CN103308443B - A kind of accelerated corrosion method of testing of simulated soil corrosion process - Google Patents
A kind of accelerated corrosion method of testing of simulated soil corrosion process Download PDFInfo
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Abstract
The invention discloses a kind of accelerated corrosion method of testing of simulated soil corrosion process, the method comprises the steps: (1) according to the composition of target soil, prepares test solution with salt and water; (2) H is used
2sO
4or the pH value of described test solution is adjusted to test value by NaOH, as simulated soil corrosion steeping medium, wherein, described test value is identical with the pH value of target soil; (3) zeyssatite as carrier is mixed with steeping medium, to prepare the testing soil substantially identical with target soil physicochemical property; (4) sample is placed in testing soil, tests according to predetermined probe temperature, relative humidity and test period.
Description
Technical field
The present invention relates to a kind of accelerated corrosion method of testing of simulated soil corrosion process, more particularly, the present invention relates to a kind of accelerated corrosion method of testing with excellent simulation, acceleration and reproducible simulated soil corrosion process.
Background technology
Material corrosion problem in soil environment to be not only in corrosion science research field an important problem, is also the practical problems that solution is badly in need of in current underground works application institute.
In infrastructure construction, selecting of material will using the corrosion of material (goods) in territory of use's typical environment and aging data as important evidence.Therefore, carry out the research of metal material soil corrosion method of testing, particularly easy, fast effectively, the research of the new method of testing of specification, can provide material soil corrosion (property) data and soil corrosion fast appraisement method for engineering construction and safe operation, and the heavy losses brought to national economy because suffering soil corrosion for reducing underground structure provide the scientific basis of selection.
In soil corrosion research field, the innovation of method of testing, means is the bases of improving soil corrosion research integral level, and those skilled in the art attach great importance to its research.At present, the method for testing of soil corrosion mainly comprises outdoor scene and buries test underground and lab simulation tests two classes, and wherein lab simulation test comprises again electrochemical measurement and accelerated corrosion is tested.
(1) test is buried at outdoor scene underground
Burying test outside soil chamber underground refers in the typical soil environment chosen, bury the standard specimen prepared according to soil corrosion method of testing underground, then excavating by necessarily burying the cycle underground, through cleaning, rust cleaning, dry, the process such as to weigh, determining corrosion weight loss and the corrosion speed of test specimen.The physics, the chemical parameters that regularly measure soil is also needed in test process, record climatic data, and corresponding electrochemical measurements, to set up material, mutual relationship between environmental factor and corrosion speed, for the research carrying out soil corrosivity fast appraisement method provides basic data.This is a kind of simple, is also the method determining metal erosion speed in soil the most reliably, is the basic skills in soil corrosion test.Its shortcoming is that test period is oversize.
(2) lab simulation test
Outdoor scene buries the weightlessness of test specimen and the own classical way determined metal erosion speed in soil through becoming, evaluating soil corrosivity of analytical approach of soil physico-chemical property underground.The methods such as the in-situ technique accelerated test of setting up on this basis and grow up and statistical study, and the new method of Evaluating Soil Corrosivity, oneself is through becoming the important composition content of soil corrosion testing research work.Compared with burying test underground with scene, outdoor, lab simulation test has test condition and is easy to control, the advantage that parameter measurement is accurate, test period is short.But its limitation is that test condition and field condition deviation are comparatively large, therefore outdoor bury underground test and lab simulation test between relativity problem be the emphasis studied.Existing lab simulation test mainly can be divided into two classes:
1. the electrochemical measurement of soil corrosion
Although the data that test can provide soil corrosivity are buried at soil scene underground, this test is not only consuming time, and sample must be taken out from soil to record corrosion weight loss speed, cannot carry out continuous coverage.Electrochemical method is a kind of method succinct fast of soil erosion researching, and is widely used.The electrochemical method that can be used for soil corrosion test mainly contains: activation polarization, ac impedance spectroscopy, dynamic potential scanning and electrochemistry noise etc.
2. soil corrosion accelerated test method
Along with development, each department soil environmental background value of new material, built-in testing is buried in outdoor the limitation that its cycle is long, bury narrow range underground, need the research carrying out the indoor accelerated test method of soil corrosion and correlativity, soil corrosivity can be evaluated quickly and accurately, for the selection of engineering construction, construction, maintenance provide science guarantee.Current soil corrosion accelerated test method mainly contains strengthening medium method, galvanic couple accelerated process, electrolytic weight loss method, is interrupted polarization method and alternation of wetting and drying method.
Strengthening medium method: (as add C1 by the physicochemical property changing soil media
-, SO
4 2-, Fe
2+, CO
2, air etc.) change soil corrosivity, accelerate the corrosion of metal material in soil.The advantage of this method is without extra electric field impact, substantially controlled from concentration in the soil liquid, and the increase from concentration reduces the resistivity of soil, thus enhances soil corrosivity.But the limitation of the method is that the raising from concentration changes the physicochemical property of soil, while increasing corrosion rate, its corrosion mechanism, corrosion product etc. also can change.
Galvanic couple accelerated process: utilize carbon-iron or the copper-short circuit of ferroelectric couple in soil, composition bimetallic corrosion battery, adds the corrosion speed of big steel test piece in soil media.The speed-up ratio of the method can reach decades of times.Scholar is had to adopt copper-steel galvanic couple to carrying out soil corrosion accelerated test, in the soil of Daqing Area, when the area ratio of copper-steel galvanic couple reaches 30:1, control certain temperature, damp condition, can make the corrosion of steel within half a year, meet or exceed scene and bury the sheet degree of 30 years, speed-up ratio can reach 183.4 times.Indoor electric thermogalvanic corrision method of testing is at the effective ways not changing accelerated corrosion under soil physico-chemical property condition, its advantage is that accelerated test is easy, easy to operate, speed-up ratio is large, but owing to introducing the effect of Galvanic Current, has considerable influence to its soil corrosion behavior.
Electrolytic weight loss method: control impressed current or voltage, cathode and anode area ratio, the conditions such as cathode and anode distance make metal material electrolysis in soil, and the method can obtain the extreme value of metal material corrosion speed in different soils.
Be interrupted polarization method: polarized by step impressed current, shorten and corrode induction period, after making metal enter rapidly region of activation, stop polarization, thus a kind of method that corrosion speed is increased.The reverse square wave such as Kasahara of Japan, discontinuity polarization is carried out to sample, have studied in 40 kinds of soil, the polarization resistance, polarization capacity, corrosion potential etc. of test specimen, and test result and the basic corrosion data such as corrosion weight loss, pitting penetration are carried out correlation research.Result shows, has good correlativity (wherein: the spot corrosion factor=maximum pit depth/average corrosion depth) between metal/Soil Interface between the time constant of electrochemical circuit and the spot corrosion factor.
Several method is the soil corrosion method of testing that can obtain larger speed-up ratio at short notice above, but except strengthening medium method, they all carry out accelerated corrosion by impressed current, etching condition and pattern and actual conditions differ greatly, have certain mandatory, test mainly considers the effect of macro cell, have ignored the effect of corrosion micro cell, thus can only do sxemiquantitative research during prediction.
Environment accelerated process: in recent years, also developed a kind of accelerated corrosion test box, utilizes actual soil, do not introduce other ions, adopt the water cut, the temperature variation that control testing soil, suitably pass into air, carry out colding and heat succeed each other with alternation of wetting and drying to accelerate the corrosion speed of carbon steel in soil.The method does not change the character of soil, is a method not needing to be reached by impressed current accelerated corrosion object.Such as, No. 200720173948.2 Chinese patent discloses a kind of soil corrosion simulation accelerated test case, mainly through the change accelerated corrosion of temperature, water cut.The situation of change of the corrosion weight loss dynamic characteristic of material in soil, corrosion potential (Ecorr) and oxidation-reduction potential (Eh) under different test condition can be studied.
This soil corrosion simulation accelerated test utilizes actual soil, do not change soil corrosion mechanism, controls water cut, temperature variation, and suitably pass into air, realized the object of accelerated corrosion by the kinetic parameter changed in soil corrosion process.But its weak point is to fetch earth on the spot, the homogeneity of soil is difficult to ensure, and speed-up ratio is limited.
Above-mentioned all kinds of method of testing can have positive effect to judge material Corrosion resistance to a certain extent, but all there is respective limitation.Therefore, need exploitation a kind of under guarantee does not change the condition of soil corrosion mechanism, the accelerated corrosion method of testing of corrosion simulated new simulated soil corrosion process can be carried out according to the physicochemical property of target soil.
Summary of the invention
The object of the present invention is to provide a kind of soil corrosion method of testing, can effectively simulate under the condition not changing soil corrosion mechanism and accelerate actual soil corrosion.
An aspect of of the present present invention provides a kind of accelerated corrosion method of testing of simulated soil corrosion process, and the method comprises the steps: (1) according to the composition of target soil, prepares test solution with salt and water; (2) H is used
2sO
4or the pH value of described test solution is adjusted to test value by NaOH, as simulated soil corrosion steeping medium; (3) zeyssatite as carrier is mixed with steeping medium, to prepare the testing soil substantially identical with target soil physicochemical property; (4) sample is placed in testing soil, test according to predetermined probe temperature, relative humidity and test period, wherein, the pH value of based target soil and the diatomaceous pH value used are to determine described test value, and the content of each component of based target soil determines the consumption of salt, water, zeyssatite and acid or alkali.
According to a further aspect in the invention, described acid can comprise sulfuric acid, and described alkali can comprise NaOH, and described salt can comprise NaCl, Na
2sO
4, NaHCO
3, NaNO
3, CaCl
2, MgSO
4, KNO
3or common salinity in other soil.
According to a further aspect in the invention, described method of testing also can comprise: (5) carry out corrosion weight loss, corrosion product and morphology analysis after processing step (4) gained sample.
According to a further aspect in the invention, wherein: described in step (3), the range of adjustment of the pH value of testing soil can be 3-11.
According to a further aspect in the invention, wherein: diatomaceous bulk density described in step (3) can between 0.34-0.65g/cm, and specific surface area can between 40-65m/g, and order number scope can be 20-200 order.
According to a further aspect in the invention, wherein: the Range of measuring temp described in step (4) can be-40-100 DEG C, and the scope of relative humidity can be 5-99%.
According to a further aspect in the invention, wherein, the content of the salt in testing soil can be equal to or greater than the content of the salt in target soil.
According to a further aspect in the invention, wherein, the ratio between the content of often kind of salt in testing soil and the content of salt corresponding in target soil can be identical.
The present invention has the following advantages and one or more in beneficial effect:
(1) adopt method of testing of the present invention by the selection of dipping solution composition and content, the collocation of zeyssatite order number, dipping solution and zeyssatite blending ratio regulates and test environment temperature, relative humidity control, can the effective corrosion process of simulation material under different soil.The corrosion regularity of research material in different soils the Corrosion resistance of Fast Evaluation material, be similar to the test result inferring actual soil long-term corrosion from laboratory simulation accelerated corrosion test result.This method has significant accelerated corrosion while guarantee simulation: reach as high as 5-10 doubly.
(2) adopt main test carrier of the present invention to be zeyssatite, can effectively simulate actual soil.Zeyssatite chemical analysis mainly SiO
2, loose porous, can all kinds of salt ions fully in adsorptive solution; By the porosity of the effective simulated soil of the diatomaceous mixing energy of different meshes; And adjusted by dipping solution pH value, effectively can simulate various Acidity of Aikalinity soil.
(3) adopt main corrosion product of the present invention consistent with the main corrosion product that material is buried underground in actual soil: to be mainly alpha-feooh, Fe
2o
3, Fe
3o
4.
(4) repeated test shows that this method has good repeatability.
(5) applied range of the present invention, may be used for the soil corrosion research of material and corrosion proof Fast Evaluation thereof.
The inventive method is used for simulating the soil corrosion process of metal material under different soils environment, there is simulation, acceleration and reappearance, may be used for the corrosion behavior of research material in different soils environment and rule, can also be used for various material Corrosion resistance can Fast Evaluation.
Accompanying drawing explanation
By the description to embodiment carried out below in conjunction with accompanying drawing, above-mentioned and/or other objects of the present invention and advantage will become apparent, wherein:
Fig. 1 is the schematic diagram of the accelerated corrosion test of simulated soil corrosion process according to an exemplary embodiment of the present invention.
Embodiment
More fully the present invention is described below with reference to accompanying drawings, shown in the drawings of exemplary embodiment, but, should be understood that, provide these drawings and Examples to be only used to clearly the present invention is described, and be not intended to limit the scope of the invention.On the contrary, provide these accompanying drawings to make the disclosure to be thoroughly with complete, and scope of the present invention will be conveyed to those skilled in the art fully.
Fig. 1 is the schematic diagram of the accelerated corrosion test of simulated soil corrosion process according to an exemplary embodiment of the present invention.In the test process of exemplary embodiment according to the present invention, first enter at test box 2 middle berth the soil (such as, testing soil) 3 that certain thickness prepares, is vertically placed into the soil in the long limit of sample 1 in 3 downwards, then by sample 2 above covered with soil 3.Finally test box 2 entirety is put into damp heat box, set probe temperature, humidity and test period, test.
The accelerated corrosion method of testing of simulated soil corrosion process of the present invention is described in more detail below in conjunction with exemplary embodiment of the present invention.
The accelerated corrosion method of testing of simulated soil corrosion process comprises the steps: (1) composition according to target soil according to an exemplary embodiment of the present invention, prepares test solution with salt and water; (2) with acid (such as, H
2sO
4, but be not limited thereto) or alkali (such as, NaOH, but be not limited thereto) pH value of described test solution is adjusted to test value, as simulated soil corrosion steeping medium; (3) zeyssatite as carrier is mixed with steeping medium, to prepare the testing soil substantially identical with target soil physicochemical property; (4) sample is placed in testing soil, test according to predetermined probe temperature, relative humidity and test period, wherein, the pH value of based target soil and the diatomaceous pH value used are to determine described test value, and the content of each component of based target soil determines the consumption of salt, water, zeyssatite and acid or alkali.
In the process of preparation test solution, first sample analysis is carried out to target soil, determine kind and the content of institute's saliferous in target soil, and the physicochemical property parameter such as the pH value of target soil.According to kind and the content of analyzing the salt determined, corresponding salt and water is utilized to be mixed with test solution.Wherein, salt can comprise NaCl, Na
2sO
4, NaHCO
3, NaNO
3, CaCl
2, MgSO
4, KNO
3or common salinity in other soil.Then acid (such as H is utilized
2sO
4) or alkali (such as NaOH) pH value of carrying out based target soil and the diatomaceous pH value that will use to determine the pH value of described test solution (namely, the pH value of described test solution is adjusted to and becomes certain corresponding relation with the pH value of target soil), to corrode steeping medium as simulated soil.Then, utilize zeyssatite as carrier, mixed by zeyssatite with steeping medium, thus obtain the testing soil substantially identical with the physicochemical property of target soil, wherein, the content of the salt in testing soil can be equal to or greater than the content of the salt in target soil.More particularly, usually, diatomaceous pH value is between 9-10, in alkalescence, pH value and the target soil of the testing soil obtained after mixing with zeyssatite to make steeping medium are close, can calculate the pH value determining required test solution according to the consumption of the pH value of diatomaceous pH value, target soil and zeyssatite and steeping medium.Above-mentioned computing method are known to those skilled in the art, therefore here no longer repeat.According to one embodiment of present invention, the ratio between the content of often kind of salt in testing soil and the content of salt corresponding in target soil is identical.Finally, then sample is placed in testing soil, tests according to the temperature set, humidity and cycle.
Method of testing of the present invention, effectively can simulate all soil of pH value between 3-11.According to one embodiment of present invention, in test, the pH value of target soil can between 4.5-4.7.
The parameters such as diatomaceous bulk density, specific surface area and order number can be substantially identical with the relevant parameter of target soil.According to one embodiment of present invention, diatomaceous bulk density can between 0.34-0.65g/cm, and specific surface area can between 40-65m/g, and order number scope can be 20-200 order.
According to exemplary embodiment of the present invention, the accelerated corrosion method of testing of simulated soil corrosion process also can comprise after (5) process step (4) gained sample, carries out corrosion weight loss, erosion profile and product analysis.
According to one embodiment of present invention, in the process utilizing testing soil to test sample, the scope of probe temperature can be-40-100 DEG C, and the scope of relative humidity can be 5-99%.
The accelerated corrosion method of testing of the simulated soil corrosion process according to exemplary embodiment of the present invention is illustrated in greater detail below with reference to concrete example.
According to one embodiment of present invention, establish a kind of simulation accelerated corrosion test method, the corrosion process of simulation steel under soil environment.Technical matters to be solved is that lab simulation accelerated corrosion test must meet simulation, acceleration and reappearance three pacing itemss, wherein it is crucial that meet simulation condition on the basis meeting acceleration and reappearance condition.
The chemical composition (wt%) of table 1 test material
It is modal ferrous materials Q235 that material used is tested in soil corrosion, and its main chemical compositions is in table 1.Sample is processed into by steel plate and is of a size of 50mm × 25mm × 5mm small sample, and with No. 600 sand paperings, degreaser oil removing is cleaned, and measures, weighs, and perform record after ethanol dehydration post-drying.But the present invention is not limited thereto, other embodiments of the invention also may be used for the soil corrosion situation of testing other material, and are also not limited to size that upper mask body mentions and treatment step to the processing mode of sample.
Carry out on-site soil to sample and bury test underground, with routine in contrast, wherein, testing location is the outdoor sports of random selecting, and test period is 1 year.According to this embodiment, test ground target soil be acid ground, there is higher water cut and salt content, leading ion content and pH value as shown in table 2.After sample takes out, process is carried out to sample and remove corrosion product, calculate corrosion weight loss and corrosion depth, carry out corrosion product analysis simultaneously.
Table 2 target soil leading ion content (g/L) and pH value
| Project | CaCl 2 | NaCl | Na 2SO 4 | MgSO 4﹒7H 2O | KNO 3 | NaHCO 3 | pH |
| Content | 0.0111 | 0.0468 | 0.0142 | 0.0197 | 0.0293 | 0.0151 | 4.65 |
Test material Q235 buries 1 year underground and takes out afterwards and carries out data processing in target soil, and within its year, corrosion rate is about 0.1mm/a, and main corrosion product is alpha-feooh, Fe
2o
3, Fe
3o
4.
With reference to above-mentioned test result, consider the physicochemical property of target soil, and affect the principal element of soil corrosion, adopt analogy method to carry out soil corrosion simulation test to material Q235.
Embodiment 1
Test material is above-mentioned Q235 steel, and according to the physicochemical property of this target soil, preparation 5Kg water cut is 40%, and pH value is between 4.5-4.7, and total salt content is the testing soil of target soil 3 times.
(1) each medicine (that is, salt) formulation content is as shown in table 3, is dissolved in 2L deionized water by these medicines, stirs.
The medicine amount of taking tested by table 3
With CaCl
2for example, the computing method of its test consumption are:
m（CaCl
2）=0.0111×5×60%×3=0.0999g。
Wherein, the content of each chemicals is for drying the amount of medicament surveyed when grinding is rear to be mixed with 50% deionized water by soil.In formula, 5 × 60%=3Kg represents that the soil of test carrying salinity is that 3Kg(corresponding 1:1 uses 3 water when leaching, and meets salinity constant); Take advantage of the multiple that 3 expressions are amplified.The test consumption of other salt medicine can calculate respectively according to similar method.
(2) because the pH value of selected zeyssatite own is between 8-10, in alkalescence.For obtaining the acid target soil of pH value between 4.5-4.7, with the concentrated sulphuric acid of 98%, the pH value of solution in (1) need be adjusted between 1.24-1.26.
(3) taking 3Kg order number is 200 object zeyssatite, and its bulk density is 0.42g/cm
3, 150 mesh screen residues are less than 14%.By solution later for adjusted to ph and zeyssatite Homogeneous phase mixing, preparation testing soil.
(4) long for Q235 sample limit is vertically imbedded in test box downwards, then by above sample covered with testing soil.Then, test box entirety is put into damp heat box, adjustment probe temperature is 40 DEG C, and relative humidity is 70%, and setting test period is 10 days.
(5) sample removes corrosion product after taking out, and calculates corrosion weight loss and corrosion depth, carries out corrosion product analysis simultaneously.
After having tested, carry out data processing to the test of this Simulated Soil, material Q235 main corrosion product is alpha-feooh, Fe
2o
3, Fe
3o
4, consistent with the corrosion product that actual soil buries sample underground.Within its year, corrosion rate is about 0.2mm/a, and actual soil corrosion accelerates 1 times.
Embodiment 2
Test material is above-mentioned Q235 steel, and according to the physicochemical property of this target soil, preparation 5Kg water cut is 40%, and pH value is between 4.5-4.7, and total salt content is the simulated soil of target soil 3 times.
(1) each compounding medicine content is as shown in table 4, is dissolved in 2L deionized water by these medicines, stirs.
The medicine amount of taking tested by table 4
(2) with the concentrated sulphuric acid of 98%, the pH value of solution in (1) is adjusted to 1.24-1.26.
(3) take 200 object zeyssatite 1.2Kg, its bulk density is 0.42g/cm
3, 150 mesh screen residues are less than 14%; Take 20-40 object zeyssatite 1.8Kg, its bulk density is 0.37g/cm
3, 150 mesh screen residues are less than 6%; By solution and two kinds of zeyssatite Homogeneous phase mixing, preparation testing soil.
(4) long for Q235 sample limit is vertically imbedded in test box downwards, then by above sample covered with testing soil.Test box entirety is put into damp heat box, and adjustment probe temperature is 40 DEG C, and relative humidity is 70%, and setting test period is 10 days.
(5) sample removes corrosion product after taking out, and calculates corrosion weight loss and corrosion depth, carries out corrosion product analysis simultaneously.
After having tested, carry out data processing to the test of this Simulated Soil, material Q235 main corrosion product is alpha-feooh, Fe
2o
3, Fe
3o
4, consistent with the corrosion product that actual soil buries sample underground.Within its year, corrosion rate is about 0.5mm/a, and actual soil corrosion accelerates 5 times.
Repeated test is carried out to embodiment, and carry out corrosion product analysis, bury test result and above-mentioned scene underground soil corrosion test result to contrast, analysis mode, acceleration and reappearance, result shows: the result of simulation accelerated soil corrosion test meets one or more in following effect relative to the soil corrosion test result of target soil:
(1) there is significant accelerated corrosion: 5 times can be reached, change with testing soil configuration variation, test condition and test period.
(2) main corrosion product is consistent with the main corrosion product of outdoor atmospheric exposure: primary product is alpha-feooh, Fe
2o
3, Fe
3o
4.
(3) repeated test shows to have good repeatability according to the method for testing of the embodiment of the present invention.
(4) applied range of the present invention, may be used for the soil corrosion research of material and corrosion proof Fast Evaluation thereof.
Therefore, utilize and can simulate the corrosion condition of steel under different soils environment according to the method for testing of the embodiment of the present invention, be similar to from laboratory accelerated corrosion test result and infer that actual soil buries the result of test underground, therefore there is higher actual application value.
Describe in detail the present invention with reference to specific embodiment, but, those skilled in the art are to be understood that, without departing from the spirit and scope of the present invention, can carry out various amendment in form and details and change to these embodiments, scope of the present invention is by claims and equivalents thereof.
Claims (8)
1. an accelerated corrosion method of testing for simulated soil corrosion process, the method comprises the steps:
(1) according to the composition of target soil, test solution is prepared with salt and water;
(2) with acid or alkali, the pH value of described test solution is adjusted to test value, as simulated soil corrosion steeping medium;
(3) zeyssatite as carrier is mixed with steeping medium, to prepare the testing soil substantially identical with target soil physicochemical property;
(4) sample is placed in testing soil, tests according to predetermined probe temperature, relative humidity and test period,
Wherein, the pH value of based target soil and the diatomaceous pH value used are to determine described test value, and the content of each component of based target soil determines the consumption of salt, water, zeyssatite and acid or alkali.
2. method of testing as claimed in claim 1, wherein, described acid comprises sulfuric acid, and described alkali comprises NaOH, and described salt comprises NaCl, Na
2sO
4, NaHCO
3, NaNO
3, CaCl
2, MgSO
4, KNO
3or common salinity in other soil.
3. method of testing as claimed in claim 1, described method of testing also comprises:
(5), after step (4) gained sample being processed, corrosion weight loss, erosion profile and product analysis is carried out.
4. method of testing as claimed in claim 1, wherein: described in step (3), the range of adjustment of the pH value of testing soil is 3-11.
5. method of testing as claimed in claim 1, wherein: described in step (3), diatomaceous bulk density is between 0.34-0.65g/cm, specific surface area is between 40-65m/g, and order number scope is 20-200 order.
6. method of testing as claimed in claim 1, wherein: the Range of measuring temp described in step (4) is-40-100 DEG C, the scope of relative humidity is 5-99%.
7. method of testing as claimed in claim 1, wherein, the salt content in testing soil is equal to or greater than the salt content in target soil.
8. method of testing as claimed in claim 1, wherein, the ratio between the content of often kind of salt in testing soil and the content of salt corresponding in target soil is identical.
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| CN108303367A (en) * | 2018-04-02 | 2018-07-20 | 国网江西省电力有限公司电力科学研究院 | The test device and method of the accelerated corrosion of metallic ground material and cathodic protection |
| CN109100289B (en) * | 2018-07-30 | 2021-01-26 | 贵州电网有限责任公司 | Method for establishing soil corrosion prediction model |
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| CN103115861A (en) * | 2012-12-26 | 2013-05-22 | 中国人民解放军63653部队 | Accelerated corrosion method under landfill condition |
| CN103076438A (en) * | 2013-01-09 | 2013-05-01 | 浙江省电力公司电力科学研究院 | Laboratory simulation method for studying soil corrosion property |
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