CN201945545U - Erosion corrosion test device for metal components in sea water piping system - Google Patents
Erosion corrosion test device for metal components in sea water piping system Download PDFInfo
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- CN201945545U CN201945545U CN 201020528693 CN201020528693U CN201945545U CN 201945545 U CN201945545 U CN 201945545U CN 201020528693 CN201020528693 CN 201020528693 CN 201020528693 U CN201020528693 U CN 201020528693U CN 201945545 U CN201945545 U CN 201945545U
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- fluoroplastic
- erosion corrosion
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- sea water
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Abstract
The utility model relates to an erosion corrosion test device for metal components in a sea water piping system, which comprises a fluoroplastic centrifuge pump and a water storage tank, wherein a cooling system is arranged on the inner side wall of the water storage tank, an inlet of the fluoroplastic centrifuge pump is connected with the water storage tank, an outlet main pipeline of the fluoroplastic centrifuge pump is connected with a plurality of working pipelines which are connected in parallel, each working pipeline is connected with a flow regulating valve, a vortex shedding flowmeter and working pipe sections sequentially, and the outlet end of the working pipelines in parallel connection is connected to the water storage tank by a loop; the outlet main pipeline of the fluoroplastic centrifuge pump is also provided with a bypass which is communicated with the water storage tank; and the working sections are electrically connected with an electrochemical test device. The device is capable of testing erosion corrosion performance of different pipe samples on the condition that medium, temperature and flow velocity are closely the same, and can be used for researching the erosion corrosion resisting performances of the same material on the condition that medium velocities are different.
Description
Technical field
The utility model relates to a kind of testing equipment, relates in particular to a kind of sea water piping system hardware erosion corrosion test unit.
Background technology
Erosion corrosion is of common occurrence in oceanographic engineering, because degeneration and erosion that erosion corrosion causes suffer damage oceanographic equipments such as pipeline, container, heat exchanger, increase production cost thus, cause extension, increase cost of upkeep, can cause serious accident when more serious.Erosion corrosion is the bigger local corrosion of a kind of harm, and is much more serious than simple corrosion and simple mechanical wear, can quicken it when equipment is subjected to erosion corrosion and damage, thereby shortened the serviceable life of equipment greatly.In order to alleviate these problems, test in advance is very with practical value near the anti-erosion corrosion performance of various materials under the actual operating position.
Erosion corrosion (Erosion-Corrosion) be metal surface and corrosive fluids owing to the metal that the high speed relative motion causes damages phenomenon, be that material is washed away and corrodes synergistic result.Erosion corrosion is a very complicated process, and influence factor is a lot, and the chemical constitution of material itself, institutional framework, mechanical property, hardness, surfaceness, corrosion resisting property etc. are aspects; And the concentration of the temperature of medium, pH value, dissolved oxygen DO, various active ions, viscosity, density, solid phase and gas phase content, solid phase particles and the hardness in liquid phase is on the other hand; And the shape of filter element, flow rate of fluid and fluidised form also tool have a significant impact, because different velocity flow patterns can make fluid that material surface is produced different mechanics effects, than other factors, pH value, temperature and flow velocity are the most obvious to the influence of erosion corrosion.
The water body that pH value is different, metal erosion rate difference, be since the character of surperficial produced film with due to composition is different.Have only in medium to have added enough oxygenants, have the metal of passive behavior could produce passive state, and the metal that does not have passive behavior, the existence of oxygen particularly under neutrallty condition, will speed up the dissolving of anode metal.Along with the rising of temperature, the kinetic parameter of electrochemical reaction and the coefficient of diffusion of oxygen increase, but dissolved oxygen content reduces, and the rising of temperature can change the characteristic of metal surface film and metal passivation ability again.Different situations, rising temperature promptly may make the metal erosion rate reduce, and the metal erosion rate is improved.By testing the metal erosion rate that can obtain under the different temperatures.Water volume flow rate plays an important role in erosion corrosion, influences erosion corrosion mechanism.Increase corrosion and can be by increasing supply that mordant such as oxygen, carbon dioxide contacts with the metal surface or, making the diffusion and transfer increase of corrosion products such as metallic ion by reducing the thickness of surface static film.Lower flow velocity also may be owing to having stoped the mud that causes crevice corrosion or the deposition of dust and dirt to reduce corrosion.Therefore different in flow rate is different to the metal erosion influence.
To continuing to increase that ocean related industry construction drops into, make also more deep to the research of marine industries relevant device along with both at home and abroad both at home and abroad.Heat-exchange tube serious problem of erosion corrosion in equipment such as desalinization, Coastal Power Plant, naval vessel at one of marine facility visual plant, also done big quantity research both at home and abroad, some effective test methods have been proposed: 1) analogue means---at experiment lab simulation actual environment water body medium, with the powered current and the metal surface of flowing through, measure the corrosion of metal rate with gravimetric method.What this kind analogue means was commonly used is pipe stream device, and water pump is as the flow through metal surface of pipeline of powered water body, and the advantage of this method is that the simulation that pipe design, water volume flow rate, water body form is consistent with reality.2) rotating disk method---by the axle of high-speed rotation, for the rotating circular disk sample, can obtain different relative velocities at different distance place, disk tip-to-face distance center, change rotational speed and can on the disk sample, set up a series of different peripheral speeds with disk diameter, the disk sample of use same size and same rotational speed be the anti-erosion corrosion performance of metal material relatively, but require sample enough big, so that can observe critical speed range, sample can also be improved, make rotating disk electrode (r.d.e), measure the polarization curve of working electrode, calculate the corrosion of metal rate.The rotating disk electrode (r.d.e) method is obtaining application widely aspect research kinetics of electrode process and the corrosion mechanism.3) rotatingcylinder---upward sample is vertical with axle in the method, and the every bit speed on the parallel such cylinder sample with axle of this law sample is identical, by changing the axle rotational speed, can obtain a series of different peripheral speeds.Equally, also sample can be improved, make the rotating cylindrical electrode, measure the polarization curve of working electrode, calculate the metal erosion rate.At present, existing with this method research erosion corrosion behavior.4) speed is sprayed method of testing---and place the trunnion position of the mouth of pipe, the water body mouth of pipe of flowing through to wash away sample on sample, measure its rate of corrosion with gravimetric method, this method is convenient to the control and the measurement of water body speed, a plurality of parallelpipeds is installed can be measured a plurality of samples simultaneously.5) impingement flow method---fixedly sample or rotation sample are exposed under high-speed jet or the spittle impact, measure its rate of corrosion with gravimetric method.
Find that by prior art documents fourth one has just waited has summarized the research of the erosion corrosion system of liquid fixed double phase flow being carried out both at home and abroad in " erosion corrosion of metal in liquid fixed double phase flow " that " material protection " 2001,34 (11) delivered.Zheng Yugui etc. have introduced a kind of fluid-guiding type liquid-solid double-phase scouring corrosion test unit at " fluid-guiding type liquid-solid double-phase scouring corrosion test unit " 2001 among the ZL00253528.9, this device can be measured the distribution of fluid in-situ velocity fluidised form under conditions of high flow rate.Li Chengming etc. are at " device of the anticorrosive erosion property of a kind of test material " 2001, introduced the device of the anticorrosive erosion property of a kind of test material among the ZL00243391.5, it is dynamic, static or its combination that this device is suitable for tested sample, what adopt is the structure of rotating grinding board, function with a tractor serves several purposes, the erosion effect that can measure liquid-solid two-phase.
Although said apparatus can be made further understanding to washing away corrosion process, influence rule and harmfulness to erosion corrosion have been carried out test and have been inquired into, yet, yet there are no formal report at the test unit that contrasts tubing erosion corrosion performance at identical briny environment, synchronously.
The utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, a kind of seawater pipe hardware erosion corrosion test unit is provided, can be implemented in identical briny environment, contrast tubing erosion corrosion performance synchronously by this device, simultaneously the material of other shapes and specification is made and inlayed sample, also can realize the anti-erosion corrosion performance comparison research under the identical operating mode of plurality of specifications material.
The purpose of this utility model is achieved through the following technical solutions:
Sea water piping system hardware erosion corrosion test unit, comprise fluoroplastic centrifugal pump and reserve tank, characteristics are: the madial wall of described reserve tank is provided with cooling system, the import of described fluoroplastic centrifugal pump links to each other with reserve tank, the centrifugal delivery side of pump of described fluoroplastic is connected with many working lines that are in parallel on the main line, be serially connected with flow control valve, vortex shedding flow meter and work pipeline section on described every working line successively, the endpiece of described many working lines that are in parallel through circuit communication to reserve tank; The centrifugal delivery side of pump of described fluoroplastic also is provided with bypass on the main line, and bypass is communicated to reserve tank; In addition, described work pipeline section also is electrically connected with the electro-chemical test device.
Further, above-mentioned sea water piping system hardware erosion corrosion test unit, wherein, described fluoroplastic centrifugal pump is connected with motor-driven, on the described motor AC motor drive is installed, AC motor drive links to each other with the PLC controller by Programmable Logic Controller.
Further, above-mentioned sea water piping system hardware erosion corrosion test unit wherein, is equipped with the electromagnetic type fluid level controller on the described reserve tank.
Further, above-mentioned sea water piping system hardware erosion corrosion test unit, wherein, the centrifugal delivery side of pump of described fluoroplastic is equipped with tensimeter on the main line.
Again further, above-mentioned sea water piping system hardware erosion corrosion test unit, wherein, the material of described reserve tank is the UPVC material.
The substantive distinguishing features of technical solutions of the utility model and progressive being mainly reflected in:
1. the utility model device is implemented in same media, uniform temp, identical flow velocity etc. near under the on all four test condition, the anti-erosion corrosion performance test of different tubing samples;
2. the utility model is realized same material under different processing and the condition of heat treatment, anti-erosion corrosion property comparison under approaching on all four test condition such as same media, uniform temp, identical flow velocity, for selecting rational materials processing and Technology for Heating Processing that foundation is provided, effectively reduce test period and testing expenses;
3. the utility model is implemented in same media, uniform temp, identical flow velocity etc. near under the on all four test condition, the anti-erosion corrosion performance of research same material under the different medium flow conditions;
4. the utility model is realized the stepless time adjustment between a plurality of gears, increases the velocity of medium scope of each multiple operation section, is convenient to carry out more experimental studies.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: structural representation of the present utility model.
The implication of each Reference numeral sees the following form among the figure:
Embodiment
As shown in Figure 1, sea water piping system hardware erosion corrosion test unit, comprise fluoroplastic centrifugal pump 1 and reserve tank 3, the material of reserve tank 3 is the UPVC material, electromagnetic type fluid level controller 12 is installed on the reserve tank 3, the madial wall of reserve tank 3 is provided with cooling system 2, the import of fluoroplastic centrifugal pump 1 links to each other with reserve tank 3, on the centrifugal delivery side of pump of the fluoroplastic main line 5 tensimeter 4 is installed, be connected with many working lines that are in parallel 9 on the centrifugal delivery side of pump of the fluoroplastic main line 5, be serially connected with flow control valve 6 successively on every working line 9, vortex shedding flow meter 7 and work pipeline section 8, the endpiece of many working lines that are in parallel 10 are communicated to reserve tank 3 through the loop; Also be provided with bypass 11 on the centrifugal delivery side of pump of the fluoroplastic main line 5, bypass 11 is communicated to reserve tank 3.Work pipeline section 8 is electrically connected with electro-chemical test device 13.
Pipe system hardware erosion corrosion test unit adopts the UPVC plastic material of withstand voltage, antiacid alkali, anti-seawater corrosion, comprises reserve tank, main line bypass duct, elbow loose joint etc.; Cooling system 2 adopts coil arrangement, and the heat interchange that sees through between tap water and the medium reaches cooling effect.Sample work pipeline section 8 is by being threaded togather by UPVC loose joint and tested tubing the UPVC pipe of tested sample (or be inlaid with).Consider the severe corrosive of medium such as seawater, water supply pump adopts the fluoroplastic pump of the lining teflon that corrosion stability is fabulous, wearing quality is a bit weaker, and in addition, the teflon heat resistance is better, and this also is one of reason of finally selecting by the fluoroplastic pump.
The pipe system of device is divided into the two large divisions, and a part is a working line 9, is that example illustrates with five multiple operation pipelines among Fig. 1, and another part is in order to regulate the bypass 11 of rate-of flow and flow velocity; Medium is behind main line 5, and a part can flow back to reserve tank 3 by loop 10 again by flow control valve 6 and magneto-electric vortex shedding flow meter 7 to sample work pipeline section 8.
The duty of fluoroplastic centrifugal pump realizes by electric control system, electric control system mainly comprises Programmable Logic Controller, PLC controller and AC motor drive are formed, fluoroplastic centrifugal pump 1 is connected with motor-driven, AC motor drive is installed on the motor, AC motor drive links to each other with the PLC controller by Programmable Logic Controller, electric-control system all can be realized stepless speed regulation in a plurality of gears, under the constant situation of principle and functional part type, power by conversion water pump and control system also can be realized wider flow speed control, increases and decreases the gear number as required and regulates power.
During concrete the application, after measured material is installed on the performance test section, use fluoroplastic centrifugal pump 1 that the medium in the reserve tank 3 is extracted out, deliver to sample work pipeline section 8, utilize the frequency converter of electric-control system to regulate flow rates, utilize flow control valve 6 accurately to adjust again, when treating that velocity of medium in all sample active section pipelines all reaches requirement, device begins test, finishes test according to preset time.In process of the test, can utilize the electro-chemical test device to finish corresponding electrochemical parameter simultaneously and measure.Utilize electric control system to shut down after the off-test, after the active section sample is taken off, according to corresponding standard clean, weigh, analysis etc., and the anti-erosion corrosion performance of evaluating material on this basis.
The utility model is according to the needs of the anti-erosion corrosion performance of research material, design for seawater piping hardware erosion corrosion test unit, this device is mainly finished the test of two aspects, is the anti-erosion corrosion performance of same material under media environment of the same race, different in flow rate on the one hand; Be the anti-erosion corrosion performance of different materials under media environment of the same race, flow velocity of the same race on the other hand.Below by two specific embodiments the technical solution of the utility model is further described.
Embodiment 1:
Select the tubing sample of appropriate size, measure its original size, quality etc., search and calculate each used physical parameter, subsequently sample is installed on the device, begin test.In process of the test, note observing and recording medium temperature, flow velocity, reserve tank medium total amount, specimen surface state variation etc.,, need in time to replenish the reserve tank medium because of the existence of evaporation.After test period finishes, taking off sample calculates according to " preparation, cleaning and the evaluation of corrosion sample " standard cleaning, weighing, and utilize various structure property analytical instrument to analyze, the final anti-erosion corrosion data that obtain material, this example only gives illustrative with regard to yearization corrosion rate result.It is as follows to test concrete parameter:
Experiment work section tubing: admiralty brass HSn70-1
Aldubra HAl77-2
Copper-nickel alloy BFe10-1-1
Copper-nickel alloy BFe30-1-1
Xantal;
Flow velocity: 3m/s;
Time: 10 days;
Working method: continuously;
Medium: artificial seawater;
Temperature: room temperature.
Five kinds of alloy pipes in the present embodiment are tested, and detailed results sees Table 1.
Table 1
Embodiment 2:
Select the tubing sample of appropriate size, measure its original size, quality etc., search and calculate each used physical parameter, subsequently sample is installed on the device, begin test.In process of the test, note observing and recording medium temperature, flow velocity, reserve tank medium total amount, specimen surface state variation etc.,, need in time to replenish the reserve tank medium because of the existence of evaporation.After test period finishes, taking off sample calculates according to " preparation, cleaning and the evaluation of corrosion sample " standard cleaning, weighing, and utilize various structure property analytical instrument to analyze, the final anti-erosion corrosion data that obtain material, this example only give illustrative with regard to yearization corrosion speed record result.It is as follows to test concrete parameter:
Experiment work section tubing: copper-nickel alloy BFe10-1-1
Copper-nickel alloy BFe30-1-1;
Flow velocity: 2,3,4,5,6m/s;
Time: 10 days;
Working method: continuously;
Medium: artificial seawater;
Temperature: room temperature.
The erosion corrosion performance of two kinds of alloy pipes under 5 flow velocitys in the present embodiment tested, and detailed results sees Table 2.
Table 2
In sum, the utility model device is implemented in same media, uniform temp, identical flow velocity etc. near under the on all four test condition, the anti-erosion corrosion performance test of different tubing samples; Realize same material under different processing and the condition of heat treatment, anti-erosion corrosion property comparison under approaching on all four test condition such as same media, uniform temp, identical flow velocity, for selecting rational materials processing and Technology for Heating Processing that foundation is provided, effectively reduce test period and testing expenses; Be implemented in same media, uniform temp, identical flow velocity etc. near under the on all four test condition, the anti-erosion corrosion performance of research same material under the different medium flow conditions; Realize the stepless time adjustment between a plurality of gears, increase the velocity of medium scope of each multiple operation section, be convenient to carry out more experimental studies.
What need understand is: the above only is a preferred implementation of the present utility model; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. sea water piping system hardware erosion corrosion test unit, comprise fluoroplastic centrifugal pump and reserve tank, it is characterized in that: the madial wall of described reserve tank is provided with cooling system, the import of described fluoroplastic centrifugal pump links to each other with reserve tank, the centrifugal delivery side of pump of described fluoroplastic is connected with many working lines that are in parallel on the main line, be serially connected with flow control valve, vortex shedding flow meter and work pipeline section on described every working line successively, the endpiece of described many working lines that are in parallel through circuit communication to reserve tank; The centrifugal delivery side of pump of described fluoroplastic also is provided with bypass on the main line, and bypass is communicated to reserve tank; In addition, described work pipeline section also is electrically connected with the electro-chemical test device.
2. sea water piping system hardware erosion corrosion test unit according to claim 1, it is characterized in that: described fluoroplastic centrifugal pump is connected with motor-driven, on the described motor AC motor drive is installed, AC motor drive links to each other with the PLC controller by Programmable Logic Controller.
3. sea water piping system hardware erosion corrosion test unit according to claim 1 is characterized in that: the electromagnetic type fluid level controller is installed on the described reserve tank.
4. sea water piping system hardware erosion corrosion test unit according to claim 1 is characterized in that: the centrifugal delivery side of pump of described fluoroplastic is equipped with tensimeter on the main line.
5. sea water piping system hardware erosion corrosion test unit according to claim 1, it is characterized in that: the material of described reserve tank is the UPVC material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201020528693 CN201945545U (en) | 2010-09-14 | 2010-09-14 | Erosion corrosion test device for metal components in sea water piping system |
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| CN 201020528693 CN201945545U (en) | 2010-09-14 | 2010-09-14 | Erosion corrosion test device for metal components in sea water piping system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975744A (en) * | 2010-09-14 | 2011-02-16 | 苏州有色金属研究院有限公司 | Erosion corrosion test device of seawater piping system metal member |
| CN104515836A (en) * | 2014-11-03 | 2015-04-15 | 中国石油天然气集团公司 | Method and device to test anti-scaling and anti-wax precipitation properties of tubular product |
| CN108843314A (en) * | 2018-07-02 | 2018-11-20 | 中国石油大学(华东) | Experimental provision and method for the evaluation of water-producing gas well pit shaft fouling risk |
-
2010
- 2010-09-14 CN CN 201020528693 patent/CN201945545U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975744A (en) * | 2010-09-14 | 2011-02-16 | 苏州有色金属研究院有限公司 | Erosion corrosion test device of seawater piping system metal member |
| CN104515836A (en) * | 2014-11-03 | 2015-04-15 | 中国石油天然气集团公司 | Method and device to test anti-scaling and anti-wax precipitation properties of tubular product |
| CN104515836B (en) * | 2014-11-03 | 2017-04-05 | 中国石油天然气集团公司 | A kind of method and device of test tubing anti-scaling paraffin precipitation performance |
| CN108843314A (en) * | 2018-07-02 | 2018-11-20 | 中国石油大学(华东) | Experimental provision and method for the evaluation of water-producing gas well pit shaft fouling risk |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20170914 |