CN114656357A - Rust fixing material, low-surface treatment coating, preparation method of coating and coating process - Google Patents
Rust fixing material, low-surface treatment coating, preparation method of coating and coating process Download PDFInfo
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- CN114656357A CN114656357A CN202011537608.XA CN202011537608A CN114656357A CN 114656357 A CN114656357 A CN 114656357A CN 202011537608 A CN202011537608 A CN 202011537608A CN 114656357 A CN114656357 A CN 114656357A
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- Prior art keywords
- rust
- coating
- fixing material
- diol
- surface treatment
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- 239000000463 material Substances 0.000 title claims abstract description 39
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000000576 coating method Methods 0.000 title claims description 82
- 239000011248 coating agent Substances 0.000 title claims description 71
- 238000004381 surface treatment Methods 0.000 title claims description 40
- 150000002009 diols Chemical class 0.000 claims abstract description 30
- 239000000126 substance Substances 0.000 claims abstract description 30
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 229940074391 gallic acid Drugs 0.000 claims abstract description 13
- 235000004515 gallic acid Nutrition 0.000 claims abstract description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 10
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000008107 benzenesulfonic acids Chemical class 0.000 claims abstract description 4
- 239000000376 reactant Substances 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical group CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000002518 antifoaming agent Substances 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 13
- 239000007822 coupling agent Substances 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000011527 polyurethane coating Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- RBNPOMFGQQGHHO-UHFFFAOYSA-N glyceric acid Chemical compound OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 claims description 6
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical group OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 5
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical group CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 4
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- UWJJYHHHVWZFEP-UHFFFAOYSA-N pentane-1,1-diol Chemical group CCCCC(O)O UWJJYHHHVWZFEP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims description 2
- 229940043375 1,5-pentanediol Drugs 0.000 claims description 2
- 229940051250 hexylene glycol Drugs 0.000 claims description 2
- WCVRQHFDJLLWFE-UHFFFAOYSA-N pentane-1,2-diol Chemical compound CCCC(O)CO WCVRQHFDJLLWFE-UHFFFAOYSA-N 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 17
- 230000007797 corrosion Effects 0.000 abstract description 16
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 13
- 239000003973 paint Substances 0.000 abstract description 10
- 239000011159 matrix material Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 239000003518 caustics Substances 0.000 abstract description 3
- 230000009920 chelation Effects 0.000 abstract description 3
- 238000005886 esterification reaction Methods 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 229910021645 metal ion Inorganic materials 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 14
- 238000001723 curing Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000012855 volatile organic compound Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 7
- 238000007739 conversion coating Methods 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 239000001263 FEMA 3042 Substances 0.000 description 6
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 6
- 235000015523 tannic acid Nutrition 0.000 description 6
- 229940033123 tannic acid Drugs 0.000 description 6
- 229920002258 tannic acid Polymers 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000008096 xylene Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 229910021389 graphene Inorganic materials 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 150000002505 iron Chemical class 0.000 description 2
- 150000002506 iron compounds Chemical class 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- 230000007794 irritation Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 235000019832 sodium triphosphate Nutrition 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229940116007 ferrous phosphate Drugs 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910000155 iron(II) phosphate Inorganic materials 0.000 description 1
- SDEKDNPYZOERBP-UHFFFAOYSA-H iron(ii) phosphate Chemical compound [Fe+2].[Fe+2].[Fe+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O SDEKDNPYZOERBP-UHFFFAOYSA-H 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013008 moisture curing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2451/00—Type of carrier, type of coating (Multilayers)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2503/00—Polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
Abstract
The utility model discloses a preparation method of a rust-fixing material, which is prepared by taking gallic acid and diol substances as reactants and taking benzenesulfonic acid derivatives or concentrated sulfuric acid as a catalyst for synthesis, wherein the diol substances are diols with the C atom number being more than or equal to 3. The needed gallic acid is extracted from plants, so that the method is ecological and environment-friendly, and the diol substances and the catalyst are common substances, are easy to obtain and are ecological and environment-friendly; the method takes gallic acid as a main body, utilizes acid catalytic esterification reaction to enable glycol substances to react with carboxyl in the gallic acid to generate a stable rust fixing material, and forms a stable gallic acid-metal (or iron) complex through strong chelation with metal ions, so that metal rust is fixed to form a closed structure, external corrosive substances are prevented from flowing into a metal matrix, and corrosion is inhibited; the diol having 3 or more carbon atoms is used as the diol, and the rust-fixing material has good solubility in the resin and can be easily mixed with the resin to form a paint.
Description
Technical Field
The utility model relates to the technical field of anticorrosive coatings, in particular to a rust fixing material, a low-surface treatment coating, a preparation method thereof and a coating process.
Background
Various corrosion damages inevitably occur in the actual use process of the metal material, and the service life and the service safety of the metal material are seriously influenced. To slow down the corrosion of metals, cathodic protection, the application of anticorrosive coatings, the use of chemical agents, etc. are often used. The coating protection is the most extensive, effective and economical method by combining the prior art and the cost factor. However, the method has the persistent problem of environmental pollution in the implementation process.
Traditional coatings cause severe pollution: firstly, still can produce a large amount of rust dust and smog at surface treatment's in-process, can cause harm to constructor and surrounding environment, and second, coating itself comprises the stronger organic matter of toxicity that can volatilize, constitutes great threat to construction, maintainer personal safety to cause very big pollution to the environment. Moreover, the traditional coating is complex in coating construction and multiple in steps. A series of surface treatment processes such as sand blasting, shot blasting and the like are mostly needed before coating of the traditional coating, for some equipment which is limited by sites and has a complex structure, the surface treatment cost is higher, and the fatal defect that the coating fails due to the fact that a plurality of rust removing equipment cannot be used for treatment exists. Therefore, the development of environment-friendly and efficient low-surface treatment coating is extremely important.
And the traditional low surface treatment coating has poor anticorrosive effect. Most of the traditional low-surface treatment coating is single-layer rust conversion coating, and the single coating usually has larger micropore defects, so that the single coating has poor effect in the service process. Often after several months of service, a source of corrosion develops, causing corrosion pitting, resulting in corrosion failure.
The related prior art is as follows:
the utility model discloses a low surface treatment coating and a preparation method thereof, wherein a mixture of tannic acid and phosphoric acid is used as a conversion agent, epoxy phosphate is used as a film forming substance, a plasticizer dibutyl phthalate, an organic solvent xylene and the like are added to synthesize the low surface treatment coating, the conversion agent in the coating and rust undergo a chemical reaction to convert harmful rust into a harmless or useful complex, phosphoric acid and rust react to generate ferrous phosphate, and the film layer of the coating is firmly attached and has the effects of anodization and corrosion inhibition passivation. However, the concentration of tannic acid and phosphoric acid is not easy to control, too little of tannic acid and phosphoric acid cannot play a role in protection, and too much of tannic acid and phosphoric acid can cause corrosion.
The utility model discloses a low-surface-treatment moisture-curing heavy-duty anticorrosive coating, which is prepared by taking bisphenol A type low-molecular-weight epoxy resin as a film forming substance, adding a wetting dispersant, a defoaming agent, an antirust pigment, an organic solvent and the like in proportion and stirring. The paint penetrates into the coating to divide and surround rust, and P3O 105-and PO 43-in the active pigment can be complexed with polar groups (-OH, -COOH) in a film forming matter to form stable cross-linking compounds, and can be further complexed with Fe, Fe2+ and Fe3+ to form a stable protective film on the metal surface, so that the antirust effect is achieved. The utility model uses the mixed solution of xylene and n-butanol as solvent, adopts construction processes such as brush coating and spray coating, but the coating needs to be maintained for 14 days at standard room temperature after being coated, and the construction period is longer.
In publication "coating industry" 2019-05, epoxy resin is used as a film forming matrix, and fillers such as graphene, aluminum tripolyphosphate and talcum powder are added to prepare the low-surface-treatment graphene heavy-duty anticorrosive coating. The graphene serving as a carbon material has a unique two-dimensional lamellar structure, excellent conductivity and shielding property, and is low in density, so that a considerable scale shielding effect can be realized. The aluminum tripolyphosphate and the talcum powder can properly reduce construction conditions, wherein P3O 105-and PO 43-can form stable cross-linking compounds by complexing with polar groups in a film forming material, and can also form chelates with Fe3+ and Fe2+ to form a stable protective film, so that a good shielding effect is achieved. Although the coating may reduce the surface treatment, the substrate surface still needs to be grit blasted to a Sa2.5 rating.
By combining the problems, the research on the low-surface treatment coating which is environment-friendly, long-acting, short in construction period and good in anti-corrosion effect has very important practical significance.
Disclosure of Invention
The utility model aims to provide a rust-fixing material and paint for preparing an environment-friendly low-surface-treatment paint, a preparation method thereof and a paint process.
The technical problem solved by the utility model is realized by adopting the following technical scheme:
the rust-fixing material is prepared by taking gallic acid and a diol substance as reactants and taking benzenesulfonic acid derivatives or concentrated sulfuric acid as a catalyst, wherein the diol substance is a diol with a C atom number of more than or equal to 3, and the reaction is as follows:
wherein R represents a carbon chain having 1 or more carbon atoms in the diol, and A represents the catalyst.
Preferably, the diol is propylene glycol, butylene glycol, pentylene glycol or hexylene glycol.
Preferably, the diol is pentanediol, and the catalyst is a benzenesulfonic acid derivative, and the reaction is as follows:
the preparation method of the rust fixing material provided by the utility model has the following technical effects:
the gallic acid required by the preparation is extracted from plants, is ecological and environment-friendly, has a simple preparation process, is free of benzene solvents such as xylene, has low VOC content and low irritation, is easy to obtain, is free of diol substances and catalysts, and can reduce the influence of volatile organic compounds on constructors and the environment; the method can solve the problem that the concentration of tannic acid and phosphoric acid in the traditional rust conversion coating is difficult to control, takes gallic acid as a main body, utilizes acid catalytic esterification reaction to enable glycol substances to react with carboxyl in the gallic acid to generate stable rust fixing materials, and forms stable gallic acid-metal (or iron) complexes with metal ions (especially iron ions) through strong chelation, thereby fixing metal rusty substances, forming a closed structure, preventing external corrosive substances from flowing into a metal matrix and inhibiting corrosion; the diol having 3 or more carbon atoms is used as the diol, and this makes the rust-fixing material soluble in the resin and easy to mix with the resin to form a paint.
Preferably, the diol is available in a wide variety of types and is readily available.
Preferably, the catalyst is selected from benzenesulfonic acid derivatives, the reaction activity is high, side reactions such as oxidation and carbon formation are avoided, the purity of the obtained product is high, the corrosion to equipment is light, and the pollution is small.
The utility model also provides a rust-fixing material prepared by the preparation method, the rust-fixing material is prepared by any one of the preparation methods, and the chemical formula is as follows:
it has the same technical effects.
The utility model also provides a low-surface treatment coating which comprises the following components in parts by mass: 45-65 parts of epoxy resin, 2-10 parts of a rust fixing material, 0.5-1.0 part of a coupling agent, 15-33 parts of glycerol ether, 0.5-2.5 parts of a defoaming agent, 0.5-2 parts of a film forming assistant and 10-34 parts of a curing agent, wherein the rust fixing material is the rust fixing material.
Preferably, the coupling agent is 3-aminopropyltriethoxysilane.
Preferably, the defoaming agent is a BYK052 defoaming agent or polyether siloxane copolymer emulsion.
Preferably, the coalescing agent is propylene glycol.
Preferably, the curing agent is a curing agent with the model number of NX2041 or T-31 or X89 or 703.
The coating has the following technical effects:
the coating comprises the rust fixing material, belongs to a rust conversion coating, and chelates rust on steel with iron oxide through Fe-O-C bonds to generate a macromolecular iron compound, so that a porous rusted surface becomes flat and compact, and a corrosive medium is prevented from diffusing from the surface to a metal matrix, so that a rust layer has no defects. This chelate bond in the macromolecular structure provides better adhesion to the interface. The rust conversion coating has the characteristics of short full-drying time, good adhesive force and impact resistance, greatly shortens the working time and can improve the efficiency. In addition, xylene and the like are not used as solvents, so that the method has the advantages of extremely low VOC content, environmental protection and no pollution. The prepared coating is coated on a rusted steel plate and is placed at room temperature, the actual drying time is about 8 hours, the construction is simple, and the time is saved. The paint can be directly coated on a rusted steel plate without a series of surface treatment processes such as sand blasting, shot blasting and the like, the physical and chemical properties of the rusted steel plate are not influenced, and the adhesive force of the rusted steel plate on a rusted test piece is not reduced. The adopted antifoaming agent and the like are solvent-free coating additives, volatile organic solvents are not used, the VOC is extremely low, and the environment is protected.
The utility model also provides a preparation method of the low-surface treatment coating, which comprises the following steps:
correspondingly placing the epoxy resin, the film-forming assistant, the glycerol ether and the coupling agent in parts by mass in a beaker, heating, controlling the reaction temperature to be 30-40 ℃, and uniformly stirring at a low speed;
adding the rust-fixing material according to the mass parts, and continuously stirring for 10-15 min;
correspondingly adding the defoaming agent and the curing agent according to the mass parts, controlling the rotating speed to be 180-200 r/min, and stirring for 25-30 min;
and keeping the temperature to react for 15-20 min to obtain the low surface treatment coating.
The utility model also provides a coating process, which comprises the following steps:
firstly, spraying the low surface treatment coating;
secondly, after the low surface treatment coating is dried, spraying or brushing a layer of water-based polyurethane coating.
Preferably, the water-based polyurethane coating has a thickness of 100-200 um.
It has the following technical effects:
the coating is carried out twice, the low-surface treatment coating is coated firstly, and then the polyurethane coating is coated on the coating in the state, so that the defect of the micropore micro-seam of the rust-fixing layer can be repaired, the synergistic corrosion resistance of the coating is greatly improved, a complete coating is formed, and the coating has the advantages of high efficiency and good long-term corrosion resistance.
Detailed Description
For a clearer understanding of the contents of the present invention, reference will be made to the detailed description of the present invention.
The utility model provides a preparation method of a rust-fixing material, which takes gallic acid and diol substances as reactants and takes benzenesulfonic acid derivatives or concentrated sulfuric acid as a catalyst for synthesis preparation, wherein the diol substances are diols with the C atom number being more than or equal to 3, and the reaction is as follows:
wherein R represents a carbon chain having 1 or more carbon atoms in the diol-based substance, and A represents the catalyst.
The gallic acid required by the preparation method is extracted from plants, is ecological and environment-friendly, is simple in preparation process, is easy to obtain glycol substances and catalysts which are common substances, is ecological and environment-friendly, does not contain benzene solvents such as dimethylbenzene and the like, has extremely low VOC (volatile organic compound) content and low irritation, and can reduce the influence of volatile organic compounds on constructors and the environment; the method can solve the problem that the concentration of tannic acid and phosphoric acid in the traditional rust conversion coating is difficult to control, takes gallic acid as a main body, utilizes acid catalytic esterification reaction to enable glycol substances to react with carboxyl in the gallic acid to generate stable rust fixing materials, and forms stable gallic acid-metal (or iron) complexes with metal ions (especially iron ions) through strong chelation, thereby fixing metal rusty substances, forming a closed structure, preventing external corrosive substances from flowing into a metal matrix and inhibiting corrosion; the diol having 3 or more carbon atoms is used as the diol, and this makes the rust-fixing material soluble in the resin and easy to mix with the resin to form a paint.
Wherein the diol is propylene glycol, butanediol, pentanediol or hexanediol.
The diol substances are more in optional types and are easy to obtain.
In one embodiment, the diol is pentanediol, and the catalyst is a benzenesulfonic acid derivative, and the reaction is as follows:
the catalyst is selected from benzenesulfonic acid derivatives, the reaction activity is high, side reactions such as oxidation and carbon deposition are avoided, the purity of the obtained product is high, the corrosion to equipment is light, and the pollution is small.
The utility model also provides a rust-fixing material which is prepared by the preparation method and has the chemical formula:
the rust-fixing material has the same technical effects as the preparation method.
The utility model also provides a low-surface treatment coating which comprises the following components in parts by mass: 45-65 parts of epoxy resin, 2-10 parts of a rust fixing material, 0.5-1.0 part of a coupling agent, 15-33 parts of glycerol ether, 0.5-2.5 parts of a defoaming agent, 0.5-2 parts of a film forming assistant and 10-34 parts of a curing agent, wherein the rust fixing material is the rust fixing material as claimed in claim 1-4.
The coating comprises the rust fixing material, belongs to a rust conversion coating, and chelates rust on steel with iron oxide through Fe-O-C bonds to generate a macromolecular iron compound, so that a porous rusted surface becomes flat and compact, and a corrosive medium is prevented from diffusing from the surface to a metal matrix, so that a rust layer has no defects. Such chelate bonds in the macromolecular structure provide better adhesion to the interface. The rust conversion coating has the characteristics of short full-drying time, good adhesive force and impact resistance, greatly shortens the working time and can improve the efficiency. In addition, xylene and the like are not used as solvents, so that the method has the advantages of extremely low VOC content, environmental protection and no pollution. The prepared coating is coated on a rusted steel plate and is placed at room temperature, the actual drying time is about 8 hours, the construction is simple, and the time is saved. The paint can be directly coated on a rusted steel plate without a series of surface treatment processes such as sand blasting, shot blasting and the like, the physical and chemical properties of the rusted steel plate are not influenced, and the adhesive force of the rusted steel plate on a rusted test piece is not reduced. The adopted antifoaming agent and the like are solvent-free coating additives, volatile organic solvents are not used, the VOC is extremely low, and the environment is protected.
In a specific embodiment, the coupling agent is 3-aminopropyltriethoxysilane, the defoaming agent is a BYK052 defoaming agent or polyether siloxane copolymer emulsion, the film-forming aid is propylene glycol, and the curing agent is a curing agent of NX2041 or T-31 or X89 or 703. The optional types are more and all are easy to obtain.
The utility model also provides a preparation method of the low-surface treatment coating, which comprises the following steps:
correspondingly placing the epoxy resin, the film-forming assistant, the glycerol ether and the coupling agent in parts by mass in a beaker, heating, controlling the reaction temperature to be 30-40 ℃, and uniformly stirring at a low speed;
adding the rust-fixing material according to the mass parts, and continuously stirring for 10-15 min;
correspondingly adding the defoaming agent and the curing agent according to the mass parts, controlling the rotating speed to be 180-200 r/min, and stirring for 25-30 min;
and keeping the temperature to react for 15-20 min to obtain the low surface treatment coating.
The utility model also provides a coating process, which comprises the following steps:
firstly, spraying the low surface treatment coating;
secondly, after the low surface treatment coating is dried, spraying or brushing a layer of water-based polyurethane coating.
It has the following technical effects:
the coating is carried out twice, the low-surface treatment coating is coated firstly, and then the polyurethane coating is coated on the coating in the state, so that the defect of the micropore micro-seam of the rust-fixing layer can be repaired, the synergistic corrosion resistance of the coating is greatly improved, a complete coating is formed, and the coating has the advantages of high efficiency and good long-term corrosion resistance.
Further, the thickness of the water-based polyurethane coating can be 100-200 um.
The utility model will be further described with reference to the following specific examples, wherein the examples are the preparation of the coating and the coating process:
example 1:
1. raw material formula
The component A comprises:
b component curing agent:
15-34 parts of NX2041 curing agent
2. The preparation method comprises the following steps and process parameters:
(1) placing epoxy resin E-44, film-forming auxiliary agents propylene glycol, glyceryl ether and 3-aminopropyl triethoxysilane into a beaker, heating, controlling the reaction temperature to be 30-40 degrees, and uniformly stirring at a low speed.
(2) Adding the rust-fixing material, and continuing stirring for 10-15 min.
(3) Adding a defoaming agent BYK052 and an NX2041 curing agent, controlling the rotating speed to be 180-200 r/min, and stirring for 25-30 min.
(4) And keeping the temperature to react for 15-20 min to obtain the rust-fixing material.
3. And coating is carried out according to the following process:
(1) low surface treatment of the substrate to be coated. Removing floating dust and impurities on the surface of the test piece, and removing loose rust by using a steel brush.
(2) Spraying or brushing the coating to form a glassy substance on the surface.
(3) Spraying or brushing water-based polyurethane finish paint, and drying and curing to form a high-efficiency long-acting surface coating.
The above examples are only illustrative of the inventive idea and are not limiting of the embodiments of the utility model. Variations and substitutions in other forms will occur to those skilled in the art upon the reading and understanding of the foregoing description. All embodiments need not be, and cannot be, enumerated here. It is to be understood that all such alternative modifications and variations are intended to be included within the scope of the utility model as defined in the appended claims.
Claims (12)
1. A method for preparing a rust-fixing material, characterized in that gallic acid and a diol substance are used as reactants, a benzenesulfonic acid derivative or concentrated sulfuric acid is used as a catalyst, and the diol substance is a diol with a C atom number of 3 or more, and the reaction is as follows:
wherein R represents a carbon chain having 1 or more carbon atoms in the diol, and A represents the catalyst.
2. A method of producing a rust-fixing material according to claim 1, wherein the glycol-based substance is propylene glycol, butylene glycol, pentylene glycol, or hexylene glycol.
3. A method for preparing a rust-fixing material according to claim 2, wherein the diol-based substance is pentanediol, and the catalyst is a benzenesulfonic acid derivative, and the reaction is as follows:
4. a rust-fixing material prepared by the preparation method of any one of claims 1 to 3, having a chemical formula:
5. the low-surface treatment coating is characterized by comprising the following components in parts by mass: 45-65 parts of epoxy resin, 2-10 parts of a rust fixing material, 0.5-1.0 part of a coupling agent, 15-33 parts of glycerol ether, 0.5-2.5 parts of a defoaming agent, 0.5-2 parts of a film forming assistant and 10-34 parts of a curing agent, wherein the rust fixing material is the rust fixing material as claimed in claim 1-4.
6. The low surface treatment coating according to claim 5, wherein the coupling agent is 3-aminopropyltriethoxysilane.
7. The low surface treatment coating according to claim 5, wherein the defoaming agent is a BYK052 defoaming agent or a polyether siloxane copolymer emulsion.
8. The low surface treatment coating according to claim 5, wherein the film forming aid is propylene glycol.
9. The low surface treatment coating according to claim 5, wherein the curing agent is a type NX2041 or T-31 or X89 or 703 curing agent.
10. The method for preparing the low-surface-treatment coating according to claim 5, comprising the steps of:
correspondingly placing the epoxy resin, the film-forming assistant, the glycerol ether and the coupling agent in parts by mass in a beaker, heating, controlling the reaction temperature to be 30-40 ℃, and uniformly stirring at a low speed;
adding the rust-fixing material according to the mass parts, and continuously stirring for 10-15 min;
correspondingly adding the defoaming agent and the curing agent according to the mass parts, controlling the rotating speed to be 180-200 r/min, and stirring for 25-30 min;
and keeping the temperature to react for 15-20 min to obtain the low surface treatment coating.
11. A coating process, characterized by comprising the steps of:
firstly, spraying the low surface treatment coating of any one of claim 5 to claim 9;
secondly, after the low surface treatment coating is dried, spraying or brushing a layer of water-based polyurethane coating.
12. The coating process according to claim 11, wherein the water-based polyurethane coating has a thickness of 100-200 um.
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