CN107643230A - A kind of corrosion rate test equipment under argon gas hot environment - Google Patents
A kind of corrosion rate test equipment under argon gas hot environment Download PDFInfo
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- CN107643230A CN107643230A CN201711098911.2A CN201711098911A CN107643230A CN 107643230 A CN107643230 A CN 107643230A CN 201711098911 A CN201711098911 A CN 201711098911A CN 107643230 A CN107643230 A CN 107643230A
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- flexible pipe
- triple valve
- quartz ampoule
- valve
- interface
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 30
- 239000007789 gas Substances 0.000 title claims abstract description 27
- 238000005260 corrosion Methods 0.000 title claims abstract description 22
- 230000007797 corrosion Effects 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 239000010453 quartz Substances 0.000 claims abstract description 56
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000003708 ampul Substances 0.000 claims abstract description 42
- 239000000956 alloy Substances 0.000 claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000011833 salt mixture Substances 0.000 claims description 20
- 230000005496 eutectics Effects 0.000 abstract description 14
- 238000002474 experimental method Methods 0.000 abstract description 11
- 150000003839 salts Chemical class 0.000 abstract description 10
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 239000013529 heat transfer fluid Substances 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 241001076960 Argon Species 0.000 description 1
- 229910000952 Be alloy Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 235000013876 argon Nutrition 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- -1 until the inside Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses the corrosion rate test equipment under a kind of argon gas hot environment, including big quartz ampoule, small quartz ampoule, vacuum glove box and heating furnace, the inside of the heating furnace is provided with big quartz ampoule, ring flange is installed at the top of big quartz ampoule, the inner bottom part of the big quartz ampoule is provided with small quartz ampoule, the lower end interface of triple valve is connected with another flexible pipe, the lower end of the flexible pipe is connected with pressure-reducing valve, the output end of pressure-reducing valve is connected with argon bottle, another interface of triple valve is connected with triple valve after being connected with flexible pipe, the lower end interface of triple valve is connected with flexible pipe, the upper end of the flexible pipe and ring flange connects, pressure valve is connected on ring flange, another interface of triple valve is connected with triple valve by another flexible pipe.The present invention provides a kind of vacuum experiment environment by vacuum glove box and argon bottle, and this equipment can also provide hot environment, is tested with realizing alloy sample with melting the corrosion rate of eutectic salts at high temperature.
Description
Technical field
The present invention relates to a kind of speed of the corrosion under corrosion rate test equipment technical field, more particularly to argon gas hot environment
Rate test equipment.
Background technology
Tower-type solar thermal electric power station system is to track the sun using heliostat, and by solar light focusing in central absorbent tower
On receiver, the radiation energy of focusing is changed into heat energy, heats heat-transfer fluid, driving steam turbine generator generates electricity.It is tower in theory
Heat-transfer fluid can be heated to more than 1000 DEG C by technology, but the heat-transfer fluid for being resistant to such high-temperature is not yet found.
From Carnot cycle formula, the more high then solar energy power plant efficiency of temperature of heat-transfer fluid is higher, so research both domestic and external
Person is trying to find the novel heat transfer fluid that can keep stable under more elevated operating temperature.Academic circles at present and industrial quarters are new
Operating temperature set by type high temperature heat transfer fluid is at least 700 DEG C.
Because heat-transfer fluid flowing is passed through in the tun or CSP thermo-power stations either for storing heat-transfer fluid
Pipeline used in material be all alloy, and be possible to be resistant to 700 DEG C of high temperature above heat-transfer fluid be eutectic salts mixing
Thing, salt can all have higher corrosion for alloy.So even if high temperature can be used and meet as heat-transfer fluid by finding
The eutectic salt mixture of demand, corrosivity of the mixture for different-alloy material is also studied in detail.If eutectic salts are mixed
Compound is all very high for the corrosivity of all available corrosion resistant alloys, then it does not still possess the value that engineering uses.Only simultaneously
Find a kind of high temperature eutectic salt mixture and a kind of combination of alloy so that corrosion rate energy of the mixture for this kind of alloy
Reach engine request, be possible to the eutectic salt mixture being applied to as real high temperature heat transfer fluid and built using the alloy
Among the CSP thermo-power stations made, the conversion from laboratory to engineering field is realized.At present either it is domestic still in the world for
The research of high temperature eutectic salt mixture is a lot, but still very deficient for corrosive research of the eutectic salt mixture to different-alloy
Lack.In addition, it is difficult that almost no correlated results is reported for work in document at present to create ar gas environment test in high temperature environments.This
Patent is to create the argon gas high temperature test apparatus and method of a standardization.The apparatus and method that the patent proposes are intended filling up
The research vacancy of this respect, research contents have importance and advance.The achievement in research of acquisition not only has important science
Meaning, and for promoting application of the high temperature heat transfer fluid in CSP thermo-power stations to have great practical value.
The content of the invention
The invention aims to solve shortcoming present in prior art, and under a kind of argon gas hot environment proposed
Corrosion rate test equipment.
To achieve these goals, present invention employs following technical scheme:
A kind of corrosion rate test equipment under argon gas hot environment, including big quartz ampoule, small quartz ampoule, vacuum glove box and add
Hot stove, the inside of the heating furnace are provided with big quartz ampoule, are provided with ring flange at the top of big quartz ampoule, the big quartz ampoule it is interior
Bottom is provided with small quartz ampoule, and the inside of the small quartz ampoule is filled with fused salt mixture, is provided with fused salt mixture
Alloy sample, alloy sample are located at the inside of fused salt mixture, the inner bottom part connection quartz cap of small quartz ampoule, and the one of quartz cap
End extends to the outside of ring flange and is connected with flexible pipe.Triple valve, threeway are connected with after flow rotor meter is installed on the flexible pipe
The lower end interface of valve is connected with another flexible pipe, and the lower end of the flexible pipe is connected with pressure-reducing valve, and the output end of pressure-reducing valve is connected with argon gas
Bottle, another interface of triple valve are connected with triple valve after being connected with flexible pipe, and the lower end interface of triple valve is connected with flexible pipe, and this is soft
The lower end of pipe and the upper end of ring flange connect, and are connected with pressure valve on ring flange, and another interface of triple valve passes through another soft
Pipe is connected with triple valve, and the lower end of triple valve is connected with flexible pipe, and the lower end of the flexible pipe is connected with vavuum pump, triple valve another
Interface is connected with triple valve after being connected with flexible pipe, and the upper end interface of triple valve is connected with flexible pipe, and the other end of the flexible pipe is connected to
The top of vacuum glove box, the lower end interface of triple valve are connected with another flexible pipe, and the lower end of the flexible pipe is connected with triple valve, and three
The lower end of port valve, which is connected with after flexible pipe, is connected with triple valve, and end interface is connected with another flexible pipe under triple valve, the flexible pipe it is another
One end is connected to the bottom of vacuum glove box, and another interface of triple valve is connected in the side of vacuum glove box by flexible pipe
Portion, another interface of triple valve are connected with flexible pipe, and the other end of flexible pipe is connected with pressure-reducing valve, and the other end of pressure-reducing valve passes through soft
Pipe is connected with argon bottle.
Preferably, the vavuum pump provides vacuum environment for vacuum glove box.
Preferably, flexible pipe is connected with the top of the small quartz ampoule, the upper end of flexible pipe extends to the outside of ring flange and consolidated
Fixed aerobic gas tester.
Compared with prior art, the beneficial effects of the invention are as follows:A kind of vacuum is provided by vacuum glove box and argon bottle
Experimental situation, this equipment can also provide hot environment, to realize alloy sample with melting the corrosion speed of eutectic salts at high temperature
Rate is tested.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention;
Fig. 2 is oxygen content test chart in vacuum glove box;
Oxygen content test chart in fused salt when Fig. 3 is displaced air;
Fig. 4 is oxygen concentration test chart in big quartz ampoule;
Fig. 5 is Stainless steel 316 mass loss under ar gas environment with etching time variation diagram;
Fig. 6 is Stainless steel 316 corrosion rate under ar gas environment with etching time variation diagram.
In figure:The big quartz ampoule of 1- alloy samples, 2-, the small quartz ampoules of 3-, 4- quartz caps, 5- ring flanges, 6- pressure valve, 7- argons
Gas cylinder, 8- pressure-reducing valves, 9- flow rotors meter, 10- flexible pipes, 11- triple valves, 12- vavuum pumps, 13- vacuum glove boxes, 14- electronics
Balance, 15- oxygen tester, 16- fused salt mixtures, 17- heating furnaces.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Reference picture 1-6, the corrosion rate test equipment under a kind of argon gas hot environment, including big quartz ampoule 2, small quartz ampoule
3rd, vacuum glove box 13 and heating furnace 17, the inside of heating furnace 17 are provided with big quartz ampoule 2, and the top of big quartz ampoule 2 is provided with method
Blue disk 5, the inner bottom part of big quartz ampoule 2 are provided with small quartz ampoule 3, and the inside of small quartz ampoule 3 is filled with fused salt mixture 16, melt
Melt and alloy sample 1 be provided with salt mixture 16, alloy sample 1 is located at the inside of fused salt mixture 16, small quartz ampoule 3 it is interior
Bottom connects quartz cap 4, and one end of quartz cap 4 extends to the outside of ring flange 5 and is connected with flexible pipe 10, installed on the flexible pipe 10
Triple valve 11-1 is connected with after having flow rotor meter 9, triple valve 11-1 lower end interface is connected with another flexible pipe 10, the flexible pipe 10
Lower end be connected with pressure-reducing valve 8-1, pressure-reducing valve 8-1 output end is connected with argon bottle 7-1, and another interface of triple valve 11-1 connects
Triple valve 11-2 is connected with after being connected to flexible pipe 10, triple valve 11-2 lower end interface is connected with flexible pipe 10, and under the flexible pipe 10
End is connected with the upper end of ring flange 5, is connected with pressure valve 6 on ring flange 5, and triple valve 11-2 another interface passes through another soft
Pipe 10 is connected with triple valve 11-3, and triple valve 11-3 lower end is connected with flexible pipe 10, and the lower end of the flexible pipe 10 is connected with vavuum pump
12, triple valve 11-3 another interface are connected with triple valve 11-4, triple valve 11-4 upper end interface after being connected with flexible pipe 10
Flexible pipe 10 is connected with, the other end of the flexible pipe 10 is connected to the top of vacuum glove box 13, and triple valve 11-4 lower end interface connects
Another flexible pipe 10 is connected to, the lower end of the flexible pipe 10 is connected with triple valve 11-5, and triple valve 11-5 lower end is connected with flexible pipe 10
After be connected with triple valve 11-6, end interface is connected with another flexible pipe 10, the other end connection of the flexible pipe 10 under triple valve 11-6
In the bottom of vacuum glove box 13, triple valve 11-5 another interface is connected to the side of vacuum glove box 13 by flexible pipe 10
Middle part, triple valve 11-6 another interface are connected with flexible pipe 10, and the other end of flexible pipe 10 is connected with pressure-reducing valve 8-2, pressure-reducing valve
The 8-2 other end is connected with argon bottle 7-2 by flexible pipe 10, and the inner bottom part of vacuum glove box 13 is provided with electronic balance 14, very
Empty pump 12 is that vacuum glove box 13 provides vacuum environment, and small quartz ampoule 3 is connected with quartz cap 4, is terminated with quartz cap 4 soft
Pipe 10, flexible pipe 10 are connected with oxygen tester 15.
In the present invention, the corrosion rate test equipment under a kind of argon gas hot environment, including big quartz ampoule 2, small quartz ampoule
3rd, vacuum glove box 13 and heating furnace 17 etc.;Vavuum pump 12 is opened, by triple valve 11-3 and 11-4, vacuum glove box 13 is taken out
Into vacuum, argon bottle 7-2 and pressure-reducing valve 8-2 is then opened, vacuum glove box 13 is full of by argon gas by triple valve 11-6.Continue
The above-mentioned operation for vacuumizing and leading to argon gas, until the inside, oxygen concentration, which is reduced to, meets requirement of experiment, oxygen in vacuum glove box 13
Gas content is as shown in Figure 2;Then alloy sample and the eutectic salts prepared according to certain ratio are mixed in vacuum glove box 13
Compound is put into small quartz ampoule 3;Wherein electronic balance 14 is used for the quality for weighing salt;Then, small quartz ampoule 3 is put into big quartz
In pipe 2, experiment is exhausted.First heating furnace 17 is heated to melt eutectic salts melt temperature(30-50 DEG C of its fusing point need to be more than),
Then argon bottle 7-1 and pressure-reducing valve 8-1 is opened, is continued by triple valve 11-1, flow rotor meter 9 and quartz cap 4 air inlet
Argon gas is passed through in melting eutectic salt mixture 16 into small quartz ampoule 3 30 minutes, will be contained originally in fused salt mixture 16
Moisture and oxygen discharge, the exhaust outlet of quartz cap 4 goes out to be placed with oxygen tester 15, and specific oxygen content is shown in Fig. 3;Then, beat
Vavuum pump 12 is driven, by triple valve 11-3,11-2 and pressure valve 6, big quartz ampoule is evacuated, then opens argon bottle 7-1
With pressure-reducing valve 8-1, by triple valve 11-1,11-2 and pressure valve 6, big quartz ampoule is full of argon gas.Continue it is above-mentioned vacuumize it is logical
Argon gas operates, until meeting requirement of experiment;Oxygen content in big quartz ampoule is as shown in Figure 4;Finally, ring flange 5 is covered, will be added
Hot stove 17 is set to experiment demand high temperature(This experiment is set as 700 DEG C).
Gravimetric method experiment calculates corruption by the mass loss of alloy sample after the set time at high temperature by measuring
Lose speed.Mass loss for after the quality of the clean sample before experiment and experiment by the difference for the quality of sample suitably cleaned
Value.Also need to know the time of the density of surveyed alloy, the surface area of sample and Therapy lasted before being calculated.Corrosion speed
The calculation formula of rate is formula:
Wherein CR is corrosion rate, and unit is μm/year.For mass loss, unit g.ρ is the density of institute's beta alloy, single
Position is g/cm3.A be alloy sample surface area, unit cm2.T is test duration, and unit is day.
Will before alloy sample is weighed being taken out before alloy sample is put into eutectic salt mixture and after experiment
Alloy sample is cleaned according to U.S.ASTM standard.It is as follows to the cleaning step of the alloy sample before testing:
Wash away specimen surface using deionized water and acetone successively first, treat after dry tack free again successively using 600 mesh and
1200 mesh SiC sand paper polish to surface, reuse deionized water afterwards and acetone cleans to specimen surface.To reality
The cleaning step tested before the alloy sample taken out afterwards is weighed is as follows:Sample is put into the burning equipped with deionized water first
Cleaned 15 minutes in supersonic cleaning machine in cup, then sample is put into the beaker equipped with 5.55 wt.% concentration dilute hydrochloric acid solutions
Cleaned 15 minutes in supersonic cleaning machine, repeat the first step, washed away the alloy that sample cleaned using acetone afterwards and try
Sample.
Fig. 5 is shown under ar gas environment, during 700 DEG C of high temperature, the quality after Stainless steel 316 and the reaction of chlorination salt mixture
Loss.
Fig. 6 is shown under ar gas environment, during 700 DEG C of high temperature, the corrosion after Stainless steel 316 and the reaction of chlorination salt mixture
Speed.
The beneficial effects of the present invention are provide a kind of vacuum experiment environment, this equipment by vacuum glove box and argon bottle
Hot environment can also be provided, tested with realizing alloy sample with melting the corrosion rate of eutectic salts at high temperature.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (3)
1. the corrosion rate test equipment under a kind of argon gas hot environment, including big quartz ampoule(2), small quartz ampoule(3), vacuum hand
Casing(13)And heating furnace(17), it is characterised in that the heating furnace(17)Inside be provided with big quartz ampoule(2), big quartz ampoule
(2)Top ring flange is installed(5), the big quartz ampoule(2)Inner bottom part small quartz ampoule is installed(3), the small quartz
Pipe(3)Inside be filled with fused salt mixture(16), fused salt mixture(16)Inside it is provided with alloy sample(1), alloy examination
Sample(1)Positioned at fused salt mixture(16)Inside, small quartz ampoule(3)Inner bottom part connection quartz cap(4), quartz cap(4)'s
One end extends to ring flange(5)Outside and and flexible pipe(10)Connection, the flexible pipe(10)On flow rotor meter is installed(9)After connect
It is connected to triple valve(11-1), triple valve(11-1)Lower end interface be connected with another flexible pipe(10), the flexible pipe(10)Lower end connect
It is connected to pressure-reducing valve(8-1), pressure-reducing valve(8-1)Output end be connected with argon bottle(7-1), triple valve(11-1)Another interface connects
It is connected to flexible pipe(10)After be connected with triple valve(11-2), triple valve(11-2)Lower end interface be connected with flexible pipe(10), and this is soft
Pipe(10)Lower end and ring flange(5)Upper end connection, ring flange(5)On be connected with pressure valve(6), triple valve(11-2)It is another
One interface passes through another flexible pipe(10)It is connected with triple valve(11-3), triple valve(11-3)Lower end be connected with flexible pipe(10),
The flexible pipe(10)Lower end be connected with vavuum pump(12), triple valve(11-3)Another interface be connected with flexible pipe(10)After connect
There is triple valve(11-4), triple valve(11-4)Upper end interface be connected with flexible pipe(10), the flexible pipe(10)The other end be connected to
Vacuum glove box(13)Top, triple valve(11-4)Lower end interface be connected with another flexible pipe(10), the flexible pipe(10)'s
Lower end is connected with triple valve(11-5), triple valve(11-5)Lower end be connected with flexible pipe(10)After be connected with triple valve(11-6),
Triple valve(11-6)Lower end interface is connected with another flexible pipe(10), the flexible pipe(10)The other end be connected to vacuum glove box
(13)Bottom, triple valve(11-5)Another interface pass through flexible pipe(10)It is connected to vacuum glove box(13)Side in
Portion, triple valve(11-6)Another interface be connected with flexible pipe(10), flexible pipe(10)The other end be connected with pressure-reducing valve(8-2),
Pressure-reducing valve(8-2)The other end pass through flexible pipe(10)It is connected with argon bottle(7-2).
2. the corrosion rate test equipment under a kind of argon gas hot environment according to claim 1, it is characterised in that described
Vavuum pump(12)For vacuum glove box(13)Vacuum environment is provided.
3. the corrosion rate test equipment under a kind of argon gas hot environment according to claim 1, it is characterised in that described
Small quartz ampoule(3)Top be connected with flexible pipe(10), flexible pipe(10)Upper end extend to ring flange(5)Outside and fixation it is aerobic
Gas tester(15).
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CN108801895A (en) * | 2018-08-02 | 2018-11-13 | 华北水利水电大学 | A kind of fluent metal loop corrosion experiment glove box |
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