A kind of temperature and vibration coupling Experiment on Function device and test methodTechnical field
The present invention relates to the experimental rigs and test method at a kind of temperature and vibration coupling action condition, it is especially suitableIn performance test research of the oil-gas pipeline erosion resistant coating at temperature and vibration coupling action condition.
Background technique
Anticorrosion engineering association, the U.S. points out: " corrosion-inhibiting coating correctly coated can provide 99% pipeline for buried pipelineOuter protection demand, remaining 1% is provided by cathodic protection." illustrate that the external anti-corrosion layer of long oil and gas pipeline is to ensure that pipe safetyImportant barrier.Petroleum, the breakage of Gas Buried Pipelines erosion resistant coating, removing and aging etc., the burn into that will cause pipeline is wornHole, leakage, bring serious property loss to enterprise, bring harm to the public and environment.The underground oil and gas pipeline in China is gone into operationIt is commonplace that i.e. there is a situation where corrosion failures after 1-2, it not only causes oil, vapour leakage loss because of caused by perforation, withAnd it is lost caused by the material as brought by maintenance, the waste on manpower and halt production shut-down, but also may cause because of corrosionFire, especially finished product oil pipe threaten personal safety, pollute environment, consequence is extremely serious because exploding caused by corrosion.For preventionThe generation of similar incidents, corrosion-proof technology for pipeline are increasingly valued by people.
2014, Tubular Goods Research Center of China National Petroleum Corporation was in the station of certain more than 10 compressor station of gas transmission linePipeline has carried out Corrosion monitoring and evaluation, it is found that the compressor outlet pipeline external anti-corrosion layer with the presence of 3 compressor stations falls off causesTube body is there is a phenomenon where corroding, and respectively A compressor station 1# machine set outlet pipeline to air-cooled elbow, B compressor station 1,2# unit go outMouth header is worn at cable duct and C compressor station 1# compressor computer room exit, testing result discovery is summarized, in burying for compressor outletOn ground pipeline, different degrees of erosion resistant coating has occurred and falls off and damages, and large area is caused to corrode, seriously affects pipeline safetyOperation.
External for erosion resistant coating micromechanism of damage, Worsley et al. thinks that porosity is the another of the resistance to cathodic disbonding of coatingThe permeability of a key factor, the media such as coating intermediate ion, water and oxygen depends on porosity, the media such as the higher water of porosity and oxygenPermeability is stronger.Miszczyk thinks, temperature height and coating stripping speed have obvious relation between persistence, as the temperature rises coatingCathodic disbonding speed is accelerated.
The country, China Petroleum Group Engineering and Technology Research Institute is to substrate deformation amount to the performance affecting laws of 3PE erosion resistant coatingIt is studied, it is believed that peel strength and cathodic disbonding performance can increase with the increase of substrate deformation amount.Zhejiang University's researchThe influence that OH-ion damages erosion resistant coating, it is believed that the migration of OH- will cause polymer and the cohesive force of metal and reduce, make withThe substrate metal oxide layer dissolution gassing of erosion resistant coating bonding, removing.These researchs disclose erosion resistant coating in component environmentUnder the conditions of micromechanism of damage, provide theoretical basis for pipeline corrosion protection, but have no buried under the effect of temperature and vibration couplingThe relevant report of the micromechanism of damage research of pipeline anticorrosion coating.
Therefore, the injuring rule research for carrying out erosion resistant coating under different temperatures guarantees buried erosion resistant coating failure mechanism is graspedAnti-corrosion pipeline safe operation has important theory directive significance and engineering application value.However, from the angle of test complexityIt sets out, adjust during the experiment and single temperature factor is kept to be easier to realize, if cathodic disbonding is tested, can pass throughRegulating thermostatic box temperature degree or waters chamber temperature, to keep the experimental enviroment of sample.However in temperature and vibration couplingDuring the test of cooperation, experimental enviroment was not only needed to keep higher steady temperature (such as 60 DEG C, 70 DEG C), but also needed pairErosion resistant coating sample applies oscillating load, does not appear in the newspapers in the document that current this kind of test method and apparatus is at home and abroad investigatedRoad, and the problem is undecided always, annoyings insider.
Summary of the invention
In order to solve the problems, such as that temperature and vibration coupling act on the test method and apparatus of lower erosion resistant coating, the present invention is proposedA kind of temperature and vibration coupling Experiment on Function device and test method.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of temperature and vibration coupling Experiment on Function device, including insulating box, shake table and connecting tooling, insulating box and vibrationDynamic platform is fixed together by connecting tooling, wherein the connecting tooling includes fastening plates, pressing plate and for placing insulating boxBottom plate, fastening plates and pressing plate are arranged on bottom plate.
A further improvement of the present invention lies in that bottom plate is oblong-shaped frame, fastening is provided between two long sides of bottom platePlate.
A further improvement of the present invention lies in that fastening plates are 2, and it is arranged in parallel.
A further improvement of the present invention lies in that pressing plate is vertically arranged in the long side of bottom plate by stay bolt.
A further improvement of the present invention lies in that bolt is welded and fixed with back plate connections；Stay bolt is arranged in bottom end.
A further improvement of the present invention lies in that offering hole on fastening plates and bottom plate, corresponding hole is offered on shake table,Lag bolt fastening plates by passing through hole are fixed with shake table with bottom plate.
A kind of test method of temperature and vibration coupling Experiment on Function device, comprising the following steps:
1) sample with erosion resistant coating is placed in insulating box, and is connected sample and potentiostat with conducting wire and platinum electrodeIt connects；
2) potentiostat is opened, test voltage is debugged to 1.5V, later on insulating box play button, insulating box startsHeating, and temperature parameter is set as test objective temperature；
3) shaketalle test parameter is set, comprising: frequency and acceleration are then turned on shake table, start temperature and vibrationCoupling test；
4) after certain test period, sample is taken out, cathodic disbonding test is carried out to the erosion resistant coating of sample.
A further improvement of the present invention lies in that the sample structure with erosion resistant coating is plate tensile sample, portion bores one in the sampleA size is the circular hole of 6mm, drills through erosion resistant coating, leaks out substrate；With sealant by prefabricated plastic cylinder with sample is concentric gluesKnot is formed using test specimen as the test flume at bottom, and the NaCl solution that mass concentration is 3% is added in test flume.
A further improvement of the present invention lies in that plate tensile sample size is not more than 150cm × 150cm × 6mm.
A further improvement of the present invention lies in that NaCl solution is added to high 3/4 of test flume.
The prior art is compared, the invention has the benefit that
The present invention is by the way that insulating box to be arranged on a vibration table, so that can be achieved at the same time temperature and vibration in testErosion resistant coating performance test under coupling；The apparatus structure is simple, operation is convenient；Temperature provided by the invention and vibration couplingThe erosion resistant coating performance test that effect erosion resistant coating performance testing device and specimen method solve at temperature and vibration coupling effect triesThe problem of experiment device and test method, has filled up temperature and vibration coupling acts on the blank in lower erosion resistant coating performance test field, intoAnd performance data of the erosion resistant coating at temperature and vibration coupling effect can be obtained, it is ground so as to carry out erosion resistant coating injuring ruleStudy carefully.The present invention has weight to the scientific researches such as erosion resistant coating performance test, the research of erosion resistant coating injuring rule, material improvement promotion and engineer applicationWant meaning.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of experimental rig of the present invention；
Fig. 2 is the schematic shapes of experimental rig shake table of the present invention；
Fig. 3 is the schematic shapes of experimental rig connecting tooling of the present invention；
In figure, 1 is insulating box, and 2 be shake table, and 3 be connecting tooling, and 4 be bottom plate, and 5 be pressing plate, and 6 be fastening plates, and 7 be lengthBolt.
Specific embodiment
In order to understand the present invention in depth, with reference to the accompanying drawing and specific embodiment the present invention is described in detail.
Referring to figures 1-3, temperature provided by the invention and vibration coupling Experiment on Function device include insulating box 1, shake table 2It is formed with connecting tooling 3.Insulating box 1 is fixed together with shake table 2 by connecting tooling 3, i.e. shake table 2 and insulating box 1When working at the same time, while insulating box 1 keeps constant temperature, insulating box 1 keeps vibration on shake table 2, to reach temperatureDegree is acted on vibration coupling.
Referring to Fig. 3, connecting tooling 3 is made of bottom plate 4, fastening plates 6, stay bolt, pressing plate 5 and lag bolt.
Bottom plate 4 is oblong-shaped frame, and there are two fastening plates 6 disposed in parallel, pressing plate 5 is logical for setting between the long side of bottom plate 4Cross stay bolt 7 be vertically arranged in bottom plate 4 long side it is upper, the both ends of the long side of specific bottom plate 4 are provided with stay bolt 7, longPressing plate 5 is provided between the top of two stay bolts 7 on side；Bolt 7 is fixed together by welding with 4 junction of bottom plate,Offer hole on fastening plates 6 and bottom plate 4, corresponding hole offered on shake table 2, by pass through the lag bolt fastening plates 6 in hole withBottom plate 4 is fixed with shake table 2.Connecting tooling 3 and shake table 2 are fixed together by fastening plates 6 and lag bolt.By constant temperatureCase 1 is placed on bottom plate 4, and insulating box 1 and connecting tooling 3 are fixed together with pressing plate 5 by stay bolt.Wherein, stay bolt 7It is fixed together by welding with 4 junction of bottom plate, stay bolt is connect by stay bolt itself with pressing plate 5 with 5 junction of pressing plateIt is fixed together.
Insulating box 1 can provide stationary temperature environment during the test.
Shake table 2 can provide the vibration conditions such as constant vibration frequency, acceleration during the test.
For the present invention when carrying out the erosion resistant coating performance test at temperature and vibration coupling effect, detailed process is as follows:
Mass concentration 3%NaCl solution is added into the erosion resistant coating cathodic disbonding sample after processing, is then placed into above-mentionedIn the insulating box 1 of invention test device, and sample is connect with potentiostat with conducting wire and platinum electrode.
Potentiostat is opened, test voltage is debugged to 1.5V, confirms the voltage of platinum electrode and application in NaCl solutionAfter working with erosion resistant coating sample, ie in solution starts after bubbling, and constant temperature chamber door is closed.
Insulating box play button is opened, insulating box starts to warm up, and temperature parameter is set as test objective temperature.
Default shake table sets test parameters, comprising: frequency and acceleration.After ready, shake table 2 is opened, starts temperatureDegree is tested with vibration coupling.
After certain test period, pass hull closure takes out erosion resistant coating sample, carries out cathodic disbonding test to erosion resistant coating.
Test method based on above-mentioned experimental rig the following steps are included:
Referring to Fig. 1, shake table is connect with insulating box by connecting tooling.
2) connecting tooling 3 and shake table 2 are fixed together by fastening plates 6 and lag bolt.
3) insulating box 1 is placed on bottom plate 4, is fixed on insulating box 1 and connecting tooling 2 with pressing plate 5 by stay bolt 7Together.Wherein, stay bolt 7 is fixed together by welding with 4 junction of bottom plate, and stay bolt 7 and 5 junction of pressing plate pass through long spiral shellBolt itself is connected and fixed with cover board.
4) the erosion resistant coating sample processed is plate tensile sample, and size is not more than 150cm × 150cm × 6mm, and portion in the sampleThe circular hole that a size is 6mm is bored, erosion resistant coating is drilled through, leaks out substrate.It is with sealant that prefabricated plastic cylinder and sample is sameHeart bonding, forms the test flume with test specimen the bottom of for, and adding mass concentration in slot is 3%NaCl (m/m) solution, is added to slotHigh 3/4.
5) ready sample is placed in insulating box 1, and is connect sample with potentiostat with conducting wire and platinum electrode.
6) potentiostat is opened, test voltage is debugged to 1.5V, confirms the voltage of platinum electrode and application in NaCl solutionIn work with erosion resistant coating sample after, ie in solution starts after bubbling, and constant temperature chamber door is closed.Later on insulating box work is pressedButton, insulating box start to warm up, and temperature parameter is set as test objective temperature, and such as 60 DEG C.
7) shaketalle test parameter is set, comprising: frequency, acceleration, such as 500Hz, 80m/s.After ready, vibration is openedDynamic platform, start temperature and vibration coupling are tested.Notice whether temperature changes with vibration parameters during test, such as variation needsAdjustment in time.
8) after certain test period, such as 48h, pass hull closure takes out erosion resistant coating sample, carries out cathode stripping to erosion resistant coatingFrom test.
9) the erosion resistant coating cathodic disbonding data that test obtains are the erosion resistant coating cathode at temperature and vibration coupling effectRemove data.
Temperature provided by the invention and vibration coupling effect erosion resistant coating performance testing device and specimen method solve temperatureWith the erosion resistant coating performance testing device under vibration coupling effect and the problem of test method, temperature and vibration coupling have been filled upThe blank in lower erosion resistant coating performance test field is acted on, and then performance of the erosion resistant coating at temperature and vibration coupling effect can be obtainedData, so as to carry out erosion resistant coating injuring rule research.The present invention grinds erosion resistant coating performance test, erosion resistant coating injuring ruleStudy carefully, material improvement promoted etc. scientific researches and engineer application it is significant.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effectsIt is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the inventionBright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present inventionProtection scope within.