CN116814137A - Corrosion-resistant carbon steel stainless steel composite plate for desulfurization of power plant and processing technology thereof - Google Patents
Corrosion-resistant carbon steel stainless steel composite plate for desulfurization of power plant and processing technology thereof Download PDFInfo
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- CN116814137A CN116814137A CN202310582788.0A CN202310582788A CN116814137A CN 116814137 A CN116814137 A CN 116814137A CN 202310582788 A CN202310582788 A CN 202310582788A CN 116814137 A CN116814137 A CN 116814137A
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- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 69
- 239000010962 carbon steel Substances 0.000 title claims abstract description 69
- 239000010935 stainless steel Substances 0.000 title claims abstract description 67
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 67
- 239000002131 composite material Substances 0.000 title claims abstract description 59
- 238000005260 corrosion Methods 0.000 title claims abstract description 51
- 230000007797 corrosion Effects 0.000 title claims abstract description 49
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 18
- 230000023556 desulfurization Effects 0.000 title claims abstract description 18
- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 238000012545 processing Methods 0.000 title claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 47
- 238000000576 coating method Methods 0.000 claims abstract description 47
- 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 claims abstract description 46
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000003822 epoxy resin Substances 0.000 claims abstract description 34
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 34
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- WGGLDBIZIQMEGH-UHFFFAOYSA-N 1-bromo-4-ethenylbenzene Chemical compound BrC1=CC=C(C=C)C=C1 WGGLDBIZIQMEGH-UHFFFAOYSA-N 0.000 claims abstract description 18
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 54
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 26
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 25
- 229920001568 phenolic resin Polymers 0.000 claims description 25
- 239000005011 phenolic resin Substances 0.000 claims description 25
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 12
- MMEDJBFVJUFIDD-UHFFFAOYSA-N 2-[2-(carboxymethyl)phenyl]acetic acid Chemical compound OC(=O)CC1=CC=CC=C1CC(O)=O MMEDJBFVJUFIDD-UHFFFAOYSA-N 0.000 claims description 11
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 235000006408 oxalic acid Nutrition 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000009835 boiling Methods 0.000 claims description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 239000011256 inorganic filler Substances 0.000 claims description 6
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 6
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- LRWZZZWJMFNZIK-UHFFFAOYSA-N 2-chloro-3-methyloxirane Chemical compound CC1OC1Cl LRWZZZWJMFNZIK-UHFFFAOYSA-N 0.000 abstract description 10
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006555 catalytic reaction Methods 0.000 abstract description 2
- 238000004132 cross linking Methods 0.000 abstract description 2
- 239000002905 metal composite material Substances 0.000 abstract description 2
- 230000004913 activation Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 125000005504 styryl group Chemical group 0.000 abstract 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract 1
- 229920002554 vinyl polymer Polymers 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- YMOONIIMQBGTDU-VOTSOKGWSA-N [(e)-2-bromoethenyl]benzene Chemical compound Br\C=C\C1=CC=CC=C1 YMOONIIMQBGTDU-VOTSOKGWSA-N 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000113 differential scanning calorimetry Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241001633683 Centipeda <firmicute> Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- UNKQPEQSAGXBEV-UHFFFAOYSA-N formaldehyde;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound O=C.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 UNKQPEQSAGXBEV-UHFFFAOYSA-N 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004843 novolac epoxy resin Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Abstract
The invention relates to the technical field of metal composite materials, in particular to a corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant and a processing technology thereof. Bisphenol A is processed and reacted with formaldehyde under the catalysis of acid to generate polycondensate, and the synthesized polycondensate is reacted with epoxy chloropropane and p-bromostyrene to obtain phenolic epoxy resin. The epoxy resin is cured, so that the wear resistance and corrosion resistance of the coating are improved; the introduced styryl contains a benzene ring rigid structure, so that the crosslinking capability of the coating can be improved, and the heat resistance of the coating is enhanced; meanwhile, the vinyl on the benzene ring increases the length of the carbon chain to raise the curing temperature, and the double bond is present to form an activation center, so that the curing process can be carried out spontaneously without adding a curing agent. Meanwhile, the composite board made of the stainless steel plate coated with the carbon steel plate is used as a matrix, and the corrosion resistance, toughness, plasticity and the like of the matrix are improved.
Description
Technical Field
The invention relates to the technical field of metal composite materials, in particular to a corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant and a processing technology thereof.
Background
Among the desulfurization technologies of today, wet desulfurization is widely used in various thermal power plants due to its unique advantages such as wide application range, high efficiency, mature process technology, good treatment effect, etc. However, wet desulfurization has problems in use, such as high flue gas temperature, high content of entrained acidic substances, high content of contained solid substances, and the like, during flue gas treatment. And when equipment is damaged, the problems of difficult maintenance and the like are also faced, so that the high-temperature-resistant and corrosion-resistant requirements are set for the composite board.
In order to solve the problems, the invention provides a corrosion-resistant carbon steel stainless steel composite board.
Disclosure of Invention
The invention aims to provide a corrosion-resistant carbon steel stainless steel composite board for desulfurization of a power plant and a processing technology thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a corrosion-resistant carbon steel stainless steel composite sheet for desulfurization of power plant which characterized in that: the corrosion-resistant coating comprises a carbon steel stainless steel composite board and a corrosion-resistant coating coated on the surface of the composite board;
further, the carbon steel stainless steel composite plate is composed of carbon steel of the innermost layer and stainless steel plates clamped on two sides of the carbon steel plate from inside to outside; the method comprises the steps of carrying out a first treatment on the surface of the
Further, the corrosion-resistant coating is formed by drying and curing a corrosion-resistant coating liquid, and the corrosion-resistant coating liquid consists of 80-90 parts of phenolic epoxy resin, 2-6 parts of methyl ethyl ketone peroxide, 3-7 parts of cobalt octoate, 3-7 parts of dibutyl phthalate, 0.1-1 part of a silane coupling agent, 13-18 parts of glass flakes and 10-20 parts of inorganic filler according to mass fraction.
Further, the thickness of the carbon steel plate is 10-20mm, and the thickness of the stainless steel plate is 3-6mm.
Further, the silane coupling agent is KH-560.
Further, the inorganic filler is any one or the combination of a plurality of silicon oxide, wollastonite, aluminum oxide, aluminum hydroxide and talcum powder.
Further, the phenolic epoxy resin preparation steps are as follows:
step one: adding bisphenol A into n-butanol, stirring and dissolving at 70-90 ℃, cooling to 20-30 ℃, adding 30-60 wt% of formaldehyde aqueous solution, adding oxalic acid, heating to 90-110 ℃, preserving heat for 4-8 hours, distilling n-butanol and water at normal pressure, distilling n-butanol under reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling under reduced pressure, and dehydrating to obtain phenolic resin;
step two: mixing the obtained phenolic resin with epichlorohydrin and tetrabutylammonium bromide, heating to 90-110 ℃, preserving heat for 2-5h, cooling to 50-70 ℃, dropwise adding 20-30mL of 5-20wt% sodium hydroxide solution, dropwise adding p-bromostyrene liquid after 1-2h, slowly dropwise adding the p-bromostyrene liquid, reacting for 50-90min at 60-80 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin.
Further, according to parts by weight, in the first step, the mass ratio of bisphenol A to formaldehyde aqueous solution to oxalic acid is (20-28): (5-10): (0.1-1).
Further, according to parts by weight, in the second step, the mass ratio of the phenolic resin to the epoxy chloropropane to the tetrabutylammonium bromide to the bromostyrene is (5-9): (32-38): (0.1-0.3): (2-9).
The reaction is carried out in two steps in the preparation process, firstly bisphenol A and formaldehyde are used for preparing phenolic resin under the catalysis of acid, and then the phenolic resin is used for reacting with epoxy chloropropane and p-bromostyrene to prepare the phenolic epoxy resin.
Further, the processing technology of the carbon steel stainless steel composite board comprises the following steps:
step one: cutting carbon steel and stainless steel, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat for 0.5-3h at 1000-1200 ℃, rolling for 1-5m/s, wherein the thickness of the outlet of the first pass is 5-8mm, the thickness of the outlet of the second pass is 1-4mm, and cooling to 20-30 ℃ to obtain a sample;
step four: fully stirring and mixing bisphenol A formaldehyde novolac epoxy resin, methyl ethyl ketone peroxide, cobalt octoate, dibutyl phthalate, a silane coupling agent KH-560, glass flakes and an inorganic filler to obtain corrosion-resistant coating liquid;
step five: and (3) coating the coating liquid obtained in the step (IV) on the sample obtained in the step (III), curing for 1-4 hours at 170-200 ℃, and curing for 2-6 hours at 210-240 ℃ to obtain the carbon steel stainless steel composite board.
Compared with the prior art, the invention has the following beneficial effects:
1. in order to enhance the corrosion resistance of the matrix, the invention adopts a mode of hot-rolling the carbon steel Q235 wrapped by the stainless steel 316L to prepare the composite plate. Carbon steel Q235 has the characteristics of good plasticity, good toughness and the like, is not easy to crack during welding, but has poor corrosion resistance. And the stainless steel 316L has better corrosion resistance, wear resistance and high temperature resistance, but has poorer plasticity and toughness. The composite board prepared by compounding the two materials integrates the advantages of the two materials such as corrosion resistance, good plasticity, good toughness and the like, and simultaneously avoids the defects of a single matrix material.
2. In order to enhance the corrosion resistance of the material, bisphenol A is used for synthesizing phenolic epoxy resin. In the synthetic process, epoxy chloropropane is added, epoxy groups are introduced, and the epoxy resin is prepared, so that the obtained epoxy resin condensate has better corrosion resistance but low heat resistance. So that the molecular chain of the phenolic resin is prolonged by adding the p-bromostyrene. When the temperature is increased, the movement of the molecular chain of the resin is accelerated, the viscosity of the resin is reduced, and the double bond exists, so that the epoxy resin is cured through self double bond addition, thereby having higher curing temperature, wider curing temperature window and smooth film formation. Meanwhile, the introduction of benzene rings increases the relative content of benzene rings in the resin, the carbon residue rate is increased, the crosslinking degree of the epoxy resin is increased, and the heat resistance is enhanced.
3. When the coating is prepared, glass flakes are added, and in the heating process, bubbles, cracks and molecular cavities in the film are mutually ruptured, a compact anti-corrosion coating is formed on the surface, the anti-permeability performance of the coating is higher, and the anti-corrosion capability is further enhanced.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Purchasing route: stainless steel 316L, carbon steel Q235 were purchased from Centipeda Hei, inc.
Example 1.
The preparation method of the epoxy resin comprises the following steps:
step one: adding 22.8g of bisphenol A into 25mL of n-butanol, stirring and dissolving at 80 ℃, cooling to 25 ℃, adding 8.1g of formaldehyde aqueous solution with mass fraction of 37%, adding 0.26 oxalic acid, heating to 95 ℃, preserving heat for 6 hours, distilling n-butanol and water at normal pressure, distilling n-butanol at reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling and dehydrating at reduced pressure to obtain phenolic resin;
step two: mixing 6.5g of the prepared phenolic resin with 34.2g of epoxy chloropropane and 0.15g of tetrabutylammonium bromide, heating to 100 ℃, preserving heat for 3 hours, cooling to 55 ℃, dropwise adding 25g of 10% sodium hydroxide solution, dropwise adding p-bromostyrene after 1.5 hours, slowly dropwise adding the p-bromostyrene, reacting for 60 minutes at 65 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin.
The composite board processing technology comprises the following steps:
stainless steel carbon steel composition (wt.%)
Step one: selecting Q235 carbon steel with the thickness of 10mm and 316L stainless steel with the thickness of 4mm, cutting, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat at 1100 ℃ for 1h,1m/s rolling, wherein the thickness of the outlet of the first pass is 6mm, the thickness of the outlet of the second pass is 3mm, and cooling to 25 ℃ to obtain a sample;
step four: 86 parts of phenolic epoxy resin, 4 parts of methyl ethyl ketone peroxide, 5 parts of cobalt octoate, 5 parts of dibutyl phthalate, 0.5 part of silane coupling agent, 15 parts of glass flake, 6 parts of silicon oxide and 6 parts of aluminum oxide are fully stirred according to mass fraction, so that corrosion-resistant coating liquid is obtained;
step five: and (3) coating the coating liquid obtained in the step (IV) on the sample obtained in the step (III), curing for 2 hours at 180 ℃, and curing for 4 hours at 220 ℃ to obtain the carbon steel stainless steel composite board.
Example 2.
The preparation method of the epoxy resin comprises the following steps:
step one: adding 22.8g of bisphenol A into 25mL of n-butanol, stirring and dissolving at 70 ℃, cooling to 20 ℃, adding 8.1g of formaldehyde aqueous solution with mass fraction of 37%, adding 0.26 oxalic acid, heating to 90 ℃, preserving heat for 6 hours, distilling n-butanol and water at normal pressure, distilling n-butanol at reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling and dehydrating at reduced pressure to obtain phenolic resin;
step two: mixing 6.5g of the prepared phenolic resin with 34.2g of epoxy chloropropane and 0.15g of tetrabutylammonium bromide, heating to 90 ℃, preserving heat for 2 hours, cooling to 50 ℃, dropwise adding 25g of 10% sodium hydroxide solution, dropwise adding the mixture for 1.5 hours, slowly dropwise adding p-bromostyrene, reacting for 50 minutes at 60 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin.
The composite board processing technology comprises the following steps:
stainless steel carbon steel composition (wt.%)
Step one: selecting Q235 carbon steel with the thickness of 10mm and 316L stainless steel with the thickness of 4mm, cutting, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat for 1.5h at 1000 ℃, rolling for 1m/s, wherein the thickness of an outlet of the first pass is 6mm, the thickness of an outlet of the second pass is 3mm, and cooling to 20 ℃ to obtain a sample;
step four: 86 parts of phenolic epoxy resin, 4 parts of methyl ethyl ketone peroxide, 5 parts of cobalt octoate, 5 parts of dibutyl phthalate, 0.5 part of silane coupling agent, 15 parts of glass flake, 6 parts of silicon oxide and 6 parts of aluminum oxide are fully stirred according to mass fraction, so that corrosion-resistant coating liquid is obtained;
step five: and (3) coating the coating liquid obtained in the step (IV) on the sample obtained in the step (III), curing for 1h at 170 ℃, and curing for 2h at 210 ℃ to obtain the carbon steel stainless steel composite board.
Example 3.
The preparation method of the epoxy resin comprises the following steps:
step one: adding 22.8g of bisphenol A into 25mL of n-butanol, stirring and dissolving at 90 ℃, cooling to 30 ℃, adding 8.1g of formaldehyde aqueous solution with mass fraction of 37%, adding 0.26 oxalic acid, heating to 110 ℃, preserving heat for 8 hours, distilling n-butanol and water at normal pressure, distilling n-butanol at reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling and dehydrating at reduced pressure to obtain phenolic resin;
step two: mixing 6.5g of the prepared phenolic resin with 34.2g of epoxy chloropropane and 0.15g of tetrabutylammonium bromide, heating to 110 ℃, preserving heat for 5 hours, cooling to 70 ℃, dropwise adding 25g of 10% sodium hydroxide solution, dropwise adding p-bromostyrene after 2 hours, slowly dropwise adding the p-bromostyrene, reacting for 90 minutes at 80 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin.
The composite board processing technology comprises the following steps:
stainless steel carbon steel composition (wt.%)
Step one: selecting Q235 carbon steel with the thickness of 10mm and 316L stainless steel with the thickness of 4mm, cutting, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat at 1200 ℃ for 1h,1m/s rolling, wherein the thickness of the outlet of the first pass is 6mm, the thickness of the outlet of the second pass is 3mm, and cooling to 30 ℃ to obtain a sample;
step four: 86 parts of phenolic epoxy resin, 4 parts of methyl ethyl ketone peroxide, 5 parts of cobalt octoate, 5 parts of dibutyl phthalate, 0.5 part of silane coupling agent, 15 parts of glass flake, 6 parts of silicon oxide and 6 parts of aluminum oxide are fully stirred according to mass fraction, so that corrosion-resistant coating liquid is obtained;
step five: and (3) coating the coating liquid obtained in the step (IV) on the sample obtained in the step (III), curing for 4 hours at 200 ℃, and curing for 6 hours at the temperature of 240 ℃ to obtain the carbon steel stainless steel composite board.
Example 4.
The preparation method of the epoxy resin comprises the following steps:
step one: adding 22.8g of bisphenol A into 25mL of n-butanol, stirring and dissolving at 80 ℃, cooling to 20 ℃, adding 8.1g of formaldehyde aqueous solution with mass fraction of 37%, adding 0.26 oxalic acid, heating to 105 ℃, preserving heat for 7 hours, distilling n-butanol and water at normal pressure, distilling n-butanol at reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling and dehydrating at reduced pressure to obtain phenolic resin;
step two: mixing 6.5g of the prepared phenolic resin with 34.2g of epoxy chloropropane and 0.15g of tetrabutylammonium bromide, heating to 95 ℃, preserving heat for 4 hours, cooling to 65 ℃, dropwise adding 25g of 10% sodium hydroxide solution, dropwise adding p-bromostyrene after 1.5 hours, slowly dropwise adding the p-bromostyrene, reacting for 80 minutes at 75 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin.
The composite board processing technology comprises the following steps:
stainless steel carbon steel composition (wt.%)
Step one: selecting Q235 carbon steel with the thickness of 10mm and 316L stainless steel with the thickness of 4mm, cutting, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat at 1150 ℃ for 2 hours, rolling 1m/s, wherein the thickness of the outlet of the first pass is 6mm, the thickness of the outlet of the second pass is 3mm, and cooling to 25 ℃ to obtain a sample;
step four: 86 parts of phenolic epoxy resin, 4 parts of methyl ethyl ketone peroxide, 5 parts of cobalt octoate, 5 parts of dibutyl phthalate, 0.5 part of silane coupling agent, 15 parts of glass flake, 6 parts of silicon oxide and 6 parts of aluminum oxide are fully stirred according to mass fraction, so that corrosion-resistant coating liquid is obtained;
step five: and (3) coating the coating liquid obtained in the step (IV) on the sample obtained in the step (III), curing for 3 hours at 190 ℃, and curing for 5 hours at 230 ℃ to obtain the carbon steel stainless steel composite board.
Example 5.
Step one: adding 22.8g of bisphenol A into 25mL of n-butanol, stirring and dissolving at 82 ℃, cooling to 27 ℃, adding 8.1g of formaldehyde aqueous solution with the mass fraction of 37%, adding 0.26 oxalic acid, heating to 97 ℃, preserving heat for 7 hours, distilling n-butanol and water at normal pressure, distilling n-butanol at reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling and dehydrating at reduced pressure to obtain phenolic resin;
step two: mixing 6.5g of the prepared phenolic resin with 34.2g of epoxy chloropropane and 0.15g of tetrabutylammonium bromide, heating to 105 ℃, preserving heat for 4 hours, cooling to 57 ℃, dropwise adding 25g of 10% sodium hydroxide solution, dropwise adding p-bromostyrene after 1.5 hours, slowly dropwise adding the p-bromostyrene, reacting for 60 minutes at 65 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin.
The composite board processing technology comprises the following steps:
stainless steel carbon steel composition (wt.%)
Step one: selecting Q235 carbon steel with the thickness of 10mm and 316L stainless steel with the thickness of 4mm, cutting, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat for 2.5h at 1200 ℃, rolling 1m/s, wherein the thickness of an outlet of the first pass is 6mm, the thickness of an outlet of the second pass is 3mm, and cooling to 27 ℃ to obtain a sample;
step four: 86 parts of phenolic epoxy resin, 4 parts of methyl ethyl ketone peroxide, 5 parts of cobalt octoate, 5 parts of dibutyl phthalate, 0.5 part of silane coupling agent, 15 parts of glass flake, 6 parts of silicon oxide and 6 parts of aluminum oxide are fully stirred according to mass fraction, so that corrosion-resistant coating liquid is obtained;
step five: coating the coating liquid obtained in the step four on the sample obtained in the step three, curing for 2 hours at 185 ℃ and curing for 5 hours at 225 ℃ to obtain the carbon steel stainless steel composite board
Comparative example 1.
In contrast to example 1, no bromostyrene was added.
The preparation method of the epoxy resin comprises the following steps:
step one: adding 22.8 bisphenol A into 25mL of n-butanol, stirring and dissolving at 80 ℃, cooling to 25 ℃, adding 8.1g of formaldehyde aqueous solution with mass fraction of 37%, adding 0.26 oxalic acid, heating to 95 ℃, preserving heat for 6 hours, distilling n-butanol and water at normal pressure, distilling n-butanol at reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling and dehydrating at reduced pressure to obtain phenolic resin;
step two: mixing 6.5g of the prepared phenolic resin with 34.2g of epoxy chloropropane and 0.15g of tetrabutylammonium bromide, heating to 100 ℃, preserving heat for 3 hours, cooling to 55 ℃, dropwise adding 25g of 10% sodium hydroxide solution, finishing dripping for 1.5 hours, reacting for 60 minutes at 65 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin.
The composite board processing technology comprises the following steps:
stainless steel carbon steel composition (wt.%)
Step one: selecting Q235 carbon steel with the thickness of 10mm and 316L stainless steel with the thickness of 4mm, cutting, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat at 1100 ℃ for 1h,1m/s rolling, wherein the thickness of the outlet of the first pass is 6mm, the thickness of the outlet of the second pass is 3mm, and cooling to 25 ℃ to obtain a sample;
step four: 86 parts of phenolic epoxy resin, 4 parts of methyl ethyl ketone peroxide, 5 parts of cobalt octoate, 5 parts of dibutyl phthalate, 0.5 part of silane coupling agent, 15 parts of glass flake, 6 parts of silicon oxide and 6 parts of aluminum oxide are fully stirred according to mass fraction, so that corrosion-resistant coating liquid is obtained;
step five: and (3) coating the coating liquid obtained in the step (IV) on the sample obtained in the step (III), curing for 2 hours at 180 ℃, and curing for 4 hours at 220 ℃ to obtain the carbon steel stainless steel composite board.
Comparative example 2.
In contrast to example 1, epichlorohydrin was not added during the reaction.
The preparation method of the phenolic resin comprises the following steps:
step one: adding 22.8 bisphenol A into 25mL of n-butanol, stirring and dissolving at 80 ℃, cooling to 25 ℃, adding 8.1g of formaldehyde aqueous solution with mass fraction of 37%, adding 0.26 oxalic acid, heating to 95 ℃, preserving heat for 6 hours, distilling n-butanol and water at normal pressure, distilling n-butanol at reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling and dehydrating at reduced pressure to obtain phenolic resin;
step two: mixing 6.5g of the prepared phenolic resin with 0.15g of tetrabutylammonium bromide, heating to 100 ℃, preserving heat for 3 hours, cooling to 55 ℃, dropwise adding 25g of 10% sodium hydroxide solution, slowly dropwise adding p-bromostyrene after 1.5 hours are completed, reacting for 60 minutes at 65 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin
The composite board processing technology comprises the following steps:
examples stainless steel carbon steel composition (wt.%)
Step one: selecting Q235 carbon steel with the thickness of 10mm and 316L stainless steel with the thickness of 4mm, cutting, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat at 1100 ℃ for 1h,1m/s rolling, wherein the thickness of the outlet of the first pass is 6mm, the thickness of the outlet of the second pass is 3mm, and cooling to 25 ℃ to obtain a sample;
step four: 86 parts of phenolic epoxy resin, 4 parts of methyl ethyl ketone peroxide, 5 parts of cobalt octoate, 5 parts of dibutyl phthalate, 0.5 part of silane coupling agent, 15 parts of glass flake, 6 parts of silicon oxide and 6 parts of aluminum oxide are fully stirred according to mass fraction, so that corrosion-resistant coating liquid is obtained;
step five: and (3) coating the coating liquid obtained in the step (IV) on the sample obtained in the step (III), curing for 2 hours at 180 ℃, and curing for 4 hours at 220 ℃ to obtain the carbon steel stainless steel composite board.
Comparative example 3.
In contrast to example 1, no corrosion-resistant coating solution was applied.
The composite board processing technology comprises the following steps:
examples stainless steel carbon steel composition (wt.%)
Step one: selecting Q235 carbon steel with the thickness of 10mm and 316L stainless steel with the thickness of 4mm, cutting, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: and vacuumizing the blank, sealing the small hole, heating the blank, preserving heat at 1100 ℃ for 1h, rolling for 1m/s, wherein the thickness of the outlet of the first pass is 6mm, the thickness of the outlet of the second pass is 3mm, and cooling to 25 ℃ to obtain the carbon steel stainless steel composite plate.
Detection test:
the composite boards manufactured in the above examples 1 to 5 and comparative examples 1 to 3 were tested, and the coating thicknesses of the composite boards were the same.
The coating liquid prepared in the above examples 1-5 and comparative examples 1-2 was poured into a specific polytetrafluoroethylene mold, cured at 180℃for 2 hours, and cured at 220℃for 4 hours to obtain an individual coating, and the glass transition temperature was measured.
The detection method comprises the following steps:
1. acid resistance was tested using GB 1763-1979 (1989) at 80℃with 20% sulfuric acid solution.
2. According to national standard GB/T228, the mechanical test of material stretching is tested at room temperature of 25 ℃.
3. The glass transition temperature was measured using differential scanning calorimetric analysis (DSC).
The test results are shown in the following table:
according to the data in the table, all the data are compared with the data in the table, in the comparative example 1, no bromostyrene is added, the corrosion time of the steel plate is shortened, the corrosion resistance of the composite plate is deteriorated, the curing temperature window is reduced, and the heat resistance is reduced; in comparative example 2, no p-bromostyrene was added, and as can be seen from the table, the corrosion resistance became poor and the heat resistance also decreased; comparative example 3 was tested directly on a composite board substrate and found that the substrate also had some corrosion resistance.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a corrosion-resistant carbon steel stainless steel composite sheet for desulfurization of power plant which characterized in that: the corrosion-resistant coating comprises a carbon steel stainless steel composite board and a corrosion-resistant coating coated on the surface of the composite board;
the carbon steel stainless steel composite board is composed of carbon steel of the innermost layer and stainless steel plates clamped on two sides of the carbon steel plate from inside to outside;
the corrosion-resistant coating is formed by drying and curing a corrosion-resistant coating liquid, and the corrosion-resistant coating liquid consists of 80-90 parts of phenolic epoxy resin, 2-6 parts of methyl ethyl ketone peroxide, 3-7 parts of cobalt octoate, 3-7 parts of dibutyl phthalate, 0.1-1 part of a silane coupling agent, 13-18 parts of glass flakes and 10-20 parts of inorganic filler according to mass fraction.
2. The corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant according to claim 1, wherein: the thickness of the carbon steel plate is 10-20mm, and the thickness of the stainless steel plate is 3-6mm.
3. The corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant according to claim 1, wherein: the silane coupling agent is KH-560.
4. The corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant according to claim 1, wherein: the inorganic filler is any one or the combination of more of silicon oxide, wollastonite, aluminum oxide, aluminum hydroxide and talcum powder.
5. The corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant according to claim 1, wherein: the preparation method of the phenolic epoxy resin comprises the following steps:
step one: adding bisphenol A into n-butanol, stirring and dissolving at 70-90 ℃, cooling to 20-30 ℃, adding 30-60 wt% of formaldehyde aqueous solution, adding oxalic acid, heating to 90-110 ℃, preserving heat for 4-8 hours, distilling n-butanol and water at normal pressure, distilling n-butanol under reduced pressure, washing with boiling water, removing redundant bisphenol A, distilling under reduced pressure, and dehydrating to obtain phenolic resin;
step two: mixing the obtained phenolic resin with epichlorohydrin and tetrabutylammonium bromide, heating to 90-110 ℃, preserving heat for 2-5h, cooling to 50-70 ℃, dropwise adding 5-20wt% sodium hydroxide solution, dropwise adding p-bromostyrene liquid slowly after 1-2h, reacting for 50-90min at 60-80 ℃, purifying, drying, and distilling under reduced pressure to obtain the phenolic epoxy resin.
6. The corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant according to claim 5, wherein: according to parts by weight, the bisphenol A, formaldehyde aqueous solution and oxalic acid are mixed according to the mass ratio of (20-28): (5-10): (0.1-1).
7. The corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant according to claim 5, wherein: the mass ratio of the phenolic resin to the epichlorohydrin to the tetrabutylammonium bromide to the p-bromostyrene is (5-9): (32-38): (0.1-0.3): (2-9).
8. The corrosion-resistant carbon steel stainless steel composite plate for desulfurization of a power plant according to claim 5, wherein: the mass ratio of the phenolic resin to the sodium hydroxide solution is (5-9): (20-30).
9. The processing technology of the corrosion-resistant carbon steel stainless steel composite board for desulfurization of the power plant is characterized by comprising the following steps of:
step one: cutting carbon steel and stainless steel, polishing, cleaning and drying the surface of the material;
step two: two stainless steel plates are taken and clamped at two sides of a piece of carbon steel, welding and sealing are carried out, and a small hole is reserved at a composite interface at two sides to obtain a blank;
step three: vacuumizing the blank, sealing the small hole, heating the blank, preserving heat for 0.5-3h at 1000-1200 ℃, rolling for 1-5m/s, wherein the thickness of the outlet of the first pass is 5-8mm, the thickness of the outlet of the second pass is 1-4mm, and cooling to 20-30 ℃ to obtain a sample;
step four: fully stirring and mixing phenolic epoxy resin, methyl ethyl ketone peroxide, cobalt octoate, dibutyl phthalate, a silane coupling agent KH-560, glass flakes and inorganic filler to obtain corrosion-resistant coating liquid;
step five: and (3) coating the coating liquid obtained in the step (IV) on the sample obtained in the step (III), curing for 1-4 hours at 170-200 ℃, and curing for 2-6 hours at 210-240 ℃ to obtain the carbon steel stainless steel composite board.
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