Supply unit test system |
| 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 |
| CN111118502B (en) * | 2020-01-16 | 2023-03-21 | 西安热工研究院有限公司 | Small-caliber heat exchange tube cathode protection potential measuring device and using method |
| CN111337730B (en) * | 2020-03-06 | 2022-04-19 | 中海油信息科技有限公司 | Underwater structure potential detection device with impact probe |
| CN114112884A (en) * | 2021-12-07 | 2022-03-01 | 江苏容大材料腐蚀检验有限公司 | Detection method for steel corrosion performance under simulated seawater environment |
| CN114408140B (en) * | 2021-12-24 | 2023-06-20 | 宜昌测试技术研究所 | Fin rudder device suitable for underwater vehicle |
| CN114614293B (en) * | 2022-03-07 | 2024-02-02 | 中国船舶重工集团公司第七二五研究所 | Modular electrode for in-situ detection of deep sea corrosion and watertight plugging system |
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