CN116200096A - Corrosion-spreading-resistant water-based zinc-rich anticorrosive paint and preparation method thereof - Google Patents
Corrosion-spreading-resistant water-based zinc-rich anticorrosive paint and preparation method thereof Download PDFInfo
- Publication number
- CN116200096A CN116200096A CN202111444237.5A CN202111444237A CN116200096A CN 116200096 A CN116200096 A CN 116200096A CN 202111444237 A CN202111444237 A CN 202111444237A CN 116200096 A CN116200096 A CN 116200096A
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- China
- Prior art keywords
- agent
- component
- corrosion
- zinc
- powder
- Prior art date
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- Granted
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 239000003973 paint Substances 0.000 title claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000011701 zinc Substances 0.000 title claims abstract description 48
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 48
- 238000003892 spreading Methods 0.000 title claims description 24
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 238000005260 corrosion Methods 0.000 claims abstract description 96
- 230000007797 corrosion Effects 0.000 claims abstract description 85
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 64
- 239000003112 inhibitor Substances 0.000 claims abstract description 55
- 239000000839 emulsion Substances 0.000 claims abstract description 34
- 239000003822 epoxy resin Substances 0.000 claims abstract description 34
- 239000000049 pigment Substances 0.000 claims abstract description 34
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 34
- 239000000080 wetting agent Substances 0.000 claims abstract description 31
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000013530 defoamer Substances 0.000 claims abstract description 26
- 239000002562 thickening agent Substances 0.000 claims abstract description 25
- 239000002270 dispersing agent Substances 0.000 claims abstract description 22
- 239000002904 solvent Substances 0.000 claims abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 20
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 20
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 14
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000009396 hybridization Methods 0.000 claims abstract description 4
- 150000004756 silanes Chemical class 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 59
- 238000000576 coating method Methods 0.000 claims description 57
- 239000011248 coating agent Substances 0.000 claims description 56
- 239000000843 powder Substances 0.000 claims description 31
- 239000002518 antifoaming agent Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 28
- 239000010445 mica Substances 0.000 claims description 21
- 229910052618 mica group Inorganic materials 0.000 claims description 21
- 238000001914 filtration Methods 0.000 claims description 20
- 230000007480 spreading Effects 0.000 claims description 20
- 239000004952 Polyamide Substances 0.000 claims description 14
- 229920002647 polyamide Polymers 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 235000014692 zinc oxide Nutrition 0.000 claims description 13
- 239000011787 zinc oxide Substances 0.000 claims description 13
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 229920000570 polyether Polymers 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 6
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical class O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 5
- -1 polysiloxane Polymers 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004359 castor oil Chemical class 0.000 claims description 4
- 235000019438 castor oil Nutrition 0.000 claims description 4
- 239000013522 chelant Substances 0.000 claims description 4
- 229910021485 fumed silica Inorganic materials 0.000 claims description 4
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Chemical class CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 235000010288 sodium nitrite Nutrition 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 claims description 3
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052627 muscovite Inorganic materials 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 229910052628 phlogopite Inorganic materials 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 2
- 229920002396 Polyurea Polymers 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 125000000129 anionic group Chemical group 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 125000002091 cationic group Chemical group 0.000 claims description 2
- 235000010980 cellulose Nutrition 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 150000002009 diols Chemical class 0.000 claims description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 2
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 150000003376 silicon Chemical class 0.000 claims description 2
- 235000015393 sodium molybdate Nutrition 0.000 claims description 2
- 239000011684 sodium molybdate Substances 0.000 claims description 2
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 2
- NVKTUNLPFJHLCG-UHFFFAOYSA-N strontium chromate Chemical compound [Sr+2].[O-][Cr]([O-])(=O)=O NVKTUNLPFJHLCG-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000002660 anti-spreading effect Effects 0.000 abstract 3
- 239000004593 Epoxy Substances 0.000 description 17
- 238000005303 weighing Methods 0.000 description 16
- 150000003839 salts Chemical class 0.000 description 14
- 239000000047 product Substances 0.000 description 13
- 239000007921 spray Substances 0.000 description 13
- 239000000758 substrate Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000005507 spraying Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000002585 base Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 239000013065 commercial product Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- JMTIXSZQYHAMLY-UHFFFAOYSA-N [P].[Zn] Chemical compound [P].[Zn] JMTIXSZQYHAMLY-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003085 diluting agent Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000004846 water-soluble epoxy resin Substances 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 3
- 229920001400 block copolymer Polymers 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000004005 microsphere Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000003125 aqueous solvent Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 238000007761 roller coating Methods 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical group CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 241001440206 Homodes Species 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000005210 alkyl ammonium group Chemical group 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- AEDZKIACDBYJLQ-UHFFFAOYSA-N ethane-1,2-diol;hydrate Chemical compound O.OCCO AEDZKIACDBYJLQ-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M nitrite group Chemical group N(=O)[O-] IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical group [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229960001124 trientine Drugs 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- 239000002699 waste material 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
Classifications
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/44—Amides
-
- 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
-
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of paint, relates to an anti-corrosion and anti-spreading water-based zinc-rich anti-corrosion paint and a preparation method thereof, and in particular relates to an anti-corrosion and anti-spreading water-based zinc-rich anti-corrosion paint and a preparation method thereof and application thereof in the anti-corrosion field. The water-based zinc-rich anticorrosive paint comprises a component A and a component B, wherein the component A and the component B are mixed according to the mass ratio of 1:2.5-3.75; the component A is epoxy resin emulsion, defoamer, wetting agent, thickener, anti-flash rust agent and deionized water, and the component B is curing agent, corrosion inhibitor, dispersant, defoamer, anti-settling agent, sericite, active pigment, zinc powder and solvent; the corrosion inhibitor is a silane coupling agent, acetylacetone or an organic-inorganic hybridization modified silane coupling agent. The anti-corrosion and anti-spreading water-based zinc-rich anti-corrosion paint not only ensures the stability of zinc powder in the liquid paint, but also ensures the corrosion resistance of the product.
Description
Technical Field
The invention belongs to the technical field of paint, and in particular relates to a water-based paint, in particular to a water-based zinc-rich anti-corrosion paint for resisting corrosion and spreading, a preparation method thereof and application thereof in the corrosion-resistant field.
Background
The solvent-type double-component epoxy zinc-rich paint has good corrosion resistance, is mature in market application, plays an important role in the fields with higher corrosion resistance requirements such as bridge, chemical storage tanks, wind power, containers and ocean corrosion resistance, and has become a necessary trend of development due to the increasingly strict environmental protection requirements;
water-soluble epoxy resins are very different from solvent-type epoxy resins in terms of curing mechanism. The solvent type epoxy resin and the solvent type curing agent are uniformly mixed to obtain a homogeneous system, so that the solvent type epoxy resin can be directly subjected to crosslinking curing reaction among molecules during curing, and the curing reaction gradually tends to be complete along with gradual volatilization of the solvent to form a compact and uniform epoxy resin coating; the water-soluble epoxy resin is a two-phase system, (an organic phase and an aqueous phase), and the epoxy resin is dispersed in water in the form of emulsion particles, so that the solvent-type epoxy curing agent or the water-soluble epoxy curing agent is used, and the curing agent is dispersed in one phase. The curing reaction firstly occurs in the emulsion microspheres and then the surfaces of the emulsion microspheres which are contacted with each other, so that the surface is quickly cured due to easier volatilization of the aqueous solvent on the surface to play an isolating role, and the lower aqueous solvent is volatilized slowly due to the existence of capillary force, so that the epoxy resin molecules and the curing agent molecules among the emulsion microspheres on the lower layer are difficult to cross-link with each other to generate curing reaction, the curing degrees of all parts are different, the curing time is longer than that of the solvent-type epoxy resin, and the curing is possibly incomplete. And causes the paint film to be coated with and absorb more moisture. Therefore, the curing degree of the water-soluble epoxy resin paint film is basically lower than that of a solvent type, the resin crosslinking density is relatively poor, and the overall corrosion resistance of the paint film is relatively low; in general, most of the auxiliary agents of solvent-type epoxy resin and the auxiliary agents of water-based epoxy resin are not universal, and whether the auxiliary agents suitable for solvent-type epoxy resin can play a corresponding role in curing the water-soluble epoxy resin cannot be expected, but the corrosion resistance of a paint film can be improved in other ways to make up for the defect in the aspect, so that the corrosion resistance of the water-based paint film is equivalent to or even better than that of the solvent-type paint film.
Because zinc powder is relatively active and easily reacts with water, the commercial water-based epoxy zinc-rich paint is prepared by three components: the water-based epoxy zinc-rich primer prepared by the method has complex construction, is not suitable for coating production with fast rhythm and assembly line, and has the defects of inconvenient construction, dust pollution, incomplete zinc powder use, easy oxidation and the like.
On the other hand, the aqueous epoxy zinc-rich product system consists of aqueous epoxy emulsion or hydrophilic epoxy resin, hydrophilic polyamide curing agent and zinc powder, 100% liquid epoxy resin is adopted to match the polyamide curing agent with an emulsifying function, and the aqueous epoxy resin is diluted by water after being emulsified by the emulsifying function of polyamide. This is relatively low cost, but has relatively poor performance due to the presence of the emulsifier in the curing agent. And the existence of hydrophilic groups and an emulsifier has great influence on the water resistance and salt spray resistance of the coating film. Even if the commercial water-based epoxy zinc-rich paint can meet the corrosion technical index after salt spray test after thousands of hours of salt spray test, the secondary adhesive force after salt spray test is obviously reduced, namely the corrosion spreading resistance is weak. In the case of external drawing, the coating film is partially peeled off from the substrate. Objectively, this situation affects the service life of the coating to a large extent.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide an aqueous zinc-rich anticorrosive paint for resisting corrosion and spreading and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an aqueous zinc-rich anticorrosive paint for resisting corrosion and spreading comprises a component A and a component B, wherein the paint is prepared by mixing the component A and the component B according to a mass ratio of 1:2.5-3.75; the component A is epoxy resin emulsion, defoamer, wetting agent, thickener, anti-flash rust agent and deionized water, and the component B is curing agent, corrosion inhibitor, dispersant, defoamer, anti-settling agent, sericite, active pigment, zinc powder and solvent; the corrosion inhibitor is a silane coupling agent, acetylacetone or an organic-inorganic hybridization modified silane coupling agent.
The component A comprises the following components in percentage by mass: 88-98% of epoxy resin emulsion, 0-0.4% of defoamer, 0-0.4% of wetting agent, 0-1% of thickener, 0.1-0.4% of flash rust inhibitor and 1-10% of deionized water; the component B comprises the following components in percentage by mass: 2-9% of curing agent, 0.5-2% of dispersing agent, 0.1-1% of defoaming agent, 0.2-1% of anti-settling agent, 1-4% of mica powder, 0-20% of active pigment, 60-90% of zinc powder, 0.1-3% of corrosion inhibitor and 4-20% of solvent.
The component A comprises the following components in percentage by mass: 95-98% of epoxy resin emulsion, 0.1-0.3% of defoamer, 0.1-0.3% of wetting agent, 0.2-0.5% of thickener, 0.1-0.3% of flash rust inhibitor and 1-4% of deionized water; the component B comprises the following components in percentage by mass: 3-6% of curing agent, 1-1.5% of dispersing agent, 0.1-0.4% of defoaming agent, 0.2-0.6% of anti-settling agent, 2-3% of mica powder, 4-10% of active pigment, 70-80% of zinc powder, 1-2% of corrosion inhibitor and 4-12% of solvent.
The epoxy resin emulsion is one or more of E-20 system emulsion, E-20 system self-emulsifying resin, E-51 system emulsion and E-51 system self-emulsifying resin;
the defoaming agent is one or more of natural oil, polyether defoaming agent, high-carbon alcohol defoaming agent, silicon defoaming agent, polyether modified silicon defoaming agent and polysiloxane defoaming agent;
one or more of wetting agent surfactants, low molecular weight siloxane type surfactants, fluorocarbon type surfactants and acetylenic diols;
the thickening agent is one or more of celluloses, hydrophobic modified acrylic esters and polyurethanes;
the flash rust inhibitor is one or more of sodium nitrite, sodium molybdate, strontium chromate, metal organic chelate and multifunctional phosphate chelate;
the curing agent is one or more of amidated polyamine, polyamide and amine adduct;
the dispersing agent is one or more of anionic, cationic, nonionic, electric neutral and high molecular;
the anti-settling agent is one or more of organic bentonite, castor oil derivative, fumed silica, modified hydrogenated castor oil, N-methyl pyrrolidone solution of modified polyurea and polyamide wax;
the mica powder is one or more of muscovite, sericite and phlogopite with the mesh number of 300-1500 meshes;
the active pigment is one or more of superphosphorus zinc white, natural phosphorus iron powder, polymeric phosphorus iron powder and iron titanium powder;
the zinc powder is one or more of spherical zinc powder and flaky zinc powder with the mesh number of 600-1200 and the purity of more than 95 percent;
the solvent is one or more of PM, DPM, PMA, BCS.
A preparation method of an aqueous zinc-rich anticorrosive paint for resisting corrosion and spreading comprises the following steps:
1) And (3) preparing a component A:
(1) Fully mixing and uniformly stirring the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion;
(2) Adding the thickener into the step (1) according to the proportion, continuously stirring and uniformly mixing to obtain slurry, and filtering the slurry to obtain a component A;
2) And (2) preparing a component B:
(1) Fully mixing and uniformly stirring the curing agent, the dispersing agent, the defoaming agent and the solvent according to the proportion;
(2) Adding the anti-settling agent into the step (1) according to the proportion, and continuously stirring and uniformly mixing;
(3) Adding mica powder, active pigment, zinc powder and corrosion inhibitor into the mixed material in the step (2), uniformly mixing, and filtering to obtain a component B;
3) When in use, the component A and the component B are mixed uniformly in proportion.
Mixing the substances in the step (1) in the component A in proportion, adding the mixture into a dispersion kettle, and stirring the mixture at room temperature for 5-15min; adding a thickening agent and continuously stirring for 10-30min;
mixing the substances in the step (1) in the component B in proportion, adding the mixture into a dispersion kettle, and stirring the mixture at room temperature for 5-15min; adding the anti-settling agent, continuing stirring for 10-30min, adding mica powder, active pigment, zinc powder and corrosion inhibitor in step (3), and continuing stirring for 30-60min
The beneficial effects of the invention are as follows:
the aqueous zinc-rich anticorrosive paint for resisting corrosion and spreading adopts a novel process, utilizes a hydrophilic polyamide curing agent as a carrier of zinc powder, and prepares the double-component aqueous epoxy zinc-rich paint with excellent comprehensive performance by pre-dispersing into zinc slurry and cross-linking and curing by matching with epoxy emulsion as a matched component, thereby ensuring the stability of the zinc powder in the liquid paint and simultaneously ensuring the corrosion resistance of the product. The paint can avoid the problems of inconvenient construction, dust pollution, zinc powder waste and the like caused by adding zinc powder on site, has the sum performance equivalent to that of solvent-type epoxy zinc-rich paint, and can completely replace solvent-type products; on the other hand, the traditional aqueous epoxy zinc-rich paint has relatively high pigment ratio, so the adhesive force to a metal substrate is slightly poorer than that of products such as conventional baking paint and the like. However, the water-soluble paint obtained by the invention is added with a proper dose of corrosion inhibitor, and is dispersed and wetted with zinc powder in advance to prepare zinc slurry, so that the zinc powder is subjected to surface coating treatment as much as possible, the paint is anchored between a metal base material and a paint film and between active pigment through the principle of silane bridging in the film forming process, and simple physical mixing originally formed between inorganic filler and organic resin is changed into firmer chemical bonds, so that the cohesive force of the paint is increased. The gain effect finally obtained is that a small amount of corrosion inhibitor is added, and a preferable filler system is matched, so that a synergistic effect can be formed, the adhesive force of the coating and the base material is improved, the protection time of the coating on the base material is greatly prolonged, and the corrosion resistance is obviously improved. Compared with the traditional method for improving the overall adhesive force of a system by adding epoxy phosphate or blending modified curing agent, the method greatly improves the secondary adhesive force of a paint film after a salt spray test, and does not influence the stability of a paint system. Particularly, the salt spray time of more than 1500 hours can be realized, and the corrosion at the scratch is spread within 1.5 mm; in addition, the coating subjected to salt spray test has good secondary adhesion to the base material, is difficult to strip, and has outstanding corrosion spreading resistance. Specific data are shown in the examples below and it can be seen from the data that the properties of the aqueous coating materials obtained according to the invention, in particular the resistance to salt spray and to corrosion spread, have reached or even exceeded the solvent-borne zinc-rich coating materials of the same zinc content. Is very favorable for the water-based, environment-friendly and VOC-reduced coating.
Detailed Description
The following description of the embodiments of the present invention is further provided in connection with the accompanying examples, and it should be noted that the embodiments described herein are for the purpose of illustration and explanation only, and are not limiting of the invention.
In specific use, the epoxy resin emulsion is an epoxy resin emulsion of an E20 system, has a solid content of 52%, an epoxy equivalent of 500, and contains a small amount of cosolvent and deionized water.
In specific use, the defoamer is one or a mixture of more of polyether type, silicone oil type and polyether modified type. For example, polyether type such as glycerin, polyoxyethylene oxypropylene glycerin, etc. produced by addition polymerization of propylene oxide or a mixture of ethylene oxide and propylene oxide. Silicone oils such as polydimethylsiloxane. Polyether modifications such as polyether-siloxane copolymers. The defoamer is adopted to reduce the surface tension and inhibit or eliminate the generated foam, and in the specific use, the polyether modified defoamer is adopted because the polyether modified defoamer has the advantages of stronger water-repellent capability and rapid foam breaking, and has low cost and long foam inhibition time with less consumption.
In particular use, the wetting agent is a polyether modified siloxane based wetting agent, such as a low molecular weight polysiloxane. The wetting agent can quickly reduce the surface tension of a system, has excellent anti-shrinkage capability, can not stabilize bubbles, and has no influence on the recoating of a paint film.
In particular use, the thickener is an associative polyurethane type thickener, such as a modified polyurethane. This type of thickener increases low shear viscosity, has less effect on gloss and is insensitive to PH.
In particular use, the flash rust inhibitor is a nitrite and borate type flash rust inhibitor that is free of VOCs, such as an aqueous solution of sodium nitrite. The anti-flash rust agent has no influence on other materials in the paint, does not influence paint film color and has synergistic effect with anti-corrosion pigment in the paint, and the anti-flash rust agent can provide excellent anti-flash rust performance with low dosage.
In a specific use, the curing agent is a water-soluble modified polyamide curing agent, for example a modified polyamide curing agent having an active hydrogen equivalent of 118 and a solid content of 60% and a solvent of PM or PMA. Because zinc powder is added into the component B, the component B can not contain water, can fully wrap the zinc powder and can not react with the zinc powder.
In particular use, the dispersant is a block copolymer containing pigment affinities, such as a polylactone polyol-polyethyleneimine block copolymer, a reactant of polycaprolactone and triethylene tetramine, an acrylate polymer, and a polyacrylate. The dispersant can reduce the viscosity of the abrasive, stabilize the abrasive, has anti-flooding capability and is more suitable for an anti-corrosion and anti-rust coating system.
In specific use, the solvent is a mixed solvent prepared from PM and DPM, the volatilization rates of PM and DPM are different, the drying time is regulated in the process of drying and curing the coating, namely, the drying time is not too fast nor too slow, the coating with compact stroke of a paint film in the drying process is ensured, and meanwhile, the use of the DPM with proper quantity has a gain effect on the corrosion resistance of the coating.
In specific use, the anti-settling agent is one or more of organobentonite, clay, fumed silica and polyamide wax. The anti-settling agent is adopted because zinc powder has very high specific gravity, is easy to settle in the system, is difficult to stir when in use, and even forms hard lumps at the bottom of a container, so that the coating system breaks emulsion and the coating is invalid. In order to prevent zinc powder from precipitating, the characteristics of good suspension property and dispersibility of bentonite can be utilized to improve the stability of the coating suspension so that the coating suspension is not easy to delaminate. In addition, bentonite can form flocculent substances, has a thickening effect, and molecular groups of the bentonite can be combined with organic base materials in the coating, so that the water resistance of the coating is enhanced, and the strength and the adhesive force of the coating are improved. The fumed silica has silicon oxide groups and silanol groups on the surface, and the groups have good affinity with film forming substances and can interact to form hydrogen bonds, so that the anti-settling particles adsorbed with zinc powder can be stably suspended in a coating system. The polyamide wax has good compatibility, can improve the fluidity of resin, can migrate to the surface of the coating in the volatilization process of solvent and water after the coating is applied, and finally forms a waxed surface on other components of the coating, thereby enhancing the abrasion resistance of the coating, prolonging the salt spray resistance time and the acid and alkali resistance soaking time of the coating.
In specific use, the mica powder is one or more of muscovite, sericite and phlogopite with the mesh number of 100-1500 meshes, and the special platy structure of the mica powder can prolong the path of corrosive medium invading the substrate and prolong the protection time of the coating on the substrate. Sericite belongs to monoclinic crystals, the crystals are in a scale shape, and a crystal aggregate is in a block shape and has silk luster. The coating has good dispersion and suspension properties in aqueous medium and organic solvent, fine white particles, indissolvable acid-base solution and stable chemical property, and effectively improves the permeation resistance, weather resistance, wear resistance and corrosion resistance of the coating. In the coating process, sericite wafers lie down under the action of surface tension before the paint film is cured, and a structure parallel to each other and the surface of the paint film is automatically formed. The alignment of the layers is just perpendicular to the direction of the corrosive substances penetrating through the paint film, so that a labyrinth effect is formed on the corrosive medium, and the barrier effect is fully exerted.
In specific use, the active pigment is one or more of superphosphorus zinc white, phosphorus iron powder and iron titanium powder. The active pigment is introduced with various antirust pigments (salts), and various components are advantaged by good favor and short-term prevention, so that the performance of the pigment is purposefully enhanced and improved. By utilizing the chelating property of phosphate ions and metal, the early-stage 'flash rust' phenomenon of the paint is solved by adding the active ingredients, and the rust resistance of the paint is greatly improved.
In specific use, the zinc powder is spherical zinc powder with 600-1200 meshes, and one or more of flaky zinc powder are mixed. Zinc powder is the key for realizing the anticorrosion function of the anticorrosion paint. Since the standard electrode potential of zinc powder is more negative than steel, when corrosive substances contact the metal substrate, zinc powder is gradually dissolved so that steel is protected; after zinc powder is corroded and dissolved for a period of time, a plurality of corrosion products of zinc such as zinc oxide, basic zinc carbonate, zinc phosphate and the like are deposited between zinc powder and pigment filler particles, and the corrosion products are compact and nonconductive, fill up gaps between pigment filler layers, and can prevent penetration of corrosive media, namely, a protective layer formed by the corrosion products and the coating plays a role in corrosion prevention in the later period of corrosion.
In specific use, the corrosion inhibitor is one or a mixture of more of a silane coupling agent, acetylacetone and an organic-inorganic hybridization modified silane coupling agent. The silane coupling agent is easy to hydrolyze, when the silane coupling agent is added into a water-based paint system, a large amount of silicon hydroxyl groups are generated by rapid hydrolysis, the silicon hydroxyl groups are dehydrated and condensed to generate oligomeric siloxane containing the silicon hydroxyl groups, hydroxyl groups in the oligomeric siloxane interact with hydroxyl groups on the surface of a substrate to form hydrogen bonds, so that one end of the silane coupling agent can be connected with a film forming substance, and the other end of the silane coupling agent is connected with the substrate to form a bridge between a coating and a metal substrate, thereby improving the adhesive force between the coating and the substrate. Therefore, the water resistance and the salt water resistance of the coating film are gradually improved to be stable along with the increase of the silane coupling agent, and meanwhile, the corrosion diffusion width at the scratch part is gradually reduced along with the increase of the silane coupling agent, which also proves the improvement of the corrosion resistance of the coating film, namely the improvement of the corrosion spreading resistance of the coating film.
The invention is illustrated by the following specific examples:
example 1:
weighing the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion, and stirring for 10min; adding thickener, stirring for 20min, and filtering to obtain component A.
And then weighing the curing agent, the dispersing agent, the defoaming agent and the wetting agent according to the proportion, stirring for 10min, adding the anti-settling agent, continuously stirring for 20min, finally adding the mica powder, the active pigment (ferrophosphorus powder) and the zinc powder, continuously stirring for 30min, and filtering to obtain the component B.
When the zinc-rich anticorrosive paint is specifically used, 100g of A component and 300g of B component are mixed at room temperature, and the water-rich zinc-rich anticorrosive paint capable of resisting corrosion and spreading is obtained after uniform mixing.
Example 2:
weighing the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion, and stirring for 10min; adding thickener, stirring for 20min, and filtering to obtain component A.
And then weighing the curing agent, the dispersing agent, the defoaming agent and the wetting agent according to the proportion, stirring for 10min, adding the anti-settling agent, continuously stirring for 20min, finally adding the mica powder, the active pigment (super phosphorus zinc white) and the zinc powder, continuously stirring for 30min, and filtering to obtain the component B.
When the zinc-rich anticorrosive paint is specifically used, 100g of A component and 300g of B component are mixed at room temperature, and the water-rich zinc-rich anticorrosive paint capable of resisting corrosion and spreading is obtained after uniform mixing.
Example 3:
weighing the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion, and stirring for 10min; adding thickener, stirring for 20min, and filtering to obtain component A.
And then weighing the curing agent, the dispersing agent, the defoaming agent and the wetting agent according to the proportion, stirring for 10min, adding the anti-settling agent, continuously stirring for 20min, finally adding the mica powder, the active pigment (super phosphorus zinc white), the zinc powder and the corrosion inhibitor 1, continuously stirring for 30min, and filtering to obtain the component B.
When the zinc-rich anticorrosive paint is specifically used, 100g of A component and 300g of B component are mixed at room temperature, and the water-rich zinc-rich anticorrosive paint capable of resisting corrosion and spreading is obtained after uniform mixing.
Example 4:
weighing the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion, and stirring for 10min; adding thickener, stirring for 20min, and filtering to obtain component A.
And then weighing the curing agent, the dispersing agent, the defoaming agent and the wetting agent according to the proportion, stirring for 10min, adding the anti-settling agent, continuously stirring for 20min, finally adding the mica powder, the active pigment (super phosphorus zinc white), the zinc powder and the corrosion inhibitor 2, continuously stirring for 30min, and filtering to obtain the component B.
When the zinc-rich anticorrosive paint is specifically used, 100g of A component and 300g of B component are mixed at room temperature, and the water-rich zinc-rich anticorrosive paint capable of resisting corrosion and spreading is obtained after uniform mixing.
Example 5:
weighing the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion, and stirring for 10min; adding thickener, stirring for 20min, and filtering to obtain component A.
And then weighing the curing agent, the dispersing agent, the defoaming agent and the wetting agent according to the proportion, stirring for 10min, adding the anti-settling agent, continuously stirring for 20min, finally adding the mica powder, the active pigment (super phosphorus zinc white), the zinc powder and the corrosion inhibitor 3, continuously stirring for 30min, and filtering to obtain the component B.
When the zinc-rich anticorrosive paint is specifically used, 100g of A component and 300g of B component are mixed at room temperature, and the water-rich zinc-rich anticorrosive paint capable of resisting corrosion and spreading is obtained after uniform mixing.
Example 6:
weighing the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion, and stirring for 10min; adding thickener, stirring for 20min, and filtering to obtain component A.
And then weighing the curing agent, the dispersing agent, the defoaming agent and the wetting agent according to the proportion, stirring for 10min, adding the anti-settling agent, continuously stirring for 20min, finally adding the mica powder, the active pigment (ferrophosphorus powder), the zinc powder and the corrosion inhibitor 1, continuously stirring for 30min, and filtering to obtain the component B.
When the zinc-rich anticorrosive paint is specifically used, 100g of A component and 300g of B component are mixed at room temperature, and the water-rich zinc-rich anticorrosive paint capable of resisting corrosion and spreading is obtained after uniform mixing.
Example 7:
weighing the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion, and stirring for 10min; adding thickener, stirring for 20min, and filtering to obtain component A.
And then weighing the curing agent, the dispersing agent, the defoaming agent and the wetting agent according to the proportion, stirring for 10min, adding the anti-settling agent, continuously stirring for 20min, finally adding the mica powder, the active pigment (ferrophosphorus powder), the zinc powder and the corrosion inhibitor 2, continuously stirring for 30min, and filtering to obtain the component B.
When the zinc-rich anticorrosive paint is specifically used, 100g of A component and 300g of B component are mixed at room temperature, and the water-rich zinc-rich anticorrosive paint capable of resisting corrosion and spreading is obtained after uniform mixing.
Example 8:
weighing the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion, and stirring for 10min; adding thickener, stirring for 20min, and filtering to obtain component A.
And then weighing the curing agent, the dispersing agent, the defoaming agent and the wetting agent according to the proportion, stirring for 10min, adding the anti-settling agent, continuously stirring for 20min, finally adding the mica powder, the active pigment (ferrophosphorus powder, superphosphoric zinc white), the zinc powder and the corrosion inhibitor 3, continuously stirring for 30min, and filtering to obtain the component B.
When the zinc-rich anticorrosive paint is specifically used, 100g of A component and 300g of B component are mixed at room temperature, and the water-rich zinc-rich anticorrosive paint capable of resisting corrosion and spreading is obtained after uniform mixing.
Table-examples 1-8 formulation difference table
The resin emulsion is an epoxy resin emulsion of an E20 system, the solid content is 52%, and the epoxy equivalent is 500 (commercial product, from Guangdong Tongde); the defoamer is organosilicon defoamer (commercial product from AFCONA), the wetting agent is polyether modified siloxane (commercial product from AFCONA), the flash rust inhibitor is effectively divided into 5% sodium nitrite aqueous solution, the thickener is associative polyurethane solution with nonvolatile content of 49-53% and specific gravity of 1.04 (the solvent is ethylene glycol monobutyl ether and water).
The above curing agent was a water-soluble, modified polyamide curing agent (commercially available product from guangdong homode) having an active hydrogen equivalent of 118 and a solid content of 60% and a solvent of PM and PMA, the dispersing agent was a block copolymer containing pigment affinity groups (triethanolamine and alkylammonium salt as main components) having a molecular weight of 900, a nonvolatile content of 80±5% and a specific gravity of 1.1±0.05 (commercially available product from Silok), the antifoaming agent was a silicone antifoaming agent (commercially available product from AFCONA), the solvent was PM and DPM (v/v) =1:1), the anti-settling agent was organobentonite (commercially available product from Zhejiang red space) and the polyamide wax (commercially available product from model 451). The mica powder is sericite (commercial product from Anhui Gray) with a mesh number of 300-1500 meshes; the active pigment is super-phosphorus zinc white or phosphorus iron powder (commercial product from Tai and Hui jin) with the mesh number of 800-1200 meshes; zinc powder is spherical zinc powder (commercially available product from Jiangsu Shen Long) with 600-1200 mesh; the corrosion inhibitor is a silane type formulation (model 3040, 3050, CX-2, from Shanghai cell site), wherein corrosion inhibitor 1 is 3040, corrosion inhibitor 2 is 3050, and corrosion inhibitor 3 is CX-2.
The mixed paint is coated on the surface of the steel base material which is subjected to sand blasting or polishing treatment in advance through brushing, roller coating, airless spraying or air spraying, wherein the air spraying can be diluted by a diluent (deionized water is used as the diluent) so that the thickness of the dried paint reaches 90+/-10 mu m, and the paint is used as primer, and then further performance detection is carried out on the paint.
The components A and B obtained in the above examples are uniformly mixed according to the description of the examples, and the mixing meets the proportion requirement of 1:2.5-3.75. And then adopting an airless spraying mode to spray on a standard test carbon steel plate with the diameter of 90-110 mu m, and performing performance test on the standard test carbon steel plate after maintenance, wherein the performance test is performed on impact resistance, neutral salt spray resistance and water resistance, (the test is performed according to the standard HG/T3668-2009 zinc-rich primer). The coating performance results of the examples are shown in Table 2.
Table 2 dry film test performance table for coating
As can be seen from examples 1-8 of Table 2 above, the strippable distance of the coating was +.infinity when no corrosion inhibitor was used, indicating that the corrosion inhibitor effect was evident and was unable to act to resist corrosion propagation without addition, so that the one-way expansion results were very large, 2.8mm and 2.1mm. 2mm beyond the standard specification; when the active filler is used in combination with a corrosion inhibitor, the corrosion spreading resistance of the coating is significantly enhanced. The unidirectional corrosion results of the ferrophosphorus and the three corrosion inhibitors meet the standard requirements (less than or equal to 2 mm), but the strippable coating distance results are not particularly ideal and are all larger than the unidirectional corrosion distances; when the ultra-phosphorus zinc white is matched with three corrosion inhibitors, the one-way corrosion expansion and the stripping distance of the coating are consistent, and the results are very small, wherein the use effect of the ultra-phosphorus zinc white matched with the corrosion inhibitor 3 is optimal, the one-way corrosion expansion shows that the stripping distance of the coating is 0.5mm, and the salt spray resistance time of the coating can reach 1500 mm. Therefore, the paint provided by the invention has excellent corrosion spreading resistance due to the synergistic effect of the active filler super-phosphorus zinc white and the corrosion inhibitor 3, and has a certain influence on the paint performance.
The A, B components of the paint disclosed by the invention are mixed, the mixed paint is coated on the surface of the steel substrate which is subjected to sand blasting or polishing treatment in advance through brushing, roller coating, airless spraying or air spraying, wherein the air spraying can be diluted by a diluent (deionized water is used as the diluent), so that the film thickness after drying reaches 90+/-10 mu m, the film can be used as a primer, and then the upper side can be matched with a water-based epoxy cloud iron intermediate paint and a water-based polyurethane finish paint or a water-based epoxy finish paint for use. The dried water-based zinc-rich anti-corrosion coating for resisting corrosion and spreading can well protect steel base materials. The zinc powder in the coating can release electrons to provide cathodic protection for the steel substrate at the damaged part in the coating, the anti-settling agent can help the zinc powder to be uniformly dispersed and prevent the zinc powder from settling on the surface of the steel substrate, the corrosion inhibitor can form hydrogen bonds, the simple mixing effect originally formed between the inorganic filler and the organic resin is changed into a firmer chemical bond, the cohesive force of the coating is increased, and meanwhile, the adhesive force between the substrate and the whole coating is obviously improved due to the formation of the hydrogen bonds, so that further corrosion spread is prevented.
In summary, it can be shown that the appropriate reactive pigments in combination with the preferred corrosion inhibitors can significantly improve the salt spray resistance and corrosion spread resistance of the coating.
Claims (6)
1. An aqueous zinc-rich anticorrosive paint for resisting corrosion and spreading comprises a component A and a component B, and is characterized in that: the coating is prepared by mixing a component A and a component B according to the mass ratio of 1:2.5-3.75; the component A is epoxy resin emulsion, defoamer, wetting agent, thickener, anti-flash rust agent and deionized water, and the component B is curing agent, corrosion inhibitor, dispersant, defoamer, anti-settling agent, sericite, active pigment, zinc powder and solvent; the corrosion inhibitor is a silane coupling agent, acetylacetone or an organic-inorganic hybridization modified silane coupling agent.
2. The corrosion-propagation-resistant aqueous zinc-rich anticorrosive coating according to claim 1, wherein: the component A comprises the following components in percentage by mass: 88-98% of epoxy resin emulsion, 0-0.4% of defoamer, 0-0.4% of wetting agent, 0-1% of thickener, 0.1-0.4% of flash rust inhibitor and 1-10% of deionized water; the component B comprises the following components in percentage by mass: 2-9% of curing agent, 0.5-2% of dispersing agent, 0.1-1% of defoaming agent, 0.2-1% of anti-settling agent, 1-4% of mica powder, 0-20% of active pigment, 60-90% of zinc powder, 0.1-3% of corrosion inhibitor and 4-20% of solvent.
3. The corrosion-propagation-resistant aqueous zinc-rich anticorrosive coating according to claim 2, wherein: the component A comprises the following components in percentage by mass: 95-98% of epoxy resin emulsion, 0.1-0.3% of defoamer, 0.1-0.3% of wetting agent, 0.2-0.5% of thickener, 0.1-0.3% of flash rust inhibitor and 1-4% of deionized water; the component B comprises the following components in percentage by mass: 3-6% of curing agent, 1-1.5% of dispersing agent, 0.1-0.4% of defoaming agent, 0.2-0.6% of anti-settling agent, 2-3% of mica powder, 4-10% of active pigment, 70-80% of zinc powder, 1-2% of corrosion inhibitor and 4-12% of solvent.
4. A corrosion-resistant aqueous zinc-rich anticorrosive coating according to any one of claims 1 to 3, characterized in that: the epoxy resin emulsion is one or more of E-20 system emulsion, E-20 system self-emulsifying resin, E-51 system emulsion and E-51 system self-emulsifying resin;
the defoaming agent is one or more of natural oil, polyether defoaming agent, high-carbon alcohol defoaming agent, silicon defoaming agent, polyether modified silicon defoaming agent and polysiloxane defoaming agent;
one or more of wetting agent surfactants, low molecular weight siloxane type surfactants, fluorocarbon type surfactants and acetylenic diols;
the thickening agent is one or more of celluloses, hydrophobic modified acrylic esters and polyurethanes;
the flash rust inhibitor is one or more of sodium nitrite, sodium molybdate, strontium chromate, metal organic chelate and multifunctional phosphate chelate;
the curing agent is one or more of amidated polyamine, polyamide and amine adduct;
the dispersing agent is one or more of anionic, cationic, nonionic, electric neutral and high molecular;
the anti-settling agent is one or more of organic bentonite, castor oil derivative, fumed silica, modified hydrogenated castor oil, N-methyl pyrrolidone solution of modified polyurea and polyamide wax;
the mica powder is one or more of muscovite, sericite and phlogopite with the mesh number of 300-1500 meshes;
the active pigment is one or more of superphosphorus zinc white, natural phosphorus iron powder, polymeric phosphorus iron powder and iron titanium powder;
the zinc powder is one or more of spherical zinc powder and flaky zinc powder with the mesh number of 600-1200 and the purity of more than 95 percent;
the solvent is one or more of PM, DPM, PMA, BCS.
5. A method for preparing the corrosion-spreading-resistant aqueous zinc-rich anticorrosive paint according to any one of claims 1 to 4, which is characterized in that:
1) And (3) preparing a component A:
(1) Fully mixing and uniformly stirring the epoxy resin emulsion, the defoamer, the wetting agent, the flash rust inhibitor and the deionized water according to the proportion;
(2) Adding the thickener into the step (1) according to the proportion, continuously stirring and uniformly mixing to obtain slurry, and filtering the slurry to obtain a component A;
2) And (2) preparing a component B:
(1) Fully mixing and uniformly stirring the curing agent, the dispersing agent, the defoaming agent and the solvent according to the proportion;
(2) Adding the anti-settling agent into the step (1) according to the proportion, and continuously stirring and uniformly mixing;
(3) Adding mica powder, active pigment, zinc powder and corrosion inhibitor into the mixed material in the step (2), uniformly mixing, and filtering to obtain a component B;
3) When in use, the component A and the component B are mixed uniformly in proportion.
6. The method for preparing the corrosion-spreading-resistant aqueous zinc-rich anticorrosive paint according to claim 5, which is characterized in that: mixing the substances in the step (1) in the component A in proportion, adding the mixture into a dispersion kettle, and stirring the mixture at room temperature for 5-15min; adding a thickening agent and continuously stirring for 10-30min;
mixing the substances in the step (1) in the component B in proportion, adding the mixture into a dispersion kettle, and stirring the mixture at room temperature for 5-15min; adding the anti-settling agent, continuing stirring for 10-30min, and adding the mica powder, the active pigment, the zinc powder and the corrosion inhibitor in the step (3) and continuing stirring for 30-60min.
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| CN107118664A (en) * | 2017-06-14 | 2017-09-01 | 无锡华东锌盾科技有限公司 | Bi-component aqueous epoxy zinc rich primer and preparation method thereof |
| CN108034294A (en) * | 2017-11-14 | 2018-05-15 | 广州擎天材料科技有限公司 | A kind of zinc slurry and its cladding process for being used to improve the secondary adhesive force of water-thinned epoxy zinc-rich coating |
| CN109181488A (en) * | 2018-09-27 | 2019-01-11 | 天津美士邦涂料化工有限公司 | Preparation method of water-based epoxy zinc-rich primer |
| CN111234654A (en) * | 2020-03-24 | 2020-06-05 | 沈阳派尔化学有限公司 | Novel water-based epoxy zinc-rich primer and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107118664A (en) * | 2017-06-14 | 2017-09-01 | 无锡华东锌盾科技有限公司 | Bi-component aqueous epoxy zinc rich primer and preparation method thereof |
| CN108034294A (en) * | 2017-11-14 | 2018-05-15 | 广州擎天材料科技有限公司 | A kind of zinc slurry and its cladding process for being used to improve the secondary adhesive force of water-thinned epoxy zinc-rich coating |
| CN109181488A (en) * | 2018-09-27 | 2019-01-11 | 天津美士邦涂料化工有限公司 | Preparation method of water-based epoxy zinc-rich primer |
| CN111234654A (en) * | 2020-03-24 | 2020-06-05 | 沈阳派尔化学有限公司 | Novel water-based epoxy zinc-rich primer and preparation method thereof |
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