CN110160944A - A kind of evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property - Google Patents
A kind of evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property Download PDFInfo
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- CN110160944A CN110160944A CN201910405317.6A CN201910405317A CN110160944A CN 110160944 A CN110160944 A CN 110160944A CN 201910405317 A CN201910405317 A CN 201910405317A CN 110160944 A CN110160944 A CN 110160944A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 230000007799 dermal corrosion Effects 0.000 title claims abstract description 20
- 231100000108 skin corrosion Toxicity 0.000 title claims abstract description 20
- 238000011156 evaluation Methods 0.000 title claims abstract description 18
- 238000010301 surface-oxidation reaction Methods 0.000 title claims abstract description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 65
- 238000005260 corrosion Methods 0.000 claims abstract description 65
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 13
- 239000011780 sodium chloride Substances 0.000 claims abstract description 7
- 239000003086 colorant Substances 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims description 13
- 238000005303 weighing Methods 0.000 claims description 9
- 206010024728 Lividity Diseases 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 210000003491 skin Anatomy 0.000 description 23
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
- 238000010186 staining Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000003860 storage Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 230000004584 weight gain Effects 0.000 description 3
- 235000019786 weight gain Nutrition 0.000 description 3
- 229910001204 A36 steel Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 210000002615 epidermis Anatomy 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000611 regression analysis Methods 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 206010027146 Melanoderma Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a kind of evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property, step includes: that (1) selection surface has the hot rolled steel plate of different colours oxide skin to be cut, and obtains sample, keeps surface scale not to be destroyed in cutting process；(2) intermittently sample is immersed in sodium chloride solution and carries out surrosion, or sample is placed under hygrothermal environment and carries out surrosion, taken pictures, weigh later, take pictures, weigh before be dried；(3) corroded area speedup and rate of gain two indices are chosen and the relationship of time evaluates hot rolled steel plate surface oxidation skin corrosion resistance respectively, corroded area speedup is bigger, then corrosion resistance is small, and corroded area speedup is smaller, then corrosion resistance is big；Rate of gain is bigger, then corrosion resistance is small, and rate of gain is smaller, then corrosion resistance is big.The present invention can Fast Evaluation oxide skin corrosion resistance；Can indoors in simulated atmosphere and rough seas hot rolled steel plate corrosion resistance.
Description
Technical field
The present invention relates to steel method for testing performance, in particular to a kind of hot rolled steel plate surface oxidation skin corrosion resisting property is commented
Valence method.
Background technique
Hot rolled steel plate will often undergo the storage of a period of time and the process of logistics from dispatching from the factory to applying, during this period due to
Steel plate is exposed in atmospheric environment even harsh ocean atmospheric environment, and different degrees of corrosion may occur for hot rolled steel plate, directly
The delivery quality for affecting steel is connect, and the surface quality of hot rolled plate, strip and its corrosion resistance are always to measure plate quality
Importance, directly affect appearance and quality stability of the steel plate during storage and transport, and how Fast Evaluation heat
The corrosion resistance of rolled steel plate surface scale just becomes steel rolling expert, corrosion scholar and logistics management person's question of common concern,
And there is presently no the detections and evaluation method that are directed to hot rolled steel plate surface oxidation skin corrosion resistance.
Summary of the invention
Goal of the invention: it is an object of the present invention to provide a kind of under severe atmosphere and marine environment quickly, controllably evaluates
The method of hot rolled steel plate surface oxidation skin corrosion resisting property.
Technical solution: the present invention provides a kind of evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property, including as follows
Step:
(1) sample prepares: choosing surface has the hot rolled steel plate of different colours oxide skin to be cut, and obtains sample, cuts
Surface scale is kept not to be destroyed in the process；
(2) surrosion is handled: intermittently sample being immersed in sodium chloride solution and carries out surrosion, or sample is put
Carry out surrosion under hygrothermal environment, take pictures, weigh later, take pictures, weigh before be dried；
(3) result judgement: choosing corroded area speedup and rate of gain two indices and the relationship of time evaluates heat respectively
Rolled steel plate surface scale corrosion resistance, corroded area speedup is bigger, then corrosion resistance is small, and corroded area speedup is smaller, then resistance to
Corrosivity is big；Rate of gain is bigger, then corrosion resistance is small, and rate of gain is smaller, then corrosion resistance is big.
The present invention is using the hot rolled steel plate with different colours oxide skin as test material, in the controllable constant temperature of temperature, humidity
In constant humidity cabinet, Fast Evaluation is made to corrosion resistance of the hot-rolled steel in different simulating atmospheric environments.
Further, different colours oxide skin includes red, lividity oxide skin in the step (1).The step (2)
Sample is lifted after middle immersion 3s, per for 24 hours or 48h takes pictures, in order to keep the continuity of corrosion process as far as possible, every 48h
It weighs.Sample was put into sodium chloride solution in every 5 days and impregnates 3s.In the step (2) under hygrothermal environment, to observe initial stage
The Behavior law of corrosion, first 3 days every 12h weighing, take pictures, later every weighing, take pictures for 24 hours.The back of step (1) sample
Face and side sealing.Hygrothermal environment in the step (2) is provided by dedicated experimental provision, and the experimental provision is by constant temperature perseverance
Wet tank automatically controls lifting platform, corrosion test chamber composition.Wherein, climatic chamber provides the warm and humid of simulated marine atmosphere corrosion
Spend environment, and settable series of temperature and damp condition；Automatically controlling lifting platform periodically can be soaked in corruption for hot rolled steel plate
In simulated solution in corrosion test case, the corrosion behavior of oxide skin under rough seas is simulated；Corrosion test chamber is packed into chlorination
Sodium solution, for simulating rough seas.
Evaluation principle of the invention are as follows: impregnated in certain salt water and after the damp and hot time, observe the corrosion of scale surface
Position and rusty scale pattern calculate the size and corroded area speedup (incrementss of corroded area under certain time) of rust staining；
The time that rust staining occurs is more early, and corrosion area accounting is bigger, and the protective effect of hot rolled steel plate surface oxidation skin is poorer, and corrosion resistance is got over
Difference.Meanwhile with the corrosion resistance of the surrosion rate determination oxide skin of hot rolled steel plate under certain wet heat condition, the corrosion increases
Weight curve is obtained via such as under type:
The surrosion (at least three groups of data) for calculating hot rolled steel plate under certain wet heat condition first, with the damp and hot time
Increase and the variation of wet heat condition, the weight of hot rolled steel plate increase according to certain rule.In general, the corruption of hot rolled steel plate
Erosion weight gain with exposure duration meet Δ W=Dt " Bending influence, wherein Δ W be unit area surrosion (mg/cm2), t
For the damp heat test time (h), D is constant, represents initial corrosion degree, n related with material surface chemistries and environmental factor
For constant, Corrosion developing trend is represented, is changed with oxide skin compactness, corrosion resistance and environment difference.When n > 1, corrosion is indicated
Rate is in the gesture of acceleration at any time, shows that the corrosion resistance of oxide skin is poor；When n=1, indicate that surrosion is in line substantially at any time
Property increase, i.e. corrosion rate keeps substantially constant, and oxide skin corrosion resistance is also poor；When n < 1, indicate that corrosion rate is at any time
The trend that parabolic gradually decreases, oxide skin corrosion resistance are preferable.
The utility model has the advantages that the present invention has the advantages that Fast Evaluation oxide skin is corrosion proof；It can the more different oxidations of quantitative assessment
The corrosion resistance size of skin；Can indoors in simulated atmosphere and rough seas hot rolled steel plate corrosion resistance, study hot-rolled steel table
Correlation of the face quality (the especially composition of surface scale, structure and defect) with its atmospheric corrosion performance；Hot rolling can be passed through
The development at any time of surface of steel plate rust staining size and weight gain curve carry out its corrosion resistance under analog storage environment of Fast Evaluation
And the resting period, foundation is provided for the hot rolled steel plate storage time specification in different environments of different surfaces quality.
Detailed description of the invention
Fig. 1 is A36 and X65 steel red oxidization skin steel plate of the present invention relative humidity is 95%, temperature is 25 DEG C and 35 DEG C
Surrosion relationship.
Specific embodiment
The present invention is generally (50-200) mm × (25-100) mm using the size of hot rolled steel plate, and the size of the present embodiment is
100mm×50mm.Cutting process does not destroy surface scale state as far as possible, and sample is sealed the back side and side using 704 silica gel.
The hot rolled steel plate of every kind of oxide skin state chooses 3 samples, and the half of one of sample is soaked in 3.5% sodium chloride solution
3s carried out same salt water immersion treatment to the sample every 5 days, simulates the hot rolled plate corrosion behavior under severe storage condition,
And the rule of chloride ion influence lower surface corrosion variation is compared on same sample, the test period is 15 days.For oxygen
Change the evaluation of skin corrosion resisting property by the way of periodically taking pictures, weighing, the variation of observation rust staining erosion profile and corrosion area are at any time
Between variation, per for 24 hours or 48h to sample corrosion situation take pictures, every 48h weighs to sample, every time weighing before will examination
Sample drying.Determine oxide skin to the protectiveness of matrix hot rolled steel plate by the relationship of sample surrosion at any time.
By taking X65 pipe line steel and A36 ship steel as an example, specific oxide skin state and processing mode are shown in Table 1.It is selected in this experiment
Selecting hot-rolled steel specimen size is 100mm x 50mm x 3mm, photographs to record the variation of corrosion initial stage macro morphology every 12h within first 3 days
And weigh, it is hereafter photographed to record every for 24 hours, observes it in detail and corrode the trend that area changes over time and weighing.It is all
Sample is all dried up with hair dryer before taking pictures, weighing, and is weighed sample surrosion with assay balance, is accurate to 0.1mg.
1 experimental material of table and number
Damp heat test is 95% in relative humidity, and temperature carries out under the conditions of being 25 DEG C and 35 DEG C, every during damp heat test
Kind every kind of state of material chooses 3 parallel samples, wherein 2 groups of carry out standard damp heat tests, another kind simulation chloride ion sprays shape
Damp heat test under state, and salt water immersion treatment is carried out to sample half every 5 days.At first 3 days of damp heat test every 12h
Drying weighing is taken pictures, and extends time interval later to for 24 hours, and wherein sample weighs 3 times every time, and weight gain data are averaged conduct
Measurement data.
For red and lividity oxide skin X65 pipeline steel curved beam, by observation rusty surface pattern and rust staining is calculated
Size determines under 25 DEG C, 95% humidity, the corrosion tendency under general room atmosphere and severe storage condition.From difference
It is lighter without SS saline soaked specimen surface corrosion behavior from the point of view of macro morphology after time corrosion, just lack after damp and hot 36h
Blackspot is measured, over time, corrosion behavior gradually increases, and a large amount of yellowish-brown rust staining occurs in specimen surface when 360h, and
And corrosion area gradually increases, the half sample of salt water is impregnated in comparison, and specimen surface corrosion area is larger, and yellowish-brown rust staining is special
Obviously；The corrosion of the pipe line steel of contrast attenation factor's red skin and lividity epidermis, it may be observed that lividity epidermis corrosion resistance is obviously high
In red skin, corrosion area is smaller, and corrosion expansion trend is little, can obviously slow down corrosion.According to yellowish-brown rust staining area
Size and the extension tendency of rust staining judge the corrosion resistance of oxide skin, it is known that the difference of surface scale and whether there is or not chlorine from
Under son effect, the corrosion proof influence on hot rolled steel plate, the hot rolled steel plate corrosion resistance sequence of this four groups of difference oxide skin states are as follows:
G > H > E > F.
The surrosion curve of various sample has been monitored simultaneously, as shown in Figure 1.It is evaluated with the surrosion rate of oxide skin
The corrosion resistance of different surfaces state oxide skin.Hot rolled steel plate unit area surrosion Δ W and the relationship of time meet Δ W=
Dtn, D is constant, represents initial corrosion degree, and n is constant, represents Corrosion developing trend.Fig. 1 provides A, E in relative humidity
95%, temperature is respectively the relationship of 25 DEG C, 35 DEG C of surrosions and time after regression analysis.Specific condition, parameter are such as
Table 2:
2 experiment condition of table and number
| Experiment condition | D | n | R2 |
| A36 (25 DEG C/RH=95%) | 0.0025 | 0.7643 | 0.9932 |
| X65 (25 DEG C/RH=95%) | 0.0109 | 0.8049 | 0.9848 |
| A36 (35 DEG C/RH=95%) | 0.0052 | 0.9072 | 0.9878 |
| X65 (35 DEG C/RH=95%) | 0.0141 | 0.9444 | 0.9921 |
Through regression analysis it is found that the n value of the A36 steel under the same terms is always less than X65 steel, and D value is smaller, shows A36 steel
Red oxidization skin corrosion resistance is better than X65 steel red oxidization skin；And for steel of the same race, temperature is higher, and n value is bigger.
Claims (6)
1. a kind of evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property, characterized by the following steps:
(1) sample prepares: choosing surface has the hot rolled steel plate of different colours oxide skin to be cut, and obtains sample, cutting process
Middle holding surface scale is not destroyed；
(2) surrosion is handled: intermittently sample being immersed in sodium chloride solution and carries out surrosion, or sample is placed on wet
Carry out surrosion under thermal environment, take pictures, weigh later, take pictures, weigh before be dried；
(3) result judgement: choosing corroded area speedup and rate of gain two indices and the relationship of time evaluates hot-rolled steel respectively
Plate surface oxide skin corrosion resistance, corroded area speedup is bigger, then corrosion resistance is small, and corroded area speedup is smaller, then corrosion-resistant
Property is big；Rate of gain is bigger, then corrosion resistance is small, and rate of gain is smaller, then corrosion resistance is big.
2. the evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property according to claim 1, it is characterised in that: described
Different colours oxide skin includes red, lividity oxide skin in step (1).
3. the evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property according to claim 1, it is characterised in that: described
It impregnates in step (2) after starting per for 24 hours or 48h takes pictures, weighs every 48h, it is molten sample to be put into sodium chloride in every 5 days
3s is impregnated in liquid.
4. the evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property according to claim 1, it is characterised in that: described
In step (2) under hygrothermal environment first 3 days every 12h weighing, take pictures, later every weighing, take pictures for 24 hours.
5. the evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property according to claim 1, it is characterised in that: described
The back side of step (1) sample and side sealing..
6. the evaluation method of hot rolled steel plate surface oxidation skin corrosion resisting property according to claim 1, it is characterised in that: described
Hygrothermal environment in step (2) is provided by experimental provision, and the experimental provision is by climatic chamber, automatic control lifting platform, corruption
Corrosion test case is constituted.
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| CN113029921A (en) * | 2021-02-07 | 2021-06-25 | 首钢集团有限公司 | Method for evaluating blackening tendency of zinc-aluminum-magnesium coated steel plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461740A (en) * | 2020-11-13 | 2021-03-09 | 南京钢铁股份有限公司 | Salt spray evaluation method for protection capability of nano metal coating on surface of hot-rolled steel plate |
| CN113029921A (en) * | 2021-02-07 | 2021-06-25 | 首钢集团有限公司 | Method for evaluating blackening tendency of zinc-aluminum-magnesium coated steel plate |
| CN115219410A (en) * | 2022-07-20 | 2022-10-21 | 马鞍山钢铁股份有限公司 | Method for evaluating stabilization state of weathering steel rust layer and application thereof |
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