CN201780254U - Sulfuric acid dew point corrosion resisting tester - Google Patents
Sulfuric acid dew point corrosion resisting tester Download PDFInfo
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- CN201780254U CN201780254U CN2010202666029U CN201020266602U CN201780254U CN 201780254 U CN201780254 U CN 201780254U CN 2010202666029 U CN2010202666029 U CN 2010202666029U CN 201020266602 U CN201020266602 U CN 201020266602U CN 201780254 U CN201780254 U CN 201780254U
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- dew point
- sulfuric acid
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- point corrosion
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Abstract
The utility model relates to a sulfuric acid dew point corrosion resisting tester, in particular a metal material sulfuric acid dew point corrosion resisting tester which mainly solves the technical problems that the sulfuric acid concentration and the temperature is difficult to control in the ordinary corrosion test and the traditional patent devices are more complex. The sulfuric acid dew point corrosion resisting tester comprises a circulating cooling water device, a box body, a tank cover, a heater, a condensation pipe and a temperature controller. The box body is hinged with the tank cover, a gasket seal is arranged on the connection part of the box body and the tank cover, the circulating cooling water device which is used for fast condensing the heated evaporated water and returning the condensed water to a solvent in the box body is connected with the condensation pipe which is fixed under the tank cover through a pipe, the temperature controller is connected with a thermocouple, the end part of the thermocouple is close to the bottom of the box body, the temperature controller is also connected with a heating rod which is fixed at the middle-lower part of the box body, the testing sample can be hung on a sheet hanging frame fixed on the box body or the tank box or the frame in the box body. The sulfuric acid dew point corrosion resisting tester can be used for testing sulfuric acid dew point for a long time with high accuracy in the whole dew point scope of sulfuric acid, especially at a higher temperature.
Description
Technical field:
The utility model relates to a kind of test unit of testing acid corrosion, is specially a kind of metal material sulfuric-resisting dew point corrosion test device.
Background technology:
Sulphur in the fuel is converted into sulfuric acid after burning, in various flues, heat exchanger tube, when temperature is cooled to the sulphuric acid dew point temperature when following, sulfuric acid condenses on the tube wall, and pipe wall material is caused strong corrosion.Yu Fuzhou points out in " metal material corrosion resistance " book, can adopt sulfuric acid to soak experiment entirely and represent sulfuric-resisting dew point corrosion ability.This type of pipe wall material is generally done with sulfuric-resisting dew point corrosion steel at present, checks and accepts material property by the sulfuric-resisting dew point corrosion test.This experiment through a period of time (a few hours are to a couple of days), is checked the corrosion situation by use the steel disc lacing film in the sulfuric acid solution of variable concentrations and temperature.The concentration difference of dew point sulfuric acid under the different temperatures, corrosive power be different (as shown in Figure 1, 2) also, when carrying out sulfuric-resisting dew point corrosion experiment, need be to temperature, and especially sulfuric acid concentration is accurately controlled.Present sulfuric-resisting dew point corrosion test generally experimentizes by add sulfuric acid in open-top receptacle, because the moisture in the sulfuric acid slowly evaporates when temperature is higher, causes concentration change, not only to often keep the skin wet and also accuracy of detection low.Therefore, be necessary to design a kind of device, can experimentize under the stable prerequisite of sulfuric acid concentration keeping, avoid the influence of water evaporates.Chinese patent application 200810034803.3 discloses " proving installation of resistance dew-point corrosion of evaluating material and method of testing ", and this application apparatus structure is: the SO2 gas cylinder is connected to gas mixer by flowmeter after connecting drying tower; Air compressor machine drying tower is connected with bubbling bottle in placing Water Tank with Temp.-controlled by flowmeter, is connected to gas mixer; Mixer and heating furnace and device for absorbing tail gas polyphone are placed the ceramic crucible that corrosive medium and sample are housed in the heating furnace 10.This device is to estimate by the weight change of measuring sample experiment front and back, this device is main to form sulfuric acid corrosion gas working condition by simulation, therefore its device is comparatively complicated, and be not easy to control the concentration of sulfuric acid, because the sulfuric acid solution in the heating furnace is in continuous evaporation, cause sulphuric acid concentration, if contain moisture in the sulfur dioxide gas of introducing sulfuric acid is partly diluted, this process is difficult to control for the influence of sulfuric acid ultimate density.This application crucible direct experiment can't prevent the generation of limit portion effect and embedding effect.
The utility model content:
The purpose of this utility model provides a kind of metal material sulfuric-resisting dew point corrosion test device, mainly solves in the general corrosion test comparatively complicated technology problem of sulfuric acid concentration and difficult control of temperature and existing Patent equipment.The utility model can be under sulfuric acid whole dew point scope, particularly higher temperature, and the dew point of sulfuric acid is carried out long-term experiment, the accuracy in detection height.
Technical solutions of the utility model are: a kind of sulfuric-resisting dew point corrosion test device, comprise the recirculated cooling water device, and casing, case lid, well heater, condenser pipe and temperature controller are formed.Casing and case lid are by being hinged and connected, casing and case lid junction are provided with gasket seal, the recirculated cooling water device links to each other with the condenser pipe that is fixed on the case lid below by pipeline, be used for making the moisture rapid condensation of heating evaporation to be back to the solution of casing, temperature controller is connected to thermopair, the thermopair end is near bottom half, and temperature controller also connects the heating rod that is fixed on the casing middle and lower part, and test sample can be suspended on the film hangers that is fixed on casing or case lid or on the casing inner support.
Be better insulation, stick heat insulation layer at casing and case lid outer wall.Bottom at casing is provided with bleed valve.
The beneficial effects of the utility model: this sulfuric-resisting dew point corrosion test device adopts thermopair to gather solution temperature, and probe temperature can be accurately controlled in temperature controller control heating.The chilled water that produces with the recirculated cooling water device cools off by the condenser pipe water vapor that heating produces to sulfuric acid, it is turned back in the solution, can guarantee that the solution sulfuric acid concentration does not change for a long time, and since the water vapor that reaction generates cool off immediately and be back in the solution, system pressure remains unchanged, and operates safer.So this equipment can be in the whole sulphuric acid dew point scope about room temperature to 180 degree centigrade, fixed temperature and concentration are carried out long-term corrosion-resistant experiment, satisfy metal material sulfuric-resisting dew point corrosion experimental requirements.
Description of drawings:
Fig. 1 is the corresponding relation of sulphuric acid dew point concentration and temperature
Fig. 2 is a corrosion of carbon steel curve under the corrosion of sulfuric acid at dew point environment
Fig. 3 is the utility model structural representation
Among the figure: 1. recirculated cooling water device; 2. casing; 3. case lid; 4. heating rod; 5. condenser pipe; 6. temperature controller; 7. thermopair; 8. film hangers; 9. bleed valve; 10. power switch; 11. gasket seal; 12. heat insulation layer.
Embodiment:
Referring to Fig. 1 and Fig. 2, a kind of sulfuric-resisting dew point corrosion test device comprises recirculated cooling water device 1, casing 2, case lid 3, well heater 4, condenser pipe 5 and temperature controller 6.Casing 2 and case lid 3 are by being hinged and connected, casing and case lid junction are provided with gasket seal 11, recirculated cooling water device (H210 type, LabTech company) 1 is connected with condenser pipe 5 by pipeline, and condenser pipe 5 is fixed on the case lid 3, on case lid, also fixed simultaneously film hangers 8, sample hangs on the film hangers 8, and temperature controller is connected to thermopair 7, and the thermopair end is near bottom half, temperature controller also is connected to heating rod 4, and heating rod 4 adopts two and is fixed on the casing middle and lower part.Temperature controller 6 (AI518 type, the scientific and technological Automation Co., Ltd of Xiamen space electricity) is arranged on the casing left side, and the temperature controller below is provided with the power switch 10 of equipment, in the bottom of casing bleed valve 9 is set.
Wherein casing 2 and case lid 3 outer walls post heat insulation layer, keep sealing by gasket seal 11 between casing and the case lid.Casing can adopt pyroceram or pottery to make, in case produce the galvanic corrosion effect, condenser pipe can be made of stainless steel or red copper, and case lid can be used material such as stainless steel, fiberglass.Heating rod can be selected double-deck quartz tube heater for use.
The course of work is as follows:
1. preliminary work: open case lid 3, pour certain density sulfuric acid into according to the experiment needs.As requested metal sample being made as a certain size sheet, in an end perforate of sheet sample, is one section teflon silk thread in perforate.
2. begin test: use the teflon fiber suspension below film hangers 8 in sample, make sulfuric acid solution submergence sample,, can not contact between the sample if a plurality of samples are arranged.Close case lid 3, open device power supply (DPS) switch 10, on temperature controller 6, temperature is arranged on the dewpoint temperature corresponding with sulfuric acid concentration, open recirculated cooling water device 1.Displays temperature begins the dew point corrosion test timing after arriving design temperature.
3. experiment finishes: after reaching predetermined etching time, close heating power supply, leave standstill a moment, open case lid 3, take out lacing film, clean lacing film with deionized water and absolute ethyl alcohol, lacing film is preserved the analysis that is used for corrosion resistance.
Claims (3)
1. sulfuric-resisting dew point corrosion test device, it is characterized in that comprising the recirculated cooling water device, casing, case lid, well heater, condenser pipe and temperature controller are formed, casing and case lid are by being hinged and connected, casing and case lid junction are provided with gasket seal, the recirculated cooling water device links to each other with the condenser pipe that is fixed on the case lid below by pipeline, and temperature controller is connected to thermopair, and the thermopair end is near bottom half, temperature controller also connects the heating rod that is fixed on the casing middle and lower part, and test sample is suspended on the film hangers that is fixed on casing or case lid or on the casing inner support.
2. a kind of sulfuric-resisting dew point corrosion test device according to claim 1 is characterized in that sticking heat insulation layer at casing and case lid outer wall.
3. a kind of sulfuric-resisting dew point corrosion test device according to claim 1 is characterized in that in the bottom of casing bleed valve being set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202666029U CN201780254U (en) | 2010-07-21 | 2010-07-21 | Sulfuric acid dew point corrosion resisting tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202666029U CN201780254U (en) | 2010-07-21 | 2010-07-21 | Sulfuric acid dew point corrosion resisting tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201780254U true CN201780254U (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010202666029U Expired - Fee Related CN201780254U (en) | 2010-07-21 | 2010-07-21 | Sulfuric acid dew point corrosion resisting tester |
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| CN (1) | CN201780254U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237112A (en) * | 2013-06-19 | 2014-12-24 | 鞍钢股份有限公司 | Device for testing sulfuric acid dew point corrosion resistance of material |
| CN104458548A (en) * | 2014-07-21 | 2015-03-25 | 珠海罗西尼表业有限公司 | Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer |
| CN104614308A (en) * | 2015-02-26 | 2015-05-13 | 中国特种设备检测研究院 | Experimental device for simulating sulfuric acid dew point corrosion |
| CN105954181A (en) * | 2016-05-23 | 2016-09-21 | 北京科技大学 | Corrosion experiment box simulating condensing environment and using method thereof |
| CN114428051A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Dew point corrosion assessment device with controllable condensation temperature |
-
2010
- 2010-07-21 CN CN2010202666029U patent/CN201780254U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237112A (en) * | 2013-06-19 | 2014-12-24 | 鞍钢股份有限公司 | Device for testing sulfuric acid dew point corrosion resistance of material |
| CN104237112B (en) * | 2013-06-19 | 2018-01-02 | 鞍钢股份有限公司 | A kind of experimental rig of test material resistant to sulfuric acid dew point corrosion |
| CN104458548A (en) * | 2014-07-21 | 2015-03-25 | 珠海罗西尼表业有限公司 | Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer |
| CN104458548B (en) * | 2014-07-21 | 2017-04-26 | 珠海罗西尼表业有限公司 | Method for detecting oxidation corrosion resistance of vacuum plating rose gold coating and plating layer |
| CN104614308A (en) * | 2015-02-26 | 2015-05-13 | 中国特种设备检测研究院 | Experimental device for simulating sulfuric acid dew point corrosion |
| CN104614308B (en) * | 2015-02-26 | 2017-05-24 | 中国特种设备检测研究院 | Experimental device for simulating sulfuric acid dew point corrosion |
| CN105954181A (en) * | 2016-05-23 | 2016-09-21 | 北京科技大学 | Corrosion experiment box simulating condensing environment and using method thereof |
| CN114428051A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Dew point corrosion assessment device with controllable condensation temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20140721 |
|
| EXPY | Termination of patent right or utility model |