KR101866433B1 - Painting Methods of Steel Structures Using Environmentally-Friendly Coating material - Google Patents
Painting Methods of Steel Structures Using Environmentally-Friendly Coating material Download PDFInfo
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- KR101866433B1 KR101866433B1 KR1020170162306A KR20170162306A KR101866433B1 KR 101866433 B1 KR101866433 B1 KR 101866433B1 KR 1020170162306 A KR1020170162306 A KR 1020170162306A KR 20170162306 A KR20170162306 A KR 20170162306A KR 101866433 B1 KR101866433 B1 KR 101866433B1
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 239000011248 coating agent Substances 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 title claims description 34
- 238000000034 method Methods 0.000 title abstract description 16
- 238000010422 painting Methods 0.000 title abstract description 4
- 239000010410 layer Substances 0.000 claims abstract description 94
- 239000011247 coating layer Substances 0.000 claims abstract description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 51
- 239000000203 mixture Substances 0.000 claims description 28
- 239000003795 chemical substances by application Substances 0.000 claims description 27
- 239000002987 primer (paints) Substances 0.000 claims description 24
- 239000003085 diluting agent Substances 0.000 claims description 22
- 238000005260 corrosion Methods 0.000 claims description 21
- 230000007797 corrosion Effects 0.000 claims description 21
- 239000000377 silicon dioxide Substances 0.000 claims description 19
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 18
- 239000004593 Epoxy Substances 0.000 claims description 17
- 239000003245 coal Substances 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 16
- 239000008262 pumice Substances 0.000 claims description 16
- 239000011777 magnesium Substances 0.000 claims description 14
- 229910052749 magnesium Inorganic materials 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- -1 acrylic polyol Chemical class 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 12
- 239000008199 coating composition Substances 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000012948 isocyanate Substances 0.000 claims description 9
- 239000012779 reinforcing material Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 239000004611 light stabiliser Substances 0.000 claims description 6
- 229920005862 polyol Polymers 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 230000003449 preventive effect Effects 0.000 claims 1
- 239000003973 paint Substances 0.000 abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000004078 waterproofing Methods 0.000 abstract 1
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 18
- 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 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 13
- 239000003822 epoxy resin Substances 0.000 description 13
- 229920000647 polyepoxide Polymers 0.000 description 13
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 12
- 238000002156 mixing Methods 0.000 description 12
- 239000000919 ceramic Substances 0.000 description 11
- 239000000945 filler Substances 0.000 description 11
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 125000000524 functional group Chemical group 0.000 description 9
- 239000011701 zinc Substances 0.000 description 9
- 229910052725 zinc Inorganic materials 0.000 description 9
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 7
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 5
- 125000001931 aliphatic group Chemical group 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 4
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010073 coating (rubber) Methods 0.000 description 3
- 229940093499 ethyl acetate Drugs 0.000 description 3
- 235000019439 ethyl acetate Nutrition 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- 229920003986 novolac Polymers 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 description 2
- YSUQLAYJZDEMOT-UHFFFAOYSA-N 2-(butoxymethyl)oxirane Chemical compound CCCCOCC1CO1 YSUQLAYJZDEMOT-UHFFFAOYSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- FQYUMYWMJTYZTK-UHFFFAOYSA-N Phenyl glycidyl ether Chemical compound C1OC1COC1=CC=CC=C1 FQYUMYWMJTYZTK-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000004579 marble Substances 0.000 description 2
- 239000004843 novolac epoxy resin Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 229920000768 polyamine Polymers 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 244000132059 Carica parviflora Species 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 235000011201 Ginkgo Nutrition 0.000 description 1
- 235000008100 Ginkgo biloba Nutrition 0.000 description 1
- 244000194101 Ginkgo biloba Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- CWDGUDXMEXCVBN-UHFFFAOYSA-L aluminum;calcium;carbonate Chemical compound [Al+3].[Ca+2].[O-]C([O-])=O CWDGUDXMEXCVBN-UHFFFAOYSA-L 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 1
- GKGXKPRVOZNVPQ-UHFFFAOYSA-N diisocyanatomethylcyclohexane Chemical compound O=C=NC(N=C=O)C1CCCCC1 GKGXKPRVOZNVPQ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- QNDQILQPPKQROV-UHFFFAOYSA-N dizinc Chemical compound [Zn]=[Zn] QNDQILQPPKQROV-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000003278 egg shell Anatomy 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 230000009477 glass transition Effects 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
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- B05D7/14—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 to metal, e.g. car bodies
-
- 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
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/586—No clear coat specified each layer being cured, at least partially, separately
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- 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
- B05D2502/00—Acrylic polymers
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
More particularly, the present invention relates to a method of coating steel structures of bridges using environmentally friendly paints, and more particularly, to a method of coating steel structures (steel boxes, etc.) of bridges by multi-layer coating of primer layer, intermediate layer and undercoat layer, Durability and the like of the steel structure such as a steel box through an environmentally friendly coating layer.
Steel products such as steel boxes (structures such as girders of bridges) are not only degraded in the penetration of salt and water, but also become less durable due to corrosion, resulting in reduced service life. Particularly, bridges built on the beach are infiltrated with salt, resulting in serious durability deterioration.
In order to prevent the durability of the steel structure from deteriorating, it is common to coat the surface of the steel structure.
Inorganic zinc powder coatings, chlorinated rubber coatings, and epoxy coatings, which are widely used at present, are as follows.
1. Mineral zinc powder paint.
The following are known as anti-corrosive paints using zinc powder as the main rust inhibitor. Called zinc rich paint, which is made by putting a high concentration of zinc powder or zinc fine powder into a small amount of resin.
2. Chlorinated rubber-based paint.
Chlorinated rubber coatings, which are generally used in heavy-duty coatings, have a high drying speed, good interlayer adhesion, and are resistant to contamination and coastal environments. In particular, chlorinated rubber coatings are superior to other paints and oxygen permeable coatings due to their superior coating properties, which is advantageous for coating steel structures such as containers and ships.
3. Epoxy-based paint.
Epoxy-based anticorrosive coatings have widely used various polyamine compounds, especially aliphatic polyamine compounds, as curing agents for epoxy resins for room temperature curing.
Patent Document 1 (Patent No. 10-1269132) is a ceramic two-component type anticorrosive coating composition comprising a main component and a curing agent, which is patented by the applicant of the present invention. The main theme of the present invention is a ceramic composition comprising a) 2 to 6 functional groups, 30 to 60 parts by weight of a polymer alloy in which a phenol novolak type epoxy resin having a number average molecular weight of 600 to 600 and a bisphenol F type epoxy resin having 1 to 2 functional groups and an equivalent weight of 150 to 300 is mixed; b) 5 to 20 parts by weight of a multifunctional reactive diluent selected from butyl glycidyl ether, phenyl glycidyl ether, aliphatic glycidyl ether; c) 30 to 60 parts by weight of a ceramic filler selected from the group consisting of hydrofobic silica, aluminum oxide, magnesium oxide and zinc oxide, wherein the curing agent comprises: a) 10 to 25 parts by weight of an amine resin having an equivalent weight of 50 to 400; b) 5 to 15 parts by weight of an amide resin having an equivalent weight of 100 to 400; c) 3 to 10 parts by weight of a bisphenol F type epoxy resin having two functional groups and an equivalent weight of 150 to 300.
Patent Document 10-1583731 discloses a resin composition comprising 30 to 50 wt% of a vinyl acetate copolymer, 10 to 20 wt% of zinc, 20 to 40 wt% of a diluent, 10 to 15 wt% of an additive By weight of a mixture of 20 to 40% by weight of an aliphatic, alicyclic or aromatic isocyanate and 60 to 80% by weight of a diluent, based on 100% 10 to 30% by weight of a phenol novolak epoxy resin, 10 to 30% by weight of a bisphenol A type epoxy resin, 5 to 10% by weight of a polyfunctional reactive diluent, 40 to 60% by weight of an amine resin and 20 to 40% by weight of an amide resin, based on 100 parts by weight of a mixture of 30 to 60% by weight of a filler and 5 to 10% by weight of an additive of at least one of an antireflective agent, By weight and 10 to 20% by weight of a bisphenol A type epoxy And 20 to 50 parts by weight of a vulcanized curing agent is applied to the intermediate layer to form an intermediate layer and a mixture of 50 to 70% by weight of an acrylic polyol, 15 to 35% by weight of a diluent and 10 to 20% A coating composition comprising 20 to 50 parts by weight of a curing agent which is an alicyclic isocyanate having two or more functional groups and an isocyanate group content of 10 to 50% and a solid content of 30 to 70% by weight, based on 100 parts by weight of the composition The upper layer is to be constructed.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to improve the adhesion strength, water resistance and durability by coating the surface of a steel structure such as a steel box (bridges, pedestrian bridges, etc.) with a primer layer, The object of the present invention is to provide a method of coating steel structures of bridges using environmentally friendly coatings that eco-friendly steel structures such as steel boxes through environmentally friendly coating layers.
The steel structure coating method of a bridge using an environmentally friendly paint according to the present invention comprises a first step of arranging a surface of a steel structure of a bridge; A second step of applying a primer coating to the surface of the steel structure after the first step and then forming a primer layer through curing; A third step of coating the intermediate coating material on the surface of the undercoat layer formed through the second step and then forming the intermediate layer through curing; A fourth step of applying a topcoat on the surface of the intermediate layer formed through the third step and curing the topcoat layer to form a topcoat layer; And a fifth step of forming an environmentally friendly coating layer on the surface of the upper layer formed through the fourth step, wherein the fourth step comprises 50 to 70% by weight of the acrylic polyol, 15 to 35% by weight of the diluent and 10 to 20% % Of a curing agent which is an alicyclic isocyanate having an isocyanate group content of 10 to 50% and a solid content of 30 to 70% by weight, based on 100 parts by weight of the mixture A fifth step of forming a base layer by coating a base layer coating composition composed of a material of particles or powder and epoxy on the top layer, 5 to 20 parts by weight of a fiber reinforcing material, 8 to 15 parts by weight of aluminum powder, 15 to 30 parts by weight of calcium carbonate, 4 to 8 parts by weight of a light stabilizer, , 3 to 7 parts by weight of a dispersing agent Coating a coating composition to form a coating layer, wherein the fibrous reinforcement is coated with magnesium to prevent corrosion of the steel structure.
According to the coating method of a steel structure of a bridge using an environmentally friendly paint according to the present invention, a primer layer excellent in adhesion performance to the surface of steel structures such as a steel box, a steel pipe bridge and a steel bridge overpass of a bridge and a middle layer and a sublayer It has multi-layer coating to improve the adhesion strength, waterproofness and durability, and also protects the environment by protecting the steel structure such as steel box by environmentally friendly and preventing corrosion through the environment-friendly coating layer.
The primer coating is applied to improve the durability of the steel structure by increasing the adhesion to the steel structure, to delay the forced corrosion of the substrate by using the sacrificial anode action of zinc (Zinc) Water resistance, water resistance, light resistance, ozone resistance, weather resistance, and durability, the initial coating state can be maintained even if the time is hardened, thereby extending the life of the steel structure.
In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.
The steel structure construction method of a bridge using an environmentally friendly paint according to the present invention is a method of forming a surface layer of a steel structure (steel box is described as an example), forming a primer layer by a coating composition for undercoating, Forming a top coat layer with a top coat paint composition - forming an environmentally friendly coat layer by using an environmentally friendly coating composition.
The environmentally friendly coating layer is divided into a base layer and a coating layer.
The base layer aims to prevent peeling of the upper layer and the coating layer and increase physical rigidity, and the coating layer aims at stabilizing the coating layer.
The base layer is formed through spraying or coating of a base or a base of a particle or a powder and an epoxy for adhesion of the base, and enhances physical rigidity of the coating layer and peels the coating layer.
The above subject is a mixture of coal pumice and silica sand, and coal pumice and silica sand are homogeneous through the main component of SiO2 and are mixed without causing separation between materials.
The coal pumice and silica sand are the first method used independently, and the second method using the coal pumice coating coated with silica sand pumice.
The first method is a method in which coal pumice and silica sand are mixed at a free mixing ratio such as 1: 1, and 30 to 45 parts by weight of a mixture of coal pumice and silica sand is mixed with 100 parts by weight of epoxy to coat the top layer.
The second method is a method in which 30 to 45 parts by weight of a coating ball coated with silica on the surface of coal pumice with 100 parts by weight of epoxy is coated on the top layer.
The coal pumice is not particularly processed for the present invention but can be used in a natural state generated at various particle sizes in the mining process or after being processed through crushing or grain selection.
For the coal pumice coating, silica sand is preferably a grain size smaller than coal pumice, so that it is coated on the surface of the coal pumice.
The coal pumice and silica sand are not specifically limited in size because they are readily available to those skilled in the art.
Silica sand can be replaced with ceramic.
For example, when the coal pumice and silica sand have a particle size of 1 mm in the fine powder, the base layer is formed to have a thickness of 1 mm or more in terms of the thickness of the fine powder.
The base layer can be roughly roughened through pores of coal and silica sand. Through such rough surface, the contact area with the coating layer is increased to improve the adhesion of the coating layer and prevent the coating layer (or coating layer coating) from flowing down.
The coating layer is made by spraying or applying a coating layer coating on the surface of the base layer.
The coat layer coating composition comprises 5 to 20 parts by weight of a fiber reinforcing material coated with magnesium to prevent corrosion, 8 to 15 parts by weight of aluminum powder, 15 to 30 parts by weight of calcium carbonate, 4 to 8 parts by weight of a light stabilizer, And 3 to 7 parts by weight of a dispersant.
Silicon is used as a base material for coating layer compositions through the properties of oxidation resistance, water repellency, and water resistance, and is used for adhesion of materials and adhesion to a base layer. Of course, it is also possible to use an epoxy for solid adhesion, in which case the epoxy is used in an amount of 10 to 25 parts by weight per 100 parts by weight of silicone.
The fiber reinforcing material is used for increasing the tensile strength of the coating layer, and is preferably used as the waste geosynthetic fiber. Particularly, it is used together with magnesium having the characteristic of preventing corrosion, so that the handling is very easy and the corrosion by the magnesium is stably induced, It is a great help to prevent.
Magnesium can be replaced by zinc, and when the top layer is destroyed, the zinc in the environmentally friendly coating layer can be prevented from corrosion together with the zinc in the middle layer, thereby maximizing the corrosion prevention effect.
The fibrous reinforcement is processed to a size of 10 mm or less, and magnesium (for example, powder) is coated on the surface through epoxy or the like to be processed into a form having a corrosion inhibiting layer.
Accordingly, the corrosion inhibiting layer is formed using the fibrous reinforcement as a support, and a large amount of magnesium is formed with a large area of the corrosion preventing layer, thereby greatly preventing corrosion of the steel box.
Magnesium is available in fine powder or powders of various particle sizes.
If the fiber reinforcement is used in an amount of less than 5 parts by weight based on 100 parts by weight of silicon, the strength reinforcement is weak. If the fiber reinforcement is more than 20 parts by weight, the effect of the overall coating is weak due to imbalance with other materials.
The coating of magnesium is carried out by immersing a fiber reinforcing material in a mixture of magnesium powder and epoxy (mixing 35 to 55 parts by weight of magnesium powder with respect to 100 parts by weight of epoxy, and magnesium powder as fine powder), wherein the particle size and amount of magnesium It may be coated on the surface of the fiber reinforcing material at a thickness of 0.01 mm to 0.1 mm, for example. Magnesium is coated not only on the surface of the fiber reinforcement but also between the textures of the fiber reinforcement to form a wide corrosion inhibiting layer on the fiber reinforcement.
The aluminum of the powder is used for reinforcing the strength of the coating layer, and if it is out of the range of 8-15 parts by weight, the strength reinforcing effect is insufficient or there is not much difference in strength reinforcement.
Calcium carbonate is a carbonate of calcium as a filler and can be obtained from marble, calcite, marble, limestone, chalk, ginkgo stone, shell, egg shell and coral. Less than 15 parts by weight of other materials There is a disadvantage in that the use amount is increased and the construction cost is increased. When the amount exceeds 30 parts by weight, the coating effect becomes inferior due to the imbalance of the material.
The light stabilizer is an off-the-shelf product to prevent deterioration by ultraviolet rays, and 4 to 8 parts by weight is an optimal mixing ratio for preventing deterioration.
The dispersing agent induces uniform mixing through prevention of aggregation and dispersion of the materials. Less than 3 parts by weight of the dispersing agent is weakly dispersed, and more than 7 parts by weight is not different from the dispersing effect.
Since the light stabilizer and the dispersing agent are used as ready-made articles, the specific ingredients and product names are not described.
The coating layer formed by applying the coating composition having the above composition may have a thickness of 1 mm to 10 mm.
<Examples>
1. Coating layer composition Composition (ratio).
end. Base layer: 100 parts by weight of epoxy, 25 parts by weight of coal pumice, 15 parts by weight of silica sand
I. Coating layer
The fiber reinforcing material is immersed in a magnesium mixture (45 parts by weight of magnesium powder with respect to 100 parts by weight of epoxy) as a geosynthetic fiber having a length of 2 mm to 5 mm, and coated with magnesium.
2. Construction.
(Primer layer) - intermediate layer - upper layer is formed on the surface of a steel sheet, which is a material for manufacturing a steel box, and a base layer coating composition is applied to the surface of the upper layer to form a base layer, Coating layer composition was applied to form a coating layer. The thickness of the base layer is 1 mm to 1 mm, and the thickness of the coating layer is about 3 mm.
3. Testing.
The samples of this example were left in the seawater for 10 days and the corrosion was confirmed in the coating layer. However, it was confirmed that the corrosion of the steel sheets did not occur, and the deformation was observed in the upper layer, the middle layer and the under layer, I could not confirm it.
Hereinafter, the upper layer coating material, the middle layer coating material and the undercoat layer coating material used in combination with the present invention will be described. The following coating material is obtained by the applicant of the present invention (Patent No. 10-1583731) The invention is used in conjunction with the applicant's patent to effectively protect the steel box.
The top coat consists of a blend of a base and a curing agent.
The subject consists of a blend of 50-70 wt.% Acrylic polyol, 15-35 wt.% Diluent and 10-20 wt.% Additive.
Acrylic polyol is a product having a glass transition temperature (Tg) of -30 to 20 ° C., a solid content of 30 to 80% and an equivalent weight of 500 to 3,000. Diluents include xylene, toluene, At least one of methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), ethyl acetate (EA), N-butylacetate (BA) and cellosolve acetate (CA) , A leveling agent, an anti-settling agent, a pigment, a quencher, and a dispersing agent. The functional material used as the additive is the same as or similar to the additive material described in the undercoat paint, and all of the products used in the paint field can be used.
The curing agent is an alicyclic isocyanate having two or more functional groups and an isocyanate group content of 10 to 50% and diluted with a diluent to adjust the solid content to 30 to 70%. Examples thereof include isophorone diisocyanate (IPDI) Cyclohexylmethane diisocyanate (H12MDI) is used as a diluent (xylene, toluene, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), methyl isobutyl ketone Diluted with 50 to 150 parts by weight of the diluting agent per 100 parts by weight of the curing agent. The diluent is at least one of EA (Ethyl Acetate), BA (N-Butyl Acetate) and CA (Cellosolve Acetate).
The top coat paint is prepared by mixing 20 to 50 parts by weight of a curing agent with respect to 100 parts by weight of the subject, which is an optimum ratio for excellent heat resistance and durability.
The intermediate coating consists of a mixture of a base and a hardener.
The present invention relates to an epoxy resin composition comprising 10 to 30% by weight of a phenol novolak epoxy resin, 10 to 30% by weight of a bisphenol A type epoxy resin having 1 to 2 functional groups and an equivalent weight of 150 to 300, 5 to 10% by weight of the ash, 30 to 60% by weight of the ceramic filler, and 5 to 10% by weight of the additive.
The phenol novolac epoxy resin is a phenol novolac epoxy resin having 2 to 6 functional groups and an equivalent weight of 200 to 600, and is excellent in heat resistance, chemical resistance and adhesion.
As the bisphenol A type epoxy resin, it is preferable to use bisphenol A type epoxy resin having 1 to 2 functional groups and 150 to 300 equivalents, and it is an epoxy resin prepared by polymerizing epichlorohydrin and bisphenol A, Of the hydroxyl groups and the hydrophobic hydrocarbon groups are regularly arranged.
The polyfunctional reactive diluent may be at least one of butyl glycidyl ether, phenyl glycidyl ether and aliphatic glycidyl ether, and when two or more thereof are used in combination, It is freely adjustable within the mixing range.
The multifunctional reactive diluent has the function of improving the impact resistance of the anticorrosive coating, controlling the strength thereof, and controlling the viscosity at the time of work. When the content of less than 5% by weight is mixed, the strength after curing becomes too strong. .
The ceramic filler is used as an inorganic material for improving chemical resistance, abrasion resistance, and the like. The ceramic filler may be at least one selected from the group consisting of hydrophobic silica, aluminum oxide, magnesium oxide, zinc oxide, It is possible to substitute other materials having equivalent functions, and when two or more are used, they are mixed in a free mixing ratio.
The ceramic filler preferably has a particle diameter of 10 to 40 mu m. If the particle diameter of the ceramic filler is less than 10 mu m, the flowability during coating is lowered and the workability is lowered. On the contrary, when the filler particle diameter is 40 mu m or more, problems may occur in appearance, flexibility and moisture absorption rate. If the content of the ceramic filler is less than 30% by weight, the coating of the present invention becomes too soft even after being cured to weaken the adhesion performance during crosscutting. On the other hand, if the content of the ceramic filler is more than 60% by weight, There is a problem that adhesion performance is decreased.
The additive is at least one selected from pigments, leveling agents, antifoaming agents, dispersants, and curing accelerators, and it is possible to use materials used in primer coatings such as silica, calcium carbonate, talc,
As the pigment, organic or inorganic pigments such as titanium dioxide (TiO2), carbon black (Carbon Black), phthalocyanine blue, diazo yellow and the like can be used.
As the leveling agent, a silicone type or a wax type may be used, but not limited thereto, and those commonly used in the art can be used.
The antifoaming agent may be anionic, cationic or nonionic. However, the antifoaming agent is not limited thereto, and a kind commonly used in the art may be used.
The dispersing agent may be anionic, cationic or nonionic, but is not limited thereto, and a species conventionally used in the art may be used.
Finally, the curing accelerator may be a tertiary amine system such as BDMA (benzol dimethyl amine), DMP30 {[0031] Tris (dimethyl aminomethyl) phenol}, but is not limited thereto and those commonly used in the art may be used have.
The curing agent may be at least one of an amine resin having an equivalent weight of 50 to 300, an amide resin having an equivalent weight of 100 to 400, and a bisphenol A type epoxy resin having 1 to 2 functional groups and an equivalent weight of 150 to 300.
The intermediate coating material is obtained by mixing 20 to 50 parts by weight of a curing agent with respect to 100 parts by weight of the subject, which is an optimum ratio for excellent heat resistance and durability.
The primer coating (primer coating) consists of a mixture of a base and a curing agent.
The subject is a mixture of 30-50 wt% vinyl chloride-vinyl alcohol-vinyl acetate copolymer, 10-20 wt% zinc, 20-40 wt% diluent, and 10-15 wt% additive .
The vinyl acetate copolymer has a strong adhesive property so that it is not peeled from the surface of the steel and is adhered with a strong adhesive force. Less than 30% by weight of the vinyl acetate copolymer has a weak adhesive force, and if it exceeds 50% by weight,
Zinc (10 ~ 20㎛) delays corrosion of steel structure by sacrificial anodic action. If it is out of the range of 10 ~ 20 weight%, corrosion retardation effect is weak and weakening of adhesion is given.
The diluent may be selected from the group consisting of xylene, toluene, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), ethylacetate (EA), n-butylacetate (BA) CA (Cellosolve Acetate) Is mixed in the range of 20 to 40% by weight to control the physical properties of the materials, and when two or more are mixed, they are freely adjusted in the above-mentioned range.
The additive is at least one of a quencher having a particle size of 0.5 to 30 μm, a precipitation preventing agent used for preventing precipitation, a pigment, and a defoaming agent used for removing bubbles. The additive can be freely selected according to the characteristics (use) Silica, calcium carbonate, talc, and scorching can be selected, and the powdery material can use the above-mentioned particle size.
The curing agent is a mixture of 20 to 40% by weight of an aliphatic, alicyclic or aromatic isocyanate and 60 to 80% by weight of a diluent.
Isocyanate is excellent in stability and strength enhancement and hardenability due to crosslinking of materials.
The diluent may be the same material used in the subject.
The mixing ratio of the isocyanate and the diluent is for the function of the curing agent, and if the ratio is out of the range, the function of the curing agent is weak or there is not a large difference in effect.
The primer coating is formed by mixing 40 to 60 parts by weight of a curing agent with respect to 100 parts by weight of the above-mentioned composition, which is an optimum ratio for excellent adhesion and corrosion prevention.
The primer coating composition may be prepared by, for example, mixing a vinyl acetate copolymer, zinc, a diluent, and an additive in a stirrer, stirring the mixture at 60 to 70 ° C for 60 to 180 minutes to prepare a subject, and then mixing the isocyanate and the diluent at 60 to 60 ° C The mixture was stirred for 120 minutes and then cooled to a temperature of 75 to 85 ° C to prepare a curing agent. The thus prepared curing agent and the curing agent were stirred at room temperature to prepare a primer coating. The method for producing the primer coating according to the present invention is not limited to the one described above, and the method for producing the intermediate coating material and the top coating material may be the same as the method for producing the primer coating material.
It was confirmed that the undercoat layer coating (primer layer coating) has excellent adhesion performance, and the intermediate layer coating and the top coat layer paint are excellent in adhesion strength, salt water resistance and hardness.
Hereinafter, a method of coating a steel structure of a bridge using an environmentally friendly paint according to the present invention will be described.
1. Steel box surface cleanup.
For example, in the case of steel bridges, corrosion occurs due to various causes such as aging and salt corrosion. In order to repair such a repair part, the maintenance part must be arranged first.
For example, in order to prevent the deterioration of adhesion between the coating layer and the steel, the corroded portion, the cracked portion and the peeled portion are removed and the foreign matter is removed.
2. Formation of primer layer (undercoat layer).
The primer coating is preferably applied to the surface of the steel structure by coating (spraying, spraying, etc.) at a thickness of preferably 20 to 60 탆, followed by curing (natural curing is possible, The primer layer is applied.
The primer layer is adhered to the steel material and the intermediate layer with strong adhesive force to prevent peeling of the coating layer.
3. Construction of middle floors.
After completion of the primer layer through the previous step, the intermediate coating is applied preferably to a thickness of 100 to 200 탆, followed by curing (for example, 12 to 15 hours).
4. Top layer formation.
The coating layer is applied on the surface of the middle layer, and the coating layer is formed on the surface of the steel structure.
5. Formation of environment-friendly coating layer.
As described above, the base layer and the coating layer are successively formed on the surface of the upper layer. At this time, it is possible to coat the coating layer coating material before the base layer is completely cured so as to increase the binding force between the base layer and the coating layer so that the coating layer coating material (in particular, the fiber reinforcing material)
Claims (3)
A second step of applying a primer coating to the surface of the steel structure after the first step and then forming a primer layer through curing;
A third step of coating the intermediate coating material on the surface of the undercoat layer formed through the second step and then forming the intermediate layer through curing;
A fourth step of applying a topcoat on the surface of the intermediate layer formed through the third step and curing the topcoat layer to form a topcoat layer;
And a fifth step of forming an environmentally friendly coating layer on the surface of the upper layer formed through the fourth step,
In the fourth step, 100 parts by weight of a mixture of 50 to 70% by weight of an acrylic polyol, 15 to 35% by weight of a diluent and 10 to 20% by weight of an additive, And 20 to 50 parts by weight of a curing agent which is an alicyclic isocyanate controlled to have a solid content of 50 to 50% by weight and a solid content of 30 to 70% by weight, is applied to form a top coat layer,
The fifth step is a step 5-1 of forming a base layer by coating a base layer coating composition composed of a material of particles or powder and epoxy on the base layer, 5 to 20 parts by weight of a fiber reinforcing material, 8 to 15 parts by weight of aluminum powder, 15 to 30 parts by weight of calcium carbonate, 4 to 8 parts by weight of a light stabilizer, and 3 to 7 parts by weight of a dispersing agent, based on 100 parts by weight of silicone, And forming a coating layer by coating,
The fibrous reinforcement is coated on its surface with magnesium, which prevents corrosion of the steel structure, through an epoxy to form a corrosion preventive layer,
In the step 5-1, coal pumice, which is a material of particles or powder, is coated with silica sand and mixed with epoxy to form a base layer, while roughing the surface of the base layer to increase the contact area with the coating layer And the adhesion of the coating layer is enhanced.
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| KR102267627B1 (en) * | 2020-11-20 | 2021-06-21 | 주식회사 성주안전 | Eco-friendly repair and reinforcement method and painting composition for bridge structures |
| KR102338798B1 (en) | 2021-03-12 | 2021-12-14 | 주식회사 송담건설 | A coating layer formed by using paint on steel and a steel coating method forming the same |
| KR102474976B1 (en) * | 2021-07-12 | 2022-12-06 | 배병인 | Method for preventing corrosion off steel structure using eco-friendly composite ceramic coating agent |
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