CN106644906A - Test device for simulating seawater tide-difference zone corrosion and test method - Google Patents
Test device for simulating seawater tide-difference zone corrosion and test method Download PDFInfo
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- CN106644906A CN106644906A CN201510727773.4A CN201510727773A CN106644906A CN 106644906 A CN106644906 A CN 106644906A CN 201510727773 A CN201510727773 A CN 201510727773A CN 106644906 A CN106644906 A CN 106644906A
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Abstract
The invention discloses a test device for simulating seawater tide-difference zone corrosion and a test method. A sample frame component is arranged in a sample cylinder, a through hole is formed in the center of the bottom of the sample cylinder, a seawater tide-difference zone corrosion simulator is mounted in the sample cylinder from the through hole and drives liquid level of test solution to rise and fall and the test solution to scour surfaces of samples of the sample frame component, the test solution is conveyed into the sample cylinder by a test solution conveying system, and set constant temperature of the test solution is kept by the test solution conveying system. The test device can perfectly simulate various complex corrosion conditions experienced by steel components in a tide-difference zone, the conditions include time of different corrosion stages, submersion time, time of sample exposing water surface and drying time, and corresponding modification can be achieved according to sea area conditions of actual service places of the steel components. The test device can automatically simulate and acquire corrosion resistance of materials in the seawater tide-difference zone in a short time. The test device is applicable to simulating research field of corrosion conditions caused by height difference of tidal water when seat water rises and falls.
Description
Technical field
The present invention relates to the experimental rig and analogy method of a kind of simulated environment, more particularly to one kind being capable of simulated seawater
The experimental rig of the sample corrosion condition that tidewater difference in height when falling causes and the method for simulation corrosion.
Background technology
At present, in the Chemical Engineering Laboratory of each iron and steel metallurgy enterprise, it is often necessary to which the iron and steel of semi-finished product, finished product is tried
Sample carries out various tests, for obtaining the property indices of sample, such as tensile strength, plasticity, clod wash intensity
Data, in addition to these mechanical index, in addition it is also necessary to various environmental simulation tests are carried out to steel sample, to sample
Acidproof, high temperature resistant, decay resistance make judge, because steel corrosion is the dominant failure mode of ferrous materials, institute
It is one of important indicator of steel sample with decay resistance, has directly influenced durability, the security of finished product, and
Due to the field that ferrous materials are applied it is extremely many, therefore need to various environment be simulated test, such as sunshine, high wind,
The environmental simulations such as solvent submergence, seawater corrosion are tested, and the purpose of wherein briny environment simulation corrosion test is：
In the exploitation of marine resources, steel are put down in ocean driven energy plant, Oversea bridge, seabed conveyance conduit, ocean
The large ocean such as platform component and naval vessel etc. are used widely in field.This kind of component under arms during due to seawater
And the presence of air middle and high concentration chlorion faces even more serious etching problem, therefore need to carry out various ferrous materials
Briny environment simulates corrosion to obtain corresponding corrosion-resistant parameter.
Accurate evaluation material corrosive nature in the seawater is conducive to the research of associated erosion mechanism, and promotes sea water resistance rotten
The exploitation of erosion steel and the selection of Steel for Seawater, simultaneously for the maintenance for instructing ocean steel construction, extend ocean steel construction
Service life, reduces use cost tool and is of great significance.
And corrosion of the iron and steel under marine environment can be divided into from top to bottom sea atmosphere corrosion, Seawater splash zone burn into
Corrode and totally 5 regions such as ooze corrosion in Tidal zone burn into water immersion area.Wherein seawater Tidal zone refers to that seawater is average
Highest water level is to the region between the average lowest water level of seawater.In this region, steel component is complete in high tide level
Flooded by seawater, component bears and carry in the erosion corrosion of ocean current, particularly seawater a large amount of organic matters and microorganism or few
Erosion corrosion during amount silt substantially increases, and as during the reduction of tidal level, especially less than middle tidal level, component is in short-term
It is interior to surface, the splashing corrosion of seawater is born, as tidal level is when persistently decreasing up to lowest water level, component is complete
The total detachment water surface, drying is become in sunlight according to lower surface is shone from humidity, bears alternation of wetting and drying corrosion.And component surface
With fully aerated contact with sea water in Tidal zone, oxygen supply is abundant, etching condition variation, so Tidal zone is sea
The foreign corrosion of component more serious and complex region of Corrosion Types.
Seawater corrosion test under prior art mainly says that steel sample material object is hung on test pile by region by the sea
It is weightless and the thinning situation evaluation material of material by the weightless unit of account area of lacing film in different time sections to carry out
Decay resistance.The usual cycle length of this test method, high cost, and boisterous interference is easily subject to, it is unfavorable
Instruct in the exploitation of Seawate-corrosive-resisting steel and the selection of associated components.
It is also very scarce in the experimental rig of laboratory simulation tidal range corrosion at present due to the etching condition complexity of seawater Tidal zone
It is weary.
Patent " seawater splash corrosion test device for weathering resistant steel " disclosed in 2007 is (ZL200620034876.9) by spray
Mouth periodically sprays the corrosion that simulated seawater carrys out simulated seawater splash zone to sample, due to being limited by jet size, there is examination
The dry and wet condition problem of non-uniform on sample surface, and at regular time and quantity the water jets impact of nozzle is difficult to wave simulated component is rushed
Brush is acted on, and is not enough to the corrosion condition of actual response seawater Tidal zone component；
Patent disclosed in 2008 " a kind of adjustable speed test device that can be used for seawater immersion corrosion "
(CN201141826Y) and patent disclosed in 2015 " drying and watering cycle in a kind of briny environment replaces simulation accelerated coating
Corrosion experimental device " is (CN204128939U), " seawater corrosion analogue means " (CN104330351A) employing simulation is extra large
Water evaluates the seawater corrosion performance of material in laboratory.Wherein the former adopts the alternation of wetting and drying of runner simulated seawater, but speed
Degree is relatively slow, the alternation of wetting and drying of static state can be considered as substantially, it is impossible to meet the erosion corrosion performance test of seawater；And the latter
Corrosive nature is evaluated by the sample immersion in different water depth position, is equal to submergence corrosion, with Tidal zone the tide is flowing and ebbing
Actual corrosive environment differ greatly.
Patent disclosed in 2012 " a kind of salt water cooling system metallic material corrosion simulation test device "
(CN2026614653U) it is mainly used in studying the corrosion condition in flowing seawater, substantially belongs to the corrosion in water immersion area
Simulation.Additionally, patent disclosed in 2009 " a kind of intermittent immersion corrosion test method of natural sea water simulation accelerated material corrosion "
The method corroded by the alternation of wetting and drying of immersion-exposed process simulation seawater is described, experimental rig is not related to, and
The etching condition of simulation does not include the souring of Tidal zone ocean current and wave.
Patent EP2221601 (A1) (the Pitting corrosion diagnostic method and of 2010
apparatus for stainless steel and for seawater pump using stainless steel as
A structural member) inspection method and device of stainless steel spot corrosion under a kind of briny environment are described, it is not related to
The corrosion of Seawater splash zone；Patent KR101440554 (B1) (seawater corrosion fatigue disclosed in 2014
Test system) test system of seawater corrosion fatigue is described, equally it is not related to the corrosion of seawater Tidal zone.
In sum, from existing document, patent it is found that the sea water simulation corrosion of prior art has analog loop
Border is single, data acquisition is inaccurate, completely analog simulation cannot be carried out to whole seawater Tidal zone, therefore existing urgent a kind of
The experimental rig and test method of new simulated seawater Tidal zone corrosion, can effective simulated seawater Tidal zone complicated corruption
Erosion condition, including the alternation of wetting and drying corrosion and the erosion corrosion of seawater of sample, and result of the test is stable, reliable.Favorably
In researching and analysing for Tidal zone material corrosion failure mechanism, and the development for new steel grade provides guidance, is ocean engineering
Foundation is provided with steel selection.
The content of the invention
Sea water simulation corrosion under in order to solve prior art has that simulated environment is single, data acquisition inaccurate, cannot be right
Whole seawater Tidal zone carries out the shortcoming of completely analog simulation, the invention provides one kind can simulated seawater Tidal zone
Souring of the wave to component, while simulate component in ocean filling in the test of the alternation of wetting and drying corrosion condition of Tidal zone
The method for putting and simulating corrosion.The experimental rig component can entirely rise in laboratory's real-playback seawater Tidal zone
Dynamic Corrosion situation and During Flooding And Draining Alternating Process during tide, ebb tide, result of the test is stable, reliable.So as to promote tide
Difference area's material corrosion failure mechanism research and analyse and new steel grade development, while the use steel selection for ocean engineering is provided
Foundation.A kind of experimental rig and the concrete structure and step of test method of simulated seawater Tidal zone corrosion of the present invention
It is as described below：
A kind of experimental rig of simulated seawater Tidal zone corrosion, including the examination of the oblate column being arranged on sample tube stent
Sample cylinder, it is characterised in that：
Described test specimen tube is internally provided with the specimen mounting component of an annular at it, and the specimen mounting component is in against test specimen tube
Internal barrel is arranged and fixed, and cover plate is provided with the top of test specimen tube；
Described test specimen tube offers through hole in the center of its bottom, by the corrosion simulated device in a seawater Tidal zone from
The through hole loads, and the corrosion simulated device in seawater Tidal zone drives the liquid surface lifting of testing liquid and washes away specimen mounting component (A)
Each sample surface；
Described test specimen tube is connected with a testing liquid induction system pipeline, and the testing liquid induction system is defeated to test specimen tube
Enter testing liquid and keep the constant temperature for setting.
A kind of experimental rig of simulated seawater Tidal zone corrosion of the invention, it is characterised in that described specimen mounting
Component includes ring specimen frame, specimen mounting fixture and sample, wherein, ring specimen frame is in the cylinder inside test specimen tube
Wall arranged and fixed by specimen mounting fixture, and each sample then perpendicular shape is uniformly clamped in ring specimen frame.
A kind of experimental rig of simulated seawater Tidal zone corrosion of the invention, described seawater Tidal zone is corrosion simulated
Device includes power transmission shaft, variable-frequency motor, transmission protective shaft jacket, simulated seawater tidal range blade and drying lamp, wherein,
Power transmission shaft is inserted perpendicularly into the inside of test specimen tube, under power transmission shaft by the through hole that the center of test specimen tube bottom opens up
End is connected with variable-frequency motor and is rotated by the variable-frequency motor control, covers on the axle body of the inside of power transmission shaft insertion test specimen tube
Transmission protective shaft jacket is connected to, the lower end of the transmission protective shaft jacket seals the through hole that the center of test specimen tube bottom opens up,
And the highest liquid level that the length of protective shaft jacket is higher than testing liquid is driven, simulated seawater tidal range blade has 3 or 4,
In being arranged on the set of transmission protective shaft jacket for 120 ° or 90 ° of interval circumference uniform distribution formula, and in transmission protective shaft jacket
Top be then provided with 3～4 the drying lamp that is spacedly distributed.
The purpose of design of transmission protective shaft jacket is to prevent testing liquid to be splashed into power transmission shaft, while enclosing test specimen tube bottom
The through hole that the center in portion opens up, prevents testing liquid from flowing out from through hole, when variable-frequency motor drives drive axis,
Power transmission shaft drives again the transmission protective shaft jacket of socket to rotate together, and now circumferentially the power transmission shaft that is arranged on of even distribution type is protected
Simulated seawater tidal range blade with the set of set is also rotated in the lump, and blade drives testing liquid to produce wavy solution
Impact so that the lifting repeatedly of the ripple ripple of liquid level one of testing liquid, washes away the surface of each sample of specimen mounting component,
The wave cut of seawater Tidal zone corrosion is simulated, drying lamp then simulates shining for sunlight and shines.
The experimental rig of a kind of simulated seawater Tidal zone corrosion of the invention, it is characterised in that described test is molten
Liquid induction system includes testing liquid delivery pump, testing liquid pond and the control system with thermostat, wherein, test
Solution transfer pump is connected respectively with the inside of test specimen tube and the internal duct in testing liquid pond, defeated by the testing liquid
Send pump that the testing liquid in testing liquid pond is sent into the inside of test specimen tube, and the control system with thermostat is then arranged on
The outside in testing liquid pond, constant temperature control is carried out by default steady temperature parameter to the testing liquid in testing liquid pond
System.
Herein purpose of design is that the control system with thermostat sets up in advance test procedure simultaneously by its control panel
Temperature, the testing liquid flow velocity of setting testing liquid, rotating speed of transmission shaft, drying lamp opening time, overall cycle-index
Deng every test parameters, test is set to carry out according to predetermined scheme, testing liquid delivery pump is by the test in testing liquid pond
Solution sends into the inside of test specimen tube, and the corrosion simulated device running in above-mentioned seawater Tidal zone carries out corrosion simulated test.
It should be noted that because testing liquid is artificial simulated seawater, being mainly added with the salts such as sodium chloride, magnesium chloride, people
The concrete composition of work simulated seawater can be finely tuned according to the seawater component of different waters, therefore all and testing liquid directly contact
Part as samples cylinder, transmission protective shaft jacket, simulated seawater tidal range blade and testing liquid pond etc. adopt polytetrafluoro
Ethene material makes, so that durability rises while obtaining good Corrosion Protection.
A kind of test method of simulated seawater Tidal zone corrosion, based on the examination that a kind of above-mentioned simulated seawater Tidal zone is corroded
Experiment device, it comprises the following steps that described：
1) test the preparatory stage, by each sample to be measured it is cleaned, drys, weigh after uniform vertically clamping be arranged on
In the ring specimen frame that barrel inside test specimen tube is fixedly installed, the cover plate that the top of test specimen tube is arranged is covered, so
Prepare the testing liquid of set component in testing liquid pond afterwards, and by the control system Control experiment with thermostat
The temperature of solution；
2) test adjustment and parameter setting stage, firing test solution transfer pump notes the testing liquid in testing liquid pond
Enter the inside of the test specimen tube for setting the other specifications such as temperature in cylinder, humidity, until the liquid level of testing liquid can flood completely
Do not have the predetermined fluid level of sample, close testing liquid delivery pump, then restart variable-frequency motor and regulate the speed, with this speed
For the speed of service of simulated seawater tidal range blade, the testing liquid of testing liquid delivery pump is then set from test specimen tube
The speed in testing liquid pond is flowed back in inside, the state for carrying out the tidewater fluctuation of simulated seawater Tidal zone with this and time, while
The baking time that setting drying lamp is opened, the situation and sample corrosion condition finally according to simulated marine site sets this step
2) global cycle number of times；
3) start experimental stage, start test by the start button of the control system of lower band thermostat, according to step 2)
The global cycle number of times of middle setting repeating to flood-moist-be dried-moist-mistake of the tidewater fluctuation of seawater Tidal zone flooded
Journey, after global cycle number of times is reached, off-test, whole experimental rig is automatically stopped work；
4) off-test and sample pretreating stage, whole experimental rig opens cover plate after stopping, taking out sample, sample Jing
With running water and alcohol washes and dry up respectively again after pickling.Sample is weighed after standing 24 hours in drying basin, according to
Weight loss unit of account area before and after test is weightless, and measurement surface corrosion condition, such as maximum corrosion depth parameter,
Decay resistance of the material in specified sea areas Tidal zone is evaluated with this；
5) validation test is finished, the testing liquid in depletion test solution pool and test specimen tube, and cleaning equipment, keeps examination
Test solution pool and test specimen tube cleaning inside, drying.
A kind of experimental rig and test method of simulated seawater Tidal zone corrosion of the present invention, its cardinal principle is：
When carrying out tidal range corrosion test, the sample of sheet is uniformly arranged on ring specimen frame and fixed, and ring specimen
Frame is then fixed by the specimen mounting fixture on test specimen tube inwall, testing liquid delivery pump by the testing liquid of pre-set constant temperature from
In testing liquid pond injection test specimen tube, subsequent start-up variable-frequency motor drives power transmission shaft and the power transmission shaft on socket power transmission shaft to protect
Sheath is rotated together, and is driven the simulated seawater tidal range blade arranged on protective shaft jacket and is also rotated in the lump therewith, in mould
It is in wavy lifting to intend testing liquid liquid level under the rotation driving of seawater tidal range blade, and specimen surface is washed away repeatedly.
And the highest water level of the seawater Tidal zone in reality is to during lowest water level, the component of Tidal zone successively experienced
Sea water immersion, seawater splash, surface moisture, the process of drying, from ebb tide to flood tide experience, order is then contrary.This
Bright then realistic simulation this situation, on the one hand sample bears corrosion in During Flooding And Draining Alternating Process, while also by seawater
Wash away with sunlight (drying lamp) according to shining and sea wind is brushed sample, device of these corrosive conditions in the present invention
In can simulate one by one, its is specific as follows：
1. tidal range corrosion condition of the sample in process of the test is by amount of solution initial in test specimen tube, the velocity of rotation of blade
And the transporting velocity of testing liquid is determined.Initial soln amount (the one of such as liquid level to specimen height in setting test specimen tube
Half) after, the rotation of Motor drive blade is started, the wavy liquid level in test specimen tube under the driving effect of blade gradually rises,
Control blade rotating speed can determine liquid level, it is ensured that sample is flooded completely by testing liquid, component during simulation high tide level
Situation about being immersed in below water level, the testing liquid flowed with certain speed simulated ocean undercurrent and component rushed simultaneously
Brush is acted on.If it is necessary, organic matter, the silt in appropriate molecule simulated seawater can also be added in the solution
Deng；
2. when the testing liquid of testing liquid delivery pump flows back to testing liquid pond from the inside of test specimen tube, the liquid in test specimen tube
Face is gradually lowered, until being wholly absent, steel construction piece gradually surfaces and gradually dry process when simulating ebb tide；
3. testing liquid delivery pump into test specimen tube progressively injection testing solution when, as liquid level gradually rises in cylinder,
Solution starts to be splashed to specimen surface until flooding sample completely, simulate at the incoming tide steel construction piece from dry tack free to by
The process that gradually humidity is flooded up to wave by wave；
4. drying lamp when in test specimen tube without testing liquid on power transmission shaft is opened, and is simulated shining for sunlight and is shone, while turning
Dynamic blade drives air to simulate brush effect of the sea wind to steel construction piece through specimen surface.
A kind of experimental rig and test method of simulated seawater Tidal zone corrosion of the present invention, can perfectly simulate steel
The various complex corrosion situations that component experiences in Tidal zone, the time in such as different corrosion stages, flooding time, sample dew
Go out water surface time and drying time, can also be revised accordingly according to the sea conditions in the actual military service place of component.
Following beneficial effect is obtained using the experimental rig and test method of a kind of simulated seawater Tidal zone corrosion of the present invention
Really：
1. a kind of simulated seawater Tidal zone of the present invention is corroded experimental rig and test method, simple structure, it is easy to grasp
Make, fully simulate component during the flood tide of seawater Tidal zone, ebb tide sea water immersion, wash away with sunlight according to shine,
Sea wind such as brushes at the corrosion process of multi-form, and test parameters can be adjusted according to the hydrologic regime of different waters, can
Corrosive environment under the different sea situations of simulation (highest water level, wave are high), strong adaptability.And after equipment starts, equipment root
According to default parameter automatic running, it is not necessary to artificial guard, material can be in the short period of time obtained in seawater tidal range
The decay resistance in area；
2. the present invention compared with prior art, solves that existing experimental rig simulated environment is single, cannot truly simulate tide
The various complex corrosion environmental problems in difference area.And specimen mounting can simultaneously dispose multigroup sample, can carry out simultaneously multiple
The tidal range Evaluation of Corrosion Resistance of steel grade.Failure Mechanism, steel grades and marine steel for the corrosion of seawater Tidal zone
Structure with steel selection has important effect.
Description of the drawings
Fig. 1 is a kind of tool of the device part of the experimental rig and test method of simulated seawater Tidal zone corrosion of the present invention
Body structural representation；
Fig. 2 is the concrete of the test specimen tube of a kind of experimental rig of simulated seawater Tidal zone corrosion of the present invention and test method
Structure top view.
In figure：1- sample tube stents, 2- test specimen tubes, 3- cover plates, A- specimen mounting components, A1- ring specimen framves, A2-
Specimen mounting fixture, A3- samples, the corrosion simulated device in B- seawater Tidal zone, B1- power transmission shafts, B2- variable-frequency motors, B3-
Transmission protective shaft jacket, B4- simulated seawater tidal range blades, B5- drying lamps, C- testing liquid induction systems, C1- tests
Solution transfer pump, C2- testing liquids pond, control systems of the C3- with thermostat.
Specific embodiment
A kind of simulated seawater Tidal zone of the present invention is corroded experimental rig with reference to the accompanying drawings and examples and test side
Method is further described.
Embodiment
As shown in Figure 1 to Figure 2, a kind of experimental rig of simulated seawater Tidal zone corrosion, props up including test specimen tube is arranged on
The test specimen tube 2 of the oblate column on frame 1, test specimen tube is internally provided with the specimen mounting component A of an annular, the sample at it
Frame component is arranged and fixed in the barrel inside test specimen tube, and cover plate 3 is provided with the top of test specimen tube；
Test specimen tube 2 offers through hole in the center of its bottom, by the corrosion simulated device B in a seawater Tidal zone from this
Through hole loads, and the corrosion simulated device in seawater Tidal zone drives the liquid level of testing liquid to rise and wash away specimen mounting component A's
The surface of each sample；
Test specimen tube 2 is connected with a testing liquid induction system C pipeline, and the testing liquid induction system is input into test specimen tube
Testing liquid simultaneously keeps the constant temperature for setting.
Specimen mounting component A includes ring specimen frame A1, specimen mounting fixture A2 and Sample A 3, wherein, ring specimen frame
Arrange and fixed by specimen mounting fixture in the barrel inside the test specimen tube, and each sample then perpendicular shape is equal
Cloth holder is in ring specimen frame.
The corrosion simulated device B in seawater Tidal zone includes power transmission shaft B1, variable-frequency motor B2, transmission protective shaft jacket B3, mould
Intend seawater tidal range blade B4 and drying lamp B5, wherein, power transmission shaft is opened up by the center of the bottom of test specimen tube 2
Through hole be inserted perpendicularly into the inside of test specimen tube, the lower end of power transmission shaft is connected and by variable-frequency motor control with variable-frequency motor
And rotate, transmission protective shaft jacket is socketed with the axle body of the inside of power transmission shaft insertion test specimen tube, the transmission protective shaft jacket
Lower end seals the through hole that the center of test specimen tube bottom opens up, and it is higher than testing liquid to be driven the length of protective shaft jacket
Highest liquid level, simulated seawater tidal range blade has 3 or 4, in 120 ° or 90 ° of interval circumference uniform distribution formula
Be arranged on the set of transmission protective shaft jacket (is 3 simulated seawater tidal range blades in the present embodiment, in interval 120
° circumference uniform distribution formula is arranged on the set of transmission protective shaft jacket), and be then provided with the top of transmission protective shaft jacket
Be spacedly distributed drying lamp at 3～4.
Transmission protective shaft jacket can prevent testing liquid to be splashed into power transmission shaft, while the center for enclosing test specimen tube bottom is opened
If through hole, prevent testing liquid from flowing out from through hole, when variable-frequency motor drives drive axis, power transmission shaft drives again set
The transmission protective shaft jacket for connecing is rotated together, now circumferentially even distribution type be arranged on transmission protective shaft jacket set with mould
Intend seawater tidal range blade also to rotate in the lump, blade drives testing liquid to produce wavy fluid challenge so that test
The lifting repeatedly of the ripple ripple of liquid level one of solution, washes away the surface of each sample of specimen mounting component, that is, simulate seawater tide
The wave cut of difference area corrosion, drying lamp then simulates shining for sunlight and shines.
Testing liquid induction system C includes testing liquid delivery pump C1, testing liquid pond C2 and the control with thermostat
System C3 processed, wherein, testing liquid delivery pump inside respectively with test specimen tube 2 and the internal duct in testing liquid pond
Connection, the testing liquid in testing liquid pond is sent into the inside of test specimen tube by the testing liquid delivery pump, and with constant temperature
The control system of device is then arranged on the outside in testing liquid pond, by default steady temperature parameter to testing liquid pond
Interior testing liquid carries out thermostatic control.
Control system C3 with thermostat sets up in advance test procedure and sets the temperature of testing liquid by its control panel
Every test parameters such as degree, testing liquid flow velocity, rotating speed of transmission shaft, drying lamp opening time, overall cycle-index,
Test is set to carry out according to predetermined scheme, the testing liquid of testing liquid pond C2 is sent into sample by testing liquid delivery pump C1
The inside of cylinder 2, the corrosion simulated device B runnings in above-mentioned seawater Tidal zone, carries out corrosion simulated test.
It should be noted that because testing liquid is artificial simulated seawater, being mainly added with the salts such as sodium chloride, magnesium chloride, people
The concrete composition of work simulated seawater can be finely tuned according to the seawater component of different waters, therefore all and testing liquid directly contact
Part as samples cylinder 2, transmission protective shaft jacket B3, simulated seawater tidal range blade B4 and testing liquid pond C2 etc. are adopted
Polytetrafluoroethylene (PTFE) material makes, so that durability rises while obtaining good Corrosion Protection.
A kind of test method of simulated seawater Tidal zone corrosion, based on the examination that a kind of above-mentioned simulated seawater Tidal zone is corroded
Experiment device, it comprises the following steps that described：
1) test the preparatory stage, Sample A 3 is cleaned, drys by be measured each, weigh after uniform vertical clamping pacify
It is mounted in the ring specimen frame A1 that the barrel inside test specimen tube is fixedly installed, covers the top setting of test specimen tube 2
Cover plate 3, then prepares the testing liquid of set component in the C2 of testing liquid pond, and by the control with thermostat
The temperature of system C3 Control experiment solution；
2) test adjustment and parameter setting stage, firing test solution transfer pump C1 is by the test in the C2 of testing liquid pond
Solution injection has set the inside of the test specimen tube 2 of the other specifications such as temperature in cylinder, humidity, until the liquid level of testing liquid
The predetermined fluid level of sample can be completely flooded, testing liquid delivery pump is closed, is then restarted variable-frequency motor B2 and is regulated the speed,
With this speed as the speed of service of simulated seawater tidal range blade B4, the testing liquid of testing liquid delivery pump is then set
Flow back to the speed in testing liquid pond from the inside of test specimen tube, with this come the tidewater fluctuation of simulated seawater Tidal zone state and
Time, the baking time of drying lamp B5 unlatchings is concurrently set, the situation and sample corrosion feelings finally according to simulated marine site
Condition sets this step global cycle number of times 2)；
3) start experimental stage, start test by the start button of control system C3 of lower band thermostat, according to step
The global cycle number of times of rapid 2) middle setting rises come the tidewater for repeating to flood the seawater Tidal zone that-moist-dry-humidity-is flooded
The process for falling, after global cycle number of times is reached, off-test, whole experimental rig is automatically stopped work；
4) off-test and sample pretreating stage, whole experimental rig opens cover plate 3 after stopping, and takes out Sample A 3, examination
Sample with running water and alcohol washes and is dried up respectively again Jing after pickling.Sample is weighed after standing 24 hours in drying basin,
It is weightless according to the weight loss unit of account area before and after test, and measurement surface corrosion condition, such as maximum corrosion depth
Parameter, with this decay resistance of the material in specified sea areas Tidal zone is evaluated；
5) validation test is finished, the testing liquid in depletion test solution pool C2 and test specimen tube 2, and cleaning equipment,
Keep testing liquid pond and test specimen tube cleaning inside, drying.
A kind of experimental rig and test method of simulated seawater Tidal zone corrosion of the present invention is carrying out tidal range corrosion test
When, the sample of sheet is uniformly arranged on ring specimen frame and fixed, and ring specimen frame is then by test specimen tube inwall
Specimen mounting fixture fix, testing liquid delivery pump by the testing liquid of pre-set constant temperature from testing liquid pond inject test specimen tube
Interior, subsequent start-up variable-frequency motor drives power transmission shaft and the transmission protective shaft jacket on socket power transmission shaft to rotate together, and is driven
The simulated seawater tidal range blade arranged on protective shaft jacket is also rotated in the lump therewith, in the rotation of simulated seawater tidal range blade
Turn to drive lower testing liquid liquid level to be in wavy lifting, specimen surface is washed away repeatedly.
And the highest water level of the seawater Tidal zone in reality is to during lowest water level, the component of Tidal zone successively experienced
Sea water immersion, seawater splash, surface moisture, the process of drying, from ebb tide to flood tide experience, order is then contrary.This
Bright then realistic simulation this situation, on the one hand sample bears corrosion in During Flooding And Draining Alternating Process, while also by seawater
Wash away with sunlight (drying lamp) according to shining and sea wind is brushed sample, device of these corrosive conditions in the present invention
In can simulate one by one, its is specific as follows：
1. tidal range corrosion condition of the sample in process of the test is by amount of solution initial in test specimen tube, the velocity of rotation of blade
And the transporting velocity of testing liquid is determined.Initial soln amount (the one of such as liquid level to specimen height in setting test specimen tube
Half) after, the rotation of Motor drive blade is started, the wavy liquid level in test specimen tube under the driving effect of blade gradually rises,
Control blade rotating speed can determine liquid level, it is ensured that sample is flooded completely by testing liquid, component during simulation high tide level
Situation about being immersed in below water level, the testing liquid flowed with certain speed simulated ocean undercurrent and component rushed simultaneously
Brush is acted on.If it is necessary, organic matter, the silt in appropriate molecule simulated seawater can also be added in the solution
Deng；
2. when the testing liquid of testing liquid delivery pump flows back to testing liquid pond from the inside of test specimen tube, the liquid in test specimen tube
Face is gradually lowered, until being wholly absent, steel construction piece gradually surfaces and gradually dry process when simulating ebb tide；
3. testing liquid delivery pump into test specimen tube progressively injection testing solution when, as liquid level gradually rises in cylinder,
Solution starts to be splashed to specimen surface until flooding sample completely, simulate at the incoming tide steel construction piece from dry tack free to by
The process that gradually humidity is flooded up to wave by wave；
4. drying lamp when in test specimen tube without testing liquid on power transmission shaft is opened, and is simulated shining for sunlight and is shone, while turning
Dynamic blade drives air to simulate brush effect of the sea wind to steel construction piece through specimen surface.
A kind of experimental rig and test method of simulated seawater Tidal zone corrosion of the present invention, can perfectly simulate steel
The various complex corrosion situations that component experiences in Tidal zone, the time in such as different corrosion stages, flooding time, sample dew
Go out water surface time and drying time, can also be revised accordingly according to the sea conditions in the actual military service place of component.
A kind of experimental rig and test method of simulated seawater Tidal zone corrosion of the present invention, simple structure, it is easy to operate,
Fully simulate component during the flood tide of seawater Tidal zone, ebb tide sea water immersion, wash away and sunlight according to shine, sea wind
The corrosion process of multi-form such as brush, test parameters can be adjusted according to the hydrologic regime of different waters, can simulated
Corrosive environment under different sea situations (highest water level, wave are high), strong adaptability.And after equipment starts, equipment is according to pre-
If parameter automatic running, it is not necessary to artificial guard, can in the short period of time obtain material in seawater Tidal zone
Decay resistance.
The present invention compared with prior art, solves that existing experimental rig simulated environment is single, cannot truly simulate tidal range
The various complex corrosion environmental problems in area.And specimen mounting can simultaneously dispose multigroup sample, multiple steel can be simultaneously carried out
The tidal range Evaluation of Corrosion Resistance planted.Failure Mechanism, steel grades and marine steel knot for the corrosion of seawater Tidal zone
Structure with steel selection has important effect.
The experimental rig and test method of a kind of simulated seawater Tidal zone corrosion of the present invention, it is adaptable to which simulated seawater rises and falls
When the corrosion condition research field that causes of tidewater difference in height.
Claims (5)
1. the experimental rig that a kind of simulated seawater Tidal zone is corroded, including the oblate post being arranged on sample tube stent (1)
The test specimen tube (2) of shape, it is characterised in that：
Described test specimen tube (2) is internally provided with the specimen mounting component (A) of an annular at it, and the specimen mounting component is in tight
Arrange and fix by the barrel inside test specimen tube, cover plate (3) is provided with the top of test specimen tube；
Described test specimen tube (2) offers through hole in the center of its bottom, by the corrosion simulated dress in a seawater Tidal zone
Put (B) to load from the through hole, the corrosion simulated device in seawater Tidal zone drives the liquid surface lifting of testing liquid and washes away sample
The surface of each sample of frame component (A)；
Described test specimen tube (2) is connected with testing liquid induction system (C) pipeline, the testing liquid induction system
Testing liquid is input into test specimen tube and the constant temperature for setting is kept.
2. the experimental rig that a kind of simulated seawater Tidal zone as claimed in claim 1 is corroded, it is characterised in that described
Specimen mounting component (A) include ring specimen frame (A1), specimen mounting fixture (A2) and sample (A3), wherein, ring
Shape specimen mounting is arranged and fixed by specimen mounting fixture in the barrel inside test specimen tube, and each sample is then perpendicular
Shape is uniformly clamped in ring specimen frame.
3. the experimental rig that a kind of simulated seawater Tidal zone as claimed in claim 1 is corroded, described seawater Tidal zone
Corrosion simulated device (B) includes power transmission shaft (B1), variable-frequency motor (B2), transmission protective shaft jacket (B3), simulation sea
The poor blade of torrent (B4) and drying lamp (B5), wherein, the center that power transmission shaft passes through test specimen tube (2) bottom
The through hole for opening up is inserted perpendicularly into the inside of test specimen tube, and the lower end of power transmission shaft is connected and by the variable-frequency motor with variable-frequency motor
Control and rotate, on the axle body of the inside of power transmission shaft insertion test specimen tube transmission protective shaft jacket is socketed with, power transmission shaft protection
The lower end of set seals the through hole that the center of test specimen tube bottom opens up, and is driven the length of protective shaft jacket higher than test
The highest liquid level of solution, simulated seawater tidal range blade has 3 or 4, in interval 120 ° or 90 ° of circumference uniform distributions
Being arranged on for formula is driven with the set of protective shaft jacket, and is then provided with 3～4 at equal intervals at the top of transmission protective shaft jacket
Distribution drying lamp.
4. the experimental rig that a kind of simulated seawater Tidal zone as claimed in claim 1 is corroded, it is characterised in that described
Testing liquid induction system (C) include testing liquid delivery pump (C1), testing liquid pond (C2) and band constant temperature dress
The control system (C3) put, wherein, testing liquid delivery pump inside respectively with test specimen tube (2) and testing liquid
The internal duct connection in pond, is sent into the testing liquid in testing liquid pond in test specimen tube by the testing liquid delivery pump
Portion, and the control system with thermostat is then arranged on the outside in testing liquid pond, by default steady temperature parameter
Thermostatic control is carried out to the testing liquid in testing liquid pond.
5. the test method that a kind of simulated seawater Tidal zone is corroded, based on the claims 1 to claim 4
The experimental rig of simulated seawater Tidal zone corrosion is planted, it comprises the following steps that described：
1) test the preparatory stage, sample (A3) is cleaned, drys by be measured each, weigh after uniform vertically clamp
In the ring specimen frame (A1) that the barrel inside test specimen tube is fixedly installed, the top of test specimen tube (2) is covered
The cover plate (3) that portion is arranged, then prepares the testing liquid of set component in testing liquid pond (C2), and by band
The temperature of control system (C3) the Control experiment solution of thermostat；
2) test adjustment and parameter setting stage, firing test solution transfer pump (C1) is by testing liquid pond (C2)
Testing liquid injection set the other specifications such as temperature in cylinder, humidity test specimen tube (2) inside, until test it is molten
The liquid level of liquid can completely flood the predetermined fluid level of sample, close testing liquid delivery pump, then restart variable-frequency motor (B2)
Regulate the speed, with this speed as the speed of service of simulated seawater tidal range blade (B4), then set testing liquid defeated
The testing liquid for sending pump flows back to the speed in testing liquid pond from the inside of test specimen tube, and with this tide of simulated seawater Tidal zone is carried out
The state of water fluctuation and time, the baking time of drying lamp (B5) unlatching is concurrently set, finally according to simulated marine site
Situation and sample corrosion condition set this step global cycle number of times 2)；
3) start experimental stage, by the start button of the control system (C3) of lower band thermostat test is started, according to
Step 2) in setting global cycle number of times repeating to flood-it is moist-be dried the tidewater of the seawater Tidal zone that-humidity-is flooded
The process of fluctuation, after global cycle number of times is reached, off-test, whole experimental rig is automatically stopped work；
4) off-test and sample pretreating stage, whole experimental rig opens cover plate (3) after stopping, and takes out sample (A3),
Sample with running water and alcohol washes and is dried up respectively again Jing after pickling.Sample claims after standing 24 hours in drying basin
Weight, it is weightless according to the weight loss unit of account area before and after test, and measurement surface corrosion condition, it is such as maximum to corrode deep
The parameters such as degree, with this decay resistance of the material in specified sea areas Tidal zone is evaluated；
5) validation test is finished, the testing liquid in depletion test solution pool (C2) and test specimen tube (2), and is cleared up
Equipment, keeps testing liquid pond and test specimen tube cleaning inside, drying.
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| CN201510727773.4A CN106644906A (en) | 2015-10-30 | 2015-10-30 | Test device for simulating seawater tide-difference zone corrosion and test method |
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| CN113945471A (en) * | 2021-11-22 | 2022-01-18 | 东北林业大学 | Concrete washout test device under load and environment coupling effect |
| 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 |
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Effective date of registration: 20180914 Address after: 524000 building 12-15, building 46, Renmin Road, Zhanjiang, Guangdong Applicant after: Baosteel Zhanjiang Iron & Steel Co., Ltd. Applicant after: Baoshan Iron & Steel Co., Ltd. Address before: 201900 Fujin Road, Baoshan District, Shanghai 885 Applicant before: Baoshan Iron & Steel Co., Ltd. |
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Application publication date: 20170510 |