CN118639235A - Steel plate flash rust prevention agent and steel plate flash rust prevention treatment method - Google Patents
Steel plate flash rust prevention agent and steel plate flash rust prevention treatment method Download PDFInfo
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- CN118639235A CN118639235A CN202310233288.6A CN202310233288A CN118639235A CN 118639235 A CN118639235 A CN 118639235A CN 202310233288 A CN202310233288 A CN 202310233288A CN 118639235 A CN118639235 A CN 118639235A
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- steel plate
- flash rust
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 97
- 239000010959 steel Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000002265 prevention Effects 0.000 title claims abstract description 31
- 238000001035 drying Methods 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000126 substance Substances 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- -1 alcohol amine Chemical class 0.000 claims abstract description 7
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims abstract description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 6
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims abstract description 6
- 150000003852 triazoles Chemical class 0.000 claims abstract description 4
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 3
- 239000008367 deionised water Substances 0.000 claims abstract description 3
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 3
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims abstract description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 3
- 239000010452 phosphate Substances 0.000 claims abstract description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 3
- 239000010960 cold rolled steel Substances 0.000 claims description 75
- 239000003112 inhibitor Substances 0.000 claims description 30
- 238000000137 annealing Methods 0.000 claims description 24
- 238000005406 washing Methods 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 21
- 239000003513 alkali Substances 0.000 claims description 18
- 229910001868 water Inorganic materials 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000005868 electrolysis reaction Methods 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000005554 pickling Methods 0.000 claims description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 238000000053 physical method Methods 0.000 claims description 4
- 238000002310 reflectometry Methods 0.000 claims description 4
- 229910000954 Medium-carbon steel Inorganic materials 0.000 claims description 2
- 238000005422 blasting Methods 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims description 2
- 239000010731 rolling oil Substances 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 230000001681 protective effect Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000005764 inhibitory process Effects 0.000 description 5
- 239000002609 medium Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000536 complexating effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- AZUYLZMQTIKGSC-UHFFFAOYSA-N 1-[6-[4-(5-chloro-6-methyl-1H-indazol-4-yl)-5-methyl-3-(1-methylindazol-5-yl)pyrazol-1-yl]-2-azaspiro[3.3]heptan-2-yl]prop-2-en-1-one Chemical compound ClC=1C(=C2C=NNC2=CC=1C)C=1C(=NN(C=1C)C1CC2(CN(C2)C(C=C)=O)C1)C=1C=C2C=NN(C2=CC=1)C AZUYLZMQTIKGSC-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 238000006388 chemical passivation reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 150000004698 iron complex Chemical class 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a steel plate flash rust prevention agent and a steel plate flash rust prevention treatment method, which solve the technical problem that flash rust occurs on the surface of the existing steel plate after drying. The technical scheme is that the steel plate anti-flash rust agent comprises the following components in percentage by mass: 0.1 to 0.5 percent of triazole substances, 3 to 10 percent of dodecyl diacid, 0.2 to 1.5 percent of alcohol amine substances, 0.01 to 0.5 percent of dodecyl monoester phosphate, 0.5 to 2 percent of sodium bicarbonate and 0.5 to 2 percent of aluminum dihydrogen phosphate, and the balance of deionized water. The method adopts the last cleaning or leveling wading procedure before the finished product is prepared, adds the anti-flash rust agent into the solution, cleans the surface of the steel plate, produces the anti-rust protective film on the surface of the steel plate, and improves the corrosion resistance of the steel plate product.
Description
Technical Field
The invention relates to a steel plate flash rust inhibitor, in particular to a steel plate flash rust inhibitor and a steel plate flash rust inhibition treatment method, and specifically relates to a steel plate flash rust inhibitor and a method for carrying out flash rust inhibition treatment on a steel plate by using the same, belonging to the technical field of steel plate surface treatment.
Background
The iron and steel industry is an important basic industry of national economy, and has a vital role in the whole national economy. The surface rust protection treatment has been the core of interest to the skilled artisan during the production, processing and transportation of steel sheets. The coating rust-proof oil is commonly used for rust protection in the steel plate storage and transportation process, but aiming at the problems of steel plate flash rust and inter-procedure rust, the oiling treatment has no economical efficiency and effectiveness. The steel plate flash rust is characterized by quick steel plate output, namely regional corrosion, and corrosion usually occurs in the drying process after the steel plate wading treatment process. According to statistics, the economic loss caused by metal corrosion in China accounts for about 1.5-3.5% of the total national production value every year. Therefore, research on how to improve the flash rust resistance of a steel sheet has become a research hotspot for those skilled in the art.
The Chinese patent application document of application publication No. CN114907711A discloses a novel environment-friendly anti-flash rust agent with low price.
The Chinese patent application document of the application publication number patent CN114349951A discloses a flash rust inhibitor, and hydrophilic phosphate groups contained in the molecular structure of the flash rust inhibitor have phosphating and passivating effects on the metal surface, so that the flash rust phenomenon on the metal surface can be prevented.
The Chinese patent application document of application publication No. CN 113461948A discloses a flash rust inhibitor, the functional group of which can coordinate with the metal ion of the metal substrate to generate a stable complex, so that the flash rust inhibitor can be firmly adsorbed on the surface of the metal substrate to prevent oxygen from contacting with the metal substrate, and the metal ion, water and oxygen can be prevented from reacting on the surface of the metal substrate to form flash rust.
In summary, the prior art focuses on improving the flash rust resistance of steel plates by rust inhibitors, and lacks flash rust inhibitor application technology and steel plate flash treatment technology.
Disclosure of Invention
The invention aims to provide a steel plate flash rust prevention agent and a steel plate flash rust prevention treatment method, which solve the technical problem that the surface of the existing steel plate is subjected to flash rust after being dried; after the flash rust prevention agent is used for carrying out flash rust prevention treatment on the steel plate, the corrosion resistance of the steel plate is obviously improved, the continuous production and processing of the steel plate are ensured, and the corrosion loss of the steel plate is reduced.
The invention has the technical idea that under the condition of continuous plate and strip process equipment, in the last cleaning or leveling wading procedure based on steel processing, the anti-flash rust agent is added into the solution, so that the surface of the steel plate is cleaned, and meanwhile, the anti-rust protective film is produced on the surface of the steel plate, and the corrosion resistance of the steel plate is improved.
The invention adopts the technical scheme that the steel plate anti-flash rust agent comprises the following components in percentage by mass: 0.1 to 0.5 percent of triazole substances, 3 to 10 percent of dodecyl diacid, 0.2 to 1.5 percent of alcohol amine substances, 0.01 to 0.5 percent of dodecyl monoester phosphate, 0.5 to 2 percent of sodium bicarbonate and 0.5 to 2 percent of aluminum dihydrogen phosphate, and the balance of deionized water.
The concentration values of all the components of the flash rust inhibitor are proved by experimental design, and the single concentration of the components of the flash rust inhibitor is too high or too low, so that the competitive adsorption balance of all the substances is influenced, and the capability of complexing iron ions is synchronously influenced; the flash rust inhibitor has excellent flash rust resistance, and can play an optimal role in the aspects of pH value, wetting, residue and the like.
The flash rust prevention treatment method for the hot rolled steel plate by using the flash rust prevention agent comprises the following steps:
1) Removing iron scales on the surface of the hot-rolled steel plate, and removing the iron scales on the surface of the hot-rolled steel plate by a chemical method or a physical method, wherein the chemical method comprises the steps of pickling the hot-rolled steel plate by hydrochloric acid or sulfuric acid; the physical method comprises sand blasting and shot blasting;
2) Rinsing and anti-flash rust treatment are carried out on the hot rolled steel plate, and desalted water added with the anti-flash rust agent is used for spraying or soaking and washing the surface of the hot rolled steel plate, wherein the temperature of the desalted water is 20-70 ℃;
3) And (3) carrying out blowing drying on the hot-rolled steel plate, and carrying out blowing drying on the hot-rolled steel plate by hot air with the temperature of 80-120 ℃ to remove residual moisture on the surface of the hot-rolled steel plate so as to obtain the finished hot-rolled steel plate.
Further, the hot rolled steel plate is a hot rolled medium and low carbon steel plate with the thickness of 2.0-8.0 mm.
The finished hot rolled steel plate subjected to flash rust prevention treatment is placed in an environment with the humidity of 98RH percent and the temperature of 55 ℃ for 60-70 hours, the hot rolled steel plate is free from rust, the film resistance of the hot rolled steel plate is 6000-6500 Ω/cm 2, and the contact angle of the water medium of the hot rolled steel plate is 43-53 degrees.
The flash rust prevention treatment method for the cold rolled steel plate by using the flash rust prevention agent comprises the following steps:
1) Performing alkali washing on the cold-rolled steel sheet, and performing alkali washing on the cold-rolled steel sheet in a combined mode of spraying and electrolysis to remove rolling oil on the surface of the cold-rolled steel sheet;
2) Rinsing and drying the cold-rolled steel sheet, spraying and washing the cold-rolled steel sheet subjected to alkali washing by pure water, drying the washed cold-rolled steel sheet by hot air, and controlling the surface reflectivity of the cold-rolled steel sheet to be 80-100% after rinsing and drying;
3) Annealing the cold-rolled steel sheet, and carrying out annealing treatment on the cold-rolled steel sheet by using an annealing furnace, wherein the annealing temperature of the cold-rolled steel sheet in a soaking section of the continuous annealing furnace is 400-750 ℃, and the annealing time is 15-60 s;
4) The method comprises the steps of performing flash rust prevention treatment on a cold-rolled steel plate, adding a flash rust inhibitor into a solution of a last wading procedure before a finished product is prepared, and uniformly coating the flash rust inhibitor on the surface of the cold-rolled steel plate in a dipping or spraying mode, wherein the last wading procedure before the finished product is any one of a cleaning procedure and a leveling procedure;
5) And (3) carrying out purging drying on the cold-rolled steel sheet, and carrying out purging drying on the cold-rolled steel sheet by hot air with the temperature of 80-120 ℃ to remove residual moisture on the surface of the cold-rolled steel sheet, thereby obtaining the finished cold-rolled steel sheet.
Further, the cold-rolled steel sheet is a cold-rolled medium-low carbon steel sheet with the thickness of 0.15-0.80 mm.
The finished cold-rolled steel sheet subjected to flash rust prevention treatment is placed in an environment with humidity of 98RH and temperature of 55 ℃ for 60-70 hours, the cold-rolled steel sheet is rust-free, the film resistance of the cold-rolled steel sheet is 6000-6500 Ω/cm 2, and the contact angle of the water medium of the cold-rolled steel sheet is 43-53 degrees.
The flash rust prevention treatment method for the cold-rolled steel plate is based on the following steps;
The flash rust is a phenomenon that the surface of a steel plate or a steel workpiece is rusted in a short time in the drying process after the wading treatment process, and is characterized in that the flash rust is quick, cannot be protected by a drying process and oiling, and seriously affects the appearance quality of the material. The essence of flash rust was found to be that iron reacts with oxygen and water in a short period of time to form poorly soluble hydrous oxides (FeO x·nH2 0), a possible conversion process being: fe 0→Fe2+→Fe3+→FeOX. Therefore, to solve the flash rust problem, the conversion process is needed to be inhibited, firstly, the oxidation inhibition of Fe in the first step is realized through the introduction of an antirust substance, and the inhibition can be realized through three aspects of passivation film protection, precipitation film protection, adsorption film protection, and the like, and the triazole substance, the organic acid and the phosphoric monoester adopted by the invention have good inhibition effects; secondly, by introducing complexing substances, the oxidation and conversion of iron ions are blocked, so that newly generated Fe 2+ can be quickly complexed to form an iron complex, but not converted into simple hydrated oxides of iron, and EDTA, cyanide and the invention adopt the alcohol amine substances to have strong complexing effect with the iron ions.
The flash rust inhibitor component is designed and developed based on two basic principles, and the result shows that the flash rust inhibitor has good flash rust inhibition effect, meanwhile, in the aspect of the surface treatment method of the flash rust inhibitor, the prior process equipment is combined, the treatment process is not added separately, the flash rust inhibitor is added into the solution of the last wading process before the finished product is prepared, such as the last cleaning or flattening wading process, and the rust inhibitor is produced on the surface of the steel plate while the surface of the steel plate is cleaned, so that the corrosion resistance of the steel plate is improved.
Compared with the prior art, the invention has the following positive effects: 1. the anti-flash rust agent can improve the corrosion resistance of the steel plate, solve the problem of flash rust and simultaneously replace the oiling treatment partially. 2. According to the method, the flash rust inhibitor is added into the solution of the last wading procedure before the finished product is prepared, so that the flash rust inhibitor of the steel plate is improved and the flash rust inhibitor cost of the steel plate is reduced on the premise of not adding existing equipment and not changing the existing technological process.
Detailed Description
The invention is further illustrated below in connection with specific examples 1-3. The flash rust preventive agent of the embodiment of the invention comprises the following components in percentage by mass in table 1.
Table 1 the components, units, of the anti-flash rust agent of the present invention: mass percent.
Example 1a method for flash rust prevention treatment of a hot rolled steel sheet using the above-mentioned flash rust inhibitor, comprising the steps of:
1) Removing oxidized iron scales on the surface of the hot rolled steel plate, and pickling the hot rolled steel plate by using 40g/L hydrochloric acid as a pickling medium;
2) Rinsing and anti-flash rust treatment are carried out on the hot rolled steel plate, and desalted water added with the anti-flash rust agent is used for carrying out spray rinsing on the surface of the hot rolled steel plate after pickling, wherein the temperature of the desalted water is 20 ℃;
3) And (3) carrying out blowing drying on the hot-rolled steel plate, and carrying out blowing drying on the hot-rolled steel plate by hot air with the temperature of 50 ℃ to remove residual water on the surface of the hot-rolled steel plate.
Example 2 the method for treating cold rolled steel sheet with the above anti-flash rust agent comprises the following steps:
1) Performing alkali washing on the cold-rolled steel plate, immersing the steel plate in alkali liquor, and adopting a combined washing mode of spraying and electrolysis, wherein the alkali concentration is 10g/L, the alkali washing temperature is 40 ℃, the alkali washing time is 100s, and the current density of electrolysis is 5A/dm 2;
2) Rinsing and drying the cold-rolled steel sheet, spraying and washing the cold-rolled steel sheet subjected to alkali washing by pure water, drying the washed cold-rolled steel sheet by hot air, and controlling the surface reflectivity of the cold-rolled steel sheet to be 80-100% after rinsing and drying;
3) Annealing the cold-rolled steel sheet, and carrying out annealing treatment on the cold-rolled steel sheet by using an annealing furnace, wherein the annealing temperature of the cold-rolled steel sheet in a soaking section of the continuous annealing furnace is 400 ℃, and the annealing time is 15s;
4) Performing flash rust prevention treatment on the cold-rolled steel sheet, adding a flash rust inhibitor into a cleaning solution in a cleaning procedure, wherein the temperature of the cleaning solution is 20 ℃, and uniformly coating the flash rust inhibitor on the surface of the annealed cold-rolled steel sheet in a spraying manner;
5) And (3) carrying out purging drying on the cold-rolled steel sheet, and carrying out purging drying on the cold-rolled steel sheet by hot air with the temperature of 50 ℃ to remove residual moisture on the surface of the cold-rolled steel sheet.
Example 3A method for treating cold rolled steel sheet with the above anti-flash rust agent comprises the steps of:
1) Performing alkali washing on the cold-rolled steel plate, immersing the steel plate in alkali liquor, and adopting a combined washing mode of spraying and electrolysis, wherein the alkali concentration is 10g/L, the alkali washing temperature is 80 ℃, the alkali washing time is 100s, and the current density of electrolysis is 40A/dm 2;
2) Rinsing and drying the cold-rolled steel sheet, spraying and washing the cold-rolled steel sheet subjected to alkali washing by pure water, drying the washed cold-rolled steel sheet by hot air, and controlling the surface reflectivity of the cold-rolled steel sheet to be 80-100% after rinsing and drying;
3) Annealing the cold-rolled steel sheet, and carrying out annealing treatment on the cold-rolled steel sheet by using an annealing furnace, wherein the annealing temperature of the cold-rolled steel sheet in the soaking section of the continuous annealing furnace is 750 ℃, and the annealing time is 60s;
4) Performing flash rust prevention treatment on the cold-rolled steel sheet, adding a flash rust inhibitor into a cleaning solution in a cleaning procedure, wherein the temperature of the cleaning solution is 50 ℃, and uniformly coating the flash rust inhibitor on the surface of the annealed cold-rolled steel sheet in a spraying manner;
5) And (3) carrying out blowing drying on the cold-rolled steel sheet, and carrying out blowing drying on the cold-rolled steel sheet by hot air with the temperature of 130 ℃ to remove residual moisture on the surface of the cold-rolled steel sheet.
The steel plate subjected to flash rust prevention treatment is placed in an environment with the humidity of 98RH percent and the temperature of 55 ℃ for 60-70 hours, the steel plate is free from rust, the film resistance of the steel plate is 6000-6500 ohm/cm 2, and the water medium contact angle of the steel plate is 43-53 degrees. The steel sheet surface is shown in Table 2.
TABLE 2 surface Properties of Steel sheets according to examples of the invention
| Project | Contact angle of aqueous medium, ° | Film resistance, Ω/cm 2 | Time/h of damp-heat |
| The invention is that | 48±5 | 6000-6500 | 60-70 |
| Example 1 | 50-52 | 6118 | 63.4 |
| Example 2 | 48-51 | 6353 | 65.2 |
| Example 3 | 51-53 | 6479 | 69.8 |
As shown in Table 2, the steel plate treated by the method of the invention has high rust resistance and can effectively reduce the occurrence of flash rust phenomenon.
The above description is merely of a preferred embodiment of the present invention, and the present invention may be embodied in other than the above embodiment. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (7)
1. The steel plate flash rust inhibitor is characterized by comprising the following components in percentage by mass: 0.1 to 0.5 percent of triazole substances, 3 to 10 percent of dodecyl diacid, 0.2 to 1.5 percent of alcohol amine substances, 0.01 to 0.5 percent of dodecyl monoester phosphate, 0.5 to 2 percent of sodium bicarbonate and 0.5 to 2 percent of aluminum dihydrogen phosphate, and the balance of deionized water.
2. A method for treating flash rust prevention of a hot rolled steel plate, characterized by adopting the flash rust prevention agent as defined in claim 1, comprising the following steps:
1) Removing iron scales on the surface of the hot-rolled steel plate, and removing the iron scales on the surface of the hot-rolled steel plate by a chemical method or a physical method, wherein the chemical method comprises the steps of pickling the hot-rolled steel plate by hydrochloric acid or sulfuric acid; the physical method comprises sand blasting and shot blasting;
2) Rinsing and anti-flash rust treatment are carried out on the hot rolled steel plate, and desalted water added with the anti-flash rust agent is used for spraying or soaking and washing the surface of the hot rolled steel plate, wherein the temperature of the desalted water is 20-70 ℃;
3) And (3) carrying out blowing drying on the hot-rolled steel plate, and carrying out blowing drying on the hot-rolled steel plate by hot air with the temperature of 80-120 ℃ to remove residual moisture on the surface of the hot-rolled steel plate so as to obtain the finished hot-rolled steel plate.
3. The flash rust prevention method for a hot rolled steel sheet according to claim 2, wherein the hot rolled steel sheet is a hot rolled medium and low carbon steel sheet having a thickness of 2.0 to 8.0 mm.
4. The flash rust prevention treatment method for a hot rolled steel sheet according to claim 2, wherein the finished hot rolled steel sheet is placed in an environment with a humidity of 98RH% and a temperature of 55 ℃ for 60 to 70 hours, the hot rolled steel sheet is rust-free, the film resistance of the hot rolled steel sheet is 6000 to 6500 Ω/cm 2, and the contact angle of the water medium of the hot rolled steel sheet is 43 to 53 °.
5. A method for treating cold rolled steel sheet flash rust prevention, characterized in that the flash rust prevention agent of claim 1 is adopted, comprising the following steps:
1) Performing alkali washing on the cold-rolled steel sheet, and performing alkali washing on the cold-rolled steel sheet in a combined mode of spraying and electrolysis to remove rolling oil on the surface of the cold-rolled steel sheet;
2) Rinsing and drying the cold-rolled steel sheet, spraying and washing the cold-rolled steel sheet subjected to alkali washing by pure water, drying the washed cold-rolled steel sheet by hot air, and controlling the surface reflectivity of the cold-rolled steel sheet to be 80-100% after rinsing and drying;
3) Annealing the cold-rolled steel sheet, and carrying out annealing treatment on the cold-rolled steel sheet by using an annealing furnace, wherein the annealing temperature of the cold-rolled steel sheet in a soaking section of the continuous annealing furnace is 400-750 ℃, and the annealing time is 15-60 s;
4) The method comprises the steps of performing flash rust prevention treatment on a cold-rolled steel plate, adding a flash rust inhibitor into a solution of a last wading procedure before a finished product is prepared, and uniformly coating the flash rust inhibitor on the surface of the cold-rolled steel plate in a dipping or spraying mode, wherein the last wading procedure before the finished product is any one of a cleaning procedure and a leveling procedure;
5) And (3) carrying out purging drying on the cold-rolled steel sheet, and carrying out purging drying on the cold-rolled steel sheet by hot air with the temperature of 80-120 ℃ to remove residual moisture on the surface of the cold-rolled steel sheet, thereby obtaining the finished cold-rolled steel sheet.
6. The method for flash rust prevention treatment of a cold-rolled steel sheet according to claim 5, wherein the cold-rolled steel sheet is a cold-rolled medium-low carbon steel sheet having a thickness of 0.15-0.80 mm.
7. The method for flash rust prevention treatment of a cold-rolled steel sheet according to claim 5, wherein the finished cold-rolled steel sheet is placed in an environment with humidity of 98RH% and temperature of 55 ℃ for 60-70 hours, the cold-rolled steel sheet is rust-free, the film resistance of the cold-rolled steel sheet is 6000-6500 Ω/cm 2, and the contact angle of the water medium of the cold-rolled steel sheet is 43 ° -53 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310233288.6A CN118639235A (en) | 2023-03-13 | 2023-03-13 | Steel plate flash rust prevention agent and steel plate flash rust prevention treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310233288.6A CN118639235A (en) | 2023-03-13 | 2023-03-13 | Steel plate flash rust prevention agent and steel plate flash rust prevention treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118639235A true CN118639235A (en) | 2024-09-13 |
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ID=92660054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310233288.6A Pending CN118639235A (en) | 2023-03-13 | 2023-03-13 | Steel plate flash rust prevention agent and steel plate flash rust prevention treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118639235A (en) |
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2023
- 2023-03-13 CN CN202310233288.6A patent/CN118639235A/en active Pending
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