CN114990560B - High-speed oil removing liquid suitable for strip steel surface and preparation method thereof - Google Patents
High-speed oil removing liquid suitable for strip steel surface and preparation method thereof Download PDFInfo
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- CN114990560B CN114990560B CN202210642218.1A CN202210642218A CN114990560B CN 114990560 B CN114990560 B CN 114990560B CN 202210642218 A CN202210642218 A CN 202210642218A CN 114990560 B CN114990560 B CN 114990560B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 67
- 239000010959 steel Substances 0.000 title claims abstract description 67
- 239000007788 liquid Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 238000005238 degreasing Methods 0.000 claims abstract description 95
- 239000004094 surface-active agent Substances 0.000 claims abstract description 37
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 27
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 11
- 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 claims abstract description 8
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 8
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 8
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 72
- 238000000034 method Methods 0.000 claims description 29
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 26
- 229920000570 polyether Polymers 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 20
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- 229920005682 EO-PO block copolymer Polymers 0.000 claims description 12
- -1 hydroxy ethylidene Chemical group 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 150000002191 fatty alcohols Chemical class 0.000 claims description 8
- 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 claims description 7
- 239000013530 defoamer Substances 0.000 claims description 7
- BWDBEAQIHAEVLV-UHFFFAOYSA-N 6-methylheptan-1-ol Chemical group CC(C)CCCCCO BWDBEAQIHAEVLV-UHFFFAOYSA-N 0.000 claims description 6
- XQRLCLUYWUNEEH-UHFFFAOYSA-L diphosphonate(2-) Chemical compound [O-]P(=O)OP([O-])=O XQRLCLUYWUNEEH-UHFFFAOYSA-L 0.000 claims description 6
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 6
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 2
- 239000001509 sodium citrate Substances 0.000 claims description 2
- 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 claims description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 2
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 2
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 4
- 230000000996 additive effect Effects 0.000 claims 4
- 239000006260 foam Substances 0.000 abstract description 24
- 238000004140 cleaning Methods 0.000 abstract description 10
- 229910017053 inorganic salt Inorganic materials 0.000 abstract description 9
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 46
- 235000019198 oils Nutrition 0.000 description 46
- 230000000052 comparative effect Effects 0.000 description 39
- 230000008569 process Effects 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000004945 emulsification Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000000576 coating method Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000005237 degreasing agent Methods 0.000 description 7
- 239000013527 degreasing agent Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000001804 emulsifying effect Effects 0.000 description 6
- 229920000056 polyoxyethylene ether Polymers 0.000 description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010705 motor oil Substances 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
- 238000007747 plating Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000008233 hard water Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000007761 roller coating Methods 0.000 description 2
- 239000010731 rolling oil Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007127 saponification reaction Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 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 description 1
- LGNQGTFARHLQFB-UHFFFAOYSA-N 1-dodecyl-2-phenoxybenzene Chemical compound CCCCCCCCCCCCC1=CC=CC=C1OC1=CC=CC=C1 LGNQGTFARHLQFB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 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
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- RVGRUAULSDPKGF-UHFFFAOYSA-N Poloxamer Chemical compound C1CO1.CC1CO1 RVGRUAULSDPKGF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- MQKXWEJVDDRQKK-UHFFFAOYSA-N bis(6-methylheptyl) butanedioate Chemical compound CC(C)CCCCCOC(=O)CCC(=O)OCCCCCC(C)C MQKXWEJVDDRQKK-UHFFFAOYSA-N 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000006184 cosolvent Substances 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
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000009736 wetting Methods 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
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention belongs to the technical field of strip steel surface treatment, and particularly relates to a high-speed degreasing fluid suitable for strip steel surfaces and a preparation method thereof. The invention provides high-speed degreasing liquid suitable for the surface of strip steel, which comprises the following components in percentage by weight: 10 to 25 percent of potassium hydroxide, 10 to 25 percent of sodium hydroxide, 2 to 15 percent of surfactant, 2 to 10 percent of sodium gluconate, 1 to 20 percent of compound inorganic salt, 0.01 to 0.2 percent of defoaming agent and the balance of water. The degreasing liquid provided by the invention can meet the cleaning requirements of a steel mill on cold-rolled strip steel at a high speed and short time, the degreasing removal rate of the surface of the strip steel is up to 100% after degreasing and degreasing cleaning of the strip steel are carried out by adopting the degreasing liquid provided by the invention, the degreasing time is only 2-25 s, the cleaning efficiency is high, the defoaming speed is high, the foam residue is low, and meanwhile, the blank of the degreasing liquid used by a domestic high-speed unit is effectively filled.
Description
Technical Field
The invention belongs to the technical field of strip steel surface treatment, and particularly relates to a high-speed degreasing fluid suitable for strip steel surfaces and a preparation method thereof.
Background
Strip steel, also known as steel strip, is a narrow and long steel plate produced by various steel rolling enterprises in order to meet the requirements of various industrial departments for industrially producing various metal or mechanical products. The strip steel is divided into hot rolling and cold rolling according to rolling methods, and is called hot rolled strip steel and cold rolled strip steel respectively.
In the production and processing process of the strip steel, various dirt such as residual rolling oil, engine oil and the like are attached to the surface, and the surface is polluted by powder dust and the like in the transferring and temporary storage processes, so that defects can be generated in the subsequent working procedures. Therefore, the cleaning, degreasing and deoiling of the surface of the strip steel are an important link affecting the quality of products. Practice proves that the selection of a proper oil removal process determines the oil removal performance, and has important influence on the subsequent processes such as electroplating, coating and the like. If a small amount of oil stains are contained on the surface of the metal, the binding force between the substrate and the coating is not strong, foaming and peeling are generated, even the coating cannot be coated, and the like, and the oil stains can influence the structure of the coating, so that gaps are generated between the coatings, the rust resistance of the coating is lower, and meanwhile, the oil stains pollute electrolyte, the oil removing capability is reduced, and the production cost is increased. It can be seen that the degreasing and degreasing agent is used as an undesirable part of metal degreasing and subsequent processes, and determines the degreasing capability of the degreasing liquid and the quality of the plating layer in the electroplating process.
The production and use of the degreasing and deoiling agent mainly take solids as main materials, and the degreasing liquid only can meet the use requirement of a high-speed degreasing unit at present only by imported products, and is mainly monopolized by the products of the high-speed China company in Germany. For example, the highest-speed live tinning unit in the world, which is developed by the Simac company in Germany, has the highest speed per hour of 600m/min and the stable production speed of 500m/min, and is high in speed, the polarity of electrolytic degreasing is changed every 15 minutes, and the tinning solution is strong-acid MSA (metal-ion) plating solution and has no self-degreasing capability, and meanwhile, after the cold-rolled steel strip is cleaned to remove rolling oil, the cold-rolled steel strip is dried, is subjected to electrostatic DOS oil coating, and is transferred into an electrotinning workshop. After the steel coil is uncoiled by a tinning unit, the steel coil is subjected to high-speed degreasing before being plated, which is a degreasing process with the highest cleanliness required by a steel mill, and in a plurality of factories which specially provide continuous coil-to-coil degreasing fluid for strips in the world, only the German Haohao company specially develops C-AK338MG degreasing fluid for the factories and the industries can meet the requirements of the three units. Therefore, development of special oil removal liquid with independent intellectual property rights in China is imperative.
Chinese patent CN 104651865B discloses a low foaming liquid degreasing agent for continuous annealing production line of cold-rolled strip steel, which is prepared from the following raw materials in mass fraction: 10% -35% of sodium hydroxide, 0.1% -0.5% of nonionic surfactant, 1% -5% of phosphate surfactant, 4% -30% of auxiliary agent and water are uniformly mixed to prepare the aqueous emulsion, wherein the auxiliary agent is at least one of hydroxyethylidene diphosphonic acid, sodium gluconate, ethylenediamine tetraacetic acid, acrylate and amide. Although the liquid degreasing agent prepared by the invention can realize low-foam operation without adding an antifoaming agent in the cleaning process, the formula of the liquid degreasing agent adopts a phosphate type anionic surfactant, and once the liquid degreasing agent encounters a cationic surfactant, precipitation occurs to generate pollution, and meanwhile, the degreasing time and the degreasing effect cannot meet higher requirements.
Chinese patent application CN 112126935A discloses a low-temperature adaptive degreasing agent, which comprises the following components in parts by weight: 0.1 to 0.6 part of dodecyl diphenyl ether disulfonate, 0.1 to 0.4 part of diisooctyl succinate sodium sulfonate, 1 to 5 parts of fatty alcohol polyoxyethylene ether, 0.5 to 3 parts of heterogeneous fatty alcohol alkoxylate, 1 to 3 parts of fatty alcohol-alkylene oxide copolymer, 0.5 to 2.5 parts of phenyl polyethylene oxide phosphate, 70 to 80 parts of 30 percent sodium hydroxide aqueous solution, 1 to 6 parts of alkyl substituted dicarboxylic acid salt, 1 to 3 parts of sodium gluconate, 0.5 to 3 parts of defoamer, 0.1 to 1.2 parts of cosolvent and 10 to 15 parts of water. Although the foam can be reduced to a certain extent in the degreasing and deoiling process, the residual foam after the detection after deoiling is still higher, the deoiling time is longer, and the degreasing and deoiling requirements of the strip steel running at high speed cannot be met.
Therefore, the invention aims to provide the metal degreasing liquid special for the surface of the strip steel, the corresponding unit speed can reach 500m/min or less, the degreasing speed and the degreasing effect can be improved to a greater extent under the condition of reducing foam residues in the degreasing process, and the degreasing mode can effectively meet three modes of dipping, cathode electrolysis, anode electrolysis and the like.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a high-speed degreasing fluid suitable for the surface of strip steel and a preparation method thereof. The high-speed degreasing liquid is suitable for the surface of the strip steel, meets the cleaning requirements of a steel mill on cold-rolled strip steel on high speed and short time, has high degreasing removal rate of the surface of the strip steel after degreasing and degreasing cleaning of the strip steel, has high cleaning efficiency of only 2-25 s, has high defoaming speed and low foam residue, and simultaneously effectively fills the blank of the degreasing liquid used by domestic high-speed units.
The technical scheme of the invention is as follows:
the high-speed degreasing liquid suitable for the surface of the strip steel comprises the following components in percentage by weight:
potassium hydroxide, 10 to 25% of the total
Sodium hydroxide is 10 to 25 percent
Surfactant, which is 2 to 15 percent
Sodium gluconate, 2-10% of
The compound inorganic salt is 1 to 20 percent
The antifoaming agent is 0.01 to 0.2 percent
The balance being water.
Preferably, the surfactant is selected from at least two of quaternized polyoxyethylene amine, alkylphenol polyoxyethylene ether, propylene glycol block polyether, isooctyl alcohol polyoxyethylene ether, ethylene oxide-propylene oxide block copolymer, polyether polyol, n-butyl-blocked fatty alcohol ether.
Preferably, the surfactant is composed of three components A, B, C in a weight ratio of 5:5:3, wherein the component A is alkylphenol ethoxylate, the component B is isooctyl alcohol polyoxyethylene ether, and the component C is one of propylene glycol block polyether, ethylene oxide-propylene oxide block copolymer and n-butyl closed fatty alcohol ether.
Preferably, the propylene glycol block polyether has an average molecular weight of 1000 to 2000.
Preferably, the ethylene oxide-propylene oxide block copolymer (EO-PO-EO) has an average molecular weight of 2500.
Preferably, the composite inorganic salt is selected from two or three of potassium pyrophosphate, sodium tripolyphosphate, tetra sodium hydroxy ethylidene diphosphonate, triethanolamine, nitrilotriacetic acid, sodium citrate and sodium dodecyl benzene sulfonate.
Preferably, the composite inorganic salt consists of tetra sodium hydroxy ethylidene diphosphonate and nitrilotriacetic acid according to the weight ratio of 5-15:0.1-3.
Preferably, the composite inorganic salt consists of tetra sodium hydroxy ethylidene diphosphonate and nitrilotriacetic acid according to the weight ratio of 8:1
Preferably, the defoamer is one of propylene glycol block polyether, jiangsu sea-Androme petrochemical GP330 defoamer and Zhongshan Shenwan Xinyu chemical D316 defoamer; the average molecular weight of the propylene glycol block polyether is 2500-8000.
In addition, the invention also provides a preparation method of the high-speed degreasing liquid suitable for the surface of the strip steel, which comprises the following preparation steps:
s1, respectively adding sodium hydroxide and potassium hydroxide into water under the condition of uniform stirring, and stirring for 15min until uniform;
s2, adding a surfactant, and stirring for 20min until the mixture is uniform; then adding sodium gluconate, and stirring for 15min until uniform; adding the composite inorganic salt, and stirring for 15min until uniform;
s3, finally adding an antifoaming agent, stirring for 3 hours until the solution is uniform, and obtaining the product.
Preferably, the stirring speed in the preparation process is 300-400 rpm.
According to the prior art, when the strip steel is subjected to electrolytic degreasing, the electrolytic degreasing is usually required to be performed under the condition of low foam or no foam, because a large amount of foam is generated when the degreasing liquid acts, hydrogen and oxygen generated by electrolysis are accumulated in the foam to easily generate hydrogen explosion, and a large amount of foam overflows to generate certain corrosion to an instrument to increase cleaning difficulty, thereby causing loss to degreasing liquid, increasing production cost, and even if a defoaming agent is added in a formula of the degreasing agent, the defoaming effect is still poor. Therefore, how to reduce the foam generation in the oil removal process and the defoaming time under the conditions of ensuring high oil removal efficiency and short oil removal time is always a technical point which is difficult to overcome in the technical field of strip steel oil removal liquid.
Therefore, the invention effectively improves the oil removal efficiency of oil removal liquid, such as two or more of quaternized polyoxyethylene amine, polyethylene oxide monobutyl ether, alkylphenol polyoxyethylene, propylene glycol block polyether, isooctyl alcohol polyoxyethylene ether, ethylene oxide-propylene oxide block copolymer, polyether polyol and n-butyl closed fatty alcohol ether by generating synergistic effect of the selected surfactants with different components. Further, in the selection and research process of the surfactant, the invention discovers that alkylphenol ethoxylates and isooctyl alcohol ethoxylates are combined for use, and a certain amount of propylene glycol block polyether (the average molecular weight is 1000-2000), ethylene oxide-propylene oxide block copolymer and n-butyl closed fatty alcohol ether are added, so that the surfactant composed of the three components according to a specific proportion can be adsorbed on the surface of the strip steel, reduce the tension of an oil-water interface, increase the contact area, have super-strong emulsification, dispersion and wetting capabilities on pollutants on the surface of the strip steel, generate a synergistic effect between the components, and effectively improve the reactivity between the surfactant and greasy dirt and the deoiling performance of deoiling liquid.
Meanwhile, the oil removal liquid prepared by the surfactant provided by the invention has the advantages of less foam generation amount and short defoaming time in use, and experiments prove that under the condition of adding the same defoaming agent, the foam height and the defoaming time generated by adopting the surfactant selected by the invention can be obviously reduced.
In addition, the sodium hydroxide and the potassium hydroxide added in the invention are taken as strong alkaline substances, and can completely electrolyze after being dissolved in water to generate OH - The method provides strong alkaline conditions, can perform saponification with animal and vegetable oil to generate sodium fatty acid and glycerol with good water solubility, and simultaneously generates sodium/potassium fatty acid with the function of a surfactant, so that the method can perform saponification with mineral oil on the surface of a steel part, thereby improving the removal efficiency of greasy dirt.
The compound inorganic salt added in the invention is used as a builder, and mainly plays roles of softening hard water, buffering pH, resisting redeposition and the like in the oil removal process, and has a synergistic effect with the surfactant added in the invention to further improve the oil removal performance, so that the oil stain can be saponified and decomposed, and the oil stain dispersing, hard water softening and buffering effects are promoted.
Compared with the prior art, the high-speed degreasing fluid suitable for the surface of the strip steel has the following advantages:
(1) The high-speed degreasing fluid suitable for the surface of the strip steel is effectively combined with other auxiliary agents through the surfactants with different component proportions, and has safe components and small corrosiveness to metals; in the degreasing process of the strip steel, most of grease stains on the surface of the strip steel can be rapidly removed, and the degreasing time is only 2s, so that the DOS oil removal rate can reach 100%, the high cleanliness of the 500m/min high-speed moving strip steel and the degreasing requirement of cathode-anode current of 35A/min can be met, and the stability of the coating and the plating layer in the subsequent processing step can be effectively improved.
(2) The high-speed degreasing liquid suitable for the surface of the strip steel is prepared by the invention, through the cooperation of the added defoaming agent and the surfactant, the foam generation in the efficient degreasing and degreasing process is obviously reduced, the possibility of hydrogen explosion caused by aggregation of a large amount of foam in the electrolytic degreasing process is greatly reduced, meanwhile, the corrosiveness of foam overflow to an instrument is also reduced, the strip steel cleaning cost is reduced, the high-speed degreasing liquid has good emulsifying capacity and stability, the production environment of a working site is protected, and the production efficiency of a strip steel production line is ensured.
Detailed Description
The invention is further illustrated by the following description of specific embodiments, which are not intended to be limiting, and various modifications or improvements can be made by those skilled in the art in light of the basic idea of the invention, but are within the scope of the invention as long as they do not depart from the basic idea of the invention.
In the following examples and comparative examples, the reagents not specifically described are conventional reagents, and can be purchased from conventional reagent manufacturing and selling companies.
Example 1A high-speed degreasing fluid suitable for strip steel surface and its preparation method
The high-speed degreasing liquid suitable for the surface of the strip steel consists of the following components in percentage by weight
The surfactant consists of alkylphenol ethoxylates (Dow H66), isooctyl alcohol polyoxyethylene ether and propylene glycol block polyether according to the weight ratio of 5:5:3; the propylene glycol block polyether has an average molecular weight of 1000, cas number: 9003-11-6.
The composite inorganic salt consists of tetra sodium hydroxy ethylidene diphosphonate and nitrilotriacetic acid according to the weight ratio of 8:1.
The defoamer is purchased from Zhongshan Shenwan Xinyu chemical and is model D316.
The preparation method of the high-speed degreasing liquid suitable for the surface of the strip steel comprises the following preparation steps:
s1, respectively adding sodium hydroxide and potassium hydroxide into water under the condition of uniformly stirring at the rotating speed of 350pm, and stirring for 15min to be uniform;
s2, adding a surfactant, and stirring for 20min until the mixture is uniform; then adding sodium gluconate, and stirring for 15min until uniform; adding the composite inorganic salt, and stirring for 15min until uniform;
s3, finally adding an antifoaming agent, stirring for 3 hours until the solution is uniform, and obtaining the product.
Example 2 high-speed degreasing fluid suitable for strip steel surface and preparation method thereof
Example 2 differs from example 1 in that the propylene glycol block polyether (average molecular weight of 1000) in the surfactant was replaced with a propylene glycol block polyether (average molecular weight of 2000), and the other components and preparation steps were the same as in example 1.
Example 3 high speed degreasing fluid suitable for strip steel surface and preparation method thereof
Example 3 differs from example 1 in that the propylene glycol block polyether (average molecular weight of 1000) in the surfactant was replaced with an ethylene oxide-propylene oxide block copolymer (EO-PO-EO) (average molecular weight of 2500), and the other components and preparation steps were the same as in example 1.
Example 4 high speed degreasing fluid suitable for strip steel surface and preparation method thereof
Example 4 differs from example 1 in that the propylene glycol block polyether (average molecular weight 1000) in the surfactant was replaced with n-butyl blocked fatty alcohol ether, and the other components and preparation steps were the same as in example 1.
Comparative example 1 degreasing fluid suitable for strip steel surface and preparation method thereof
Comparative example 1 was different from example 1 in that the propylene glycol block polyether (average molecular weight of 1000) in the surfactant was replaced with the propylene glycol block polyether (average molecular weight of 2300), and the other components and the preparation steps were the same as in example 1.
Comparative example 2 degreasing fluid suitable for strip steel surface and preparation method thereof
Comparative example 2 differs from example 1 in that the propylene glycol block polyether (average molecular weight of 1000) in the surfactant was replaced with a propylene glycol block polyether (average molecular weight of 3000), and the other components and preparation steps were the same as in example 1.
Comparative example 3 degreasing fluid suitable for strip steel surface and preparation method thereof
Comparative example 3 differs from example 1 in that the propylene glycol block polyether (average molecular weight of 1000) in the surfactant was replaced with an ethylene oxide-propylene oxide block copolymer (EO-PO-EO) (average molecular weight of 2000), and the other components and preparation steps were the same as in example 1.
Comparative example 4 degreasing fluid suitable for strip steel surface and preparation method thereof
Comparative example 4 differs from example 1 in that the propylene glycol block polyether (average molecular weight of 1000) in the surfactant was replaced with polyethylene oxide/polypropylene oxide monobutyl ether (Sanyang 50HB, japan), and the other components and preparation steps were the same as in example 3.
Comparative example 5 degreasing fluid suitable for strip steel surface and preparation method thereof
Comparative example 5 differs from example 1 in that the propylene glycol block polyether (average molecular weight 1000) in the surfactant was replaced with the lang Cheng Biaomian active agent Mersolat H95, and the other components and preparation steps were the same as in example 3.
Test example one, defoaming Performance measurement
1. Test object: the degreasing liquid prepared in the embodiments 1 to 4 and the comparative examples 1 to 5 of the present invention; german Hangao C-AK338MG deoiling liquid.
2. The test method comprises the following steps: the German Hangao C-AK338MG degreasing liquid is used as a control group, the degreasing liquid prepared in the embodiments 1-4 and the comparative examples 1-5 is used as the embodiments 1-4, the comparative examples 1-5, the foam performance test is carried out by referring to the mechanical standard JB/T4323.2-2019 water-based metal cleaning agent, and the foam height (cm) and the defoaming time (min) of each group are recorded respectively.
3. The foam heights and defoaming times of the inventive examples, comparative examples and control groups are shown in table 1.
TABLE 1
| Group of | Foam height (cm) | Defoaming time (min) |
| Example 1 group | 0.9 | 10.57 |
| Example 2 group | 1.1 | 11.01 |
| Example 3 group | 0.6 | 0.19 |
| Example 4 group | 0.5 | 9.40 |
| Comparative example 1 group | 5.0 | 61.10 |
| Comparative example 2 group | 4.9 | 54.09 |
| Comparative example 3 group | 5.2 | 25.10 |
| Comparative example 4 group | 5.2 | 25.10 |
| Comparative example 5 group | 3.8 | 22.43 |
| Control group | 0.5 | 7.54 |
As can be seen from the data of the defoaming performance test of the degreasing liquid in Table 1, the foam heights of the degreasing liquids prepared in the examples 1 to 4 are all 1.1cm and below, and the defoaming time is short, wherein the foam height of the example 3 is 0.6cm, the defoaming time is only 0.19min, and the defoaming performance is obviously better than that of the data measured in the control group. As can be seen from the experimental data in the groups of comparative examples 1 to 5, the foam heights of the degreasing liquids prepared in comparative examples 1 to 5 are higher, and the defoaming time is obviously prolonged.
Test example two, determination of emulsifying Property
1. Test object: the degreasing liquid prepared in the embodiments 1 to 4 and the comparative examples 1 to 5 of the present invention; german Hangao C-AK338MG deoiling liquid.
2. The test method comprises the following steps: the German Hangao C-AK338MG degreasing liquid is used as a control group, the degreasing liquid prepared in the embodiments 1-4 and the comparative examples 1-5 is used as the embodiments 1-4, the comparative examples 1-5 are measured by an emulsification method, 20ml of degreasing liquid is respectively taken into a test tube, engine oil is slowly dripped under the condition of ultrasound, and the volume (recorded by the number of drops) of the engine oil consumed when emulsification occurs and oil stains reach saturation is recorded, so that the emulsification performance of the surfactant and the service life of the surfactant are judged.
3. The emulsifying capacity data of the examples of the present invention, the comparative examples and the comparative groups are shown in Table 2.
TABLE 2
| Group of | Number of drops at the beginning of emulsification | Number of drops when oil is full |
| Example 1 group | 3 | 16 |
| Example 2 group | 3 | 20 |
| Example 3 group | 1 | 12 |
| Example 4 group | 1 | 13 |
| Comparative example 1 group | 2 | 10 |
| Comparative example 2 group | 2 | 14 |
| Comparative example 3 group | 1 | 10 |
| Comparative example 4 group | 3 | 11 |
| Comparative example 5 group | 4 | 15 |
| Control group | 3 | 14 |
Emulsification is the process of dispersing one liquid into a second, immiscible liquid. The longer the saturated cyclic alkyl and paraffinic hydrocarbon groups contained in the surfactant, the better the emulsification with the oil film, the easier the emulsion is formed, and the better the emulsifying capacity of the surfactant is. When the emulsification between the surfactant and the oil stain is saturated, the emulsion is completely layered, so that when the same amount of the surfactant and the oil stain are emulsified, the longer the service life of the surfactant is, the shorter the time required for the emulsification between the degreasing liquid prepared by the surfactant and the oil film is, the better the response capability is, the less the time required in the degreasing process is, the production efficiency can be improved, and the production cost is reduced.
Therefore, the oil-removing liquids of the present invention of the groups 1 to 4, the comparative examples 1 to 5 and the degree control group were measured for emulsifying ability and response ability, and it is apparent from the measurement results of table 2 that the oil-removing liquids of the groups 3 and 4 were emulsified quickly and with relatively high emulsifying ability and allowed to act on greasy dirt in a short period of time, as compared with the comparative examples. The degreasing liquid prepared in the example 2 is saturated, and the required oil stain amount is obviously increased compared with that of the comparative example, so that the degreasing liquid has longer service life.
Test example III, determination of oil removal Property
1. Test object: the degreasing liquid prepared in the embodiments 1 to 4 and the comparative examples 1 to 5 of the present invention; german Hangao C-AK338MG deoiling liquid.
2. The test method comprises the following steps: the configuration method and the experimental result evaluation method of the artificial oil stain in the cleaning capability experiment (quality method) are referred to the mechanical standard JB/T4323.2-2019 water-based metal cleaning agent, 5.4. The de-oiling liquid obtained in the embodiments 1 to 4 and the comparative examples 1 to 5 of the present invention are the embodiments 1 to 4 and the comparative examples 1 to 5 by using the de-oiling liquid of the German Hangao C-AK338MG as the control group. When in use, each group of degreasing fluid is diluted to 5% by water, a primary cold-rolled low-carbon steel plate with the thickness of 100mm 70mm 0.2mm is adopted, the brand of the steel plate is T4-CA, and the electrolytic degreasing performance test is carried out;
(1) Carrying out DOS oil roller coating with the area of 70mm and the thickness of 10 mu m on the steel plate, and then carrying out electrolytic degreasing test, wherein the degreasing time is 2s;
(2) Preparing artificial oil stain, adding DOS oil at the same time, preparing mixed oil stain, carrying out DOS oil roller coating with the area of 70mm and 70mm on a steel plate, and then carrying out electrolytic degreasing test with the thickness of 10 mu m, wherein the degreasing time is 25s;
the operation conditions in the electrolytic degreasing process are as follows: degreasing temperature: 60-80 ℃; positive electrode material: a stainless steel plate; current density: 3A/m 2 。
3. The oil removal performance test data of the inventive examples, comparative examples and control groups are shown in table 3.
TABLE 3 Table 3
As can be seen from Table 3, the degreasing rate of DOS oil reaches 100% under the condition that the degreasing time of the degreasing liquid prepared in the embodiments 1 to 4 is only 2s; when the oil removal time is 25s, the oil removal rate of the mixed oil stain is above 53%, wherein the oil removal rate of the embodiment 4 on the mixed oil stain is up to 84.10%, the oil removal effect of the oil removal liquid is obviously better than that of the German Hangao C-AK338MG, and the oil removal method is completely applicable to the technological requirement of high-speed oil removal on the surface of strip steel.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (5)
1. The high-speed oil removal liquid suitable for the surface of the strip steel is characterized by comprising the following components in percentage by weight: 10 to 25 percent of potassium hydroxide, 10 to 25 percent of sodium hydroxide, 2 to 15 percent of surfactant, 2 to 10 percent of sodium gluconate, 1 to 20 percent of composite additive, 0.01 to 0.2 percent of defoamer and the balance of water; the surfactant consists of A, B, C components; the component A is alkylphenol ethoxylates, the component B is isooctyl alcohol ethoxylates, and the component C is one of propylene glycol block polyether, ethylene oxide-propylene oxide block copolymer and n-butyl closed fatty alcohol ether; the average molecular weight of the propylene glycol block polyether is 1000-2000; the average molecular weight of the ethylene oxide-propylene oxide block copolymer is 2500; the composite additive is selected from two or three of potassium pyrophosphate, sodium tripolyphosphate, tetra sodium hydroxy ethylidene diphosphonate, triethanolamine, nitrilotriacetic acid, sodium citrate and sodium dodecyl benzene sulfonate.
2. The high-speed degreasing liquid suitable for the surface of strip steel as claimed in claim 1, wherein the composite additive consists of tetra sodium hydroxy ethylidene diphosphonate and nitrilotriacetic acid according to the weight ratio of 5-15:0.1-3.
3. The high-speed degreasing fluid suitable for the surface of strip steel according to claim 1, wherein the defoaming agent is one of propylene glycol block polyether and Jiangsu sea An petrochemical GP330 defoaming agent; the average molecular weight of the propylene glycol block polyether in the defoamer is 2500-8000.
4. A method for preparing a high-speed degreasing liquid suitable for a strip steel surface according to any one of claims 1 to 3, comprising the following preparation steps:
s1, respectively adding sodium hydroxide and potassium hydroxide into water under the condition of uniform stirring, and stirring for 15min until uniform;
s2, adding a surfactant, and stirring for 20min until the mixture is uniform; then adding sodium gluconate, and stirring for 15min until uniform; adding the composite additive, and stirring for 15min until the mixture is uniform;
s3, finally adding an antifoaming agent, stirring for 3 hours until the solution is uniform, and obtaining the product.
5. The method for preparing high-speed oil removal liquid suitable for strip steel surface as claimed in claim 4, wherein the stirring speed in the preparation process is 300-400 rpm.
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| SU1127918A1 (en) * | 1983-06-20 | 1984-12-07 | Предприятие П/Я А-1785 | Solution for degreasing metal surface |
| CN102127798A (en) * | 2011-01-14 | 2011-07-20 | 燕山大学 | Low temperature electrolytic cleaning agent particularly suitable for secondary cold-rolled steel strip |
| CN109136940A (en) * | 2018-09-07 | 2019-01-04 | 苏州安美润滑科技有限公司 | Low bubble cleaning agent of a kind of environment-friendly type high performance ferrous metal antirust and preparation method thereof |
| CN110452762A (en) * | 2019-07-31 | 2019-11-15 | 南宁珀源能源材料有限公司 | Polytenization sheet silicon wafer cutting fluid and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1127918A1 (en) * | 1983-06-20 | 1984-12-07 | Предприятие П/Я А-1785 | Solution for degreasing metal surface |
| CN102127798A (en) * | 2011-01-14 | 2011-07-20 | 燕山大学 | Low temperature electrolytic cleaning agent particularly suitable for secondary cold-rolled steel strip |
| CN109136940A (en) * | 2018-09-07 | 2019-01-04 | 苏州安美润滑科技有限公司 | Low bubble cleaning agent of a kind of environment-friendly type high performance ferrous metal antirust and preparation method thereof |
| CN110452762A (en) * | 2019-07-31 | 2019-11-15 | 南宁珀源能源材料有限公司 | Polytenization sheet silicon wafer cutting fluid and preparation method thereof |
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