CN102680380A - Method for quickly detecting corrosion resistance of stainless steel BA (bright annealed) plate - Google Patents
Method for quickly detecting corrosion resistance of stainless steel BA (bright annealed) plate Download PDFInfo
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- CN102680380A CN102680380A CN2011100582348A CN201110058234A CN102680380A CN 102680380 A CN102680380 A CN 102680380A CN 2011100582348 A CN2011100582348 A CN 2011100582348A CN 201110058234 A CN201110058234 A CN 201110058234A CN 102680380 A CN102680380 A CN 102680380A
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Abstract
The invention relates to the field of metal materials and specifically relates to a method for quickly detecting the corrosion resistance of a stainless steel BA (bright annealed) plate. The method comprises the following steps: (1) dripping corrosive liquid respectively on different parts of the surface of the stainless steel BA plate; and (2) cleaning the corrosive liquid on the surface of the stainless steel BA plate, drying the surface and evaluating the corrosion condition, wherein the corrosive liquid contains HCl, NaCl and FeCl3; the molar concentration of HCl is 0.05-1.0 mol/L; the molar concentration ratio of HCl, NaCl and FeCl3 is 1:1.8-2.2:0.75-0.9; the corrosion time is respectively (0.1-0.15/MHCl)min, (0.2-0.3/MHCl)min, (0.7-0.8/MHCl)min, and (1-1.5/MHCl)min; and MHCl is the molar concentration of HCl. The method can be used for speeding up the simulation of a corrosion environment, and is fast and simple in operation, low in cost and fine in effect.
Description
Technical field
The present invention relates to metal material field, be specially the corrosion proof method of a kind of detection stainless steel BA plate.
Background technology
Stainless steel BA plate is also claimed stainless steel bright annealing plate, is that stainless steel after cold rolling is at pure H
2Or H
2And N
2Anneal a kind of stainless-steel cold-rolling product that is rich in added value that after skin-pass, obtains under mixed gas protected.For obtaining high-quality stainless steel BA plate, the corrosion resistant plate after the hot-roll annealing pickling need pass through the elimination of roughing corase grind and go up the surface imperfection that the operation band gets off, and avoids defective effect final products performances such as scuffing, oxygen are stung, line squama, local roughness.
Stainless steel BA plate has extremely low roughness and high surface gloss, simultaneously surperficial one deck as thin as a wafer and fine and close passivating film the corrosion stability of BA plate is played a crucial role.Just because of this, stainless steel BA plate more and more receives people's favor, has been widely used in fields such as kitchen appliance, automobile decoration, electronics and biological chemistry.Stainless steel BA plate in the market is main with 304BA and 430BA; Be mainly used in industries such as dish-washing machine, micro-wave oven, washing machine, elevator panel, mobile phone faceplate; Wherein dish-washing machine is because some corrosive media such as frequent contact acetic acid, salt are the highest relatively to the corrosion stability requirement of stainless steel BA plate.
Influencing the corrosion proof factor of stainless steel BA plate has a lot, like H in the degree of purity of protective atmosphere in the stove in the annealing process and the stove
2Dew point etc., stainless steel BA surface is caused the surface can not form fine and close protectiveness passivating film by slight oxidation during process abnormality, thereby influences the corrosion stability of stainless steel BA plate.And the stainless steel BA plate corrosion resistance of surface that these factors cause decline is difficult for discovering through naked eyes and microscope; At present also there is not a kind of method can estimate the corrosion stability of stainless steel BA plate quickly and accurately; And only by conventional stainless steel corrosion stability traditional detection method " stainless steel pitting potential measuring method " and " stainless steel ferric trichloride pitting corrosion test method "; But these two kinds of classic methods are applied in the corrosion proof detection of stainless steel BA plate certain limitation is arranged, traditional detection method and detection method of the present invention contrast see the following form 1.
Because the corrosion stability of stainless steel BA plate is to be determined by its surperficial one deck passivating film as thin as a wafer; So estimating its corrosion stability need be to stainless original BA surface; Traditional detection method is difficult to the corrosion stability of actual response stainless steel BA initial surface, shortcomings such as have the cost of equipment costliness simultaneously, process of the test is complicated, the sample preparation difficulty is big, the test period is long.The present invention reacts the corrosion stability on stainless steel BA plate surface truly through a kind of simple simulation accelerated corrosion test.
Summary of the invention
The object of the present invention is to provide a kind of have simulation, acceleration and reproducible caustic solution, be used for estimating fast the corrosion stability of stainless steel BA plate.
Technical scheme of the present invention is a kind of method of fast detecting stainless steel BA plate corrosion resistance, may further comprise the steps:
(1) different parts on stainless steel BA plate surface drips corrosive liquid respectively;
Described corrosive liquid contains HCl, NaCl and FeCl
3The HCl volumetric molar concentration is 0.05～1.0mol/L, and HCl, NaCl and FeCl
3Molar concentration rate be 1: 1.8～2.2: 0.75～0.9;
Etching time is respectively (0.1～0.15/M
HCl) min, (0.2～0.3/M
HCl) min, (0.7～0.8M
HCl) min, (1～1.5/M
HCl) min; M wherein
HClVolumetric molar concentration for HCl;
(2) clean the surperficial corrosive liquid of stainless steel BA plate and dry, estimate corrosion condition.
The standard of estimating corrosion condition is a mirror effect.The corrosion proof evaluation of stainless steel BA plate is to estimate according to the position number that corrosion takes place in the different etching times; Judge whether the test position corrosion takes place will see whether this position loses mirror effect; If the test position has obviously lost mirror effect in certain etching time, that just judges that corrosion has taken place at this position.
Preferred version is that the HCl volumetric molar concentration is 0.1～0.5mol/L in the described corrosive liquid.
HCl, NaCl and FeCl in the described corrosive liquid
3Molar concentration rate be 1: 2: 0.8.
Described etching time is respectively (0.125/M
HCl) min, (0.25/M
HCl) min, (0.75M
HCl) min, (1.25/M
HCl) min.
The present invention is a kind of accelerated corrosion test method of simulating environment for use, based on the actual corrosion environment of dish-washing machine, designs the corrosion proof etch recipe of a kind of evaluation stainless steel BA plate, comprises HCl, NaCl and FeCl in the prescription
3Three kinds of reagent, wherein uniform corrosion takes place as highly corrosive agents to stainless steel BA surface in HCl, destroys the glossy surface of stainless steel BA plate, and NaCl and FeCl
3Have the effect that promotes corrosion as weak mordant, for HCl Cl is provided simultaneously
-Ensure.
The present invention for the corrosion proof evaluation principle of stainless steel BA plate is: if at (0.125/M
HCl) in etch time of min, there is the obvious corrosion vestige in stainless steel BA surface, the corrosion stability of this BA plate is very poor so, the application of should not dispatching from the factory; If at (0.125/M
HCl) the not corrosion of interior stainless steel BA of min etch time surface, and at (0.25/M
HCl) there is obvious corrosion on the BA surface in the min etch time, the corrosion stability of this BA plate is relatively poor so, optionally is applied in corrosivity more weak decoration industry relatively; If at (0.25/M
HCl) not obviously corrosion and at (0.75/M in the min
HCl) obvious corrosion arranging in the min etch time, this stainless steel BA plate corrosion stability is better so, optionally on the stronger dish-washing machine of corrosivity, uses; If (1.25/M
HCl) not obviously corrosion in etch time of min, the corrosion stability of this BA plate is splendid so, can satisfy the purposes of kitchen appliance.
Advantage of the present invention is:
(1) application of the present stainless steel BA plate of basis; Filter out the strongest dish-washing machine actual environment of corrosivity as simulated environment; Adopt test method of the present invention can quicken to simulate the corrosion environment of dish-washing machine, estimate the corrosion stability of stainless steel BA plate through the accelerated corrosion process of hundreds of times even thousands of times fast.
(2) corrosion stability of stainless steel BA plate is to be determined by its surperficial passivating film, and the present invention is through the accelerated corrosion test to stainless steel BA surface, but its corrosion stability in environment for use of actual response.
(3) the present invention is simple to operate, does not need higher level professional technology, the cost of equipment of conserve expensive, and evaluation result is intuitive and reliable, favorable reproducibility.
(4) the present invention to the difference that stainless steel BA plate corrosion stability requires, evaluates the corrosion stability grade of stainless steel BA plate according to the different application field, can be used as user's fast detecting means.Simultaneously, in the manufacturing enterprise of stainless steel BA plate, can be used to follow the trail of fast the unusual of production technology.
Table 1 is seen in the contrast of the present invention and prior art.
The contrast of table 1 stainless steel BA plate corrosion stability tradition evaluation method and the inventive method
Embodiment
Experimental technique is: the stainless steel BA plate that will cover film is cut into the sample that is of a size of 50mm * 100mm, and the duck eye that it is 10mm that the every side by side interval 10mm of adhesive tape cuts four diameters successively tears the surperficial overlay film of BA plate off, and the adhesive tape that shears is bonded on the BA plate surface, and is for use.
At room temperature, draw testing liquid, drip several testing liquids earlier in the 4th hole, treat (0.5/M with dropper
HCl) drip several testing liquids again in the 3rd hole behind the min, cross (0.5/M
HCl) drip several testing liquids behind the min in second hole, after (0.125/M
HCl) dripping several testing liquids behind the min in first hole, the testing liquid that drops in each duck eye the inside should evenly cover on the stainless steel BA surface of exposing, and crosses (0.125/M again
HCl) behind the min,,, use drier at last up to test position noresidue etchant solution with flowing water irrigation tests model.
The 430BA plate of existing 5 kinds of different bright annealing explained hereafter and the 304BA plate of 5 kinds of different bright annealing explained hereafter; This batch stainless steel BA plate is to produce in dew point when fluctuation of hydrogen shield atmosphere in the bright annealing process; The surface of stainless steel BA plate is because the unusual slight oxidation that taken place of dew point; But with the naked eye can't distinguish these BA plates, its corrosion proof difference can't be estimated especially fast.Detect this 10 kinds of corrosion proof differences of stainless steel BA plate and rating through embodiment 1～embodiment 5 below; Simultaneously these 10 models are measured the pitting potential on original BA surface and measured the pitch corrosion speed of original BA plate according to GB/T 17897-1999 according to GB/T17899-1999, and classic method and the inventive method are compared analysis.
Embodiment 1
(1) prepare sample: the 304BA plate of 430BA plate and 3 kinds of different bright annealing explained hereafter of getting 3 kinds of different bright annealing explained hereafter respectively is as test piece, and size of sample is 50mm * 100mm; The duck eye that it is 10mm that the every side by side interval 10mm of adhesive tape cuts four diameters successively; Be that 4 duck eyes that diameter is 10mm are side by side arranged on the adhesive tape, duck eye is 10mm at interval.Tear the overlay film on BA plate surface off, the adhesive tape that shears is bonded on the BA plate surface, for use.
(2) configuration corrosive liquid: HCl concentration 0.05mol/L wherein, NaCl concentration 0.1mol/L, FeCl
3Concentration 0.04mol/L (M
HCl=0.05mol/L, M
NaCl=0.1mol/L, M
FeCl3=0.04mol/L).
(3) titration corrosion process: ready model is lain on the testing table; Draw testing liquid with dropper; Earlier in the 4th duck eye, splash into several corrosive liquids, in the 3rd duck eye, splash into several corrosive liquids behind the 10min excessively, after in the 2nd duck eye, splashing into several corrosive liquids behind the 10min; Behind 2.5min, splash into several corrosive liquids at the 1st duck eye; The amount that splashes into corrosive liquid covers till the BA surface that duck eye exposes with corrosive liquid fully, cleans the model corrosion locations till no corrosive liquid is residual with a large amount of flowing water after crossing 2.5min at last, with hair-dryer drying corrosion location; 4 corrosion location accumulative total etching times to be evaluated like this are followed successively by: 2.5min, 5min, 15min, 25min promptly are followed successively by (0.125/M
HCl) min, (0.25/M
HCl) min, (0.75/M
HCl) min, (1.25/M
HCl) min.Whether stainless steel BA surface obvious corrosion has taken place as estimating its corrosion proof foundation in the different etch time.
(4) evaluation procedure: will test the dry model in back light preferably the place through visual inspection; If the BA surface in the test duck eye is compared with initial surface and is obviously lost mirror effect; Judge that then corrosion has taken place at this test position; If obviously difference is compared not at the test position with initial surface, does not then corrode at this test position of judgement.Evaluate the corrosion stability grade of this stainless steel BA plate at last through the duck eye number that corrosion takes place in the different etching times, table 2 is seen in the evaluation result comparative analysis of the test findings of classic method and the inventive method.
Table 2 embodiment 1 and the result of classic method contrast
Embodiment 2
(1) prepare sample: the 304BA plate of 430BA plate and 3 kinds of different bright annealing explained hereafter of getting 3 kinds of different bright annealing explained hereafter respectively is as test piece, and the test piece set-up procedure is with embodiment 1.
(2) configuration corrosive liquid: HCl concentration 0.1mol/L wherein, NaCl concentration 0.2mol/L, FeCl
3Concentration 0.08mol/L (M
HCl=0.1mol/L, M
NaCl=0.2mol/L, M
FeCl3=0.08mol/L).
(3) titration corrosion process: ready model is lain on the testing table; Draw testing liquid with dropper; Earlier in the 4th duck eye, splash into several corrosive liquids; In the 3rd duck eye, splash into several corrosive liquids after crossing 5min,, behind 1.25min, splash into several corrosive liquids at the 1st duck eye after in the 2nd duck eye, splashing into several corrosive liquids behind the 5min; Cross at last behind the 1.25min with flowing water washing test model corrosion location and dry, 4 corrosion locations accumulative total etching times to be evaluated like this are followed successively by: 1.25min, 2.5min, 7.5min, 12.5min.Whether stainless steel BA surface obvious corrosion has taken place as estimating its corrosion proof foundation in the different etch time.
(4) evaluation procedure: the corrosion stability assessment method of the stainless steel BA plate after the test is with embodiment 1, and table 3 is seen in the evaluation result comparative analysis of the test findings of classic method and the inventive method.
Table 3 embodiment 2 and the result of classic method contrast
Embodiment 3
(1) prepare sample: the 304BA plate of 430BA plate and 5 kinds of different bright annealing explained hereafter of getting 5 kinds of different bright annealing explained hereafter respectively is as test piece, and the test piece set-up procedure is with embodiment 1.
(2) configuration corrosive liquid: HCl concentration 0.25mol/L wherein, NaCl concentration 0.5mol/L, FeCl
3Concentration 0.2mol/L (M
HCl=0.25mol/L, M
NaCl=0.5mol/L, M
FeCl3=0.2mol/L).
(3) titration corrosion process: ready model is lain on the testing table; Draw testing liquid with dropper; Earlier in the 4th duck eye, splash into several corrosive liquids; In the 3rd duck eye, splash into several corrosive liquids after crossing 2min,, behind 0.5min, splash into several corrosive liquids at the 1st duck eye after in the 2nd duck eye, splashing into several corrosive liquids behind the 2min; Cross 0.5min at last with flowing water washing test model corrosion location and dry, 4 corrosion location accumulative total etching times to be evaluated like this are followed successively by: 0.5min, 1min, 3min, 5min.Whether stainless steel BA surface obvious corrosion has taken place as estimating its corrosion proof foundation in the different etch time.
(4) evaluation procedure: the corrosion stability assessment method of the stainless steel BA plate after the test is with embodiment 1, and table 4 is seen in the evaluation result comparative analysis of the test findings of classic method and the inventive method.
Table 4 embodiment 3 and the result of classic method contrast
Embodiment 4
(1) prepare sample: the 304BA plate of 430BA plate and 3 kinds of different bright annealing explained hereafter of getting 3 kinds of different bright annealing explained hereafter respectively is as test piece, and the test piece set-up procedure is with embodiment 1.
(2) configuration corrosive liquid: HCl concentration 0.5mol/L wherein, NaCl concentration 1.0mol/L, FeCl
3Concentration 0.4mol/L (M
HCl=0.5mol/L, M
NaCl=1.0mol/L, M
FeCl3=0.4mol/L).
(3) titration corrosion process: ready model is lain on the testing table; Draw testing liquid with dropper; Earlier in the 4th duck eye, splash into several corrosive liquids; In the 3rd duck eye, splash into several corrosive liquids after crossing 1min,, behind 0.25min, splash into several corrosive liquids at the 1st duck eye after in the 2nd duck eye, splashing into several corrosive liquids behind the 1min; Cross 0.25min at last and clean model corrosion location and dry with flowing water, 4 corrosion location accumulative total etching times to be evaluated like this are followed successively by: 0.25min, 0.5min, 1.5min, 2.5min.Whether stainless steel BA surface obvious corrosion has taken place as estimating its corrosion proof foundation in the different etch time.
(4) evaluation procedure: the corrosion stability assessment method of the stainless steel BA plate after the test is with embodiment 1, and table 5 is seen in the evaluation result comparative analysis of the test findings of classic method and the inventive method.
Table 5 embodiment 4 and the result of classic method contrast
Embodiment 5
(1) prepare sample: the 304BA plate of 430BA plate and 3 kinds of different bright annealing explained hereafter of getting 3 kinds of different bright annealing explained hereafter respectively is as test piece, and the test piece set-up procedure is with embodiment 1.
(2) dispose wherein HCl concentration 1.0mol/L of testing liquid, NaCl concentration 2.0mol/L, FeCl
3Concentration 0.8mol/L (M
HCl=1.0mol/L, M
NaCl=2.0mol/L, M
FeCl3=0.8mol/L).
(3) titration corrosion process: ready model is lain on the testing table; Draw corrosive liquid with dropper; Earlier in the 4th duck eye, splash into several corrosive liquids; In the 3rd duck eye, splash into several corrosive liquids after crossing 0.5min,, behind 0.125min, splash into several corrosive liquids at the 1st duck eye after in the 2nd duck eye, splashing into several corrosive liquids behind the 0.5min; Cross 0.125min at last and clean model corrosion location and dry with flowing water, 4 corrosion location accumulative total etching times to be evaluated like this are followed successively by: 0.125min, 0.25min, 0.75min, 1.25min.Whether stainless steel BA surface obvious corrosion has taken place as estimating its corrosion proof foundation in the different etch time.
(4) evaluation procedure: the corrosion stability assessment method of the stainless steel BA plate after the test is with embodiment 1, and table 6 is seen in the evaluation result comparative analysis of the test findings of classic method and the inventive method.
Table 6 embodiment 5 and the result of classic method contrast
Comprehensive embodiment 1～5 can find out that the volumetric molar concentration of HCl is more suitable at 0.05～1.0mol/L in the corrosion liquid formula of the present invention.Volumetric molar concentration M as HCl
HClDuring＜0.05mol/L, the longest position of etching time needs (1.25/M in 4 test positions
HCl) min＞25min, the time that the corrosion proof evaluation of such 1 stainless steel BA plate needs will substantially exceed 25min, and detection efficiency seriously is affected; And as the volumetric molar concentration M of HCl
HClDuring＞1.0mol/L, the shortest position of etching time needs (0.125/M in 4 test positions
HCl) min＜0.125min=7.5s, test period is too short, adds inevitable personal error in the process of the test, will influence the accuracy that stainless steel BA plate corrosion stability is estimated.So the accuracy of comprehensive detection efficient and evaluation of result considers that the prescription in the preferred embodiment 3 is best.
Claims (5)
1. the method for a fast detecting stainless steel BA plate corrosion resistance is characterized in that, may further comprise the steps:
(1) different parts on stainless steel BA plate surface drips corrosive liquid respectively;
Described corrosive liquid contains HCl, NaCl and FeCl
3The HCl volumetric molar concentration is 0.05～1.0mol/L, and HCl, NaCl and FeCl
3Molar concentration rate be 1: 1.8～2.2: 0.75～0.9;
Etching time is respectively (0.1～0.15/M
HCl) min, (0.2～0.3/M
HCl) min, (0.7～0.8M
HCl) min, (1～1.5/M
HCl) min; M wherein
HClVolumetric molar concentration for HCl;
(2) clean the surperficial corrosive liquid of stainless steel BA plate and dry, estimate corrosion condition.
2. the method for the said a kind of fast detecting stainless steel BA plate corrosion resistance of claim 1 is characterized in that the HCl volumetric molar concentration is 0.1～0.5mol/L in the described corrosive liquid.
3. the method for claim 1 or 2 said a kind of fast detecting stainless steel BA plate corrosion resistances is characterized in that HCl, NaCl and FeCl in the described corrosive liquid
3Molar concentration rate be 1: 2: 0.8.
4. the method for the said a kind of fast detecting stainless steel BA plate corrosion resistance of claim 1 is characterized in that described etching time is respectively (0.125/M
HCl) min, (0.25/M
HCl) min, (0.75M
HCl) min, (1.25/M
HCl) min.
5. the method for the said a kind of fast detecting stainless steel BA plate corrosion resistance of claim 1 is characterized in that the standard of said evaluation corrosion condition is a mirror effect.
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| CN201110058234.8A CN102680380B (en) | 2011-03-10 | 2011-03-10 | Method for quickly detecting corrosion resistance of stainless steel BA (bright annealed) plate |
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| CN105929011A (en) * | 2016-04-29 | 2016-09-07 | 河海大学常州校区 | Corrosive pitting detection method for intergranular corrosion of stainless steel |
| CN109187322A (en) * | 2018-08-31 | 2019-01-11 | 南京钢铁股份有限公司 | A kind of Evaluation of Corrosion Resistance method of polar ocean environment low-alloy steel |
| CN113252543A (en) * | 2021-05-13 | 2021-08-13 | 中国海洋石油集团有限公司 | Rapid screening and evaluation method for corrosion resistance of stainless steel material |
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| CN113252543A (en) * | 2021-05-13 | 2021-08-13 | 中国海洋石油集团有限公司 | Rapid screening and evaluation method for corrosion resistance of stainless steel material |
| CN113252543B (en) * | 2021-05-13 | 2023-01-17 | 中国海洋石油集团有限公司 | Rapid screening and evaluation method for corrosion resistance of stainless steel material |
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|---|---|
| CN102680380B (en) | 2014-07-09 |
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