CN117757332A - Thick film long-acting anti-corrosion material under low surface treatment condition - Google Patents
Thick film long-acting anti-corrosion material under low surface treatment condition Download PDFInfo
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- 238000005260 corrosion Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 title claims abstract description 24
- 238000004381 surface treatment Methods 0.000 title claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims abstract description 27
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003973 paint Substances 0.000 claims abstract description 10
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 9
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 claims abstract description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 8
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 7
- 239000001023 inorganic pigment Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- -1 sulfonate ions Chemical class 0.000 claims description 14
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 11
- 230000007797 corrosion Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 16
- 238000000576 coating method Methods 0.000 abstract description 16
- 239000000126 substance Substances 0.000 abstract description 6
- 235000010215 titanium dioxide Nutrition 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004925 Acrylic resin Substances 0.000 abstract description 2
- 229920000178 Acrylic resin Polymers 0.000 abstract description 2
- 238000005536 corrosion prevention Methods 0.000 abstract description 2
- 229920005749 polyurethane resin Polymers 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- LCFVJGUPQDGYKZ-UHFFFAOYSA-N Bisphenol A diglycidyl ether Chemical compound C=1C=C(OCC2OC2)C=CC=1C(C)(C)C(C=C1)=CC=C1OCC1CO1 LCFVJGUPQDGYKZ-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 235000010265 sodium sulphite Nutrition 0.000 description 4
- 238000006277 sulfonation reaction Methods 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920000768 polyamine Polymers 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006845 Michael addition reaction Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000009974 thixotropic effect Effects 0.000 description 2
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- ZJRAAAWYHORFHN-UHFFFAOYSA-N 2-[[2,6-dibromo-4-[2-[3,5-dibromo-4-(oxiran-2-ylmethoxy)phenyl]propan-2-yl]phenoxy]methyl]oxirane Chemical compound C=1C(Br)=C(OCC2OC2)C(Br)=CC=1C(C)(C)C(C=C1Br)=CC(Br)=C1OCC1CO1 ZJRAAAWYHORFHN-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- XUCHXOAWJMEFLF-UHFFFAOYSA-N bisphenol F diglycidyl ether Chemical compound C1OC1COC(C=C1)=CC=C1CC(C=C1)=CC=C1OCC1CO1 XUCHXOAWJMEFLF-UHFFFAOYSA-N 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 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 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a thick film long-acting anti-corrosion material under the condition of low surface treatment in the field of anti-corrosion coating, which is formed by mixing a component A and a component B, spraying the mixture on the surface of a metal substrate and curing the mixture; the component A contains modified epoxy resin, hydrophobic fumed silica, inorganic pigment, rutile type titanium white, propylene glycol monomethyl ether and superfine zinc powder; the component B contains 2,4, 6-tris (dimethylaminomethyl) phenol; ethylenediamine; the balance of mixed auxiliary agent isopropanol; the weight content of the components A and B is as follows: 85-90% of A component; 10-15% of component B. The long-acting anti-corrosion material of the formula is usually used as a paint primer, has good chemical bonding effect with a base material, is matched with acrylic resin and polyurethane resin finish paint, and can be used for corrosion prevention of ships, ocean engineering equipment and field pipeline equipment.
Description
Technical Field
The invention relates to an anti-corrosion coating, in particular to a coating with a long-acting anti-corrosion function.
Background
In the Chinese patent database, a flexible epoxy anticorrosive paint is disclosed, and the publication number is: CN101260273a, publication date: 20080910 the anticorrosive paint consists of epoxy resin 20-69 wt%, antirust pigment and stuffing 20-69 wt%, modifying and curing agent 10-30 wt%, additive 0.5-3 wt% and diluent 0-30 wt%.
Wherein the epoxy resin is one or more of bisphenol A diglycidyl ether, tetrabromobisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, bisphenol F diglycidyl ether and bisphenol S diglycidyl ether.
The antirust pigment and filler is one or a mixture of more of mica powder, silica micropowder, titanium dioxide, mica ferric oxide, iron oxide red, zinc yellow, aluminum tripolyphosphate, zinc phosphate, zinc oxide, precipitated barium sulfate, talcum powder, fumed silica, aluminum powder and zinc powder.
The modified curing agent is a Michael addition product prepared by a Michael addition reaction of aliphatic polyamine and acrylic acid oligomer, wherein the aliphatic polyamine is one or a mixture of more than one of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine or polyethylene polyamine.
The additive is one or a mixture of a plurality of curing accelerator, dispersant, defoamer, flatting agent and anti-sedimentation agent.
The coating has good adhesive force and corrosion resistance, and has good toughness, and particularly, the toughness of the coating after seawater soaking is greatly improved compared with that of the conventional epoxy coating.
The defects are that: the coating has certain anti-corrosion performance, but the coating has good adhesive force only by cleaning the surface of the substrate in advance, so that the application of the coating is limited when the coating is implemented in the field.
Disclosure of Invention
The invention aims to provide a thick film long-acting anti-corrosion material under the condition of low surface treatment, so that a coating with good adhesive force and anti-corrosion performance can be obtained under the condition of low surface treatment.
The purpose of the invention is realized in the following way: the long-acting thick film anti-corrosion material is formed by mixing a component A and a component B, spraying the mixture on the surface of a metal substrate and curing the mixture;
the component A contains modified epoxy resin, hydrophobic fumed silica, inorganic pigment, rutile type titanium white, propylene glycol monomethyl ether and superfine zinc powder.
The weight content of each component is as follows:
50.8-61.2% of modified epoxy resin, wherein the modified epoxy resin is low-sulfonic acid modified bisphenol A diglycidyl ether; wherein the ratio of the total mass of sulfonate ions to the total mass of the modified epoxy resin is (3-5): 100. the epoxy resin has the structure that hydroxyl, ether and very active epoxy groups exist, the hydroxyl and the ether have high polarity, so that epoxy molecules and adjacent interfaces generate stronger intermolecular acting force, the epoxy groups react with free bonds on the metal surface to form chemical bonds, the epoxy resin has high bonding strength, and the hydrophilicity and the dispersibility of the epoxy resin are improved after sulfonation modification.
3-4% of hydrophobic fumed silica; fumed silica is an ultra-fine inorganic new material, and has small particle size, large specific surface area, strong surface adsorption force, large surface energy, high chemical purity, good dispersion performance, and excellent stability, reinforcement, thickening property and thixotropic property. The addition of the thickening epoxy resin;
10-15% of inorganic pigment, wherein the pigment is ferrous oxide or silver aluminum paste powder;
5.8 to 6.2 percent of rutile titanium dioxide; the addition of the rutile type titanium dioxide has the advantages of high covering power and strong tinting strength, and can also enhance the mechanical strength and adhesive force of a paint film, prevent cracks, prevent ultraviolet rays and moisture from penetrating, and prolong the service life of the paint film;
12-14% of propylene glycol monomethyl ether is used as an anti-scaling auxiliary agent, and meanwhile, the film forming temperature can be reduced, and the condensation film forming can be promoted;
8-10% of superfine zinc powder and 200-800 meshes; the zinc powder can form a sealing layer to strengthen the protection of the substrate, the formation of corrosion products on the surface of the metal substrate can reduce the potential difference between the coating and the substrate, after the coating is damaged, a new metal zinc layer is exposed, the potential difference is rapidly increased, a strong cathodic protection effect is generated, and the corrosion resistance of the substrate is greatly enhanced;
the component B comprises the following components in parts by weight: 10-15% of 2,4, 6-tris (dimethylaminomethyl) phenol; 5-8% of ethylenediamine; the balance of mixed auxiliary agent isopropanol; 2,4, 6-tris (dimethylaminomethyl) phenol and ethylenediamine are thixotropic auxiliary agents, and the two are synergistic, so that the modified epoxy resin is cured, and the cured epoxy resin has high adhesive force and is not easy to crack;
the weight content of the components A and B is as follows: 85-90% of A component; 10-15% of component B.
Compared with the prior art, the invention has the beneficial effects that: the thick film long-acting corrosion-resistant material sprayed on the surface of the substrate, which is obtained by the invention, does not need to deeply clean the surface of the substrate, can be directly sprayed under the condition that the oxidation degree of the surface of a machine body is not high, and the sulfonate in the modified epoxy resin is subjected to chemical reaction with rust on the surface of steel, so that the rust removal effect is achieved, and meanwhile, the sulfonate is reacted with iron to generate ferrous sulfonate and hydrogen, so that the effect of roughening the surface of the steel is achieved, and the epoxy resin and the steel body can be subjected to weak chemical reaction to form chemical bonds, so that the epoxy resin can be firmly adhered to the surface of a metal substrate after being solidified. The coating of the thick film long-acting anti-corrosion material obtained based on the method has the advantages of high adhesive force, good oxidation resistance and long-term protection of the surface of the metal substrate. The long-acting anti-corrosion material of the formula is usually used as a paint primer, has good chemical bonding effect with a base material, is matched with acrylic resin and polyurethane resin finish paint, and can be used for corrosion prevention of ships, ocean engineering equipment and field pipeline equipment.
Further, the metal base material is steel, and the spraying thickness is 0.2-3mm.
Further, the curing temperature of the paint sprayed on the surface of the metal substrate is 10-40 ℃ and the curing time is 2-48 hours.
Further, the component A is fully stirred before being used, then the component B is added into the component A to be continuously stirred for 5 to 15 minutes, and then the mixture is sprayed on the surface of the metal substrate.
Detailed Description
Example 1
The long-acting thick film anti-corrosion material is formed by mixing a component A and a component B, spraying the mixture on the surface of a metal substrate and curing the mixture;
the component A contains modified epoxy resin, hydrophobic fumed silica, inorganic pigment, rutile type titanium white, propylene glycol monomethyl ether and superfine zinc powder.
The weight content of each component in the component A is as follows:
61.2% of modified epoxy resin, wherein the modified epoxy resin is low-sulfonic acid modified bisphenol A diglycidyl ether; the low-sulfonic acid modified bisphenol A diglycidyl ether is obtained by sulfonation reaction of sodium sulfite and bisphenol A diglycidyl ether, and the dosage of sodium sulfite is adjusted so that the ratio of the total mass of sulfonate ions to the total mass of modified epoxy resin is (3-5): 100, a modified bisphenol a diglycidyl ether having a low degree of sulfonation can be formed; the ratio of the total mass of sulfonate ions to the total mass of the modified epoxy resin employed in this example was 5:100 low sulfonic acid modified bisphenol a diglycidyl ether;
3% of hydrophobic fumed silica;
10% of an inorganic pigment, wherein the pigment is ferrous oxide;
5.8% of rutile titanium dioxide;
propylene glycol monomethyl ether 12% as an anti-rust auxiliary;
8% of superfine zinc powder, 200-800 meshes;
the component B comprises the following components in parts by weight: 12% of 2,4, 6-tris (dimethylaminomethyl) phenol; ethylene diamine 8%; the balance of mixed auxiliary agent isopropanol;
the weight content of the components A and B is as follows: 85% of a component A; 15% of a component B;
before the component A is used, the component A is fully stirred, then the component B is added into the component A, and the mixture is sprayed on the surface of the metal substrate after the mixture is continuously stirred for 5 to 15 minutes. Specifically: the metal substrate adopts a carbon steel plate which is naturally stored for 60 days under the conditions of 25 ℃ and 60% constant humidity air, then the surface of the carbon steel plate is simply brushed off by a steel wire brush, and then a coating with the total thickness of 0.2-3mm is sprayed on the steel plate for 3-5 times; the curing temperature after spraying is 40 ℃ and the curing time is 24 hours, so that the thick film long-acting anti-corrosion material coating sprayed on the surface of the carbon steel plate is obtained.
Examples 2 to 6
The weight amounts of the respective substances in the A component in examples 1 to 6 are shown in the following Table
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Modified epoxy resin | 61.2 | 50.8 | 57 | 55 | 56.2 | 57.8 |
| Hydrophobic fumed silica | 3 | 4 | 4 | 3 | 4 | 3 |
| Ferrous oxide | 10 | 15 | 0 | 0 | 11 | 12 |
| Silver aluminium paste powder | 0 | 0 | 10 | 15 | 0 | 0 |
| Rutile type titanium dioxide | 5.8 | 6.2 | 6 | 6 | 5.8 | 6.2 |
| Propylene glycol monomethyl ether | 12 | 14 | 14 | 12 | 13 | 13 |
| Superfine zinc powder | 8 | 10 | 9 | 9 | 10 | 8 |
The components and amounts of the B components corresponding to examples 2 to 6 are the same as in example 1.
The low sulfonic acid modified bisphenol A diglycidyl ether in examples 4-6 is obtained by sulfonation of sodium sulfite and bisphenol A diglycidyl ether, and the molar ratio of sodium sulfite to bisphenol A diglycidyl ether is 1:15.
the weight amounts of the A component and the B component are the same as in example 1.
The mechanical properties of the thick film long-acting corrosion-resistant materials of examples 1 to 6 thus obtained were as follows:
examples 1-6 were subjected to a cyclic immersion test, with cyclic immersion and drying in tap water, with 12 hours immersion and 12 hours drying alternating, and cross-cut 10 x 10mm, after a period of time, the maximum size of erosion along the edges of the cross-cut lines toward the center was measured, and the conclusion is shown in the following table:
| time (day) required for erosion 1mm | Time (day) required for erosion 2mm | |
| Example 1 | 48 | 82 |
| Example 2 | 47 | 80 |
| Example 3 | 52 | 90 |
| Example 4 | 43 | 73 |
| Example 5 | 47 | 78 |
| Example 6 | 40 | 72 |
Examples 1-6 were subjected to a brine soaking test to simulate the environment conditions of a brine soaking, and the conclusions are shown in the following table:
| time (day) required for erosion 1mm | Time (day) required for erosion 2mm) | |
| Example 1 | 38 | 58 |
| Example 2 | 36 | 67 |
| Example 3 | 40 | 59 |
| Example 4 | 32 | 52 |
| Example 5 | 38 | 57 |
| Example 6 | 33 | 54 |
Example 7
Based on example 1, only the weight ratio of the amount of the A component to the amount of the B component was changed to obtain the results shown in the following table:
the table above shows that: 85-90% of A component; when the component B accounts for 10 to 15 percent, the adhesive force of the thick film long-acting anti-corrosion material is large. The excessive or too small usage of the component B as a curing agent can lead to the reduction of the adhesive force of the thick film long-acting anti-corrosion material.
Example 8
Screening of the amount of 2,4, 6-tris (dimethylaminomethyl) phenol based on example 1, the amount of 2,4, 6-tris (dimethylaminomethyl) phenol in the B component was changed only to obtain the results shown in the following table:
the results show that the amount of 2,4, 6-tris (dimethylaminomethyl) phenol is preferably 10-15%.
Screening of the amount of ethylenediamine on the basis of example 1, only the amount of ethylenediamine in the B component was changed to obtain the results shown in the following table:
the results show that; the preferred range of ethylenediamine weight is 5-8%.
Example 9
And screening the ratio of the total mass of sulfonate ions to the total mass of the modified epoxy resin, and performing an adhesive force test and a salt spray test on the obtained coating.
Wherein, the salt spray test adopts the standard GB/T6461-2002; the required equipment comprises a spray nozzle, a salt water bucket, a test piece bracket, a spray liquid collecting container, a salt water replenishing bucket, a pressure bucket, a compressed air supply device, an exhaust device and the like, and the spray horizontal area is 80cm 2 A diameter of about 10cm, placed near the sample; the amount of spray liquid was calculated in whole hours with an area of 80cm 2 The salt fog settlement amount continuously atomized for 8 hours is collected by the funnel, average hourly should be collected1.6mL of solution. In the test, the concentration of the sodium chloride solution in the salt water barrel is maintained to be 40-60 g/l. The pH value of the salt solution before atomization is 6.5-7.2, the temperature is 35+/-2 ℃, the sample is observed after spraying for 48 hours, and the defect area occupies the whole test area and is taken as the test content
The test results are shown in the following table:
the test results show that the adhesive force is obviously reduced due to the reduction of the sulfonate ion, and when the sulfonate ion is increased, the salt spray resistance is reduced due to the certain hydrophilicity of the sulfonate ion, and the ratio of the total mass of the sulfonate ion to the total mass of the modified epoxy resin is preferably (3-5): 100.
the invention is not limited to the above embodiments, and based on the technical solution disclosed in the invention, a person skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the technical content disclosed, and all the substitutions and modifications are within the protection scope of the invention.
Claims (4)
1. A thick film long-acting anti-corrosion material under the condition of low surface treatment is characterized in that: the thick film long-acting anti-corrosion material is formed by mixing a component A and a component B, spraying the mixture on the surface of a metal substrate and curing the mixture;
in the component A, the weight content of each component is as follows:
50.8-61.2% of modified epoxy resin, wherein the modified epoxy resin is low-sulfonic acid modified bisphenol A diglycidyl ether; wherein the ratio of the total mass of sulfonate ions to the total mass of the modified epoxy resin is (3-5): 100;
3-4% of hydrophobic fumed silica;
10-15% of inorganic pigment, wherein the pigment is ferrous oxide or silver aluminum paste powder;
5.8 to 6.2 percent of rutile titanium dioxide;
12-14% of propylene glycol monomethyl ether serving as an anti-rust auxiliary agent;
8-10% of superfine zinc powder and 200-800 meshes;
the component B comprises the following components in parts by weight: 10-15% of 2,4, 6-tris (dimethylaminomethyl) phenol; 5-8% of ethylenediamine; the balance of mixed auxiliary agent isopropanol;
the weight content of the components A and B is as follows: 85-90% of A component; 10-15% of component B.
2. The long-acting thick film corrosion preventing material under the condition of low surface treatment according to claim 1, wherein: the metal base material is steel, and the spraying thickness is 0.2-3mm.
3. The long-acting thick film corrosion preventing material under the condition of low surface treatment according to claim 1, wherein: the curing temperature of the paint sprayed on the surface of the metal substrate is 10-40 ℃ and the curing time is 2-48 hours.
4. The long-acting thick film corrosion preventing material under the condition of low surface treatment according to claim 1, wherein: before the component A is used, the component A is fully stirred, then the component B is added into the component A, and the mixture is sprayed on the surface of the metal substrate after the mixture is continuously stirred for 5 to 15 minutes.
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