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 PDF

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Publication number
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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China
Prior art keywords
flexible pipe
triple valve
quartz ampoule
valve
interface
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CN201711098911.2A
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Chinese (zh)
Inventor
徐心海
刘天乐
董军
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Shenzhen Graduate School Harbin Institute of Technology
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Shenzhen Graduate School Harbin Institute of Technology
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Priority to CN201711098911.2A priority Critical patent/CN107643230A/en
Publication of CN107643230A publication Critical patent/CN107643230A/en
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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

A kind of corrosion rate test equipment under argon gas hot environment
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).
CN201711098911.2A 2017-11-09 2017-11-09 A kind of corrosion rate test equipment under argon gas hot environment Pending CN107643230A (en)

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