CN209945956U - Corrosion life test equipment for corrosion-resistant material - Google Patents
Corrosion life test equipment for corrosion-resistant material Download PDFInfo
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- CN209945956U CN209945956U CN201822122382.1U CN201822122382U CN209945956U CN 209945956 U CN209945956 U CN 209945956U CN 201822122382 U CN201822122382 U CN 201822122382U CN 209945956 U CN209945956 U CN 209945956U
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Abstract
The utility model relates to a test equipment for corrosion life of corrosion resistant materials, which comprises a cup body, a sealed cup cover component, a stirring component and a temperature control unit, wherein the cup body comprises an outer cup body and an inner cup body which is sleeved in the outer cup body and forms an annular gap with the outer cup body; the sealing cup cover assembly comprises a cup cover matched with the outer cup body, a ceramic heat insulation gasket, a sealing diaphragm and a diaphragm retainer ring; the stirring assembly comprises a motor, a stirring piece and a stirring shaft connected with the motor and the stirring piece, and the stirring shaft penetrates through the cup cover, the sealing diaphragm and the diaphragm retainer ring to extend so that the stirring piece is positioned in the inner cup body; the temperature control unit comprises a thermocouple and an electric heating wire which are coupled; the utility model discloses equipment overall design is simple, can prevent effectively that sour gas is excessive, thermal-insulated heat preservation, the utility model discloses can be used for effectively the aassessment of the corrosion rate and the service life of equipment material.
Description
Technical Field
The utility model relates to a material high temperature corrosion resistance measures the field, in particular to corrosion-resistant material corrosion life's that equipment adopted in one-step acid-soluble method test equipment.
Background
In the process flow of the one-step acid dissolution method, the working conditions of related chemical equipment (such as a dissolution tank, a process pipeline, an evaporator, an acid absorption tower, a settling tank and the like) are harsh: the working temperature is high (between 120 and 180 ℃); the dissolved slurry is in a non-oxidizing strong acid-hydrochloric acid condition, and a large amount of solid particles are accompanied, under the action of mechanical force, a certain erosion and abrasion effect is exerted on the material of the equipment, so that the material of the equipment in the contact part with the slurry solution is selected, most of the materials are inorganic non-metallic materials with strong high-temperature corrosion resistance, such as polytetrafluoroethylene, silicon carbide, glass fiber reinforced plastics, graphite and the like, the corrosion rate of the materials cannot be evaluated in a conventional electrochemical mode for measuring the gain and loss of metal electrons, and meanwhile, because the working condition of the test is harsh, a general high-temperature high-pressure reaction kettle cannot perform a whole-course simulation test according to the actual working condition, so that the service corrosion life of the chemical equipment cannot be accurately evaluated. In the whole process flow, the tolerance of the material and the service corrosion life of chemical equipment are related to the feasibility of the whole process flow, so the corrosion life evaluation is very important for the significance of the one-step acid dissolution method.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a corrosion-resistant material corrosion life's test equipment for the service corrosion life to equipment material evaluates in the one-step acid-soluble method.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
a test device for corrosion life of corrosion-resistant materials comprises a cup body, a sealing cup cover assembly, a stirring assembly and a temperature control unit,
the cup body comprises an outer cup body and an inner cup body which is sleeved in the outer cup body and forms an annular gap with the outer cup body;
the sealing cup cover assembly comprises a cup cover matched with the outer cup body, a ceramic heat insulation gasket, a sealing diaphragm and a diaphragm retainer ring, the ceramic heat insulation gasket is annular, an annular bulge matched with the annular gap is arranged on the lower end face of the ceramic heat insulation gasket, and the ceramic gasket is arranged between the cup cover and the outer cup body and is used for being matched with the cup cover to seal the outer cup body; a circular bulge is arranged at the lower end of the cup cover, matched threads are arranged on the side wall of the circular bulge and the upper end of the inner wall of the inner cup body, and the sealing diaphragm and the diaphragm retainer ring are sequentially attached to the lower surface of the circular bulge of the cup cover from top to bottom and used for protecting the lower surface of the circular bulge;
the stirring assembly comprises a motor, a stirring piece and a stirring shaft connected with the motor and the stirring piece, and the stirring shaft penetrates through the cup cover, the sealing diaphragm and the diaphragm retainer ring to extend so that the stirring piece is positioned in the inner cup body;
the temperature control unit comprises a thermocouple and a heating wire which are arranged in a coupling mode, the thermocouple penetrates through the cup cover and extends into the inner cup body to monitor the temperature in the inner cup body, and the heating wire is wound on the outer wall of the inner cup body to heat materials in the inner cup body.
According to the utility model discloses a test equipment, preferably, the stirring piece includes stirring paddle and the lantern ring, the stirring paddle is processed into square frame stirring rake, the inboard of square frame stirring rake is equipped with the recess, is used for imbedding the sample to be measured in the square frame; the lantern ring is sleeved outside the square frame and used for fixing the embedded sample to be tested to the square frame type stirring paddle. Preferably, the stirring shaft material is a titanium alloy material, more preferably TC 10; the stirring paddle material is polytetrafluoroethylene, and the lantern ring is Hastelloy B.
According to the utility model discloses a test equipment, preferably, processing has the spiral recess on the outer wall of interior cup, the heating wire is followed spiral recess winding extremely on the outer wall of interior cup. The utility model discloses in, the coupling setting of thermocouple and heating wire in the control by temperature change unit means the heating power of heating wire can carry out the feedback condition according to the monitoring temperature of thermocouple to with the temperature control in the interior cup in the within range that needs, concrete setting between the two is well-known in the field, and it is no longer repeated here.
According to the testing device of the utility model, preferably, the inner cup body is a corundum ceramic cup body with an inner wall coated with an epoxy resin coating;
the outer cup body comprises a silicon carbide inner layer, a stainless steel outer layer and an intermediate adhesive layer for bonding the silicon carbide inner layer and the stainless steel outer layer; preferably, the adhesive layer is silicone rubber.
According to the utility model discloses a test equipment, preferably, the motor is miniature rotating electrical machines, is fixed in on the bowl cover.
According to the testing device of the utility model, preferably, the cup cover, the sealing diaphragm and the diaphragm retainer ring, and the cup cover and the ceramic heat insulation gasket are bonded together by epoxy resin; preferably, the ceramic heat insulation gasket is made of alumina ceramic, wherein the content of alumina is not less than 96 wt%, and the sealing diaphragm and the diaphragm retainer ring are made of chloroprene rubber and polytetrafluoroethylene respectively; the cup cover is made of stainless steel materials, and 1Cr18Ni9Ti materials are preferably selected;
according to the testing device of the utility model, preferably, an annular cylindrical graphite pipe is arranged in an annular gap formed between the cup cover, the sealing diaphragm, the heat insulation gasket and the stirring shaft; preferably, the outer wall of the graphite pipe is coated with an epoxy resin layer so as to form a self-lubricating sealing structure with the sealing diaphragm and the heat insulation gasket. The ceramic heat-insulating gasket, the sealing diaphragm, the diaphragm retainer ring and the graphite pipe are matched to effectively play a role in preventing the acid volatile gas from overflowing.
The test equipment of the present invention is typically useful for the testing of corrosion life of corrosion resistant materials for devices used in one-step acid dissolution methods, wherein, with the above test equipment, a sample is fixed to the stirring chamber to be tested under acidic conditions; calculating the corrosion rate of the sample under the working condition by measuring the mass change of the sample before and after the sample, thereby obtaining the service corrosion life of the corrosion-resistant material; wherein the content of the first and second substances,
the corrosion rate is calculated according to equation (1):
wherein v is the corrosion rate, and the unit is mm/h; w0-initial weight in g;
W1-Final weight in g; rho-density in g/cm3；
S-surface area in mm2(ii) a h-test time in hours.
The corrosion life is calculated according to the formula (2)
f＝D/v (2)
Wherein: f-corrosion life; d-allowable margin of corrosion of material
The process for extracting alumina from fly ash by the "one-step acid dissolution method" can be found in patent document CN102145905A, which is incorporated by reference in the present application. Specifically, the preparation method of the white mud can comprise the following steps:
1) magnetic separation and iron removal of the fly ash, namely crushing the fly ash to be below 100 meshes, adding water to prepare slurry with the solid content of 20-40 wt%, and carrying out magnetic separation on a vertical ring type magnetic separator, wherein the magnetic separation field strength is 1.0-2.0 ten thousand GS; carrying out solid-liquid separation on the slurry subjected to magnetic separation to obtain a filter cake with the solid content of 25-50 wt%;
2) acid dissolution, namely placing the filter cake after magnetic separation in an acid-proof reaction kettle for hydrochloric acid dissolution, wherein the concentration of hydrochloric acid is 20-30 wt%, the molar ratio of HCl in hydrochloric acid to alumina in fly ash is 4.5:1-9:1, and the dissolution temperature is 120-150 ℃; and (4) carrying out solid-liquid separation and drying on the product after acid dissolution to obtain the white mud.
During testing, slurry for submerging the stirring piece is filled in the inner cup body, the slurry consists of hydrochloric acid solution with the concentration of 20-30 wt%, such as 22 wt%, 25 wt% or 28 wt% and fly ash, and the content of the fly ash in the slurry is 200-300g/L, such as 220g/L, 250g/L or 280 g/L; the stirring speed is 1-2 r/s; the test temperature may be substantially the same as the dissolution temperature range described above, such as 120 ℃ to 160 ℃, such as 130, 140 or 150 ℃.
The utility model discloses following beneficial effect has:
the utility model discloses a screw thread swivelling joint structure of bowl cover and cup, it can play isolated inside sour gas outwards elegant under the effect of diaphragm and retaining ring, guarantees to measure the accurate effect of index of operating mode, can rely on the connection between the screw thread again, bears because the temperature risees the interior pressure rising problem of bringing, ensures the safety of experiment.
2 the utility model discloses a titanium alloy material (TC10) has guaranteed to the at utmost that the rotating equipment is required torsional rigidity when twisting as the (mixing) shaft material, makes the degree of corrosion of operating mode environment to the material reach the minimum again simultaneously.
3 the stirring paddle of the utility model adopts a frame structure, which is convenient for the embedding and installation of samples, and simultaneously adopts a stainless steel lantern ring for fixing, thereby increasing the overall rigidity of the stirring paddle and being beneficial to the stirring experiment; in addition, the polytetrafluoroethylene is used as a stirring paddle material, so that the environment corrosion can be resisted, and the processing difficulty and the cost of the stirring paddle material are greatly reduced.
4 the utility model discloses a (mixing) shaft adopts the screw thread form to be connected with the stirring rake, makes the stirring rake after experimental at every turn dismantle with change more convenient, guarantees the reliability of being connected of stirring rake and (mixing) shaft simultaneously.
The corundum ceramic material is adopted as the material of the inner cup body, so that on one hand, the acid corrosion resistance of the experimental part of the cup body is enhanced; meanwhile, because the temperature resistance and the forming processing type are good, the thermal stability is higher, the thread can be directly processed to wind the resistance wire, the integral design is simple, and the miniaturization processing is easy.
The utility model discloses use high temperature resistant corrosion-resistant epoxy resin binder as the coating material of cup inner wall, can prevent slurry solution to ceramic material's micro-infiltration under the high temperature condition, can alleviate the solid-state granule in the slurry solution again and erode the abrasive action to ceramic inner wall position to at every turn after experimental, can carry out local clearance and repair, the life of extension equipment according to the thickness of coating and the wearing and tearing condition that appears.
The utility model discloses a prevent that the leakage of acid gas volatilizees when the (mixing) shaft rotates, insert the annular column graphite pipe packing in the annular gap space that bowl cover, diaphragm retaining ring and thermal-insulated gasket and stirring shaft formed, it is sealed between (mixing) shaft and gasket to carry out through graphite material's solid-state self-lubricity and temperature resistant anticorrosive nature, has effectively prevented volatilizing of acid gas.
8 the utility model discloses a silicon carbide material makes the heat transfer effect greatly reduced between the cup inside and the cup outside as cup external thermal insulation material, has strengthened the thermal insulation performance of equipment.
The utility model discloses a silicon carbide barrel and stainless steel shell are filled to rubber materials, both play thermal-insulated heat retaining effect, can alleviate the thermal stress problem that brings because of two kinds of materials that the thermal expansion coefficient differs greatly again.
Drawings
Fig. 1 is a schematic structural diagram of the testing apparatus of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. As shown in fig. 1, in one embodiment, the testing device of the present invention comprises a cup body, a sealing cup cover assembly, a stirring assembly and a temperature control unit, wherein the cup body comprises an outer cup body 1 and an inner cup body 2 which is sleeved in the outer cup body 1 and forms an annular gap with the outer cup body; the sealing cup cover assembly comprises a cup cover 3 matched with the outer cup body 1, a ceramic heat insulation gasket 4, a sealing diaphragm 5 and a diaphragm retainer ring 6, the ceramic heat insulation gasket 4 is annular, an annular bulge matched with the annular gap is arranged on the lower end face of the ceramic heat insulation gasket 4, and the ceramic gasket 4 is arranged between the cup cover 3 and the outer cup body 1 and is used for being matched with the cup cover 3 to seal the outer cup body 1; a circular bulge is arranged at the lower end of the cup cover 3, the side wall of the circular bulge and the upper end of the inner wall of the inner cup body 2 are provided with matched threads, and the sealing diaphragm 5 and the diaphragm retainer ring 6 are sequentially attached to the lower surface of the circular bulge of the cup cover 3 from top to bottom and used for protecting the lower surface of the circular bulge; the stirring assembly comprises a motor 7, a stirring piece 9 and a stirring shaft 8 for connecting the motor 7 and the stirring piece 9, and the stirring shaft 8 passes through the cup cover 3, the sealing diaphragm 5 and the diaphragm retainer ring 6 to extend so that the stirring piece 9 is positioned in the inner cup body 2; the temperature control unit 10 comprises a thermocouple 101 and a heating wire 102 which are coupled, the thermocouple 101 penetrates through the cup cover 3 and extends into the inner cup body 2 to monitor the temperature in the inner cup body 2, and the heating wire 102 is wound on the outer wall of the inner cup body 2 to heat the material in the inner cup body 2. The coupling arrangement of the thermocouple 101 and the heating wire 102 in the temperature control unit 10 means that the heating power of the heating wire 102 can be fed back according to the monitored temperature of the thermocouple 101, so as to control the temperature in the inner cup body 2 within a required range, and the specific arrangement between the two is well known in the art and is not described herein again.
In one embodiment, the stirring member 9 comprises a stirring paddle 91 and a sleeve ring 92, the stirring paddle 91 is processed into a square stirring paddle, and the inner side of the square stirring paddle is provided with a groove for embedding the sample to be tested into the square; the lantern ring 92 is sleeved outside the square frame and used for fixing the embedded sample to be tested to the square frame type stirring paddle 91. The stirring shaft 8 is made of a titanium alloy material, and TC10 is more preferable; the stirring paddle 91 is made of polytetrafluoroethylene, and the lantern ring 92 is made of hastelloy B.
In one embodiment, a spiral groove is formed on the outer wall of the inner cup body 2, and the heating wire 102 is wound on the outer wall of the inner cup body 2 along the spiral groove. The inner cup body 2 is a corundum ceramic cup body, and the inner wall of the inner cup body is coated with an epoxy resin coating 21; the outer cup body 1 comprises a silicon carbide inner layer 11, a stainless steel outer layer 12 and an intermediate adhesive layer for bonding the silicon carbide inner layer 11 and the stainless steel outer layer 12; preferably, the adhesive layer is silicone rubber; the lower end of the outer cup body 1 is provided with a base 13. The cup cover 3 is made of stainless steel materials, and 1Cr18Ni9Ti materials are preferably selected; the motor 7 is a miniature rotating motor and is fixed on the cup cover 3.
In one embodiment, the cup cover 3, the sealing diaphragm 5 and the diaphragm retainer ring 6, and the cup cover 3 and the ceramic heat insulation gasket 4 are bonded together through epoxy resin; preferably, the ceramic heat insulation gasket 4 is made of alumina ceramic, wherein the content of alumina is not less than 96 wt%, and the sealing diaphragm 5 and the diaphragm retainer ring 6 are made of neoprene and polytetrafluoroethylene respectively. An annular cylindrical graphite pipe is arranged in an annular gap formed among the cup cover 3, the sealing diaphragm 5, the heat insulation gasket 6 and the stirring shaft 8; preferably, the outer wall of the graphite pipe is coated with epoxy resin material to form a self-lubricating sealing structure with the sealing diaphragm and the heat insulation gasket. The cup cover, the ceramic heat insulation gasket, the sealing diaphragm, the diaphragm retainer ring and the graphite pipe are matched to effectively play a role in sealing the overflow of the acid volatile gas.
The invention is further described below in connection with an embodiment of a test using the above-described test apparatus.
Test equipment
As shown in figure 1, the cup cover 3 (phi 20 multiplied by 2cm) is made of stainless steel, specifically 1Cr18Ni9Ti material, the upper part of the cup cover 3 is fixed with a micro rotating motor 7(90ZYT52 permanent magnet DC motor), the circular convex side wall (phi 10 multiplied by 5cm) at the lower end of the cup cover 3 is provided with screw threads, and is connected and sealed with the screw thread part (phi 10 multiplied by 5cm) at the upper part of the inner wall of the inner cup body 2 by screw thread rotation. The thermocouple 101 is a corrosion-resistant platinum rhodium alloy thermocouple, the specific model is WPR14F, the thermocouple is installed at the position 1/4R close to the circle center of the cup cover 3, the testing end is inserted into the testing slurry solution inside the inner cup body 2, and the outer end of the thermocouple is connected with a thermocouple sensor of the temperature control unit 10. The ceramic heat insulation gasket 4 is of an annular multilayer structure (in an upper layer annular structure, an inner ring is phi 10cm, an outer ring is phi 20cm and the thickness is 1cm, in a lower layer annular bulge, an inner ring is phi 12cm, an outer ring is phi 15cm and the thickness is 4cm), the annular bulge part of the lower layer is used for carrying out heat insulation sealing on the top end part of an annular gap, and the material is 96% of alumina ceramic. The sealing diaphragm 5 (outer ring: phi 10cm inner ring: phi 1.5cm thickness: 0.5cm) and the diaphragm check ring 6 (outer ring: phi 10cm inner ring: phi 2cm thickness: 0.5cm) play a sealing role of blocking the overflow of the acid volatile gas, the materials are respectively chloroprene rubber and polytetrafluoroethylene materials, an annular gap formed by the chloroprene rubber and the polytetrafluoroethylene materials and the stirring shaft 8 is filled by an annular columnar graphite pipe, the wall thickness of the pipe is 1cm, the height of the pipe is 1cm, and the outer wall of the graphite pipe is bonded with the inner walls of the sealing diaphragm 5 and the diaphragm check ring 6 by adopting a high-temperature-resistant epoxy resin material. The stirring shaft 8 (phi 1 multiplied by 15cm) is made of titanium alloy TC10 material, the upper end is connected with the micro motor 7, the lower end port is provided with external threads, the port of the stirring paddle 91 connected with the stirring shaft is provided with internal threads, and the two are combined through a thread structure. The stirring paddle 91 is made of high-density polytetrafluoroethylene material and is processed into a frame type stirring paddle (5 multiplied by 5cm), a test sample is processed into a groove (4.5 multiplied by 4.5cm) which can be embedded into a square structure formed by the outer edge of the stirring paddle 91, and the stirring paddle 91 and the sample are fixed by an outer sleeve Hastelloy B lantern ring 92.
The outer cup body 1 (phi 20 multiplied by 30cm) arranged on the base 13 comprises a silicon carbide inner layer 11 and a stainless steel outer layer 12, the silicon carbide inner layer 11 is processed into a cylindrical shape (phi 19 multiplied by 25 wall thickness 3), the stainless steel outer layer cylinder body (phi 20 multiplied by 25cm wall thickness 2cm) is sleeved outside, gaps can be bonded and packaged through silicon rubber material adhesive, and the whole body is used as a heat insulation material and a shell of the cup body. The ceramic material of the inner cup body 2 (phi 12 is multiplied by 25cm, the wall thickness is 2cm) is corundum alumina ceramic material, the outer wall of the inner cup body is processed with a spiral groove, a Ni-Cr spiral heating wire 102 is wound on the spiral groove, and two ends of the heating wire 102 are connected with a switch module of the temperature control unit. The inner wall of the ceramic material of the inner cup body is coated with a high-temperature-resistant and corrosion-resistant epoxy resin coating 21, the coating thickness is 2-3 mm, the coating height is below the thread (downwards 5cm from the cup rim) of the inner wall of the ceramic, after each test experiment is finished, whether the coating is lost or not is checked, and the damaged and abraded part can be re-coated with epoxy resin.
Measuring the corrosion life of the equipment material by the one-step acid dissolution method, wherein the test condition 1 is as follows: HCl content 25%, solid content (fly ash) 250g/L, temperature 120 ℃. The sample was mounted on a paddle and continuously rotated in a cup at 2 rpm for 10 days.
The test item is that the corrosion rate of the sample under the working condition is calculated according to the calculation formula (1) of the corrosion rate by measuring the mass change of the sample before and after the sample, and the service life of the material is further calculated.
The formula:
wherein v is the corrosion rate, and the unit is mm/h; w0-initial weight in g;
W1-Final weight in g; rho-density in g/cm 3;
s-surface area, in mm 2; h-test time in hours
The corrosion life is calculated according to the formula (2)
f＝D/v (2)
Wherein: f-corrosion life; d-allowable margin of corrosion of material
Examples 1 to 3
(1) 3 samples (4.5X 4.5cm) were cut from the cavity material of the ceramic valve at the bottom outlet of the acid-soluble autoclave.
(2) The samples are marked and washed by distilled water and ethanol, dried in an oven at the constant temperature of 60 ℃ for 24 hours, and then weighed to record the initial weight of the parallel samples No. 1, 2 and 3.
(3) The No. 1, No. 2 and No. 3 parallel samples are fixed on a stirring paddle through a Hastelloy B lantern ring.
(4) The test vessel was filled with the test slurry and tested according to test conditions 1, 2 and 3, respectively.
(5) And stopping the test after the test is finished, taking down the test sample, cleaning the test sample by using distilled water and ethanol respectively, drying the test sample in an oven at the constant temperature of 60 ℃ for 24 hours, weighing, and recording the final weights of the parallel samples No. 1, 2 and 3.
The corrosive wear rate was obtained by the calculation formula of the corrosion rate shown in Table 6.
TABLE 6 Corrosion Life data for valve ceramic materials
In order to prevent the valve from corrosion leakage, the allowable value of the corrosion allowance inside the valve cavity is less than or equal to 1.5mm, and the average service life of the valve cavity can be estimated to be about 10.5 years according to the measurement data and the corrosion life formula (2).
In actual operation, Shenhua energy standard is applied to a dissolution reaction kettle for extracting aluminum from fly ash by a one-step acid dissolution method, and the perennial operating conditions of the dissolution reaction kettle are basically as follows: the concentration of hydrochloric acid is 20-30 wt%, the molar ratio of HCl in the hydrochloric acid to alumina in the fly ash is 4.5:1-9:1, and the dissolution temperature is 120-150 ℃;
when the ceramic valve newly replaced at the bottom outlet is in a working state and operated for 3 years, and is overhauled and disassembled, the depth of the most serious inner corrosion part is about 0.435mm, so that the average corrosion wear rate V of the ceramic valve is about 0.145, which is the same as the average corrosion wear rate V obtained by the embodimentFlat plateThe difference does not exceed ± 10% of the average erosive wear rate V. Therefore, the test equipment of the utility model has better reliability on the estimation of the corrosion life of the corrosion-resistant material of the device used in the one-step acid dissolution method.
Claims (8)
1. A test device for corrosion life of corrosion-resistant materials is characterized by comprising a cup body, a sealing cup cover assembly, a stirring assembly and a temperature control unit, wherein,
the cup body comprises an outer cup body and an inner cup body which is sleeved in the outer cup body and forms an annular gap with the outer cup body;
the sealing cup cover assembly comprises a cup cover matched with the outer cup body, a ceramic heat insulation gasket, a sealing diaphragm and a diaphragm retainer ring, the ceramic heat insulation gasket is annular, an annular bulge matched with the annular gap is arranged on the lower end face of the ceramic heat insulation gasket, and the ceramic heat insulation gasket is arranged between the cup cover and the outer cup body and is used for being matched with the cup cover to seal the outer cup body; a circular bulge is arranged at the lower end of the cup cover, matched threads are arranged on the side wall of the circular bulge and the upper end of the inner wall of the inner cup body, and the sealing diaphragm and the diaphragm retainer ring are sequentially attached to the lower surface of the circular bulge of the cup cover from top to bottom and used for protecting the lower surface of the circular bulge;
the stirring assembly comprises a motor, a stirring piece and a stirring shaft connected with the motor and the stirring piece, and the stirring shaft penetrates through the cup cover, the sealing diaphragm and the diaphragm retainer ring to extend so that the stirring piece is positioned in the inner cup body;
the temperature control unit comprises a thermocouple and a heating wire which are arranged in a coupling mode, the thermocouple penetrates through the cup cover and extends into the inner cup body to monitor the temperature in the inner cup body, and the heating wire is wound on the outer wall of the inner cup body to heat materials in the inner cup body.
2. The test equipment as claimed in claim 1, wherein the stirring member comprises a stirring paddle and a collar, the stirring paddle is processed into a square stirring paddle, and the inner side of the square frame of the square stirring paddle is provided with a groove for embedding the sample to be tested into the square frame; the lantern ring is sleeved outside the square frame and used for fixing the embedded sample to be tested to the square frame type stirring paddle.
3. The test apparatus according to claim 1 or 2, wherein a spiral groove is formed on an outer wall of the inner cup body, and the heating wire is wound on the outer wall of the inner cup body along the spiral groove.
4. The test apparatus of claim 3, wherein the inner cup is a corundum ceramic cup with an epoxy coating on an inner wall;
the outer cup body comprises a silicon carbide inner layer, a stainless steel outer layer and an intermediate adhesive layer for bonding the silicon carbide inner layer and the stainless steel outer layer.
5. The test apparatus of claim 4, wherein the motor is a micro-rotating motor secured to the cup.
6. The test apparatus of claim 5, wherein the cup cover, the sealing diaphragm and the diaphragm retainer ring, and the cup cover and the ceramic heat insulating gasket are bonded together by epoxy resin.
7. The test apparatus as claimed in claim 6, wherein an annular cylindrical graphite tube is arranged in an annular gap formed between the cup cover, the sealing diaphragm and the heat insulating gasket and the stirring shaft.
8. The test apparatus of claim 7, wherein an outer wall of the graphite tube is coated with an epoxy layer to form a self-lubricating seal with the sealing diaphragm and the thermal spacer.
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| CN201822122382.1U CN209945956U (en) | 2018-12-17 | 2018-12-17 | Corrosion life test equipment for corrosion-resistant material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580467A (en) * | 2018-12-17 | 2019-04-05 | 中国神华能源股份有限公司 | A kind of test equipment and test method of resistant material corrosion life |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580467A (en) * | 2018-12-17 | 2019-04-05 | 中国神华能源股份有限公司 | A kind of test equipment and test method of resistant material corrosion life |
| CN109580467B (en) * | 2018-12-17 | 2023-09-22 | 中国神华能源股份有限公司 | Testing equipment and testing method for corrosion life of corrosion-resistant material |
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