CN114150319A - Water-based environment-friendly steel plate antirust treatment liquid and preparation and use methods thereof - Google Patents
Water-based environment-friendly steel plate antirust treatment liquid and preparation and use methods thereof Download PDFInfo
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- CN114150319A CN114150319A CN202111455031.2A CN202111455031A CN114150319A CN 114150319 A CN114150319 A CN 114150319A CN 202111455031 A CN202111455031 A CN 202111455031A CN 114150319 A CN114150319 A CN 114150319A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 title claims description 23
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 25
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 25
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 21
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 17
- LRWZZZWJMFNZIK-UHFFFAOYSA-N 2-chloro-3-methyloxirane Chemical compound CC1OC1Cl LRWZZZWJMFNZIK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 150000007524 organic acids Chemical class 0.000 claims abstract description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 14
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 10
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 10
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 claims description 10
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 claims description 10
- LWBHHRRTOZQPDM-UHFFFAOYSA-N undecanedioic acid Chemical compound OC(=O)CCCCCCCCCC(O)=O LWBHHRRTOZQPDM-UHFFFAOYSA-N 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- TVIDDXQYHWJXFK-UHFFFAOYSA-N dodecanedioic acid Chemical compound OC(=O)CCCCCCCCCCC(O)=O TVIDDXQYHWJXFK-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 5
- 235000011037 adipic acid Nutrition 0.000 claims description 5
- 239000001361 adipic acid Substances 0.000 claims description 5
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 5
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 4
- 238000006136 alcoholysis reaction Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 18
- 230000007797 corrosion Effects 0.000 abstract description 17
- 238000012360 testing method Methods 0.000 description 22
- 230000008569 process Effects 0.000 description 11
- 239000003921 oil Substances 0.000 description 7
- 239000003973 paint Substances 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 5
- QFGCFKJIPBRJGM-UHFFFAOYSA-N 12-[(2-methylpropan-2-yl)oxy]-12-oxododecanoic acid Chemical compound CC(C)(C)OC(=O)CCCCCCCCCCC(O)=O QFGCFKJIPBRJGM-UHFFFAOYSA-N 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 4
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- WZFUQSJFWNHZHM-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 WZFUQSJFWNHZHM-UHFFFAOYSA-N 0.000 description 1
- CONKBQPVFMXDOV-QHCPKHFHSA-N 6-[(5S)-5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-2-oxo-1,3-oxazolidin-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C[C@H]1CN(C(O1)=O)C1=CC2=C(NC(O2)=O)C=C1 CONKBQPVFMXDOV-QHCPKHFHSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Lubricants (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a water-based environment-friendly steel plate antirust treatment fluid and a preparation and use method thereof, wherein the water-based environment-friendly steel plate antirust treatment fluid comprises the following components in percentage by mass: 0.3 to 0.5 percent of binary organic acid, 0.9 to 1.5 percent of triethanolamine, 0.3 to 0.5 percent of polyvinyl alcohol, 0.1 to 0.15 percent of epoxy chloropropane, 0.6 to 1 percent of silica sol, 0.1 to 0.3 percent of sodium dodecyl sulfate and the balance of water. The water-soluble, low-concentration and uniformly-dispersed treatment fluid can quickly form a continuous anti-rust film with a certain thickness and excellent corrosion resistance on the surfaces of cold-rolled plates and hot-rolled plates, has a certain fingerprint resistance, and has small influence on the environment by treatment fluid preparation and treatment fluid components.
Description
Technical Field
The invention belongs to the technical field of steel plate surface anti-corrosion treatment, and particularly relates to a water-based environment-friendly steel plate antirust treatment liquid and a preparation and use method thereof.
Background
At present, in order to solve the problem that a steel plate is likely to be rusted in the long-term storage and transportation process, production enterprises generally coat rust-preventive oil on the surface of the steel plate, but the steel plate coated with the rust-preventive oil can cause some problems, such as core pulling and slipping phenomena in the process of coil feeding and coil discharging of a steel coil on a production line; meanwhile, energy consumption and environmental problems generated in the production process of the anti-rust oil also attract industrial attention, and the problems of oil mist and organic matter volatilization in the process section of coating the anti-rust oil on the steel plate and the environmental problems caused by oily wastewater generated by cleaning the anti-rust oil in the processing process of the steel plate are urgently solved. The environment-friendly water-based treatment process is adopted to replace the oil coating and corrosion prevention process, and the solution with development prospect is provided. The aqueous treatment technologies disclosed in the prior patents and articles are high in consumption for ensuring the complex concentration of film-forming covering components, certain chemical conversion film-forming technologies generally need a certain immersion time for ensuring the continuity of film-forming, and the general technologies do not have the lubricating capability required by steel plate forming.
Disclosure of Invention
In order to solve the problems, the invention provides a water-based environment-friendly steel plate antirust treatment liquid and a preparation and use method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: the water-based environment-friendly steel plate antirust treatment fluid comprises the following components in percentage by mass: 0.3 to 0.5 percent of binary organic acid, 0.9 to 1.5 percent of triethanolamine, 0.3 to 0.5 percent of polyvinyl alcohol, 0.1 to 0.15 percent of epoxy chloropropane, 0.6 to 1 percent of silica sol, 0.1 to 0.3 percent of sodium dodecyl sulfate and the balance of water.
Further, the dibasic organic acid is one or more of glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid and dodecanedioic acid of C5-C12.
Further, the alcoholysis degree of the polyvinyl alcohol is more than or equal to 98%, and the molecular weight is 70000-170000.
Further, the silica sol is alkaline silica sol with sol particles not greater than 20 nm.
The invention also provides a preparation method of the water-based environment-friendly steel plate antirust treatment fluid based on the components, which comprises the following steps:
heating part of water to 92-98 ℃, adding polyvinyl alcohol, cooling the solution to 40-50 ℃, adding triethanolamine, dissolving the triethanolamine, adding epoxy chloropropane, preserving heat for 7-9 hours, heating to 60-70 ℃, adding binary organic acid, dissolving the binary organic acid, cooling the solution to room temperature, sequentially adding sodium dodecyl sulfate and silica sol, adding the other part of water, and uniformly mixing to obtain the steel plate antirust treatment liquid.
Further, the preparation process adopts water bath heating and stirring in the whole process.
Furthermore, in the preparation method, the mass of the part of water heated first is 80-85% of the total mass of the water.
According to another aspect of the invention, the treatment fluid based on the components or the treatment fluid prepared by the preparation method is used, and when the treatment fluid is used, a steel plate is immersed in the treatment fluid for 5-10 s, taken out and dried by hot air, or the treatment fluid is coated on the surface of the steel plate and then naturally dried.
Compared with the prior art, the invention has the following beneficial effects:
(1) the treatment fluid is an aqueous system, has easily obtained raw materials, moderate component content, low cost, no chromium, no nitrate and nitrite, and no volatile organic substances, and meets the requirements of green chemistry and WEES & ROHS instructions;
(2) the treatment solution disclosed by the invention is uniform in film forming and covering on the surface of a steel plate, has good corrosion resistance and corrosion inhibition, the triethanolamine in the treatment solution can improve the solubility of the dibasic organic acid and has excellent corrosion inhibition on the steel plate, the triethanolamine and the dibasic organic acid can physically and chemically adsorb the surface of the steel plate to inhibit the adsorption of oxygen, the anodic oxidation overpotential on the surface of the steel plate is improved, the electrochemical reaction of oxygen absorption corrosion is inhibited, and a corrosion inhibition effect is achieved;
(3) the polyvinyl alcohol forms a cross-linked network on the surface of the steel plate in the film forming process of the treatment liquid, the corrosion inhibition components are uniformly distributed due to the limitation of network space, and the silicon sol particles are dispersed in the film forming process of the polyvinyl alcohol due to the hydrogen bond association between the polyvinyl alcohol and the silicon sol particles and the electrostatic repulsion between the sol particles, so that an anti-rust film with enough covering power can be formed on the rough surface of the steel plate. The polyvinyl alcohol subjected to the pre-crosslinking treatment of the epichlorohydrin has the advantages of high film forming speed, high film forming crosslinking degree, compact film forming, elasticity and strong corrosion resistance, the crosslinking speed and the crosslinking degree of a crosslinking network are improved by the reaction of hydroxyl groups of the dibasic organic acid and the polyvinyl alcohol in the film forming process, the alkalinity of the surface of the steel plate is further improved along with the gradual volatilization of moisture, the crosslinking speed of the polyvinyl alcohol is correspondingly accelerated, the discharge of water is accelerated, a positive feedback film forming acceleration mechanism is formed, and the film forming speed is improved;
(4) the surfactant sodium dodecyl sulfate of the treatment fluid is a dispersant with high stability in an alkaline environment, has good compatibility with a treatment fluid system, and is beneficial to improving the stability of the treatment fluid and a film forming process of the treatment fluid. The silica sol particles uniformly dispersed in the treated film contribute to the improvement of fingerprint resistance.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The dibasic organic acid, triethanolamine, polyvinyl alcohol, epichlorohydrin, silica sol and sodium dodecyl sulfate adopted in the embodiment of the invention are industrial products; wherein the silica sol is alkaline silica sol with the average particle size of the sol particles being 15nm, the alcoholysis degree of polyvinyl alcohol is 99 percent, and the molecular weight is 170000.
The steel plates adopted in the embodiment of the invention are cold-rolled plates and pickled plates which are produced conventionally in industry.
The constant moist heat test in the examples of the present invention is GBT 2361-.
The steel plate samples after the constant damp-heat test in the embodiment of the invention are evaluated by adopting a rating method of test samples and test pieces after corrosion tests of metals and other inorganic coatings on GBT 6461-2002 metal substrates.
The adhesion test in the embodiment of the invention is a method test of a GB/T9286-1998 paint film marking test and a GB/T1720-.
Example 1
A water-based environment-friendly steel plate antirust treatment liquid comprises the following components in percentage by weight: 4g of dodecanedioic acid; 12g of triethanolamine; 4g of polyvinyl alcohol; 1.2g of epoxy chloropropane; 8g of silica sol; 2g of sodium dodecyl sulfate; 968.8g of water.
The preparation method of the water-based environment-friendly steel plate antirust treatment fluid comprises the following steps:
heating 800g of water bath to 98 ℃, adding polyvinyl alcohol, cooling the solution to 50 ℃, adding triethanolamine for dissolution, adding epoxy chloropropane for heat preservation for 8 hours after the triethanolamine is dissolved, heating to 70 ℃, adding dodecanedioic acid, dissolving the dodecanedioic acid, cooling the solution to room temperature, sequentially adding sodium dodecyl sulfate and silica sol, supplementing the rest water, and uniformly mixing to obtain the steel plate antirust treatment solution; stirring the whole preparation process.
The hot-rolled pickled plate was immersed in the treatment solution of this example for 5 seconds, and then taken out and blown to dry with hot air.
Example 2
A water-based environment-friendly steel plate antirust treatment liquid comprises the following components in percentage by weight: 2g of glutaric acid and 1g of undecanedioic acid; 9g of triethanolamine; 5g of polyvinyl alcohol; 1.5g of epoxy chloropropane; 7g of silica sol; 1g of sodium dodecyl sulfate; 973.5g of water.
The preparation method of the water-based environment-friendly steel plate antirust treatment fluid comprises the following steps:
heating 800g of water bath to 92 ℃, adding polyvinyl alcohol, cooling the solution to 40 ℃, adding triethanolamine, dissolving the triethanolamine, adding epoxy chloropropane, preserving heat for 7 hours, heating to 70 ℃, adding glutaric acid, undecanedioic acid, glutaric acid and undecanedioic acid, dissolving, cooling the solution to room temperature, sequentially adding sodium dodecyl sulfate and silica sol, supplementing the rest water, and uniformly mixing to obtain the steel plate antirust treatment solution; stirring the whole preparation process.
The cold-rolled sheet was immersed in the treatment liquid of this example for 5 seconds, taken out, and dried.
Example 3
A water-based environment-friendly steel plate antirust treatment liquid comprises the following components in percentage by weight: 3g of adipic acid and 2g of azelaic acid; 15g of triethanolamine; 5g of polyvinyl alcohol; 1.5g of epoxy chloropropane; 10g of silica sol; 3g of sodium dodecyl sulfate; 960.5g of water.
Heating 800g of water bath to 96 ℃, adding polyvinyl alcohol, cooling the solution to 50 ℃, adding triethanolamine for dissolution, adding epoxy chloropropane after the triethanolamine is dissolved, preserving heat for 8 hours, heating to 60 ℃, adding adipic acid, azelaic acid, adipic acid and azelaic acid for dissolution, cooling the solution to room temperature, sequentially adding sodium dodecyl sulfate and silica sol, supplementing the rest water, and uniformly mixing to obtain the steel plate antirust treatment solution; stirring the whole preparation process.
Coating an RDS 4# coating rod on a cold-rolled sheet and then drying by natural wind.
Example 4
A water-based environment-friendly steel plate antirust treatment liquid comprises the following components in percentage by weight: 2g of pimelic acid and 1.5g of suberic acid; 10g of triethanolamine; 3g of polyvinyl alcohol; 1g of epoxy chloropropane; 6g of silica sol; 3g of sodium dodecyl sulfate; 973.5g of water.
Heating 800g of water bath to 95 ℃, adding polyvinyl alcohol, cooling the solution to 50 ℃, adding triethanolamine, dissolving the triethanolamine, adding epoxy chloropropane, preserving heat for 7 hours, heating to 60 ℃, adding pimelic acid, suberic acid, dissolving pimelic acid and suberic acid, cooling the solution to room temperature, sequentially adding sodium dodecyl sulfate and silica sol, supplementing the rest water, and uniformly mixing to obtain the steel plate antirust treatment liquid; stirring the whole preparation process.
The cold-rolled sheet was immersed in the treatment liquid of this example for 6 seconds and then taken out and dried with hot air.
Example 5
A water-based environment-friendly steel plate antirust treatment liquid comprises the following components in percentage by weight: 4.5g of dodecanedioic acid; 14g of triethanolamine; 4g of polyvinyl alcohol; 1.2g of epoxy chloropropane; 9g of silica sol; 2.5g of sodium dodecyl sulfate; 964.8g of water.
Heating 800g of water bath to 92 ℃, adding polyvinyl alcohol, cooling the solution to 50 ℃, adding triethanolamine, dissolving the triethanolamine, adding epoxy chloropropane, preserving heat for 7 hours, heating to 70 ℃, adding dodecanedioic acid, dissolving the dodecanedioic acid, cooling the solution to room temperature, sequentially adding sodium dodecyl sulfate and silica sol, supplementing the remaining water, and uniformly mixing to obtain the steel plate antirust treatment liquid; stirring the whole preparation process.
The pickled plate was immersed in the treatment solution of this example for 6 seconds, and then taken out and dried with hot air.
Test methods of examples
1. The constant moist heat test was carried out according to the moist heat test method of GBT 2361-.
Table 1 example constant moist heat test results
According to the grading method of GBT 6461-2002, the corrosion degree of the surface of the test piece is classified into 10 grades to 0 grades from no corrosion to more than 50% area corrosion. The samples prepared in the five examples have no surface change rating of 10 grades after 24h constant damp and hot test, slight corrosion appears on the surface after 48h constant damp and hot test, the surface corrosion areas of the examples 1, 3, 4 and 5 are rated as 5 grades when the surface corrosion areas are more than 1% and less than 2.5%, and the surface corrosion areas of the examples 2 are rated as 4 grades when the surface corrosion areas are more than 2.5% and less than 5%.
2. The epoxy resin paint coated in the above examples is operated according to the scribing test of GB/T9286-1998 color paint and varnish paint film and the scribing test of GB/T1720-2020 paint film, and the test results are listed in Table 2.
Table 2 examples test results after coating
| Example numbering | Scoring adhesion (grade) | Drawing circle adhesion (grade) |
| Example 1 | 1 | 1 |
| Example 2 | 1 | 1 |
| Example 3 | 1 | 1 |
| Example 4 | 1 | 1 |
| Example 5 | 1 | 1 |
The five examples described above all rated a 1 rating of less than 5% of the area of damage to the millimeter-wave undercoating following the test of GB/T9286-1998 and adhered and torn off with 3M tape. After the paint film circling test according to GB/T1720-2020, the adhesion grades of the five examples are all 1 grade according to the integrity degree of the paint film in the scratch range of the round rolling line.
3. The steel plate prepared in the embodiment is used for testing the difference delta E before and after the vaseline coating, and the test result is listed in Table 3.
TABLE 3 results of the fingerprint resistance test of the examples
| Example numbering | ⊿E |
| Example 1 | 0.28 |
| Example 2 | 0.63 |
| Example 3 | 0.85 |
| Example 4 | 0.68 |
| Example 5 | 0.35 |
Generally, the color difference delta E < 2 is fingerprint resistance, and delta E < 1 indicates that the coating has excellent fingerprint resistance; Δ E <0.25 is an ideal matching range with very little or no color difference, and is excellent in fingerprint resistance. As can be seen from the data of table 3, the color difference values of the above five examples are each more than 0.25 and less than 1, and the treated films of the examples have excellent fingerprint resistance.
The technical idea of the present invention is described in the above technical solutions, and the protection scope of the present invention is not limited thereto, and any changes and modifications made to the above technical solutions according to the technical essence of the present invention belong to the protection scope of the technical solutions of the present invention.
Claims (8)
1. The water-based environment-friendly steel plate antirust treatment fluid is characterized by comprising the following components in percentage by mass: 0.3 to 0.5 percent of binary organic acid, 0.9 to 1.5 percent of triethanolamine, 0.3 to 0.5 percent of polyvinyl alcohol, 0.1 to 0.15 percent of epoxy chloropropane, 0.6 to 1 percent of silica sol, 0.1 to 0.3 percent of sodium dodecyl sulfate and the balance of water.
2. The water-based environment-friendly steel plate rust-preventing treatment liquid as claimed in claim 1, wherein the dibasic organic acid is one or more of glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid and dodecanedioic acid of C5-C12.
3. The water-based environment-friendly steel plate rust-proof treatment liquid as claimed in claim 1, wherein the alcoholysis degree of polyvinyl alcohol is not less than 98%, and the molecular weight is 70000-170000.
4. The water-based environment-friendly steel plate rust-inhibiting treatment liquid as claimed in claim 1, wherein the silica sol is an alkaline silica sol having sol particles of not more than 20 nm.
5. A preparation method of the water-based environment-friendly steel plate antirust treatment liquid based on any one of claims 1 to 4 is characterized by comprising the following steps of: heating part of water to 92-98 ℃, adding polyvinyl alcohol, cooling the solution to 40-50 ℃, adding triethanolamine, dissolving the triethanolamine, adding epoxy chloropropane, preserving heat for 7-9 hours, heating to 60-70 ℃, adding binary organic acid, dissolving the binary organic acid, cooling the solution to room temperature, sequentially adding sodium dodecyl sulfate and silica sol, adding the other part of water, and uniformly mixing to obtain the steel plate antirust treatment liquid.
6. The preparation method of the water-based environment-friendly steel plate rust-proof treatment liquid as claimed in claim 5, wherein the preparation process adopts water bath heating and stirring.
7. The preparation method of the water-based environment-friendly steel plate rust-proof treatment liquid as claimed in claim 5, wherein the mass of the part of the water heated first is 80-85% of the total mass of the water.
8. The use method of the water-based environment-friendly steel plate antirust treatment fluid is characterized by comprising the following steps of: when the treatment solution according to claim 1 or the treatment solution prepared by the preparation method according to claim 5 is used, the steel plate is immersed in the treatment solution for 5 to 10 seconds, taken out and dried by hot air; or coating the treatment liquid on the surface of the steel plate and then naturally drying.
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