CN103543077B - A kind of injecting type erosion corrosion test device - Google Patents
A kind of injecting type erosion corrosion test device Download PDFInfo
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Abstract
A kind of injecting type erosion corrosion test device, belongs to metal material corrosion-resistant field.Adopt polytetrafluoroethylplastic plastic to be pipeline loop material, device comprise constant temperature liquid reserve tank, wash away room, teeter chamber, ebullator, pipeline loop, nozzle, semicolumn sample stage, fixture.Ebullator serial connection frequency converter changes pump housing operating frequency and realizes zero level speed change, at the pipeline loop of ebullator back segment, electromagnetic flowmeter Real-Time Monitoring flow is installed, teeter chamber establishes inside poly-gear, installs outside varying-speed motor driven wheel stirred fluid, guarantees solid particle even suspension in fluid.Clamping device comprises a semicolumn sample stage and fixture, washes away angle by specimen rotating holder alter.Wash away the sample putting contrast electrode and auxiliary electrode and holder in indoor and form three-electrode system, connect electrochemical workstation and computing machine outward, accurately can control, realize the real-time dynamic electric chemical measurement at different fluid flow velocity, angle, temperature.
Description
Technical field
The present invention relates to a kind of fluid scouring corrosion testing apparatus of metal material, experimental enviroment factor is controlled, accurately can measure material at different temperatures, flow velocity and the Electrochemistry Information under washing away angle.
Background technology
Erosion corrosion is the corrosion that material occurs under fluid scouring and Corrosion Interaction.Pipeline is subject to the erosion corrosion effect of fluid can make tube wall locally thinning and then perforation inefficacy in use procedure, and this phenomenon extensively exists at the pipe bend in the fields such as oil, chemical industry, electricity power.It is reported, the industrial explosion of 95%, fire, Leakage Gas all occur in tube bends or elbow and the pump leaked or operation valve place.So pipe bend erosion corrosion research enjoys the extensive concern of Chinese scholars all the time.At present, the device for material erosion corrosion test is divided into fluid-guiding type, injecting type and rotary three classes, is applicable to different operating mode, respectively has its relative merits.Revolving type experiments device is placed in bottom slurry due to metal rotary disk sample stage, can wear and tear, produces and corrode with Korrosionsmedium and solid particle, and the encapsulation clamping of sample is also had any problem.Fluid-guiding type test unit can be simulated preferably and evaluate actual condition, but equipment set floor area is large, and required testing liquid amount is many, and the test period is long and test unit maintenance cost is high.Traditional injecting type device energy well coutroi velocity, sample geo-stationary simultaneously, electro-chemical test ratio is easier to, but traditional injecting type device adopts shower nozzle water delivering orifice size to carry out coutroi velocity, fluid circulation time is made to cause sharp wear at narrow caliber pipe place, cause fluid warming phenomenon, fluid temperature (F.T.) controls not easily, and the actual corrosion condition of test findings is serious simultaneously.Erosion corrosion test device by sample stage, wash away room, temperature control system, flow velocity control system, electrochemical test system form.Existing injecting type erosion corrosion test device amount of solution used is large, system circuit is easily corroded, sample clamping and fixture and sample encapsulate difficulty, easily and sample form bimetallic corrosion and affect and cause electro-chemical test accuracy.In order to obtain higher eroding velocity, and adopting hand line nozzle, sample being worn and torn uneven, under simultaneously high eroding velocity, fluid and pipe friction cause heating, make test findings than actual condition seriously corroded.
Summary of the invention
In order to when overcoming existing injecting type erosion corrosion test device high flow rate, testing liquid significantly heats up, be mixed into device metal ion and device retaining part and sample in the large and loop of the wear extent in loop and easily form bimetallic corrosion, cause telephoning telephony to test affected problem.The invention provides a kind of test unit, realized the controlled continuously and real-time accurate electro-chemical test of rate of flow of fluid, temperature, fluid scouring angle by appropriate design fixture and fluid circuit, equipment loss is low, safeguards simple.
The technical solution adopted for the present invention to solve the technical problems is: injecting type erosion corrosion testing machine comprises constant temperature liquid reserve tank 11, washes away room 14, teeter chamber 13, ebullator 7, pipeline loop 12, nozzle 17, semicolumn sample stage 21, fixture 16, sample stage 21 is provided with sample cell, spring is established to follow anti-corrosion pad bottom sample cell, spring one end is used for and sample contacts, the other end connects wire, drawn by the inner aperture of sample stage 21 and wash away room 14, connect electrochemical workstation; Washing away lower end, room 14 is funnel-form, connection teeter chamber, bottom 13, teeter chamber 13 with wash away room and be placed in constant temperature liquid reserve tank 11; Ebullator 7 is connected in series frequency converter 6 and realizes zero level speed change, at the pipeline loop of ebullator 7 back segment, electromagnetic flowmeter 10 is installed and detects flow, gear 8 is equipped with in inside in teeter chamber 13, outside varying-speed motor 9 driven wheel stirred fluid is installed, wash away the sample establishing built-in contrast electrode 20 and auxiliary electrode 19 and fixture 18 to clamp in room 14 and form three-electrode system, outer even electrochemical workstation and computing machine.
Wash away chamber interior and be bonded with teflon lower baffle plate 15, the bonding overhead gage 2 in top, there is circular groove lower baffle plate 15 upper end, the manhole that overhead gage 2 has one to be less than semicolumn sample stage 21 diameter, two baffle plates coordinate and are used for fixing semicircle column type sample stage 21, wash away top, room 14 and separately have two manholes, the glass stopper sealing of its central band through hole in through hole use, the through hole in the middle of glass stopper draws the wire than electrode 20 and auxiliary electrode 19.
Wash away inside, room 14 and be provided with hygrosensor 3 Real-Time Monitoring fluid temperature (F.T.), Temperature displaying is on control panel 1, by control panel 1 design temperature, when washing away chamber interior fluid temperature (F.T.) higher than design temperature, the refrigeration of constant temperature liquid reserve tank and compressor starts work, by the refrigerator 4 in constant temperature liquid reserve tank 11, the fluid temperature in constant temperature liquid reserve tank 11 is declined, fluid temperature (F.T.) in coincidence circuit declines, otherwise, thermopair 5 starts heating, fluid temperature in constant temperature liquid reserve tank 11 rises, in loop, fluid temperature (F.T.) rises, iterative cycles like this controls to wash away the stable of fluid inside temperature.
Fixture 16 comprises sample cell and tapped through hole, wire through-hole is had bottom sample cell, cell wall is provided with M12 tapped through hole, sample is placed in sample cell, wire is drawn by bottom through-hole, the distance of the plastic bolt adjustment bolt and the other end cell wall that are provided with by rotary sample groove one end clamps the sample of difformity and size, and sample cell establishes through hole in corner outward, by screwing supporting plastic bolt and rotating semicircular post sample stage 21 assembles.
Sample stage 21 is two ends is cylinder, and centre is the rotating semicircular post of semicolumn, and upper bottom surface has angle graticule, determines to wash away angle during rotation by the scale of angle graticule and overhead gage 2, and overhead gage 2 wooden partition establishes tapped through hole and supporting plastic bolt.
Pipeline loop adopts friction factor little and the polytetrafluoroethylmaterial material of acid and alkali-resistance, and sample stage 21, fixture 16, nozzle 17, gear 8 and whole room of washing away are made by teflon.Pipeline loop establishes magentic flowmeter, frequency converter connects anti-corrosion membrane pump, and pump used is commercially available Teflon septum pump, regulates the flow of frequency converter frequency control pump.Loop nozzle is placed in and washes away room, can change the nozzle of different inner diameters as required.According to flowmeter display flow and nozzle inside diameter size, can eroding velocity be drawn by following formula:
Q=vtπ(R/2)
2
In formula, Q is meter readings m
3/ h, v and rate of flow of fluid, unit m/s, R are nozzle inside diameter, unit mm.
The invention has the beneficial effects as follows, at fine adjustment fluid temperature (F.T.), flow velocity and while washing away angle, the electro-chemical test of sample under various corrosive fluids can be carried out accurately in real time.
Accompanying drawing explanation
Fig. 1 is essential structure schematic diagram of the present invention.
In Fig. 1: 1. temperature control panel; 2. overhead gage; 3. hygrosensor; 4. refrigerator; 5. thermopair; 6. frequency converter; 7. ebullator; 8. gear; 9. motor; 10. electromagnetic flowmeter; 11. constant temperature liquid reserve tanks; 12. pipelines; 13. teeter chambers; 14. wash away room; 15. lower baffle plates; 16. fixtures; 17. nozzles; 18. samples; 19. auxiliary electrodes; 20. contrast electrodes; 21. semicolumn sample stages; 22. electrochemical workstations; 23 computing machines.
Fig. 2 is rotating semicircular post sample stage schematic diagram.
Fig. 3 is fixture schematic diagram.
Fig. 4 is the assembly drawing of semicolumn sample stage and fixture.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
In FIG, temperature control panel 1, hygrosensor 3, refrigerator 4, thermopair 5 form temperature control system.Hygrosensor 3 is placed in and washes away in room 14, and refrigerator 4 and thermopair 5 are placed in the constant temperature fluid storage tank 11 washing away outside, room 14.Wash away connection teeter chamber, lower end, room 13, the lower end of teeter chamber 13 connects ebullator 7, and ebullator 7, ebullator 7 is connected to by teflon pipeline 12 the polytetrafluoroethylplastic plastic nozzle 17 washed away in room 14 and forms fluid circulation loop.Ebullator 7 Series Frequency Conversion device 6 connects power supply, electromagnetic flowmeter 10 is installed by the teflon pipeline 12 that ebullator 7 is middle with polytetrafluoroethylplastic plastic nozzle 17 and detects flow.Wash away inside, room 14 and establish sample clamping device, comprise semicolumn sample stage 21, the overhead gage 2 of fixture 16 and fixing semicolumn sample stage 21 and lower baffle plate 15.Sample 18 back side connects wire and is fixed on clamping device, sample is drawn as working electrode from clamping device via wire, wash away the built-in contrast electrode 20 in room 14 and auxiliary electrode 19 forms three electrode test systems with working electrode, can in scour process the Electrochemistry Information of real time dynamic measurement sample surfaces.Outreach electrochemical workstation 22 and computing machine 23.The built-in polytetrafluoroethylplastic plastic gear 8 in teeter chamber 13, drives stirred fluid by external motor 9.
Velocity of flow adjust adjusts ebullator 7 motor speed to control uninterrupted by frequency converter 6, and ebullator 7 is commercially available FUH anticorrosive anti-wear pump, maximum flow 10m
3/ h.Obtain fluid units time flow by the reading of electromagnetic flowmeter 10, the internal diameter R of known polytetrafluoroethylplastic plastic nozzle 17 and unit interval fluid flow Q/t, according to formula Q=vt π (R/2)
2fluid scouring speed can be determined, otherwise, flow can be determined according to fluid scouring speed, and then setting respective frequencies.The solution of internal flow suspended particle drives stirring to complete by the built-in polytetrafluoroethylplastic plastic gear 8 in teeter chamber 13 with external motor 9.Wash away inner and top, room 14 and be bonded with teflon lower baffle plate 15, there is Φ 80mm × 5mm degree of depth circular groove lower baffle plate 15 upper end, overhead gage 2 has a Φ 80mm manhole for fixing semicolumn sample stage 21, wooden partition is provided with tapped through hole and supporting plastic bolt, fixes semicolumn sample stage 21 after washing away angle for adjustment.
Semicolumn sample stage 21 is provided with sample cell, spring is established to follow anti-corrosion pad bottom sample cell, spring one end is used for and sample contacts, the other end connects wire and washes away room connection electrochemical workstation by the inner aperture extraction of semicolumn sample stage, avoid sample and any position of device to form galvanic couple, guarantee the stability of washing away.As shown in Figure 2, the two ends of semicolumn sample stage 21 are cylinder, centre is prolonged diameter and is cutd open and put down as semicolumn, upper bottom surface has angle graticule, determine to wash away angle by the scale of angle graticule and baffle plate 2 during rotation, overhead gage wooden partition establishes tapped through hole and supporting plastic bolt, semicolumn sample stage 21 screws plastic bolt after adjusting angle and is fixed, sample stage stage casing semicolumn plane is provided with the screw thread with fixture surrounding tapped through hole inscribe, uses plastic bolt to be fixed in the plane of semicolumn sample stage 21 by fixture.Wash away the glass stopper sealing that top, room separately has the manhole center of two Φ 20mm with holes, the through hole in the middle of glass stopper draws the wire of contrast electrode 20 and auxiliary electrode 19.Pipeline loop adopts friction factor little and the polytetrafluoroethylmaterial material of acid and alkali-resistance, and semicolumn sample stage 21, fixture 16, nozzle 17, gear 8 and whole room of washing away also make by teflon.Wash away room 14 fluid temperature (F.T.) to control by temperature control panel 1 design temperature, fluid inside temperature is washed away in hygrosensor 3 real-time detection, freezed by the condensed fluid in refrigerator 4 and thermopair 5 pairs of constant temperature liquid reserve tanks 11 or heated again, and then water bath with thermostatic control is carried out to the fluid washed away in room 14, the temperature of room is washed away in accurate control, controlled range 5 DEG C ~ 90 DEG C.
As shown in Figure 2 and Figure 3, fixture 16 comprises sample cell and tapped through hole, wire through-hole is had bottom sample cell, cell wall is provided with M12 tapped through hole, sample draws wire by bottom through-hole after being placed in sample cell, clamped the sample of difformity and size by the distance of the adjustment of rotary plastic bolt bolt and other end cell wall, through hole is established in the outer corner of sample cell, assembles for fixture 16 and rotating semicircular post sample stage 21.
The present invention, by accurate control of fluid eroding velocity, angle and temperature, achieves sample dynamic electro-chemical test in real time.
Claims (2)
1. an injecting type erosion corrosion test device, comprise constant temperature liquid reserve tank (11), wash away room (14), teeter chamber (13), ebullator (7), pipeline loop (12), nozzle (17), semicolumn sample stage (21), fixture (16), it is characterized in that: semicolumn sample stage (21) is provided with sample cell, spring and anti-corrosion pad is established bottom sample cell, spring one end is used for and sample contacts, the other end connects wire, wire is drawn by the inner aperture of semicolumn sample stage (21) and is washed away room (14), connect electrochemical workstation, washing away room (14) lower end is funnel-form, connection teeter chamber, bottom (13), teeter chamber (13) with wash away room (14) and be placed in constant temperature liquid reserve tank (11), ebullator (7) serial connection frequency converter (6) realizes zero level speed change, installs electromagnetic flowmeter (10) detect flow at the pipeline loop of ebullator (7) back segment, gear (8) is equipped with in teeter chamber (13) inside, installs outside varying-speed motor (9) driven wheel stirred fluid, wash away room (14) and establish built-in contrast electrode (20) and auxiliary electrode (19), the sample that contrast electrode (20) and auxiliary electrode (19) and fixture (18) clamp forms three-electrode system, connects electrochemical workstation and computing machine outside three-electrode system, wherein: wash away room (14) viscous and be connected to teflon lower baffle plate (15), the bonding overhead gage in top (2), there is circular groove lower baffle plate (15) upper end, overhead gage (2) has a diameter to be less than the manhole of semicolumn sample stage diameter, two baffle plates coordinate and are used for fixing semicolumn sample stage, wash away the glass stopper sealing that its central band through hole in two manholes use is separately arranged at room (14) top, the through hole in the middle of glass stopper draws the wire of contrast electrode (20) and auxiliary electrode (19),
Wherein: wash away room (14) inside and be provided with hygrosensor (3) Real-Time Monitoring fluid temperature (F.T.), Temperature displaying is on control panel (1), by control panel (1) design temperature, when washing away chamber interior fluid temperature (F.T.) higher than design temperature, the refrigeration of constant temperature liquid reserve tank and compressor starts work, by the refrigerator (4) in constant temperature liquid reserve tank (11), the fluid temperature in constant temperature liquid reserve tank (11) is declined, the fluid temperature (F.T.) in coincidence circuit declines; Otherwise thermopair (5) starts heating, the fluid temperature in constant temperature liquid reserve tank (11) rises, and in loop, fluid temperature (F.T.) rises, and iterative cycles like this controls to wash away the stable of fluid inside temperature;
Wherein: fixture (16) comprises sample cell and tapped through hole, wire through-hole is had bottom sample cell, cell wall is provided with M12 tapped through hole, sample is placed in sample cell, wire is drawn by bottom through-hole, the distance of the plastic bolt adjustment bolt and the other end cell wall that are provided with by rotary sample groove one end clamps the sample of difformity and size, and sample cell establishes through hole in corner outward, by screwing supporting plastic bolt and rotating semicircular post sample stage (21) assembles;
Wherein: semicolumn sample stage (21) is two ends is cylinder, centre is the rotating semicircular post of semicolumn, upper bottom surface has angle graticule, determine to wash away angle by the scale of angle graticule and overhead gage (2) during rotation, overhead gage (2) wooden partition establishes tapped through hole and supporting plastic bolt.
2. injecting type erosion corrosion test device according to claim 1, it is characterized in that: pipeline loop adopts friction factor little and the polytetrafluoroethylmaterial material of acid and alkali-resistance, and semicolumn sample stage (21), fixture (16), nozzle (17), gear (8) and whole room of washing away are made by teflon.
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| CN201310507370.XA CN103543077B (en) | 2013-10-24 | 2013-10-24 | A kind of injecting type erosion corrosion test device |
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| CN201310507370.XA CN103543077B (en) | 2013-10-24 | 2013-10-24 | A kind of injecting type erosion corrosion test device |
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| CN103543077A CN103543077A (en) | 2014-01-29 |
| CN103543077B true CN103543077B (en) | 2016-02-03 |
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