CN106814026A - A kind of clad plate corrosion resisting property method for rapidly testing - Google Patents
A kind of clad plate corrosion resisting property method for rapidly testing Download PDFInfo
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- CN106814026A CN106814026A CN201510868943.0A CN201510868943A CN106814026A CN 106814026 A CN106814026 A CN 106814026A CN 201510868943 A CN201510868943 A CN 201510868943A CN 106814026 A CN106814026 A CN 106814026A
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- stone
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Abstract
The present invention provides a kind of clad plate corrosion resisting property method for rapidly testing, experiment, neutral salt spray test are hit including sample processing, anti-stone, electrochemical AC impedance is tested, model is processed into first suitably sized, anti- stone is carried out to it and hits experiment, coating model after stone is hit carries out salt spray test in being put into salt spray test chamber, and then hitting model to the stone after salt fog carries out electrochemical AC impedance test, so that the AC impedance for obtaining.Using the corrosion resisting property of testing coating plate of the present invention, the evaluation cycle of corrosion resisting property can be reduced, present invention detection is quick, result is accurate, easily operation.
Description
Technical field
Field is evaluated the invention belongs to clad plate corrosion resisting property, more particularly to one kind is by evaluating stone
The method for hitting the corrosion resisting property of rear clad plate to predict original clad plate corrosion resisting property.
Background technology
Coated steel sheet is the warp with cold-reduced sheet, galvanizing, hot-dip aluminizing zinc or electrolytic galvanized sheet as substrate
Pre-treatment passivation primer coating and finish paint are crossed, there is excellent corrosion and anti-ageing by toasting to be formed
Change the clad plate of performance.
It is good with parent metal performance that the degree of coating base plate metal erosion directly depends on coating
Method bad, that the test of complete set system is must be set up for this and corrosion resistance coating energy is evaluated.
At present, the method for testing for evaluating clad plate corrosion resisting property includes general traditional test methods
(routine test method), salt spray test (salt spray test), damp heat test (humidity
cabinet test).These conventional accelerated corrosion result of the tests are to observe by the naked eye the damage of coating
Degree evaluates the grade of corrosion, and with very big subjectivity, and the cycle evaluated is long,
Through the evaluation method frequently as clad plate corrosion resisting property, it can not be used wherein resistance to neutral salt spray test
Carry out change of the quantitative analysis coating in process of the test, simply the corrosion resistance of qualitative evaluation coating
Can, and there is a problem of that the test period is long and human error is than larger.
Electrochemical impedance spectroscopy (EIS) method uses the sine wave disturbance signal of small amplitude, to tested
System disturbance is small, and coating for information about, can be accurate under can respectively obtaining different frequency sections
The rapidly anti-corrosion situation of testing coating, the frequency range that it is measured in addition is very wide, can be than other
Conventional electrochemical method obtains the information of more dynamic informations and electrode interface structure, is
It is a kind of for evaluating the corrosion proof main electrochemical method of clad plate, for clad plate corrosion resistance
Can test and have great importance.
During using electrochemical AC impedance method testing coating plate, the impedance value of anti-corrosion coating plate high
Will be very big, often beyond the test scope of equipment, direct measurement will be unable to obtain experiment knot
Really, it is necessary to process the face coat of clad plate, make electrochemical AC impedance Fast Evaluation
The corrosion resistance of clad plate is possibly realized.
《A kind of method and system of in-service corrosion resistance coating energy Fast Evaluation》
(CN200910089684.6)：Phase angle under CF with active time change energy
Reflect the Changing Pattern of the impedance during coating military service, set up a kind of in-service painting of Fast Evaluation
The electrochemical method of layer performance, system is by test probe, portable impedance instrument, notebook computer
Composition, tested by accelerated corrosion in laboratory the characteristic frequency that obtains different coating system and
Phase angles data under characteristic frequency, sets up standard database, according to live coating system,
Coating system for reference is selected in standard database, characteristic frequency and phase angles data is obtained.
The corrosion resisting property in service coating and life prediction for Fast Evaluation, stress to be applied to industry now
, coating performance quickly evaluation and test and management system software have also been needed, the technical ability to operating personnel will
Ask comparing high；
《Portable coating/metal corrosion resistance fast testing system》(CN98125839.5)：Should
System is made up of electrochemical probe, test circuit, notebook computer and the computer software for moving.
It is double-electrolyzer three-electrode system to pop one's head in, test circuit by interface, constant potential unit, single-chip microcomputer,
A/D and D/A is constituted, and test circuit is by Single-chip Controlling, single-chip microcomputer connection notebook computer.
The system stresses to be applied to industry spot, and test system is complicated, to the competency profiling of operating personnel
Compare high, signal transmission is by external interference than larger, actual field operation inconvenience；
Standard GB/T/T13448-2006《Color painted steel strip and steel band test method》It
Resistance to neutral salt spray test method：Sample is exposed to what is extremely specified in neutral sodium chloride salt fog atmosphere
After time, spread distance by the evaluation foaming of model, rusting grade and corrosion to judge model
Corrosion resisting property.Wherein, for plane plate specimen, according to standard GB/T/T1766-1995
Evaluation foaming grade, grade of getting rusty etc.；For drawing fork and notched specimen, one is selected in line
Individual representational region, at least six equidistant positions, measurement line to foaming and
The maximum corrosion of corrosion spreads distance, takes its arithmetic mean of instantaneous value, and as average corrosion spreads distance,
And record line it is minimum and maximum corrosion spread distance.The method evaluates the corrosion resistance of clad plate
Can, there is the shortcomings of test period is long, and gross evaluations and manual operation error are big.
The content of the invention
It is an object of the invention to overcome above mentioned problem and not enough and to provide a kind of clad plate anti-corrosion
Performance method for rapidly testing, the method can reduce the evaluation cycle of corrosion resisting property, fast with detection
Speed, result are accurate and easily operate.
The object of the present invention is achieved like this：
A kind of clad plate corrosion resisting property method for rapidly testing, including sample processing, anti-stone are hit
, be processed into for model first by experiment, neutral salt spray test, electrochemical AC impedance test
It is suitably sized, anti-stone is carried out to it and hits experiment, the coating model after stone is hit is put into salt
Salt spray test is carried out in mist chamber, then hitting model to the stone after salt fog carries out electrochemistry
Ac impedance measurement, so that the AC impedance for obtaining, wherein described anti-stone hits experiment
Instrument being hit using stone stone being carried out to clad plate and hit experiment, it is many that described anti-stone hits testing equipment
Function stone hits instrument or meets stone and hits function device；The impact media that the stone hits experiment is
Shot, rate-of flow 100ml~300ml, 20~50psi of surge；The stone hits examination
The number of shocks tested 2~3 times.
The corrosion resistance of clad plate corrosion resisting property, impedance value and clad plate is evaluated by impedance value
Energy grade correspondence is as follows：
Described sample is processed it is characterized in that 140~180mm of length, width
90~110mm.
The salt fog cycle is 24h~168h；
The electrochemical test solution of electrochemical AC impedance test for sodium chloride and go from
Sub- water configuration, mass fraction is 3.5%；
The beneficial effects of the present invention are：Stone is evaluated using electrochemical AC impedance method (EIS) to hit
The corrosion resisting property of clad plate judges to be hit without stone the corrosion resisting property of clad plate afterwards；The method
The evaluation cycle of corrosion resisting property can be reduced, with quick, accurate and easy operation of result of detection etc.
Feature.
Brief description of the drawings
Fig. 1 is the AC impedance figure of 1# clad plates.
Fig. 2 is the AC impedance figure of 2# clad plates.
Fig. 3 is the salt fog photo of 1# clad plates.
Fig. 4 is the salt fog photo of 2# clad plates.
Specific embodiment
Below by embodiment, the present invention is further illustrated.
The present invention is hit experiment, c salt spray tests and d electrochemistry and is handed over by the processing of a samples, the anti-stones of b
Flow impedance test composition.
Embodiment 1
Using the method for present invention offer to coating model to be measured, walked according to above-mentioned a steps, b
Suddenly, step c, Step d order are tested.The anti-stone of the embodiment of the present invention hits the main ginseng of experiment
Number main technologic parameters are shown in Table 1.Embodiment of the present invention AC impedance is shown in Table 2.Conventional salt fog
Corrosion test rating result is shown in Table 3.
Sample is processed into size for 170*105mm in a steps, and surface neat and tidy is without drawing
Wound；
Anti- stone hits experiment and hits instrument using multi-functional stone in b step, and using SAE standard, 90 degree are touched
Hit room and penetrate rifle combination, anti-stone hits experiment major parameter and is shown in Table 3；
Neutral salt spray test is according to GB/T 10125-1997 in step c《Artificial atmosphere corrosion examination
Test-salt spray test》Carry out, 24h continuously sprays, the salt fog time is 24h, sinking speed is
Per 80cm2(1~2) ml/h on area, NaCl solution pH are 6.5~7.2；
Electrochemical AC impedance test is mutually amplified using constant potential/galvanostat with lock in Step d
Device carries out electrochemical test, and three-electrode system, work area is 1cm2, swashed using sine wave
Signal is encouraged, amplitude is 10mV, and range of scanned frequencies is 10mHz~100kHz, and electrolyte is
3.5%NaCl solution, test temperature is 23 DEG C ± 1 DEG C.
The electrochemical AC impedance value of clad plate, described friendship are can obtain by above-mentioned steps
Flow impedance value is represented with capacitive reactance arc radius in figure, is exactly corresponding to the position of capacitive reactance arc arc top
The corresponding ordinate impedance value in curve peak position in the imaginary values of ordinate, i.e. figure.
And corrosion resisting property evaluation method is carried out to clad plate to be measured, in the way of a steps are invented
It is processed respectively, after then processing its paraffin edge sealing, puts it into salt spray test chamber,
1000h salt spray tests are carried out, after salt spray test terminates, according to standard GB/T/T1766-1995
Foaming size is evaluated clad plate salt spray test, and evaluation is taken over and is shown in Table 3.
The anti-stone of table 1 hits experiment major parameter
The embodiment of the present invention AC impedance result of table 2
| Embodiment | AC impedance/K Ω |
| 1-1 | 13 |
| 1-2 | 12 |
| 1-3 | 15 |
| 1-4 | 14.3 |
| 1-5 | 15 |
| 1-6 | 18 |
| 1-7 | 16 |
| 1-8 | 17 |
The conventional salt spray corrosion test rating result of table 3
| Embodiment | Anti-corrosion rating result |
| 1-1 | 2 |
| 1-2 | 2 |
| 1-3 | 2 |
| 1-4 | 2 |
| 1-5 | 2 |
| 1-6 | 2 |
| 1-7 | 2 |
| 1-8 | 2 |
Remarks：1000h salt spray tests, after salt spray test terminates, size are bubbled to clad plate according to standard GB/T/T1766-1995
Salt spray test is evaluated.
From the above results：1000h salt spray tests, salt are carried out to identical clad plate to be measured
After mist off-test, size is bubbled to clad plate salt fog according to standard GB/T/T1766-1995
Experiment carries out the result obtained by evaluation test and applies a kind of clad plate corrosion resisting property of the invention
The evaluation result that method for rapidly testing is obtained fits like a glove.
Embodiment 2
Using the method for present invention offer to clad plate sample to be measured under 6 kinds of different process
Carry out clad plate corrosion resisting property quickly to test, wherein the correspondence of numbering 1 clad plate to be measured is above-mentioned reality
Apply the clad plate to be measured in example 1.Embodiment of the present invention clad plate AC impedance is shown in Table 4.Apply
Laminate routine salt spray corrosion test rating result is shown in Table 5.
A samples are processed：Sample is processed into size for 170*105mm, surface neat and tidy without
Scratch；
The anti-stones of b hit experiment：Anti- stone hits experiment and hits instrument using multi-functional stone, using SAE standard
90 degree of collision cells are combined with rifle is penetrated, attack time 10s, and impact media is shot, and shot is circle
Shape, diameter 2mm, flow 150ml, surge 50psi, number of shocks 2 times；
C salt spray tests：Neutral salt spray test is according to GB/T 10125-1997《Artificial atmosphere is rotten
Corrosion test-salt spray test》Carry out, 24h continuously sprays, the salt fog time is 168h, sedimentation speed
Degree is every 80cm2(1~2) ml/h on area, NaCl solution pH are 6.5~7.2；
D electrochemical AC impedances are tested：Electrochemical AC impedance test uses constant potential/constant current
Instrument and lock-in amplifier carry out electrochemical test, and three-electrode system, work area is 1cm2,
Using sine wave exciting signal, amplitude is 10mV, and range of scanned frequencies is
10mHz~100kHz, electrolyte is 3.5%NaCl solution, and test temperature is 23 DEG C ± 1 DEG C.
Operated respectively according to above-mentioned step, the electrochemistry for obtaining different process clad plate is handed over
Flow impedance value, obtains AC impedance.Described AC impedance is with capacitive reactance arc radius in figure
It is exactly the imaginary values of the ordinate corresponding to the position of capacitive reactance arc arc top, i.e. curve in figure to represent
The corresponding ordinate impedance value in peak position.
And corrosion resisting property evaluation method is carried out to clad plate to be measured under above-mentioned 6 kinds of different process,
It is processed respectively in the way of a steps are invented, after then processing its paraffin edge sealing, by it
It is put into salt spray test chamber, carries out 1000h salt spray tests, after salt spray test terminates, according to state
Family's standard GB/T1766-1995 foamings size is evaluated clad plate salt spray test.
The embodiment of the present invention clad plate AC impedance result of table 4
| Numbering | Clad plate AC impedance/K Ω |
| 1 | 14.3 |
| 2 | 57.0 |
| 3 | 6.3 |
| 4 | 31.0 |
| 5 | 1.5 |
| 6 | 3.7 |
The clad plate of table 5 routine salt spray corrosion test rating result
| Numbering | Anti-corrosion rating result |
| 1 | 2 |
| 2 | 0 |
| 3 | 3 |
| 4 | 1 |
| 5 | 5 |
| 6 | 4 |
Remarks：1000h salt spray tests, after salt spray test terminates, size are bubbled to clad plate according to standard GB/T/T1766-1995
Salt spray test is evaluated.
From the above results：：1000h salt spray tests are carried out to identical clad plate to be measured,
After salt spray test terminates, size is bubbled to clad plate salt according to standard GB/T/T1766-1995
Mist experiment carries out the result obtained by evaluation test and applies a kind of clad plate corrosion resistance of the invention
The evaluation result that energy method for rapidly testing is obtained fits like a glove.
Claims (2)
1. a kind of clad plate corrosion resisting property method for rapidly testing, it is characterised in that including sample processing,
Anti- stone hits experiment, neutral salt spray test, and electrochemical AC impedance test first processes model
Into suitably sized, anti-stone carried out to it and hits experiment, the coating model after stone is hit is put into salt fog
Salt spray test is carried out in chamber, then hitting model to the stone after salt fog carries out electrochemical ac resistance
Anti- test, so that the AC impedance for obtaining, wherein described anti-stone hits experiment hits instrument using stone
Stone is carried out to clad plate and hits experiment, described anti-stone hit testing equipment for multi-functional stone hit instrument or
Meet stone and hit function device, the impact media that the stone hits experiment is shot, rate-of flow
100ml~300ml, 20~50psi of surge；The stone hits the number of shocks 2~3 times of experiment.
2. the method for quick testing coating plate corrosion resisting property according to claim 1, its feature exists
In the salt fog cycle is 24h~168h.
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| CN107179333A (en) * | 2017-06-20 | 2017-09-19 | 巴斯夫上海涂料有限公司 | Detect method and its application of the electrodeposited paint film to base material side along protective value |
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| CN108801887A (en) * | 2018-03-23 | 2018-11-13 | 上海大学 | The in-situ electrochemical test device and its method of simulated marine atmosphere corrosion environment |
| CN111542138A (en) * | 2020-05-08 | 2020-08-14 | 香港中文大学（深圳） | Electroheating method and application of ion conductor |
| CN112285008A (en) * | 2020-10-19 | 2021-01-29 | 神龙汽车有限公司 | Method for evaluating filiform corrosion resistance of finish turning surface of aluminum wheel |
| CN112816399A (en) * | 2020-12-30 | 2021-05-18 | 盛明 | Standard sample for circulating salt spray corrosion test of vehicle steel plate and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107179333A (en) * | 2017-06-20 | 2017-09-19 | 巴斯夫上海涂料有限公司 | Detect method and its application of the electrodeposited paint film to base material side along protective value |
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| CN111542138A (en) * | 2020-05-08 | 2020-08-14 | 香港中文大学（深圳） | Electroheating method and application of ion conductor |
| CN112285008A (en) * | 2020-10-19 | 2021-01-29 | 神龙汽车有限公司 | Method for evaluating filiform corrosion resistance of finish turning surface of aluminum wheel |
| CN112285008B (en) * | 2020-10-19 | 2023-08-29 | 神龙汽车有限公司 | Method for evaluating filiform corrosion resistance of finish turning surface of aluminum wheel |
| CN112816399A (en) * | 2020-12-30 | 2021-05-18 | 盛明 | Standard sample for circulating salt spray corrosion test of vehicle steel plate and preparation method thereof |
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