CN106872347A - A kind of metal erosion acceleration test apparatus and method - Google Patents
A kind of metal erosion acceleration test apparatus and method Download PDFInfo
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- CN106872347A CN106872347A CN201710170223.6A CN201710170223A CN106872347A CN 106872347 A CN106872347 A CN 106872347A CN 201710170223 A CN201710170223 A CN 201710170223A CN 106872347 A CN106872347 A CN 106872347A
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- corrosion
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- metal erosion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
Abstract
The present invention discloses a kind of metal erosion acceleration test apparatus and method, including power supply, storage tank, temperature sensor, weight sensor, chamber, corrosion experiment box and heater；Instrument connection is provided with the top of chamber；Some corrosion experiment boxes are provided with chamber, both sides set inert electrode in corrosion test box, the inert electrode in some corrosion experiment boxes is connected in series power supply；Top in chamber is provided with temperature sensor and some weight sensors, and some corrosion experiment boxes are suspended on the hook of corresponding weight sensor；Bottom is provided with heater in chamber；Power supply and storage tank are arranged at experiment upper box part, and the outlet of storage tank is suspended from corrosion experiment box top, and magnetic valve is carried on outlet.The present invention considers the both macro and micro factor of metal erosion in the case of various factors coupling, is capable of achieving the function of the corrosive environment such as analog temperature, water content, stray electrical current, with simple to operate, the advantages of high degree of automation.
Description
Technical field
The present invention relates to metal erosion protection field, and in particular to a kind of metal erosion acceleration test apparatus and method.
Background technology
With the push away near of China's modernization construction, the demand to using energy source, infrastructure and industrial development increasingly increases,
Particularly extra-high voltage grid, extra long distance pipeline, the appearance of ultra-large type engineering and development is pacified for the operation of buried metal material
The requirement of complete and service life is higher.The metal structures of underground are embedded in, due to by various physicochemical properties in soil and spuious
The influence of electric current, causes Soil Corrosion problem to protrude very much, once there is serious corrosion, it is possible to cause serious
Security incident, so as to bring immeasurable economic loss and social influence.Although the soil at this stage in the world to metal is rotten
Erosion integrated evaluating method and assessment technique are paid much attention to, constantly perfect, but remain weak point.Make a general survey of state
Inside and outside present Research, most representational in terms of soil corrosion integrated evaluating method is German DIN50929 standards, the U.S.
ANSIA21.5 methods, but they have weak point.As Germany's DIN50929 standards have a bad adaptability, remolding sensitivity compared with
Low the characteristics of, do not fully take into account influencing each other between each factor of soil corrosion and connect each other, it is impossible to prominent reflection master
Want the influence degree of corrosion factor；ANSIA21.5 methods in the U.S. do not have general applicability, are suitable only for cast iron pipe in soil
Whether need to use polyethylene protective film when using, and may not be used in the case of other.And, all do not accounted in the above method
It is spuious under some specific running environment to the influence very important corrosion factor of underground metalliferous structures --- stray electrical current
Electric current often plays main corrosion acceleration, such as direct current grounding pole, railway electric car, therefore these integrated evaluating methods pair
There is certain limitation in the soil corrosion evaluation of grounded screen.
The content of the invention
It is an object of the invention to provide a kind of metal erosion acceleration test apparatus and method, asked with solving above-mentioned technology
Topic.The present invention can simulate stray electrical current and traditional corrosion factor (particularly water content, temperature) coupling under soil environment, be used for
Metal erosion accelerated test, for it is further proposed that comprehensively feasible soil corrosion integrated evaluating method provides hardware foundation.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of metal erosion acceleration test apparatus, including power supply, storage tank, temperature sensor, weight sensor, experiment
Case, corrosion experiment box and heater；Instrument connection is provided with the top of chamber；Some corrosion experiment boxes are provided with chamber, are corroded
Both sides set inert electrode in test box, and the inert electrode in some corrosion experiment boxes is connected in series power supply；It is upper in chamber
Portion is provided with temperature sensor and some weight sensors, and some corrosion experiment boxes are suspended on the hook of corresponding weight sensor
On；Bottom is provided with heater in chamber；Power supply and storage tank are arranged at experiment upper box part, and the outlet of storage tank is suspended from corrosion
Experiment box top, carries magnetic valve on outlet.
Further, the power supply is D.C. regulated power supply；The chamber carries heat-insulation layer.
Further, the inert electrode is graphite electrode, platinum electrode or titanium alloy electrode.
Further, it is provided with for corrosion of metal test piece to be corroded or electrochemical system in the corrosion experiment box.
Further, also including control and test system；Control and test system include man-machine interface, control device sum
According to harvester；Man-machine interface connects control device and data acquisition device；Control device connect data acquisition device and each
Magnetic valve；Data acquisition device connects temperature sensor and weight sensor.
Further, three electrode corrosion systems are provided with corrosion experiment box, three electrode corrosion systems are connected in experiment
Electrochemical test system outside case, constitutes electro-chemical test system.
A kind of metal erosion accelerated test method, including electric current accelerated corrosion simulation steps：Set by man-machine interface
Voltage, the electric current of power supply, start corrosion current loop in corrosion current supply circuit so that electric current is by inert electrode, corrosion
Medium, corrosion coupon or electrochemical system in experiment box carry out corrosion acceleration；Electric current, voltage parameter in corrosion current loop
Man-machine interface is gathered and fed back to by data acquisition device；After abrasion cycle terminates, the etch state of corrosion coupon is observed
And measure corrosion parameter or electro-chemical test is directly carried out using electrochemical test system by instrument connection.
Further, also including temperature controlling step, control device according to the control strategy of write-in carry out the opening of heater/
Stop action control, if temperature sensor detects threshold value of the experiment the temperature inside the box less than setting, start heater, in chamber
Air is heated, and after the threshold range of setting is reached, heater is stopped, and keeps experiment the temperature inside the box constant.
Further, also including water content simulation steps：The weight of the corrosion experiment box arrived with weight sensor primary detection
Used as initial value, with the carrying out of experiment, the moisture of corrosive medium can gradually lose amount, the weight that weight sensor real-time detection is arrived
Amount is compared with initial value, if weight loss values exceed the threshold value of setting, control device will open water charging system electromagnetic valve,
Water injection corrosion experiment box in storage tank, after the threshold range of setting is reached, electromagnetic valve is closed, corrosive medium water content
Keep relative constancy.
The design principle of experimental provision of the present invention is：The structure based on chamber, corrosion experiment box built with soil or
The aqueous solution or other corrosive mediums, simulate the corrosive environment of metal material directly contact, in order to obtain accelerated corrosion effect, in corruption
Erosion experiment box both sides set the inert electrode of graphite or platinum or titanium alloy or other corrosion-resistant conductive materials so that corrosive medium,
Inert electrode forms a corrosion current loop for series connection so that corrosive medium internal corrosion test piece or electrochemical system are placed in electricity
In flow field, so as to reach the effect of accelerated corrosion, wherein, the control end of control device is connected with the controlled end of power supply；Power supply is
Whole corrosion current loop provides electric power support, and according to experiment demand, by the different size of voltage of control device controlled output,
Electric current, and feed back to data acquisition device；Corrosion coupon or electrochemical system are in accelerated corrosion system, carry out accelerated corrosion
Simulated experiment.
In order to keep the temperature in chamber, the effect of environment temperature simulation is reached, the present invention also has temperature simulation work(
Can, main composition includes control device, data acquisition device, heater and temperature sensor.Specifically：Set in experiment lower box part
Heater is put, the control end of control device is connected with the controlled end of heater, signal acquisition terminal and the setting of data acquisition device
In the temperature sensor connection in experiment upper box part.
In order to keep the water content of corrosive medium, water content simulation effect is reached, also there is the present invention water content to simulate work(
Can, main composition includes control device, data acquisition device, storage tank, the water charging system with electromagnetic valve and weight sensing
Device.Specifically：Corrosion experiment box is suspended on the hook of weight sensor lower end, and water charging system outlet is suspended from corrosion experiment box
Portion, by storage tank for it provides moisture source；The control end of control device is connected with the controlled end of electromagnetic valve, data acquisition dress
The signal acquisition terminal put is connected with the weight sensor being arranged in experiment upper box part.
In order to it is direct, quickly obtain corrosion parameter, the present invention also has electrochemical test function, and main composition includes electrification
Learn test system, electrochemical system.Electrochemical test system is by the three-electrode electro Chemical body in instrument connection and corrosion experiment box
It is the connection of dependence test line, determines the electrochemical parameter of research object.
The present invention compared with prior art, has the following advantages and advantages：Be capable of achieving analog temperature, water content,
The function of the corrosive environments such as stray electrical current, the control especially with weight sensor to corrosive medium water content is more accurate.Tool
Have simple to operate, the advantages of high degree of automation.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.
Fig. 1 is the schematic layout pattern of each part of the invention.
Wherein：1st, power supply；2nd, storage tank；3rd, control and test system；4th, instrument connection；5th, temperature sensor；6th, weight is passed
Sensor；7th, chamber；8th, electromagnetic valve；9th, inert electrode；10th, corrosion coupon or electrochemical system；11st, corrosion experiment box；12、
Heater.13rd, man-machine interface；14th, control device；15th, data acquisition device；16th, electrochemical test system.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Refer to shown in Fig. 1, a kind of metal erosion acceleration test apparatus of the invention, including one seals and is provided with insulation
The chamber 7 of layer, experiment upper box part opens up instrument connection 4；Three corrosion experiment boxes 11 are provided with chamber 7；Corrosion experiment box 11
Interior both sides set inert electrode 9, and the inert electrode in three corrosion experiment boxes 11 passes through wired in series, corrosion coupon or electrochemistry
System 10 is embedded in corrosion experiment box internal corrosion medium；Power supply 1, storage tank 2 and control and test system 3 are arranged at chamber
In the independent case body of top.In order to realize above-mentioned each device of control, the present invention is also provided with control and test system 3, including people
Machine interface 13, control device 14, data acquisition device 15 and electrochemical test system 16.Man-machine interface is touch display screen, with
Control device and data acquisition device are connected, and can be carried out parameter setting or be read real time execution parameter；The control end of control device
Controlled end with heater or power supply or water charging system electromagnetic valve is connected, according to write-in control strategy carry out above-mentioned part or
" open/stop " action and output parameter control of device；The feedback of data acquisition device collecting temperature sensor and weight sensor
Signal, and the signal of collection is uploaded to control device and man-machine interface；Electrochemical test system is real with corrosion by instrument connection
The three electrode corrosion system dependence test lines connection tested in box, forms electro-chemical test system, the electricity for determining research object
Chemical parameters.
In order to keep the temperature in chamber, the effect of environment temperature simulation is reached, the present invention sets the He of having heaters 12
Temperature sensor 5.Heater 12 and temperature sensor 5 be may be contained within inside chamber 7, and heater 12 is arranged under chamber 7
Portion, the control end of control device 14 is connected with the controlled end of heater 12, signal acquisition terminal and the setting of data acquisition device 15
Connected in the temperature sensor 5 in experiment upper box part.
In order to keep the water content of corrosive medium, water content simulation effect is reached, the present invention is additionally provided with magnetic valve
The water charging system and weight sensor 6 of door 8.Wherein, corrosion experiment box 11 is suspended on the hook of the lower end of weight sensor 6, water storage
The outlet of case 2 is suspended from the top of corrosion experiment box 11, and electromagnetic valve 8 is carried on outlet；The control end of control device 14 and electricity
The controlled end connection of magnet valve door 8, the signal acquisition terminal of data acquisition device 15 is sensed with the weight being arranged in experiment upper box part
Device 6 is connected.
In order to it is direct, quickly obtain corrosion parameter, electrochemical test system of the invention passes through instrument connection and corrosion experiment
Three-electrode electro Chemical system dependence test line connection in box, determines the electrochemical parameter of research object.
Based on a kind of corrosion simulation method of metal erosion acceleration test apparatus, comprise the following steps：
Electric current accelerated corrosion simulation steps：Man-machine interface 13 sets voltage, the electricity of power supply 1 in corrosion current supply circuit
Stream, control device 14 starts corrosion current loop so that electric current is by the medium in inert electrode 9, corrosion experiment box 11, corrosion
Test piece or electrochemical system 10 carry out corrosion acceleration；Data acquisition device 15 gathers electric current, the electricity in above-mentioned corrosion current loop
Pressure parameter simultaneously feeds back to man-machine interface.After abrasion cycle terminates, observe the etch state of corrosion coupon and measure corrosion parameter
Or electro-chemical test is directly carried out using electrochemical test system 16 by instrument connection 4.
Corrosion simulation method, further comprising the steps of at least one：
Temperature simulation step：Control device 14 acts control according to " open/stop " that the control strategy of write-in carries out heater 12
System, if temperature sensor 5 detects temperature in chamber 7 and, less than the threshold value of setting, starts heater 12, to air in chamber
Heated, after the threshold range of setting is reached, heater is stopped, keep experiment the temperature inside the box constant.
Water content simulation steps：The weight of the corrosion experiment box arrived using the primary detection of weight sensor 6 as initial value, with
The carrying out of experiment, the moisture of corrosive medium can gradually lose, the real-time detection of weight sensor 6 to weight carried out with initial value
Compare, if weight loss values exceed the threshold value of setting, control device will open water charging system electromagnetic valve 8, the water in storage tank 2
Corrosion experiment box can be injected, after the threshold range of setting is reached, electromagnetic valve is closed, corrosive medium water content keeps relatively permanent
It is fixed.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (9)
1. a kind of metal erosion acceleration test apparatus, it is characterised in that including power supply (1), storage tank (2), temperature sensor
(5), weight sensor (6), chamber (7), corrosion experiment box (11) and heater (12)；
Instrument connection (4) is provided with the top of chamber (7)；Some corrosion experiment boxes (11), corrosion test box are provided with chamber (7)
Interior both sides set inert electrode (9), and the inert electrode in some corrosion experiment boxes (11) is connected in series power supply；
Top in chamber (7) is provided with temperature sensor (5) and some weight sensors (6), some corrosion experiment boxes (11)
It is suspended on the hook of corresponding weight sensor (6)；Chamber (7) interior bottom is provided with heater (12)；
Power supply (1) and storage tank (2) are arranged at experiment upper box part, and the outlet of storage tank is suspended from corrosion experiment box (11) top,
Magnetic valve is carried on outlet.
2. a kind of metal erosion acceleration test apparatus according to claim 1, it is characterised in that the power supply is that direct current is steady
Voltage source；The chamber (7) is with heat-insulation layer.
3. a kind of metal erosion acceleration test apparatus according to claim 1, it is characterised in that the inert electrode is stone
Electrode ink, platinum electrode or titanium alloy electrode.
4. a kind of metal erosion acceleration test apparatus according to claim 1, it is characterised in that the corrosion experiment box
(11) it is provided with for corrosion of metal test piece to be corroded or electrochemical system (10) in.
5. a kind of metal erosion acceleration test apparatus according to claim 1, it is characterised in that also including controlling and testing
System (3)；Control and test system (3) include man-machine interface (13), control device (14) and data acquisition device (15)；It is man-machine
Interface (13) connects control device (14) and data acquisition device (15)；Control device (14) connect data acquisition device (15) and
Each magnetic valve；Data acquisition device (15) connects temperature sensor and weight sensor.
6. a kind of metal erosion acceleration test apparatus according to claim 5, it is characterised in that in corrosion experiment box (11)
Three electrode corrosion systems are provided with, three electrode corrosion systems are connected in the electrochemical test system (16) outside chamber, structure
Into electro-chemical test system.
7. a kind of metal erosion accelerated test method, it is characterised in that accelerated based on a kind of metal erosion described in claim 5
Experimental rig, including electric current accelerated corrosion simulation steps：Power supply is electric in setting corrosion current supply circuit by man-machine interface (13)
Voltage, the electric current in source (1), start corrosion current loop so that electric current is by inert electrode (9), corrosion experiment box (11)
Medium, corrosion coupon or electrochemical system (10) carry out corrosion acceleration；Electric current, voltage parameter in corrosion current loop is by number
Man-machine interface is gathered and fed back to according to harvester；After abrasion cycle terminates, observe the etch state of corrosion coupon and measure
Corrosion parameter directly carries out electro-chemical test by instrument connection using electrochemical test system.
8. a kind of metal erosion accelerated test method according to claim 7, it is characterised in that also walked including temperature control
Suddenly, control device (14) carries out the opening of heater (12)/stop action control, if temperature sensor according to the control strategy of write-in
(5) threshold value of chamber (7) the interior temperature less than setting is detected, starts heater (12), air in chamber is heated,
After the threshold range of setting is reached, heater is stopped, and keeps experiment the temperature inside the box constant.
9. a kind of metal erosion accelerated test method according to claim 7, it is characterised in that also simulated including water content
Step：The weight of the corrosion experiment box arrived using weight sensor (6) primary detection is rotten with the carrying out of experiment as initial value
Lose medium moisture can gradually lose, weight sensor (6) real-time detection to weight be compared with initial value, if weight damage
Mistake value exceedes the threshold value of setting, and control device will open water charging system electromagnetic valve (8), the water injection corrosion in storage tank (2)
Experiment box, after the threshold range of setting is reached, electromagnetic valve is closed, and corrosive medium water content keeps relative constancy.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489886A (en) * | 2018-03-07 | 2018-09-04 | 中国石油天然气集团有限公司 | A kind of gas storage tube corrosion simulator and the analogy method based on the device |
| CN108956444A (en) * | 2018-06-14 | 2018-12-07 | 中国船舶重工集团公司第七二五研究所 | A kind of corrosion-inhibiting coating Natural Environmental Test and performance detecting system |
| CN112669305A (en) * | 2021-01-05 | 2021-04-16 | 三峡大学 | Metal surface rust resistance test bench and rust resistance evaluation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489886A (en) * | 2018-03-07 | 2018-09-04 | 中国石油天然气集团有限公司 | A kind of gas storage tube corrosion simulator and the analogy method based on the device |
| CN108956444A (en) * | 2018-06-14 | 2018-12-07 | 中国船舶重工集团公司第七二五研究所 | A kind of corrosion-inhibiting coating Natural Environmental Test and performance detecting system |
| CN112669305A (en) * | 2021-01-05 | 2021-04-16 | 三峡大学 | Metal surface rust resistance test bench and rust resistance evaluation method |
| CN112669305B (en) * | 2021-01-05 | 2022-01-21 | 三峡大学 | Metal surface rust resistance test bench and rust resistance evaluation method |
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