CN112962103A - Acidic normal-temperature degreasing agent and preparation method thereof - Google Patents
Acidic normal-temperature degreasing agent and preparation method thereof Download PDFInfo
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- CN112962103A CN112962103A CN202110125919.3A CN202110125919A CN112962103A CN 112962103 A CN112962103 A CN 112962103A CN 202110125919 A CN202110125919 A CN 202110125919A CN 112962103 A CN112962103 A CN 112962103A
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- degreasing agent
- temperature
- steel plate
- cleaning
- cold
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- 238000005237 degreasing agent Methods 0.000 title claims abstract description 71
- 239000013527 degreasing agent Substances 0.000 title claims abstract description 69
- 230000002378 acidificating effect Effects 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 20
- 238000003756 stirring Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 38
- 229910000831 Steel Inorganic materials 0.000 abstract description 34
- 239000010959 steel Substances 0.000 abstract description 34
- 239000010960 cold rolled steel Substances 0.000 abstract description 23
- 239000011248 coating agent Substances 0.000 abstract description 10
- 238000000576 coating method Methods 0.000 abstract description 10
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 238000007127 saponification reaction Methods 0.000 abstract description 7
- 230000003749 cleanliness Effects 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 239000000243 solution Substances 0.000 description 18
- 238000000137 annealing Methods 0.000 description 13
- 239000004094 surface-active agent Substances 0.000 description 11
- 238000005238 degreasing Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 239000006260 foam Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 229920000056 polyoxyethylene ether Polymers 0.000 description 7
- 229940051841 polyoxyethylene ether Drugs 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 150000002191 fatty alcohols Chemical class 0.000 description 4
- 239000002736 nonionic surfactant Substances 0.000 description 4
- -1 polyoxyethylene Polymers 0.000 description 4
- 239000010731 rolling oil Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 239000000176 sodium gluconate Substances 0.000 description 3
- 235000012207 sodium gluconate Nutrition 0.000 description 3
- 229940005574 sodium gluconate Drugs 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 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 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- FFDGPVCHZBVARC-UHFFFAOYSA-N N,N-dimethylglycine Chemical compound CN(C)CC(O)=O FFDGPVCHZBVARC-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 2
- 239000004299 sodium benzoate Substances 0.000 description 2
- 235000010234 sodium benzoate Nutrition 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000001488 sodium phosphate Substances 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 2
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 2
- 235000019801 trisodium phosphate Nutrition 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 description 1
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- MRUAUOIMASANKQ-UHFFFAOYSA-O carboxymethyl-[3-(dodecanoylamino)propyl]-dimethylazanium Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC(O)=O MRUAUOIMASANKQ-UHFFFAOYSA-O 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- DTPCFIHYWYONMD-UHFFFAOYSA-N decaethylene glycol Polymers OCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO DTPCFIHYWYONMD-UHFFFAOYSA-N 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 229940075468 lauramidopropyl betaine Drugs 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- DZCAZXAJPZCSCU-UHFFFAOYSA-K sodium nitrilotriacetate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DZCAZXAJPZCSCU-UHFFFAOYSA-K 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XFLNVMPCPRLYBE-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate;tetrahydrate Chemical compound O.O.O.O.[Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O XFLNVMPCPRLYBE-UHFFFAOYSA-J 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000002888 zwitterionic surfactant Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/088—Iron or steel solutions containing organic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses an acidic normal-temperature degreasing agent and a preparation method thereof, the acidic normal-temperature degreasing agent can rapidly strip and emulsify dirt such as oil stain, iron powder and the like from the surface of a cold-rolled steel plate at the temperature of 10-40 ℃, simultaneously remove an oxide film and a rust on the surface of the steel plate, realize the settlement and separation of the dirt in a degreasing agent circulating tank, prevent the cleaned dirt from flowing and adhering to the surface of the steel plate along with the circulation of a cleaning solution, greatly shorten the cleaning period, obtain a cold-rolled steel plate with high surface cleanliness, and ensure that a later coating has excellent adhesive force on the surface of the cold-rolled steel plate; compared with the conventional alkaline degreasing agent, the high-temperature degreasing agent avoids heat energy sources such as steam consumed by high-temperature saponification, and the application temperature is 10-40 ℃, so that the cleaning energy consumption is greatly reduced, and the cleaning cost is saved; the preparation method of the acidic normal-temperature degreasing agent has the advantages of simple operation steps, high feasibility of preparation and implementation and strong practicability.
Description
Technical Field
The invention relates to the technical field of metal degreasing agents, in particular to an acidic normal-temperature degreasing agent and a preparation method thereof.
Background
In the process of pickling and cold rolling of cold rolled steel sheets (coils) such as cold rolled silicon steel sheets and automobile sheets, rolling oil (emulsion) composed of various greases (such as natural greases, synthetic greases, and the like), rust inhibitors, extreme pressure agents, and the like is generally used for lubricating, cooling, and temporarily preventing rust of the rolled steel sheets, so that the rolling oil (mainly grease) remains on the surfaces of the rolled steel sheets after the rolling of the steel sheets is completed, and before the rolled steel sheets (coils) are continuously annealed, the residual oil stains and iron powder remaining on the steel sheets in the rolling process are removed by methods such as chemical degreasing, electrolytic degreasing, and the like, so as to prevent the residual oil stains and the iron powder from carbonizing the surfaces of the steel sheets to form carbonaceous stains during annealing, thereby avoiding the influence on the performance and quality of the steel sheets during coating or other surface processing processes in the subsequent processes. Therefore, it is necessary to remove grease, stain, iron powder, and the like on the surface of the cold-rolled steel sheet (coil) cleanly using a degreasing agent. The degreasing process of the cold-rolled steel coil continuous annealing production line is generally provided with a spraying section and a brushing section (the brush roller rotates reversely), and some high-speed (the strip steel speed is more than 600m/min) annealing lines are additionally provided with an electrolytic degreasing section for further improving the surface quality. The main process parameters of the degreasing section of these continuous annealing lines are generally: the spraying pressure of the degreasing agent is 0.2-0.4 MPa, and the cleaning temperature is 60-85 ℃.
In the existing patent literature, more special degreasing agents for producing a continuous annealing line have been disclosed: patent number ZL93109825.4 discloses a cleaning agent for cleaning cold-rolled silicon steel plates, which comprises 20-30% of sodium hydroxide, 50-60% of sodium silicate, 10-15% of sodium tripolyphosphate, 1-6% of alkylphenol polyoxyethylene ether and 1-6% of fatty alcohol polyoxyethylene ether, but contains phosphate, and a surfactant also contains an environmentally-friendly alkylphenol polyoxyethylene ether compound (APEO), and the degreasing agent has more foams and limited cleaning effect; patent No. ZL200510022869.7 discloses an alkaline detergent composition for electrolytic cleaning of cold rolled steel sheet, typically containing 33-42% sodium hydroxide, 0.5-20% alkyl polyoxyethylene ether surfactant, 1-8% water-soluble macromolecular carboxylic acid and 0.5-15% aldonic acid, and the balance being pure water, the alkaline detergent composition has high alkali concentration and good fluidity, and still has good cleaning effect at low temperature (not higher than 50 ℃), in addition, the patent document also carries out comparative cleaning effect tests on various polyoxyethylene alkyl ether surfactants; patent No. ZL200810123991.7 discloses an anti-emulsification water-based metal cleaner, characterized in that the oil stain will not be dispersed stably in the cleaner to form emulsion, but rather, the oil stain will form larger oil particles and float on the surface of the cleaner for separation, the formulation comprises 3-7% of nonionic surfactant selected from fatty amine polyoxypropylene ether or alkylphenol polyether, 3-7% of zwitterionic surfactant selected from alkyl dimethylamino acetic acid betaine and lauramidopropyl betaine, 1-5% of chelating agent selected from sodium citrate, ethylene diamine tetraacetic acid tetrasodium, sodium nitrilotriacetate, 1-5% of rust inhibitor selected from sodium tetraborate, sodium nitrite, sodium benzoate and long carbon chain carboxylic acid amine, 5-10% of inorganic builder selected from trisodium phosphate, sodium metasilicate, sodium carbonate, sodium bicarbonate and sodium hydroxide, and the balance being pure water; patent number ZL201010201620.3 discloses a degreasing agent for producing a coated steel plate and a preparation method thereof, wherein the degreasing agent comprises 5-10% of polyethylene glycol as an additive, 10-15% of a nonionic surfactant as a surfactant, 3-6% of one or more of molybdate, silicate and sodium benzoate as a corrosion inhibitor, and the balance of inorganic alkaline aqueous solution, and is characterized by having sufficient degreasing effect and being not easy to corrode a zinc coating; the patent No. ZL201210150010.4 discloses a special surfactant composition for spraying low-foam cleaning and a preparation method thereof, the special surfactant composition has the advantages of low foam, good cleaning power, difficult precipitation in alkaline solution, easy rinsing, environmental protection and the like, and comprises, by weight, 30-70 parts of fatty alcohol polyoxyethylene polyoxypropylene ether, 1-30 parts of tea saponin, 0.1-20 parts of fatty alcohol polyoxyethylene ether, S-801-20 parts of span, 0.01-1 part of cellulose and a pH value adjusting solution for adjusting the pH value to 6-8, wherein the pH value adjusting solution is 30-50% of potassium hydroxide solution; patent number ZL201110336935.3 discloses degreasing liquid before hot galvanizing of a cold-rolled sheet, which comprises 0.5-2.0% of octyl phenol polyoxyethylene (10) ether, 0.3-1.2% of sodium dodecyl benzene sulfonate, 3-5% of sodium carbonate, 1-2% of monoethanolamine, 2-4% of sodium gluconate, 22-30% of sodium hydroxide and the balance of water, and the degreasing liquid is phosphorus-free and environment-friendly, has good long-term storage stability, is free of crystallization and liquid stratification and is convenient and simple to use; the degreasing efficiency is high, the zinc plating adhesion is uniform, and the adhesion of a zinc layer is strong; the patent No. ZL201510091971.6 discloses a low-foam liquid degreasing agent for a cold-rolled strip steel continuous annealing production line, a novel low-foam surfactant which is obtained by epoxy modification of fatty alcohol and a phosphate surfactant are compounded and dissolved in a high-concentration sodium hydroxide solution, and meanwhile, sodium gluconate, EDTA, HEDP, acrylate, polyacrylamide and other chemicals are used as auxiliary agents to replace polyoxyethylene ether surfactant in the original degreasing agent, so that the consumption of the degreasing agent generated by foam in strip steel cleaning is solved, the foam generated by the active agent brought in the previous process is inhibited, the low-foam liquid degreasing agent is high in cleaning efficiency and low in consumption, a defoaming agent is not needed, and the cleaning cost of the strip steel is reduced; the invention patent application 201510107576.2 discloses a degreasing agent for a cold rolling continuous annealing unit, which comprises 12-36% of sodium hydroxide, 0-6% of potassium hydroxide, 1-5% of sodium carbonate, 1-5% of trisodium phosphate, 1-6% of sodium gluconate, 0.5-2% of ethylene diamine tetraacetic acid, 0.5-2% of sodium polyacrylate, 0.5-2% of nonylphenol polyoxyethylene ether, 0.5-2% of an anionic phosphate surfactant and the balance of desalted water.
In the patent documents disclosed above, the degreasing agent mainly depends on wetting and emulsifying action of the surfactant and saponification action of the inorganic base to achieve the effect of removing the greasy dirt on the surface of the strip steel; the working temperature of the degreasing agent solution is heated to 60-85 ℃, so that the saponification speed can be increased, and the oil stain removal is accelerated.
The key points of the development trend of the degreasing agent are as follows: on the premise of ensuring the cleaning effect, the use cost of a user (a steel mill) is reduced, the environment friendliness of raw materials is realized, and the requirement of simple post-treatment of cleaning wastewater is met. Among the key points, the degreasing and cleaning temperature is reduced, so that the consumption of steam (or electricity consumption and natural gas consumption) for heating in a steel mill is reduced, and the core requirement for reducing the cost of the steel mill is met; the degreasing agent for the currently disclosed continuous annealing line cleaning unit and the technical scheme thereof mostly adopt a full nonionic surfactant or a complex system of an anionic surfactant and a nonionic surfactant, the cleaning temperature mainly adopts high temperature (60-85 ℃), and saponification reaction is used as a main oil removal measure.
In actual production, surface oxidation caused by poor rolling of the surface of a steel plate often occurs on the site of a steel mill, or surface rusting of the surface of the steel plate is caused by uneven dispersion of rolling oil (or emulsion) in the rolling process, too long standing time of a cold-rolled steel plate and the like; for the cold-rolled steel sheets with oxidized surfaces and rusty surfaces, after being cleaned by the alkaline degreasing agent, the cold-rolled steel sheets cannot remove slight oxidation films and rusty surfaces, so that the surface quality and the brightness of the steel sheets are influenced, the coating adhesion force after annealing and coating is also deteriorated, and the coating adhesion force on the surfaces of the steel sheets is reduced.
In order to reduce the cleaning temperature of a continuous annealing line and remove residual rolling oil, iron powder, an oxide film and rust on the surface of a cold-rolled steel sheet, the patent provides an acidic normal-temperature degreasing agent and a preparation method thereof.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an acidic normal-temperature degreasing agent and a preparation method thereof, the acidic normal-temperature degreasing agent can rapidly strip and emulsify dirt such as oil dirt, iron powder and the like from the surface of a cold-rolled steel plate at the temperature of 10-40 ℃, simultaneously remove an oxide film and a floating rust on the surface of the steel plate, realize the settlement separation of the dirt in a degreasing agent circulating tank, prevent the cleaned dirt from flowing and adhering to the surface of the steel plate along with the circulation of a cleaning solution, greatly shorten the cleaning period, obtain the cold-rolled steel plate with high surface cleanliness, and ensure that a later-period coating has excellent adhesive force on the surface of the cold-rolled steel plate; compared with the conventional alkaline degreasing agent, the high-temperature degreasing agent avoids heat energy sources such as steam consumed by high-temperature saponification, and the application temperature is 10-40 ℃, so that the cleaning energy consumption is greatly reduced, and the cleaning cost is saved; the preparation method of the acidic normal-temperature degreasing agent has the advantages of simple operation steps, high feasibility of preparation and implementation and strong practicability.
In order to achieve the purpose, the technical scheme of the invention is to design an acidic normal-temperature degreasing agent, which comprises the following components in percentage by mass: 20 to 35 percent of hydroxyethylidene diphosphonic acid, 1 to 3 percent of triethanolamine, 310.2 to 0.4 percent of Armohib CI-310, 10 to 15 percent of Genapol EP2584, 251 to 5 percent of Ethoquad C, 770.2 to 0.5 percent of Buckman Busan and the balance of pure water.
In order to ensure the smooth preparation and application implementation of the acidic normal-temperature degreasing agent, a preparation method of the acidic normal-temperature degreasing agent is provided, and comprises the following steps:
s1: according to the mass percentage, under the stirring state, sequentially adding hydroxyethylidene diphosphonic acid and triethanolamine into pure water, and uniformly stirring to obtain a primary premixed solution;
s2: when the primary premixed solution is cooled to 10-35 ℃, sequentially adding Armohib CI-31, Ethoquad C/25 and Buckman Busan 77 into the primary premixed solution prepared in the step S1 according to the mass percentage, and uniformly stirring to obtain a secondary premixed solution;
s3: and (3) adding Genapol EP2584 into the secondary premixed solution prepared in the step S2 in a stirring state according to the mass percentage, and uniformly stirring to obtain the acidic normal-temperature degreasing agent.
The preferable technical scheme is that in the step S2 and the step S3, the stirring time after the materials are added is 10-30 min.
The invention has the advantages and beneficial effects that:
1. the acidic normal-temperature degreasing agent disclosed by the invention does not depend on saponification for decontamination, avoids steam and other heat energy sources consumed by high-temperature saponification compared with the conventional alkaline degreasing agent, and has the application temperature of 10-40 ℃, so that the cleaning energy consumption is greatly reduced, and the cleaning cost is saved.
2. The acidic normal-temperature degreasing agent is used for cleaning cold-rolled steel plates and other products on a coil steel continuous annealing production line, is not required to be mixed with other components, is not required to be added with a defoaming agent, and is simple in cleaning operation steps.
3. The acidic normal-temperature degreasing agent can rapidly peel and emulsify dirt such as oil dirt, iron powder and the like from the surface of a cold-rolled steel plate at the temperature of 10-40 ℃, simultaneously remove an oxide film and a rust on the surface of the steel plate, realize the settlement separation of dirt in a degreasing agent circulating tank, avoid the cleaned dirt from flowing and adhering to the surface of the steel plate along with a cleaning liquid in a circulating manner, greatly shorten the cleaning period, obtain the cold-rolled steel plate with high surface cleanliness, and ensure that a later-period coating has excellent adhesive force on the surface of the cold-rolled steel plate.
4. The preparation method of the acidic normal-temperature degreasing agent has the advantages of simple operation steps, high feasibility of preparation and implementation and strong practicability.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
An acidic normal-temperature degreasing agent comprises the following components in percentage by mass:
the preparation method of the acidic normal-temperature degreasing agent in the embodiment 1 comprises the following steps:
s1: according to the mass percentage, adding pure water into a stirring kettle provided with a thermometer, a stirrer and a dropping device, introducing cooling circulating water into a jacket of the stirring kettle, sequentially adding hydroxyethylidene diphosphonic acid and triethanolamine into the pure water under the stirring state, and uniformly stirring to obtain a primary premixed solution;
s2: when the primary premixed solution is cooled to 10-35 ℃, sequentially adding Armohib CI-31, Ethoquad C/25 and Buckman Busan 77 into the primary premixed solution prepared in the step S1 according to the mass percentage, and stirring for 10-30 min to make the solution uniform, so as to obtain a secondary premixed solution;
s3: and (3) adding Genapol EP2584 into the secondary premixed solution prepared in the step S2 under the stirring state according to the mass percentage, and stirring for 10-30 min to ensure that the solution is uniform, thereby obtaining the acidic normal-temperature degreasing agent.
Example 2
An acidic normal-temperature degreasing agent comprises the following components in percentage by mass:
the preparation method of the acidic normal-temperature degreasing agent in the embodiment 2 is the same as that of the acidic normal-temperature degreasing agent in the embodiment 1.
Example 3
An acidic normal-temperature degreasing agent comprises the following components in percentage by mass:
the preparation method of the acidic normal-temperature degreasing agent in example 3 is the same as that of the acidic normal-temperature degreasing agent in example 1.
Example 4
An acidic normal-temperature degreasing agent comprises the following components in percentage by mass:
the preparation method of the acidic normal-temperature degreasing agent in example 4 is the same as that of the acidic normal-temperature degreasing agent in example 1.
The acid normal-temperature degreasing agent prepared in the embodiments 1 to 4 of the present invention and a commercially available degreasing agent (liquid high-alkalinity degreasing agent, model: HH TZY-030, hong quill industrials ltd., Maanshan, cleaning at 60 to 85 ℃) are used in a normal-temperature degreasing agent cleaning section of a continuous annealing line of a cold-rolled steel sheet (having slight rust, an oxide film, etc. on the surface) respectively, and the surface cleaning index of the cleaned cold-rolled steel sheet is shown in table 1.
TABLE 1 cleanliness indices of cold rolled steel sheets in comparative examples and examples 1-4
The experimental data shown in table 1 indicate that: compared with the cleaning effect of the commercial degreasing agent on the cold-rolled coil steel plate in the comparative example, the cold-rolled coil steel plate cleaned by the acidic normal-temperature degreasing agent prepared in the examples 1-4 has excellent surface quality, the surface reflectivity is not less than 96%, no rust and oxide film are formed on the surface of the cold-rolled coil steel plate, and the adhesion force of the subsequent coating can reach level 1, which shows that the cold-rolled coil steel plate has high surface cleanliness after being cleaned by the acidic normal-temperature degreasing agent disclosed by the invention, so that the adhesion force of the coating in the subsequent process is improved; in the use process of the degreasing agent, the acidic normal-temperature degreasing agent prepared in the embodiments 1 to 4 can rapidly strip and emulsify dirt such as oil dirt, iron powder and the like from the surface of a cold-rolled steel plate at the temperature of 10 ℃ to 40 ℃, simultaneously remove an oxidation film and a rust on the surface of the steel plate, realize the settlement separation of the dirt in a degreasing agent circulating tank, prevent the cleaned dirt from flowing along with a cleaning liquid and attaching to the surface of the steel plate again, shorten the cleaning period, and remarkably reduce the working energy consumption of a continuous annealing production line of a cold-rolled steel plate; when the acidic normal-temperature degreasing agent prepared in the embodiments 1 to 4 is used, the acidic normal-temperature degreasing agent does not need to be mixed with other components, a defoaming agent does not need to be added, and the cleaning operation step is simple.
Wherein hydroxyethylidene diphosphonic acid, triethanolamine, Armohib CI-31, Genapol EP2584, Ethoquad C/25 and Buckman Busan 77 are all commercially available products.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The acidic normal-temperature degreasing agent is characterized by comprising the following components in percentage by mass: 20 to 35 percent of hydroxyethylidene diphosphonic acid, 1 to 3 percent of triethanolamine, 310.2 to 0.4 percent of Armohib CI-310, 10 to 15 percent of Genapol EP2584, 251 to 5 percent of Ethoquad C, 770.2 to 0.5 percent of Buckman Busan and the balance of pure water.
2. A method for preparing the acidic room-temperature degreasing agent according to claim 1, comprising the steps of:
s1: according to the mass percentage of claim 1, under the stirring state, sequentially adding hydroxyethylidene diphosphonic acid and triethanolamine into pure water, and uniformly stirring to obtain a primary premixed solution;
s2: when the primary premixed solution is cooled to 10-35 ℃, sequentially adding Armohib CI-31, Ethoquad C/25 and Buckman Busan 77 into the primary premixed solution prepared in the step S1 according to the mass percentage of the claim 1, and uniformly stirring to obtain a secondary premixed solution;
s3: according to the mass percentage of claim 1, adding Genapol EP2584 into the secondary premixed solution prepared in the step S2 under the stirring state, and uniformly stirring to obtain the acidic normal-temperature degreasing agent.
3. The method for preparing the acidic normal-temperature degreasing agent as claimed in claim 2, wherein in the step S2 and the step S3, the stirring time after the materials are added is 10-30 min.
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