CN113637974A - Rust removing and preventing liquid for steel workpiece before coating and preparation method thereof - Google Patents
Rust removing and preventing liquid for steel workpiece before coating and preparation method thereof Download PDFInfo
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- CN113637974A CN113637974A CN202110945353.9A CN202110945353A CN113637974A CN 113637974 A CN113637974 A CN 113637974A CN 202110945353 A CN202110945353 A CN 202110945353A CN 113637974 A CN113637974 A CN 113637974A
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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 52
- 230000003405 preventing effect Effects 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000011248 coating agent Substances 0.000 title claims abstract description 9
- 238000000576 coating method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910001868 water Inorganic materials 0.000 claims abstract description 44
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 34
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003822 epoxy resin Substances 0.000 claims abstract description 22
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000011787 zinc oxide Substances 0.000 claims abstract description 17
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims abstract description 17
- 229910000165 zinc phosphate Inorganic materials 0.000 claims abstract description 17
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229960004889 salicylic acid Drugs 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 12
- 230000000996 additive effect Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 28
- 238000000498 ball milling Methods 0.000 claims description 19
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 15
- 239000006185 dispersion Substances 0.000 claims description 10
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 10
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims description 10
- 235000010234 sodium benzoate Nutrition 0.000 claims description 10
- 239000004299 sodium benzoate Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 9
- 239000011241 protective layer Substances 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 abstract description 3
- 238000002161 passivation Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005303 weighing Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000001680 brushing effect Effects 0.000 description 4
- 238000009775 high-speed stirring Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- -1 PO4 3- Chemical class 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/12—Orthophosphates containing zinc cations
- C23C22/17—Orthophosphates containing zinc cations containing also 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
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (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 discloses a rust removing and preventing liquid for a steel workpiece before coating and a preparation method thereof, wherein the rust removing and preventing liquid is prepared from the following raw materials in parts by weight: 16-19 parts of water-based epoxy resin, 22.4-26.6 parts of additive I, 6-7 parts of salicylic acid, 1-2 parts of zinc phosphate, 1-2 parts of zinc oxide, 5-6 parts of additive II and 200 parts of water. The rust removing and preventing liquid can directly convert a rust layer on the surface of a steel workpiece to form a complex with a protection effect, and finally forms a protective layer on the surface of the steel workpiece under the action of the water-based epoxy resin. The protective layer has strong adhesive force with the steel base material and excellent antirust performance. The rust removing and preventing liquid can be directly coated on the surface of a steel workpiece, so that rust removing and preventing are finished at one time, and complicated multiple procedures of rust removing, phosphorization, passivation and the like are omitted. The construction process is simple to operate, has quick effect on rust and has excellent environmental protection performance. The rust removing and preventing liquid can be directly coated without cleaning.
Description
Technical Field
The invention relates to the technical field of metal surface rust prevention, in particular to a rust removing and preventing liquid for a steel workpiece before coating and a preparation method thereof.
Background
The steel workpiece needs to be pretreated before coating, and the surface of the steel workpiece is generally provided with a loose, moist and rusty iron layer with a certain thickness. The traditional treatment method comprises the working procedures of oil removal, rust removal, water washing, phosphorization, passivation and the like. The treatment method has the defects that the process is complex and tedious, and carcinogens such as nitrite and the like can be introduced in the phosphating process, so that the environment is polluted and the human health is harmed. Aiming at the problems, the research on the rust removing and preventing products which are simple in process, excellent in comprehensive performance and more environment-friendly is a new development direction and trend.
Patent 201310626820.7 discloses a rust removing and preventing solution containing alkyd resin, but the main purpose is rust prevention, and it is not clear whether the solution needs to be cleaned before coating after use, and the used raw materials are too many.
Disclosure of Invention
In order to overcome the defects of the traditional treatment method, the invention aims to provide the rust removing and preventing liquid for the steel workpiece before coating and the preparation method thereof. The rust removing and preventing liquid can be directly coated without cleaning.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a rust removing and preventing liquid for a steel workpiece before coating, which is prepared from the following raw materials in parts by weight: 16-19 parts of water-based epoxy resin, 22.4-26.6 parts of additive I, 6-7 parts of salicylic acid, 1-2 parts of zinc phosphate, 1-2 parts of zinc oxide, 5-6 parts of additive II and 200 parts of water.
Preferably, the aqueous epoxy resin is CYDW-100 aqueous epoxy resin.
Preferably, the first auxiliary agent is a waterborne epoxy curing agent CYDHD-220.
Preferably, the auxiliary agent II is prepared from the following raw materials in parts by weight: 3-5 parts of sodium benzoate, 2-3 parts of urotropine, 1-2 parts of EDTA disodium salt and 54-60 parts of water; the preparation method comprises the steps of adding EDTA disodium salt into water, heating to 50 ℃, stirring for 16-20 minutes, adding sodium benzoate, urotropine and water, and continuing stirring for 5-10 minutes to obtain the auxiliary agent II.
Salicylic acid as rust converting agent can react with rust on steel surface to convert the rust into complex with certain protection effect to remove rust.
The waterborne epoxy resin has extremely high adhesive force to steel base materials, and has excellent corrosion resistance and chemical resistance; the paint does not contain organic solvent, does not cause air pollution and has excellent environmental protection performance; the water is used as a dispersion medium, has no odor and high safety, and can be used at room temperature and in a humid environment.
Zinc phosphate and zinc oxide can be hydrolyzed to form various ions, such as PO4 3-、HPO3 3-、Zn2+Fe equivalent to the surface of steel2+、Fe3 +And the complex is formed through chemical reaction, so that the corrosion of steel is inhibited, and the antirust effect is achieved.
And the sodium benzoate and the urotropine in the auxiliary agent II form a composite corrosion inhibitor, so that the corrosion on the surface of the steel can be effectively inhibited, and the antirust effect is achieved.
EDTA disodium salt in the second auxiliary agent can be mixed with Fe on the surface of steel2+、Fe3+Form stable complex, and has good synergistic effect when used together with zinc phosphate and zinc oxide, thereby inhibiting steel corrosion and achieving better antirust effect.
The preparation method of the rust removing and preventing liquid is characterized by comprising the following steps of: and (2) uniformly mixing and stirring the water-based epoxy resin and the first auxiliary agent, then transferring the mixture into a ball mill, adding water, zinc phosphate and zinc oxide, carrying out ball milling for 1-2 hours until the fineness reaches 30 mu m, transferring the substances in the ball mill tank into a high-speed dispersion machine, adding salicylic acid and the second auxiliary agent, and uniformly stirring and dispersing at a high speed to obtain the rust removing and preventing liquid.
The invention has the beneficial effects that:
the rust removing and preventing liquid can directly convert a rust layer on the surface of a steel workpiece to form a complex with a protection effect, and finally forms a protective layer on the surface of the steel workpiece under the action of the water-based epoxy resin. The protective layer has strong adhesive force with the steel base material and excellent antirust performance. The rust removing and preventing liquid can be directly coated on the surface of a steel workpiece, so that rust removing and preventing are finished at one time, and complicated multiple procedures of rust removing, phosphorization, passivation and the like are omitted. The construction process is simple to operate, has quick effect on rust and has excellent environmental protection performance. The rust removing and preventing liquid can be directly coated without cleaning.
Drawings
FIG. 1 shows the surface appearance of a rusted test piece of three different materials and a stainless steel test piece before brushing.
FIG. 2 shows the surface appearance of a rusted test piece of three different materials and a stainless steel test piece after brushing.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the drawings and examples, but those skilled in the art will understand that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples were carried out under the conventional conditions, unless otherwise specified. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
Weighing the raw materials by using balance, wherein the specific mass of each raw material is as follows: 16g of CYDW-100 waterborne epoxy resin, 22.4g of additive I, 6g of salicylic acid, 1g of zinc phosphate, 1g of zinc oxide, 5g of additive II and 200g of water.
The first auxiliary agent is a waterborne epoxy curing agent CYDHD-220.
The auxiliary agent II is prepared from the following raw materials in parts by weight: 3g of sodium benzoate, 2g of urotropine, 1g of EDTA disodium salt and 54g of water; the preparation method comprises the steps of adding EDTA disodium salt into water, heating to 50 ℃, stirring for 16 minutes, adding other residual materials, and continuously stirring for 10 minutes to obtain the auxiliary agent II.
After weighing is finished, mixing and stirring the CYDW-100 aqueous epoxy resin and the first auxiliary agent uniformly, then transferring the mixture into a ball milling tank, adding water, zinc phosphate and zinc oxide, carrying out ball milling for 1-2 hours until the fineness reaches 30 mu m, transferring the substances in the ball milling tank into a high-speed dispersion machine, adding salicylic acid, the second auxiliary agent and water, and carrying out high-speed stirring and uniform dispersion to obtain the rust removing and preventing liquid. The stirring speed was 100 r/min.
Example 2
Weighing the raw materials by using balance, wherein the specific mass of each raw material is as follows: 17g of CYDW-100 waterborne epoxy resin, 23.8g of additive I, 6.2g of salicylic acid, 1.2g of zinc phosphate, 1.2g of zinc oxide, 6g of additive II and 200g of water.
The first auxiliary agent is a waterborne epoxy curing agent CYDHD-220.
The auxiliary agent II is prepared from the following raw materials in parts by weight: 3.5g of sodium benzoate, 2.2g of urotropine, 1.2g of EDTA disodium salt and 55g of water; the preparation method comprises the steps of adding EDTA disodium salt into water, heating to 50 ℃, stirring for 17 minutes, adding other residual materials, and continuously stirring for 10 minutes to obtain the auxiliary agent II.
After weighing is finished, mixing and stirring the CYDW-100 waterborne epoxy resin and the auxiliary agent I uniformly, then transferring the mixture into a ball milling tank, and adding water, zinc phosphate and zinc oxide. Ball milling is carried out for 1-2 hours, when the fineness reaches 30 mu m, the materials in the ball milling tank are transferred into a high-speed dispersion machine, salicylic acid, the second auxiliary agent and water are added, and the materials are stirred at high speed and dispersed uniformly, so that the rust removing and preventing liquid is obtained. The stirring speed was 100 r/min.
Example 3
Weighing the raw materials by using balance, wherein the specific mass of each raw material is as follows: 17.5g of CYDW-100 waterborne epoxy resin, 24.5g of auxiliary agent I, 6.4g of salicylic acid, 1.4g of zinc phosphate, 1.4g of zinc oxide, 6g of auxiliary agent II and 200g of water.
The first auxiliary agent is a waterborne epoxy curing agent CYDHD-220.
The auxiliary agent II is prepared from the following raw materials in parts by weight: 4g of sodium benzoate, 2.4g of urotropine, 1.4g of EDTA disodium salt and 56g of water; the preparation method comprises the steps of adding EDTA disodium salt into water, heating to 50 ℃, stirring for 18 minutes, adding other residual materials, and continuously stirring for 10 minutes to obtain the auxiliary agent II.
After weighing is finished, mixing and stirring the CYDW-100 aqueous epoxy resin and the first auxiliary agent uniformly, then transferring the mixture into a ball milling tank, adding water, zinc phosphate and zinc oxide, carrying out ball milling for 1-2 hours until the fineness reaches 30 mu m, transferring the substances in the ball milling tank into a high-speed dispersion machine, adding salicylic acid, the second auxiliary agent and water, and carrying out high-speed stirring and uniform dispersion to obtain the rust removing and preventing liquid. The stirring speed was 100 r/min.
Example 4
Weighing the raw materials by using balance, wherein the specific mass of each raw material is as follows: 18g of CYDW-100 waterborne epoxy resin, 25.2g of additive I, 6.6g of salicylic acid, 1.6g of zinc phosphate, 1.6g of zinc oxide, 6g of additive II and 200g of water.
The first auxiliary agent is a waterborne epoxy curing agent CYDHD-220.
The auxiliary agent II is prepared from the following raw materials in parts by weight: 4g of sodium benzoate, 2.6g of urotropine, 1.6g of EDTA disodium salt and 57g of water; the preparation method comprises the steps of adding EDTA disodium salt into water, heating to 50 ℃, stirring for 19 minutes, adding other residual materials, and continuing stirring for 10 minutes to obtain the auxiliary agent II.
After weighing is finished, mixing and stirring the CYDW-100 waterborne epoxy resin and the auxiliary agent I uniformly, then transferring the mixture into a ball milling tank, and adding water, zinc phosphate and zinc oxide. Ball milling is carried out for 1-2 hours, when the fineness reaches 30 mu m, the materials in the ball milling tank are transferred into a high-speed dispersion machine, salicylic acid, the second auxiliary agent and water are added, and the materials are stirred at high speed and dispersed uniformly, so that the rust removing and preventing liquid is obtained. The stirring speed was 100 r/min.
Example 5
Weighing the raw materials by using balance, wherein the specific mass of each raw material is as follows: 19g of CYDW-100 waterborne epoxy resin, 26.6g of auxiliary agent I, 7g of salicylic acid, 2g of zinc phosphate, 2g of zinc oxide, 6g of auxiliary agent II and 200g of water.
The first auxiliary agent is a waterborne epoxy curing agent CYDHD-220.
The auxiliary agent II is prepared from the following raw materials in parts by weight: 5g of sodium benzoate, 3g of urotropine, 2g of EDTA disodium salt and 60g of water; the preparation method comprises the steps of adding EDTA disodium salt into water, heating to 50 ℃, stirring for 20 minutes, adding other residual materials, and continuously stirring for 10 minutes to obtain the auxiliary agent II.
After weighing is finished, mixing and stirring the CYDW-100 aqueous epoxy resin and the first auxiliary agent uniformly, then transferring the mixture into a ball milling tank, adding water, zinc phosphate and zinc oxide, carrying out ball milling for 1-2 hours until the fineness reaches 30 mu m, transferring the substances in the ball milling tank into a high-speed dispersion machine, adding salicylic acid, the second auxiliary agent and water, and carrying out high-speed stirring and uniform dispersion to obtain the rust removing and preventing liquid. The stirring speed was 100 r/min.
The rust removing and preventing liquid prepared in the example 5 is respectively brushed on the surfaces of three rusty test pieces made of different materials and a steel test piece without rust for detection, and the surface appearance before brushing and after brushing for 2 hours is respectively shown in the attached figure 1 and the attached figure 2 of the specification.
The rust removing and preventing solution prepared in example 5 was applied by brush to the surface of a rusted steel workpiece, and was left indoors for 30 days without any significant rust mark.
From the detection results, the rust removing and preventing liquid prepared in example 5 has excellent rust removing effect and excellent rust preventing effect.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (6)
1. A rust removing and preventing liquid used before coating of steel workpieces is characterized in that: the composite material is prepared from the following raw materials in parts by weight: 16-19 parts of water-based epoxy resin, 22.4-26.6 parts of additive I, 6-7 parts of salicylic acid, 1-2 parts of zinc phosphate, 1-2 parts of zinc oxide, 5-6 parts of additive II and 200 parts of water.
2. The rust removing and preventing liquid as claimed in claim 1, which is characterized in that: the waterborne epoxy resin is CYDW-100 waterborne epoxy resin.
3. The rust removing and preventing liquid as claimed in claim 1, which is characterized in that: the first auxiliary agent is a waterborne epoxy curing agent CYDHD-220.
4. The rust removing and preventing liquid as claimed in claim 1, which is characterized in that: the auxiliary agent II is prepared from the following raw materials in parts by weight: 3-5 parts of sodium benzoate, 2-3 parts of urotropine, 1-2 parts of EDTA disodium salt and 54-60 parts of water.
5. The rust removing and preventing liquid as claimed in claim 4, which is characterized in that: the preparation method of the second auxiliary agent comprises the steps of adding EDTA disodium salt into water, heating to 50 ℃, stirring for 16-20 minutes, adding sodium benzoate, urotropine and water, and continuing stirring for 5-10 minutes to obtain the second auxiliary agent.
6. The rust removing and preventing liquid as claimed in any one of claims 1 to 5, which is characterized in that: the method comprises the following steps: and (2) uniformly mixing and stirring the aqueous epoxy resin and the first auxiliary agent, then transferring the mixture into a ball milling tank, adding water, zinc phosphate and zinc oxide, carrying out ball milling for 1-2 hours until the fineness reaches 30 mu m, transferring the substances in the ball milling tank into a high-speed dispersion machine, adding salicylic acid and the second auxiliary agent, and uniformly stirring and dispersing at a high speed to obtain the rust removing and preventing liquid.
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| CN202110945353.9A CN113637974A (en) | 2021-08-17 | 2021-08-17 | Rust removing and preventing liquid for steel workpiece before coating and preparation method thereof |
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| CN202110945353.9A CN113637974A (en) | 2021-08-17 | 2021-08-17 | Rust removing and preventing liquid for steel workpiece before coating and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115305474A (en) * | 2022-07-13 | 2022-11-08 | 宁波钢铁有限公司 | Cleaning method for nondestructively removing protective coating on steel surface and application |
| TWI812437B (en) * | 2022-08-30 | 2023-08-11 | 中國鋼鐵股份有限公司 | Method for rapidly evaluating surface discoloration of hot-dip galvanized steel |
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2021
- 2021-08-17 CN CN202110945353.9A patent/CN113637974A/en active Pending
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