CN117127187A - Rust removal and prevention agent for steel parts and preparation method thereof - Google Patents
Rust removal and prevention agent for steel parts and preparation method thereof Download PDFInfo
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- CN117127187A CN117127187A CN202311123622.9A CN202311123622A CN117127187A CN 117127187 A CN117127187 A CN 117127187A CN 202311123622 A CN202311123622 A CN 202311123622A CN 117127187 A CN117127187 A CN 117127187A
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- Prior art keywords
- steel parts
- rust removing
- preventing agent
- phosphate
- steel
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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 81
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 230000002265 prevention Effects 0.000 title abstract description 8
- -1 modified imidazoline quaternary ammonium salt Chemical class 0.000 claims abstract description 60
- 238000005260 corrosion Methods 0.000 claims abstract description 44
- 230000007797 corrosion Effects 0.000 claims abstract description 44
- 230000003405 preventing effect Effects 0.000 claims abstract description 43
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- 239000003112 inhibitor Substances 0.000 claims abstract description 25
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims abstract description 16
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000467 phytic acid Substances 0.000 claims abstract description 15
- 235000002949 phytic acid Nutrition 0.000 claims abstract description 15
- 229940068041 phytic acid Drugs 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 31
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 20
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims description 20
- 150000002191 fatty alcohols Chemical class 0.000 claims description 20
- 229920001451 polypropylene glycol Polymers 0.000 claims description 20
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 20
- 229910019142 PO4 Inorganic materials 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 18
- 239000010452 phosphate Substances 0.000 claims description 18
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 15
- 239000008139 complexing agent Substances 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 15
- 229910021641 deionized water Inorganic materials 0.000 claims description 15
- 239000007800 oxidant agent Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 10
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 claims description 10
- 229940073608 benzyl chloride Drugs 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 10
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 239000008117 stearic acid Substances 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 7
- 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 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- MFXMOUUKFMDYLM-UHFFFAOYSA-L zinc;dihydrogen phosphate Chemical compound [Zn+2].OP(O)([O-])=O.OP(O)([O-])=O MFXMOUUKFMDYLM-UHFFFAOYSA-L 0.000 claims description 5
- XXQBEVHPUKOQEO-UHFFFAOYSA-N potassium superoxide Chemical compound [K+].[K+].[O-][O-] XXQBEVHPUKOQEO-UHFFFAOYSA-N 0.000 claims description 4
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims 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 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- NAAXGLXYRDSIRS-UHFFFAOYSA-L dihydrogen phosphate;manganese(2+) Chemical compound [Mn+2].OP(O)([O-])=O.OP(O)([O-])=O NAAXGLXYRDSIRS-UHFFFAOYSA-L 0.000 claims description 2
- 229910000160 potassium phosphate Inorganic materials 0.000 claims description 2
- 235000011009 potassium phosphates Nutrition 0.000 claims description 2
- 239000000176 sodium gluconate Substances 0.000 claims description 2
- 229940005574 sodium gluconate Drugs 0.000 claims description 2
- 235000012207 sodium gluconate Nutrition 0.000 claims description 2
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 claims description 2
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 239000010410 layer Substances 0.000 abstract description 7
- 230000001681 protective effect Effects 0.000 abstract description 7
- 125000000524 functional group Chemical group 0.000 abstract description 6
- 230000005764 inhibitory process Effects 0.000 abstract description 6
- 238000005202 decontamination Methods 0.000 abstract description 4
- 230000003588 decontaminative effect Effects 0.000 abstract description 4
- 238000002161 passivation Methods 0.000 abstract description 4
- 239000011241 protective layer Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 238000007792 addition Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000012267 brine Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying 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
- C23G1/02—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
-
- 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
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
- C23G1/066—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors phosphorus-containing compounds
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)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a rust removing and preventing agent for steel parts and a preparation method thereof, belonging to the technical field of steel surface treatment. The rust removing and preventing agent for steel parts integrates various performances such as decontamination, rust removal, rust prevention, phosphating, passivation and the like, can convert loose rust into stable polymer net-shaped substances, is firmly adhered to the surface of steel, forms a protective sealing layer and enhances the corrosion resistance of the steel; the corrosion inhibitor contains O, S and N polar functional groups and a nonpolar functional group taking C as a central atom, so that the corrosion of steel can be slowed down; the modified imidazoline quaternary ammonium salt and the monoalkyl polyoxypropylene phosphate are used together to achieve a synergistic effect, so that the strength of the protective film is obviously enhanced; in the invention, the phytic acid molecules form a protective layer which is attached to the surface of steel, so as to achieve the effects of protection and corrosion inhibition.
Description
Technical Field
The invention belongs to the technical field of steel surface treatment, and particularly relates to a rust removing and preventing agent for steel parts and a preparation method thereof.
Background
In the production and life, the steel products are widely applied to various industries, but the steel products have poor corrosion resistance and are easy to rust in the atmosphere, and the weight of metal materials and equipment scrapped due to corrosion each year worldwide is about 20% or more of the annual yield of the metal. In order to slow down the corrosion of steel products and prolong the service life of the steel products, the surfaces of the steel products must be subjected to rust and corrosion prevention treatment.
At present, various rust removing and preventing agents have been developed at home and abroad, and can be directly coated on the surface of metal, so that rust can be quickly and effectively decomposed and converted into a layer of metal protective film with corrosion preventing performance, thereby achieving excellent rust removing and preventing effects and realizing the unification of rust removing and preventing. However, such products still suffer from the following disadvantages: (1) the practical application conditions such as thickness, uniformity and the like of the rust layer have great influence on the performance of the rust layer; (2) the existence of the resin film forming material and the organic solvent in the coating can whiten and pulverize the surface of the coated object, and the phenomenon of incomplete conversion of firm rust exists, so that the expected effect is difficult to achieve.
Therefore, aiming at the problems of rust removal and rust prevention at present, the development of a rust removal and rust prevention liquid which has simple production process and low investment cost and can integrate multiple performances of oil removal, decontamination, rust removal, phosphating, passivation and rust prevention is needed.
Disclosure of Invention
The invention relates to a rust removing and preventing agent for steel parts and a preparation method thereof, belonging to the technical field of steel surface treatment. The rust removing and preventing agent for steel parts integrates various performances such as decontamination, rust removal, rust prevention, phosphating, passivation and the like, can convert loose rust into stable polymer net-shaped substances, is firmly adhered to the surface of steel, forms a protective sealing layer and enhances the corrosion resistance of the steel; the corrosion inhibitor contains O, S and N functional groups with polarity and nonpolar functional groups taking C as a central atom, so that the corrosion of steel can be slowed down; the modified imidazoline quaternary ammonium salt and the monoalkyl polyoxypropylene phosphate are used together to achieve a synergistic effect, so that the strength of the protective film is obviously enhanced; in the invention, the phytic acid molecules form a protective layer which is attached to the surface of steel, so as to achieve the effects of protection and corrosion inhibition.
The aim of the invention can be achieved by the following technical scheme:
a rust removing and preventing agent for steel parts is prepared from the following raw materials in percentage by mass: 25-35% of phosphoric acid, 0.5-0.8% of phytic acid, 1-3% of phosphate, 3-8% of oxidant, 1-3% of complexing agent, 0.01-2% of corrosion inhibitor and the balance of water.
As a preferable embodiment of the present invention, the phosphate is at least one of sodium phosphate, potassium phosphate, manganese dihydrogen phosphate, and zinc dihydrogen phosphate.
In a preferred embodiment of the present invention, the oxidizing agent is at least one of sodium peroxide, potassium peroxide, and hydrogen peroxide.
As a preferable scheme of the invention, the complexing agent is at least one of hydroxyethylidene diphosphonic acid, ethylenediamine tetraacetic acid, tartaric acid and sodium gluconate.
As a preferable scheme of the invention, the corrosion inhibitor comprises the following components in percentage by mass: 0.8-1.2 of monoalkylpolyoxypropylene phosphate and modified imidazoline quaternary ammonium salt.
As a preferred embodiment of the present invention, the monoalkyl polyoxypropylene phosphate is prepared by:
adding fatty alcohol polyoxypropylene ether into a reactor, and adding P while stirring 2 O 5 Reacting at 75-85 ℃ for 8-10h, adding deionized water, and reacting at 90-95 ℃ for 10-12h;
the fatty alcohol polyoxypropylene ether and P 2 O 5 The molar ratio of (2) to (2) 2.2:1; the addition amount of the deionized water is 4-4.2wt% of the total system after the deionized water is added.
As a preferred embodiment of the present invention, the fatty alcohol polyoxypropylene ether is prepared by the following operations: adding potassium hydroxide and dodecanol into a reactor, heating to 75-85 ℃, removing water, discharging air by using nitrogen after 50-60min, heating to 120-130 ℃, adding propylene oxide, controlling the molar ratio of the propylene oxide to the dodecanol to be 3.5-4, controlling the pressure to be 0.2-0.4MPa, and reacting for 50-60min to obtain the fatty alcohol polyoxypropylene ether.
As a preferable scheme of the invention, the modified imidazoline quaternary ammonium salt is prepared by the following operations: adding stearic acid and diethylenetriamine into a reactor, heating to 155-165 ℃, controlling the pressure in the reactor to be 8.1-8.2kPa for 2.5-3 hours, heating to 190-200 ℃, controlling the pressure in the reactor to be 5-5.1kPa, reacting in inert gas for 2.5-3 hours, and cooling to room temperature; adding benzyl chloride dropwise, heating to 100-110 ℃ for reaction for 2-2.5h, cooling to room temperature, adding thiourea, heating to 100-110 ℃ for reaction for 1.5-2h, and obtaining the modified imidazoline quaternary ammonium salt.
As a preferable scheme of the invention, the molar ratio of the stearic acid to the diethylenetriamine to the benzyl chloride to the thiourea is 1:1-1.2:1-1.2:1-1.2.
The preparation method of the rust removing and preventing agent for the steel parts comprises the following operation steps:
(1) Weighing various raw materials according to a proportion;
(2) Adding phosphoric acid into water accounting for 1/3 of the total weight, and uniformly stirring;
(3) Adding phosphate into the solution prepared in the step (2) and stirring uniformly;
(4) Adding a complexing agent into the solution prepared in the step (3) and uniformly stirring;
(5) Adding phytic acid into the solution prepared in the step (4) and uniformly stirring;
(6) Adding a corrosion inhibitor into the solution prepared in the step (5) and uniformly stirring;
(7) Adding an oxidant into the solution prepared in the step (6) and uniformly stirring;
(8) Adding the rest water and stirring uniformly to obtain the rust removing and preventing agent for the steel parts.
The invention has the beneficial effects that:
1. the rust removing and preventing agent for iron and steel parts is one product with several functions including decontamination, rust removing, rust preventing, phosphating, passivation, etc. and may be used in converting loose iron rust into stable polymer net material to adhere firmly to the surface of iron and steel to form protecting sealing layer for reinforcing the corrosion resistance of iron and steel. The product can complete rust removal and rust prevention at one time, and the formed metal salt protective film has strong adhesive force, is well combined with various coatings, and meets various requirements of coating standards. The use condition is simple, the method is suitable for a room-temperature spraying or dipping treatment process, heating equipment is not needed, and the purposes of saving energy and being easy to produce are achieved.
2. The corrosion inhibitor contains O, S and N functional groups with polarity and nonpolar functional groups taking C as central atoms, when the corrosion inhibitor is in contact with steel, the polar groups and the surface charges of the steel are subjected to adsorption reaction, the nonpolar groups are closely arranged on the surface of the metal and extend outwards to form a hydrophobic protective layer, and the hydrophobic layer can effectively prevent corrosive substances in solution from contacting with the steel, so that the steel corrosion is slowed down.
3. The corrosion inhibition effect of the modified imidazoline quaternary ammonium salt in the invention uses the adsorption film as the adsorption filmMainly, the adsorption of the corrosion inhibitor on the metal surface is a dynamic process, and the adsorption strength is relatively weak; the corrosion inhibition of the monoalkyl polyoxypropylene phosphate is mainly carried out by a precipitation film, and the monoalkyl polyoxypropylene phosphate and Ca 2+ 、Fe 2+ 、Mg 2+ The plasma is subjected to chelation to form a complex precipitate film on the metal surface, the strength of the film is high, but the film is difficult to completely cover the whole metal surface, and the film and the metal surface are used together to achieve synergistic effect, so that the strength of the protective film is obviously enhanced; the modified imidazoline quaternary ammonium salt mainly inhibits corrosion caused by cathode reaction, while the monoalkyl polyoxypropylene phosphate mainly inhibits corrosion caused by anode reaction, and the modified imidazoline quaternary ammonium salt and the monoalkyl polyoxypropylene phosphate can simultaneously and effectively inhibit corrosion caused by cathode and anode reactions when being used in a combined mode, so that the corrosion inhibition effect is better.
4. In the invention, in an acidic environment, the phytic acid molecules are adsorbed on the surface of iron through the adsorption effect of the Langmuir, and the phytic acid forms a protective layer to be attached on the surface of steel, so that the protection and corrosion inhibition effects are achieved.
5. The monoalkyl polyoxypropylene phosphate and the modified imidazoline quaternary ammonium salt serve as corrosion inhibitors, have good protection effect, and also serve as surface active agents, so that the corrosion inhibitors have good surface activity, and no surface active agents are required to be added.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A rust removing and preventing agent for steel parts is prepared from the following raw materials in percentage by mass: 25% of phosphoric acid, 0.5% of phytic acid, 1% of phosphate, 3% of oxidant, 1% of complexing agent, 0.01% of corrosion inhibitor and the balance of water.
The phosphate is zinc dihydrogen phosphate.
The oxidizing agent is hydrogen peroxide.
The complexing agent is hydroxyethylidene diphosphonic acid.
The corrosion inhibitor comprises the following components in percentage by mass: 0.8 of monoalkylpolyoxypropylene phosphate and modified imidazoline quaternary ammonium salt.
The monoalkyl polyoxypropylene phosphate is prepared by the following operation:
adding fatty alcohol polyoxypropylene ether into a reactor, and adding P while stirring 2 O 5 Reacting at 75 ℃ for 8 hours, adding deionized water, and reacting at 90 ℃ for 10 hours;
the fatty alcohol polyoxypropylene ether and P 2 O 5 The molar ratio of (2) to (1); the addition amount of the deionized water is 4wt% of the total system after the deionized water is added;
the fatty alcohol polyoxypropylene ether is prepared by the following operation: adding potassium hydroxide and dodecanol into a reactor, heating to 75 ℃, removing moisture, discharging air by using nitrogen after 50min, heating to 120 ℃, adding propylene oxide, controlling the molar ratio of the propylene oxide to the dodecanol to be 3.5, controlling the pressure to be 0.2MPa, and reacting for 50min to obtain the fatty alcohol polyoxypropylene ether.
The modified imidazoline quaternary ammonium salt is prepared by the following operation: adding stearic acid and diethylenetriamine into a reactor, heating to 155 ℃, controlling the pressure in the reactor to be 8.1kPa for reaction for 2.5 hours, then heating to 190 ℃, controlling the pressure in the reactor to be 5kPa, reacting in inert gas for 2.5 hours, and cooling to room temperature; adding benzyl chloride dropwise, heating to 100 ℃ for reaction for 2 hours, cooling to room temperature, adding thiourea, heating to 100 ℃ for reaction for 1.5 hours, and obtaining the modified imidazoline quaternary ammonium salt.
The molar ratio of the stearic acid to the diethylenetriamine to the benzyl chloride to the thiourea is 1:1:1:1.
The preparation method of the rust removing and preventing agent for the steel parts comprises the following operation steps:
(1) Weighing various raw materials according to a proportion;
(2) Adding phosphoric acid into water accounting for 1/3 of the total weight, and uniformly stirring;
(3) Adding phosphate into the solution prepared in the step (2) and stirring uniformly;
(4) Adding a complexing agent into the solution prepared in the step (3) and uniformly stirring;
(5) Adding phytic acid into the solution prepared in the step (4) and uniformly stirring;
(6) Adding a corrosion inhibitor into the solution prepared in the step (5) and uniformly stirring;
(7) Adding an oxidant into the solution prepared in the step (6) and uniformly stirring;
(8) Adding the rest water and stirring uniformly to obtain the rust removing and preventing agent for the steel parts.
Example 2
A rust removing and preventing agent for steel parts is prepared from the following raw materials in percentage by mass: 30% of phosphoric acid, 0.65% of phytic acid, 2% of phosphate, 5% of oxidant, 2% of complexing agent, 1% of corrosion inhibitor and the balance of water.
The phosphate is zinc dihydrogen phosphate.
The oxidizing agent is hydrogen peroxide.
The complexing agent is hydroxyethylidene diphosphonic acid.
The corrosion inhibitor comprises the following components in percentage by mass: 1 and modified imidazoline quaternary ammonium salt.
The monoalkyl polyoxypropylene phosphate is prepared by the following operation:
adding fatty alcohol polyoxypropylene ether into a reactor, and adding P while stirring 2 O 5 Reacting at 80 ℃ for 9 hours, adding deionized water, and reacting at 92 ℃ for 11 hours;
the fatty alcohol polyoxypropylene ether and P 2 O 5 The molar ratio of (2) to (1) is 2.1:1; the addition amount of the deionized water is 4.1 weight percent of the total system after the deionized water is added;
the fatty alcohol polyoxypropylene ether is prepared by the following operation: adding potassium hydroxide and dodecanol into a reactor, heating to 80 ℃, removing moisture, discharging air by using nitrogen after 55min, heating to 125 ℃, adding propylene oxide, controlling the molar ratio of the propylene oxide to the dodecanol to be 3.8, controlling the pressure to be 0.3MPa, and reacting for 55min to obtain the fatty alcohol polyoxypropylene ether.
The modified imidazoline quaternary ammonium salt is prepared by the following operation: adding stearic acid and diethylenetriamine into a reactor, heating to 160 ℃, controlling the pressure in the reactor to be 8.15kPa for reaction for 2.8 hours, then heating to 195 ℃, controlling the pressure in the reactor to be 5.05kPa, reacting in inert gas for 2.8 hours, and cooling to room temperature; adding benzyl chloride dropwise, heating to 105 ℃ for reaction for 2.2h, cooling to room temperature, adding thiourea, heating to 105 ℃ for reaction for 1.8h, and obtaining the modified imidazoline quaternary ammonium salt.
The molar ratio of the stearic acid to the diethylenetriamine to the benzyl chloride to the thiourea is 1:1.1:1.1:1.1.
The preparation method of the rust removing and preventing agent for the steel parts comprises the following operation steps:
(1) Weighing various raw materials according to a proportion;
(2) Adding phosphoric acid into water accounting for 1/3 of the total weight, and uniformly stirring;
(3) Adding phosphate into the solution prepared in the step (2) and stirring uniformly;
(4) Adding a complexing agent into the solution prepared in the step (3) and uniformly stirring;
(5) Adding phytic acid into the solution prepared in the step (4) and uniformly stirring;
(6) Adding a corrosion inhibitor into the solution prepared in the step (5) and uniformly stirring;
(7) Adding an oxidant into the solution prepared in the step (6) and uniformly stirring;
(8) Adding the rest water and stirring uniformly to obtain the rust removing and preventing agent for the steel parts.
Example 3
A rust removing and preventing agent for steel parts is prepared from the following raw materials in percentage by mass: 35% of phosphoric acid, 0.8% of phytic acid, 3% of phosphate, 8% of oxidant, 3% of complexing agent, 2% of corrosion inhibitor and the balance of water.
The phosphate is zinc dihydrogen phosphate.
The oxidizing agent is hydrogen peroxide.
The complexing agent is hydroxyethylidene diphosphonic acid.
The corrosion inhibitor comprises the following components in percentage by mass: 1.2 of monoalkyl polyoxypropylene phosphate and modified imidazoline quaternary ammonium salt.
The monoalkyl polyoxypropylene phosphate is prepared by the following operation:
adding fatty alcohol polyoxypropylene ether into a reactor, and adding P while stirring 2 O 5 Reacting at 85 ℃ for 10 hours, adding deionized water, and reacting at 95 ℃ for 12 hours;
the fatty alcohol polyoxypropylene ether and P 2 O 5 The molar ratio of (2) to (1) is 2.2:1; the addition amount of the deionized water is 4.2wt% of the total system after the deionized water is added;
the fatty alcohol polyoxypropylene ether is prepared by the following operation: adding potassium hydroxide and dodecanol into a reactor, heating to 85 ℃, removing water, discharging air by using nitrogen after 60min, heating to 130 ℃, adding propylene oxide, controlling the molar ratio of the propylene oxide to the dodecanol to be 4, controlling the pressure to be 0.4MPa, and reacting for 60min to obtain the fatty alcohol polyoxypropylene ether.
The modified imidazoline quaternary ammonium salt is prepared by the following operation: adding stearic acid and diethylenetriamine into a reactor, heating to 165 ℃, controlling the pressure in the reactor to be 8.2kPa for reaction for 3 hours, then heating to 200 ℃, controlling the pressure in the reactor to be 5.1kPa, reacting in inert gas for 3 hours, and cooling to room temperature; adding benzyl chloride dropwise, heating to 110 ℃ for reaction for 2.5h, cooling to room temperature, adding thiourea, heating to 110 ℃ for reaction for 2h, and obtaining the modified imidazoline quaternary ammonium salt.
The molar ratio of the stearic acid to the diethylenetriamine to the benzyl chloride to the thiourea is 1:1.2:1.2:1.2.
The preparation method of the rust removing and preventing agent for the steel parts comprises the following operation steps:
(1) Weighing various raw materials according to a proportion;
(2) Adding phosphoric acid into water accounting for 1/3 of the total weight, and uniformly stirring;
(3) Adding phosphate into the solution prepared in the step (2) and stirring uniformly;
(4) Adding a complexing agent into the solution prepared in the step (3) and uniformly stirring;
(5) Adding phytic acid into the solution prepared in the step (4) and uniformly stirring;
(6) Adding a corrosion inhibitor into the solution prepared in the step (5) and uniformly stirring;
(7) Adding an oxidant into the solution prepared in the step (6) and uniformly stirring;
(8) Adding the rest water and stirring uniformly to obtain the rust removing and preventing agent for the steel parts.
Comparative example 1
Compared with the rust removing and preventing agent for steel parts, the rust removing and preventing agent for steel parts is not added with a corrosion inhibitor, and the equal mass of benzotriazole is used for replacing the corrosion inhibitor, and the rest is the same as the example 1.
Comparative example 2
Compared with example 1, the rust removing and preventing agent for steel parts does not contain monoalkyl polyoxypropylene phosphate, and the monoalkyl polyoxypropylene phosphate is replaced by modified imidazoline quaternary ammonium salt with the same mass, and the rest is the same as example 1.
Comparative example 3
A rust removing and preventing agent for steel parts is prepared by replacing modified imidazoline quaternary ammonium salt with monoalkyl polyoxypropylene phosphate of equal mass, and the rest is the same as in example 1, without adding modified imidazoline quaternary ammonium salt.
Comparative example 4
Compared with the example 1, the rust removing and preventing agent for the steel parts is free of phytic acid, the phytic acid is replaced by the corrosion inhibitor with the same mass, and the rest is the same as the example 1.
The rust removing and preventing agents for steel parts prepared in examples 1 to 3 and comparative examples 1 to 4 were tested as follows:
test example 1
Weighing the dried rust sample with the mass of m 0 . Soaking the sample in a rust remover, taking out after 5 minutes, drying, and recording and weighing the mass m at the moment 1 . When rust is not observed on the surface of the sample, the sample is taken out of the rust remover. The sample was wiped with absorbent cotton dipped with absolute ethanol, then dried, and the mass m was measured 2 . S is the rust removal area of 1250mm 2 . The short-time rust removal rate eta is used for representing the quality of the rust removal effect in a short time (5 minutes). The rust removing time t is the time required for rust to be completely removed. The calculation formulas of the rust removal rate eta and the rust removal rate upsilon are shown as follows, and the obtained results are shown in table 1:
test example 2 salt water immersion test
The steel plates immersed in the rust removing and preventing agents for steel parts prepared in examples 1 to 3 and comparative examples 1 to 4 for 1 hour were washed and dried, then immersed in NaC l solution with mass fraction of 3.5%, and the change conditions of the system were observed at 0.5h,3h,6h,12h and 24h, respectively, and the experimental results were recorded, and the brine resistance was observed, and the obtained results are shown in Table 1.
TABLE 1
As can be seen from table 1, the rust removing and preventing agent for iron and steel parts prepared by the present invention has good rust removing rate, rust removing rate and brine resistance in examples 1 to 3; and the rust removing rate, the rust removing rate and the salt water resistance of the rust removing and preventing agent for steel parts prepared in comparative examples 1 to 4 are reduced to different degrees.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (10)
1. The rust removing and preventing agent for the steel parts is characterized by being prepared from the following raw materials in percentage by mass: 25-35% of phosphoric acid, 0.5-0.8% of phytic acid, 1-3% of phosphate, 3-8% of oxidant, 1-3% of complexing agent, 0.01-2% of corrosion inhibitor and the balance of water.
2. The rust removing and preventing agent for steel parts according to claim 1, wherein the phosphate is at least one of sodium phosphate, potassium phosphate, manganese dihydrogen phosphate and zinc dihydrogen phosphate.
3. The rust removing and preventing agent for steel parts according to claim 1, wherein the oxidizing agent is at least one of sodium peroxide, potassium peroxide and hydrogen peroxide.
4. The rust removing and preventing agent for steel parts according to claim 1, wherein the complexing agent is at least one of hydroxyethylidene diphosphonic acid, ethylenediamine tetraacetic acid, tartaric acid and sodium gluconate.
5. The rust removing and preventing agent for steel parts according to claim 1, wherein the corrosion inhibitor comprises the following components in percentage by mass: 0.8-1.2 of monoalkylpolyoxypropylene phosphate and modified imidazoline quaternary ammonium salt.
6. The rust removing and preventing agent for steel parts according to claim 5, wherein the monoalkyl polyoxypropylene phosphate is prepared by the following operations:
adding fatty alcohol polyoxypropylene ether into a reactor, and adding P while stirring 2 O 5 Reacting at 75-85 ℃ for 8-10h, adding deionized water, and reacting at 90-95 ℃ for 10-12h;
the fatty alcohol polyoxypropylene ether and P 2 O 5 The molar ratio of (2) to (2) 2.2:1; the addition amount of the deionized water is 4-4.2wt% of the total system after the deionized water is added.
7. The rust removing and preventing agent for steel parts according to claim 6, wherein the fatty alcohol polyoxypropylene ether is prepared by the following operations: adding potassium hydroxide and dodecanol into a reactor, heating to 75-85 ℃, removing water, discharging air by using nitrogen after 50-60min, heating to 120-130 ℃, adding propylene oxide, controlling the molar ratio of the propylene oxide to the dodecanol to be 3.5-4, controlling the pressure to be 0.2-0.4MPa, and reacting for 50-60min to obtain the fatty alcohol polyoxypropylene ether.
8. The rust removing and preventing agent for steel parts according to claim 5, wherein the modified imidazoline quaternary ammonium salt is prepared by the following operations: adding stearic acid and diethylenetriamine into a reactor, heating to 155-165 ℃, controlling the pressure in the reactor to be 8.1-8.2kPa for 2.5-3 hours, heating to 190-200 ℃, controlling the pressure in the reactor to be 5-5.1kPa, reacting in inert gas for 2.5-3 hours, and cooling to room temperature; adding benzyl chloride dropwise, heating to 100-110 ℃ for reaction for 2-2.5h, cooling to room temperature, adding thiourea, heating to 100-110 ℃ for reaction for 1.5-2h, and obtaining the modified imidazoline quaternary ammonium salt.
9. The rust removing and preventing agent for steel parts according to claim 8, wherein the molar ratio of the stearic acid to the diethylenetriamine to the benzyl chloride to the thiourea is 1:1-1.2:1-1.2:1-1.2.
10. A method for preparing the rust removing and preventing agent for steel parts according to any one of claims 1 to 9, characterized in that the method comprises the following operation steps:
(1) Weighing various raw materials according to a proportion;
(2) Adding phosphoric acid into water accounting for 1/3 of the total weight, and uniformly stirring;
(3) Adding phosphate into the solution prepared in the step (2) and stirring uniformly;
(4) Adding a complexing agent into the solution prepared in the step (3) and uniformly stirring;
(5) Adding phytic acid into the solution prepared in the step (4) and uniformly stirring;
(6) Adding a corrosion inhibitor into the solution prepared in the step (5) and uniformly stirring;
(7) Adding an oxidant into the solution prepared in the step (6) and uniformly stirring;
(8) Adding the rest water and stirring uniformly to obtain the rust removing and preventing agent for the steel parts.
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