CN108047882A - A kind of Oil Tank solvent epoxy varnish anti-corrosive primer, preparation method and application - Google Patents
A kind of Oil Tank solvent epoxy varnish anti-corrosive primer, preparation method and application Download PDFInfo
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- CN108047882A CN108047882A CN201711305742.5A CN201711305742A CN108047882A CN 108047882 A CN108047882 A CN 108047882A CN 201711305742 A CN201711305742 A CN 201711305742A CN 108047882 A CN108047882 A CN 108047882A
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- oil tank
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- corrosive primer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
This application provides a kind of Oil Tank solvent epoxy varnish anti-corrosive primer, its preparation method and application, the component of the priming paint includes according to weight fraction：20 35 parts of bisphenol F-type epoxy resin, 25 parts of glass fibre, 5 10 parts of nano silicon dioxide, 5 10 parts of mica powder, 40 55 parts of curing agent, 13 parts of antifoaming agent, 24 parts of dispersant, 24 parts of levelling agent, 10 20 parts of 0.5 3 parts of silane coupling agent, 3 10 parts of coalescents and solvent.Oil Tank solvent epoxy varnish anti-corrosive primer, its preparation method and the application that the application provides, add in glass fibre, nano silicon dioxide and mica powder, help to improve the compactness of priming paint paint film, so as to improve the corrosion-resistant and rustless property of priming paint, the stability and adhesive force of Oil Tank anti-decaying paint are added.
Description
Technical field
This application involves technical field of coatings more particularly to a kind of Oil Tank solvent epoxy varnish anti-corrosive primer, its
Preparation method and application.
Background technology
Oil, also known as crude oil, are that a kind of sticky, dark brown liquid upper crustal some areas have petroleum storage.Mainly
Ingredient is the mixture of various alkane, cycloalkane, aromatic hydrocarbon, additionally comprising elements such as sulphur, oxygen, nitrogen, phosphorus, vanadium.With oil system
The fuel oil and gasoline of work become one of most important energy, while oil or the raw material of many chemical products in the world.In this way,
Being stored in for oil is particularly important in the use transportational process of oil.
Oil Tank is one of most important storage container of oil, and existing Oil Tank is the metallic oil tanks such as steel mostly.Contain
There are the corrosive chemicals such as hydrogen sulfide, organic and inorganic salts and water, oil product storage tank can be caused to corrode, corrosion shortens
The service life of oil tank if timely preservative treatment cannot be carried out to metallic oil tank, can also pollute oil product, influence oil
Quality；It is heavy then because corrosion make oil tank perforate caused by oil leak, and be easy to cause fire, explosion, danger can think and
Know.
At present, Oil Tank anti-corrosion is mostly to use：The technologies such as metal spraying category, cathodic protection, antifouling paint.Wherein antifouling paint is most
To be extensive, the common main zinc-rich antifouling paint of antifouling paint, but zinc antifouling paint wetability is low, and adhesive force is low, and zinc powder adds
It is added in coating, the stability deficiency that zinc powder is merged with inorganic silicate.
The content of the invention
The application provides a kind of Oil Tank solvent epoxy varnish anti-corrosive primer, its preparation method and application, improves stone
The stability and adhesive force of oil tank anti-decaying paint.
A kind of Oil Tank solvent epoxy varnish anti-corrosive primer that the application provides, the component of the priming paint is according to weight
Fraction includes：
20-35 parts of bisphenol F-type epoxy resin, 2-5 parts of glass fibre, 5-10 parts of nano silicon dioxide, mica powder 5-
10 parts, 40-55 parts of curing agent, 1-3 parts of antifoaming agent, 2-4 parts of dispersant, 2-4 parts of levelling agent, 0.5-3 parts of silane coupling agent, into
10-20 parts of 3-10 parts of film auxiliary agent and solvent.
Optionally, above-mentioned Oil Tank is in solvent epoxy varnish anti-corrosive primer, and the component of the priming paint is according to weight point
Number includes：
30 parts of bisphenol F-type epoxy resin, 5 parts of glass fibre, 8 parts of nano silicon dioxide, 10 parts of mica powder, curing agent
45 parts, 2 parts of antifoaming agent, 4 parts of dispersant, 3 parts of levelling agent, 15 parts of 2 parts of silane coupling agent, 8 parts of coalescents and solvent.
Optionally, for above-mentioned Oil Tank in solvent epoxy varnish anti-corrosive primer, the curing agent includes polyamide
And/or modified polyimide resin.
Optionally, for above-mentioned Oil Tank in solvent epoxy varnish anti-corrosive primer, the solvent includes esters solvent or alcohol
Class solvent
Optionally, above-mentioned Oil Tank is in solvent epoxy varnish anti-corrosive primer, coalescents include ethylene glycol monobutyl ether,
Any one or a few in Lauryl Alcohol ester and propandiol butyl ether.
Optionally, above-mentioned Oil Tank is in solvent epoxy varnish anti-corrosive primer, the dispersant include polycarboxylate sodium,
Ammonium polyacrylate salt or polyacrylamide.
Optionally, in solvent epoxy varnish anti-corrosive primer, the antifoaming agent defoams above-mentioned Oil Tank including polyethers
Agent or polyether-modified silicon.
Second aspect, based on the Oil Tank solvent epoxy varnish anti-corrosive primer that the application provides, the application also provides
A kind of preparation method of Oil Tank with solvent epoxy varnish anti-corrosive primer, the preparation method include：
Antifoaming agent, dispersant, levelling agent and silane coupling agent are added in solvent, are uniformly mixed, forms the first mixing
Liquid；
Glass fibre, nano silicon dioxide and mica powder are added in first mixed liquor, are uniformly mixed, forms the
Two mixed liquors；
Bisphenol F-type epoxy resin is added in second mixed liquor, is uniformly mixed, forms the 3rd mixed liquor；
Curing agent is added to the 3rd mixed liquor, is uniformly mixed, forms Oil Tank solvent epoxy varnish antirust
Priming paint.
The third aspect, present invention also provides a kind of Oil Tank, the inner wall of Oil Tank sets anti-corrosive primer layer, the antirust
Prime coat is coated as the Oil Tank described in above-mentioned any one with solvent epoxy varnish anti-corrosive primer.
Bisphenol F-type epoxy resin is liquid bisphenol F epoxy resin, also known as Bisphenol F diglycidyl ether, referred to as
BPF is react to generate Bisphenol F under acidic catalyst by phenol and formaldehyde, then with epoxychloropropane in the presence of sodium hydroxide into
Row polycondensation reaction is made.Bisphenol F-type epoxy resin is to the immersion good of glass fibre.
Glass fiber heat-resistant is strong, high mechanical strength, corrosion resistance are good, general only rotten by concentrated base, hydrofluoric acid and concentrated phosphoric acid
Erosion, for improving the corrosion resistance of priming paint.
Nano silicon dioxide can improve the thixotropic property of anti-corrosive primer, and there is resist sagging effect in when use, is further ensured that
The compactness of paint film, while also improve the physical mechanical property of paint film, such as increase the hardness of paint film.
Mica powder is a kind of nonmetallic mineral, wherein mainly there is SiO2, content is generally in 49% or so, Al2O3Content exists
30% or so.Mica powder has the spies such as good elasticity, toughness, insulating properties, high temperature resistant, acid and alkali-resistance, corrosion-resistant, strong adhesive force
Property, it is a kind of excellent additive.Mica powder is used to fill the hole of paint film net structure, increases the compactness of paint film, makes bottom
Ability of the paint with splendid acid and alkali resistance, particularly salt fog, corrosion resistance gas.
In this application, curing agent includes polyamide and/or modified polyimide resin.Optional polyamide and modified amine
Resin compound, mixed proportion 3-5.In addition, the polyamide of mixing in modified polyimide resin with can also add in dimethylbenzene.
One kind or several of aromatic hydrocarbon solvent, esters solvent, ketones solvent, alcohols solvent, alcohol ethers solvent can be selected in solvent
Kind.Such as dimethylbenzene, methyl iso-butyl ketone (MIBK), butanol, butyl glycol ether, ethyl acetate.
Coalescents are also known as coalescing aid, can promote high-molecular compound Plastic Flow and flexible deformation, and then improve
Performance is coalesced, helps to form a film.In the embodiment of the present application, coalescents include ethylene glycol monobutyl ether, Lauryl Alcohol ester and the third two
Any one or a few in alcohol butyl ether.
Dispersant has a relatively low surface tension, and can be quickly wetting pigment, and then scattered Oil Tank solvent-borne type
Other compositions in epoxy resin antirust bottom paint.In the embodiment of the present application, dispersant includes polycarboxylate sodium, ammonium polyacrylate
Salt or polyacrylamide.
Antifoaming agent inhibits foam and generates or eliminate the foam generated to reduce surface tension.In the embodiment of the present application,
Antifoaming agent includes polyethers antifoaming agent or polyether-modified silicon.Such as GPE types antifoaming agent, GPES type antifoaming agent.
Levelling agent is a kind of common coating additive, it can promote coating formed during drying and forming-film one it is smooth,
Smooth, uniform film.It can effectively reduce and cover with paint, lacquer, colour wash, etc. liquid surface tension, improve Oil Tank solvent epoxy varnish anti-corrosive primer
Levelability and uniformity.Polymethylphenylsiloxane can be selected in levelling agent in the application.
It is very big on paint performance influence for silane coupling agent, and the performance of coupling agent and corresponding resin react, and can just make
The intensity of Compound paint improves.It is required that will be compatible with resin and coupling reaction can be played.
The technical solution that embodiments herein provides can include the following benefits：
The application provides a kind of Oil Tank solvent epoxy varnish anti-corrosive primer, preparation method and application, wherein, it is described
The component of priming paint includes according to weight fraction：20-35 parts of bisphenol F-type epoxy resin, 2-5 parts of glass fibre, nano-silica
5-10 parts of SiClx, 5-10 parts of mica powder, 40-55 parts of curing agent, 1-3 parts of antifoaming agent, 2-4 parts of dispersant, 2-4 parts of levelling agent, silicon
10-20 parts of 0.5-3 parts of alkane coupling agent, 3-10 parts of coalescents and solvent.The Oil Tank solvent-borne type prepared by mentioned reagent
Epoxy resin antirust bottom paint adds in glass fibre, nano silicon dioxide and mica powder in priming paint, helps to improve priming paint paint film
Compactness so as to improve the corrosion-resistant and rustless property of priming paint, adds the stability and adhesive force of Oil Tank anti-decaying paint.
It should be appreciated that above general description and following detailed description are only exemplary and explanatory, not
The application can be limited.
Specific embodiment
Below by the description to embodiment, the specific embodiment of the application is described in further detail, purpose
Be to aid in those skilled in the art has more complete, accurate and deep understanding, and helps to the design of the application, technical solution
In its implementation.
Embodiment 1
Oil Tank provided by the embodiments of the present application is with the component of solvent epoxy varnish anti-corrosive primer according to weight fraction bag
It includes：
30 parts of bisphenol F-type epoxy resin, 5 parts of glass fibre, 5 parts of nano silicon dioxide, 10 parts of mica powder, curing agent
45 parts, 2 parts of antifoaming agent, 4 parts of dispersant, 3 parts of levelling agent, 10 parts of 2 parts of silane coupling agent, 8 parts of coalescents and solvent.Cure
Polyamide is selected in agent, and antifoaming agent selects GPE type antifoaming agent, and dispersant selects polycarboxylate sodium, and levelling agent selects poly- methyl
Phenyl siloxane, coalescents select ethylene glycol monobutyl ether, and solvent selects alcohols solvent butanol.
The preparation method of Oil Tank solvent epoxy varnish anti-corrosive primer provided by the embodiments of the present application includes：
Antifoaming agent, dispersant, levelling agent and silane coupling agent are added in solvent, are uniformly mixed, forms the first mixing
Liquid；
Glass fibre, nano silicon dioxide and mica powder are added in first mixed liquor, are uniformly mixed, forms the
Two mixed liquors；
Bisphenol F-type epoxy resin is added in second mixed liquor, is uniformly mixed, forms the 3rd mixed liquor；
Curing agent is added to the 3rd mixed liquor, is uniformly mixed, forms Oil Tank solvent epoxy varnish antirust
Priming paint.
Embodiment 2
Oil Tank provided by the embodiments of the present application is with the component of solvent epoxy varnish anti-corrosive primer according to weight fraction bag
It includes：
25 parts of bisphenol F-type epoxy resin, 2 parts of glass fibre, 10 parts of nano silicon dioxide, 5 parts of mica powder, curing agent
40 parts, 3 parts of antifoaming agent, 2 parts of dispersant, 4 parts of levelling agent, 15 parts of 3 parts of silane coupling agent, 5 parts of coalescents and solvent.Cure
Modified polyimide resin is selected in agent, and antifoaming agent selects GPE type antifoaming agent, and dispersant selects ammonium polyacrylate salt, and levelling agent selects poly- first
Base phenyl siloxane, coalescents select Lauryl Alcohol ester, and solvent selects esters solvent ethyl acetate.
Oil Tank provided by the embodiments of the present application with the preparation method of solvent epoxy varnish anti-corrosive primer with embodiment 1,
Only it is that raw material selection and raw material proportioning are slightly different, details are not described herein.
Embodiment 3
Oil Tank provided by the embodiments of the present application is with the component of solvent epoxy varnish anti-corrosive primer according to weight fraction bag
It includes：
20 parts of bisphenol F-type epoxy resin, 3 parts of glass fibre, 9 parts of nano silicon dioxide, 8 parts of mica powder, curing agent
50 parts, 3 parts of antifoaming agent, 4 parts of dispersant, 2 parts of levelling agent, 20 parts of 2.5 parts of silane coupling agent, 10 parts of coalescents and solvent.Gu
Agent selects 3:The polyamide of 1 mixing and modified polyimide resin, antifoaming agent select GPES type antifoaming agent, and dispersant selects poly- third
Acrylamide, levelling agent select polymethylphenylsiloxane, and coalescents select propandiol butyl ether, and solvent selects alcohols solvent fourth
Alcohol.
Oil Tank provided by the embodiments of the present application with the preparation method of solvent epoxy varnish anti-corrosive primer with embodiment 1,
Only it is that raw material selection and raw material proportioning are slightly different, details are not described herein.
Embodiment 4
Oil Tank provided by the embodiments of the present application is with the component of solvent epoxy varnish anti-corrosive primer according to weight fraction bag
It includes：
35 parts of bisphenol F-type epoxy resin, 4 parts of glass fibre, 10 parts of nano silicon dioxide, 10 parts of mica powder, curing
48 parts of agent, 2 parts of antifoaming agent, 4 parts of dispersant, 4 parts of levelling agent, 18 parts of 1.5 parts of silane coupling agent, 8 parts of coalescents and solvent.
Curing agent selects 5:The polyamide of 1 mixing and modified polyimide resin, antifoaming agent select GPES type antifoaming agent, and dispersant is selected poly-
Acrylamide, levelling agent select polymethylphenylsiloxane, and coalescents select 1:1:The ethylene glycol monobutyl ether of 1 mixing, 12
Carbon alcohol ester and propandiol butyl ether, solvent select alcohols solvent butanol.
Oil Tank provided by the embodiments of the present application with the preparation method of solvent epoxy varnish anti-corrosive primer with embodiment 1,
Only it is that raw material selection and raw material proportioning are slightly different, details are not described herein.
Those skilled in the art will readily occur to the application its after considering specification and putting into practice the disclosure applied here
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.Description and embodiments are considered only as illustratively, and the true scope and spirit of the application are by following
Claim is pointed out.
It should be appreciated that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relation or order.Scope of the present application is only limited by appended claim.
Claims (9)
1. a kind of Oil Tank solvent epoxy varnish anti-corrosive primer, which is characterized in that the component of the priming paint is according to weight point
Number includes：
20-35 parts of bisphenol F-type epoxy resin, 2-5 parts of glass fibre, 5-10 parts of nano silicon dioxide, 5-10 parts of mica powder,
40-55 parts of curing agent, 1-3 parts of antifoaming agent, 2-4 parts of dispersant, 2-4 parts of levelling agent, 0.5-3 parts of silane coupling agent, coalescents
3-10 parts and 10-20 parts of solvent.
2. Oil Tank according to claim 1 solvent epoxy varnish anti-corrosive primer, which is characterized in that the priming paint
Component includes according to weight fraction：
30 parts of bisphenol F-type epoxy resin, 5 parts of glass fibre, 8 parts of nano silicon dioxide, 10 parts of mica powder, curing agent 45
Part, 2 parts of antifoaming agent, 4 parts of dispersant, 3 parts of levelling agent, 15 parts of 2 parts of silane coupling agent, 8 parts of coalescents and solvent.
3. Oil Tank according to claim 1 or 2 solvent epoxy varnish anti-corrosive primer, which is characterized in that described solid
Agent includes polyamide and/or modified polyimide resin.
4. Oil Tank according to claim 1 or 2 solvent epoxy varnish anti-corrosive primer, which is characterized in that described molten
Agent includes esters solvent or alcohols solvent.
5. Oil Tank according to claim 1 or 2 solvent epoxy varnish anti-corrosive primer, which is characterized in that film forming helps
Agent includes any one or a few in ethylene glycol monobutyl ether, Lauryl Alcohol ester and propandiol butyl ether.
6. Oil Tank according to claim 1 or 2 solvent epoxy varnish anti-corrosive primer, which is characterized in that described point
Powder includes polycarboxylate sodium, ammonium polyacrylate salt or polyacrylamide.
7. Oil Tank according to claim 1 or 2 solvent epoxy varnish anti-corrosive primer, which is characterized in that described to disappear
Infusion includes polyethers antifoaming agent or polyether-modified silicon.
A kind of 8. Oil Tank preparation method of solvent epoxy varnish anti-corrosive primer, which is characterized in that the preparation method bag
It includes：
Antifoaming agent, dispersant, levelling agent and silane coupling agent are added in solvent, are uniformly mixed, forms the first mixed liquor；
Glass fibre, nano silicon dioxide and mica powder are added in first mixed liquor, are uniformly mixed, it is mixed to form second
Close liquid；
Bisphenol F-type epoxy resin is added in second mixed liquor, is uniformly mixed, forms the 3rd mixed liquor；
Curing agent is added to the 3rd mixed liquor, is uniformly mixed, forms Oil Tank solvent epoxy varnish anti-corrosive primer.
9. a kind of Oil Tank, which is characterized in that the inner wall of Oil Tank sets anti-corrosive primer layer, and the anti-corrosive primer layer will by right
The Oil Tank described in 1-7 any one is asked to be coated with solvent epoxy varnish anti-corrosive primer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305742.5A CN108047882A (en) | 2017-12-11 | 2017-12-11 | A kind of Oil Tank solvent epoxy varnish anti-corrosive primer, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305742.5A CN108047882A (en) | 2017-12-11 | 2017-12-11 | A kind of Oil Tank solvent epoxy varnish anti-corrosive primer, preparation method and application |
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| Publication Number | Publication Date |
|---|---|
| CN108047882A true CN108047882A (en) | 2018-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711305742.5A Pending CN108047882A (en) | 2017-12-11 | 2017-12-11 | A kind of Oil Tank solvent epoxy varnish anti-corrosive primer, preparation method and application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643253A (en) * | 2019-08-23 | 2020-01-03 | 广州凌玮科技股份有限公司 | Oily antirust primer and application thereof |
| CN115261085A (en) * | 2022-08-01 | 2022-11-01 | 北京中冶和坤天冕工程技术有限公司 | Coke oven gas purification method |
| CN116376395A (en) * | 2023-03-21 | 2023-07-04 | 广东长大道路养护有限公司 | Steel bar antirust coating and construction method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106366859A (en) * | 2016-08-30 | 2017-02-01 | 北京碧海舟腐蚀防护工业股份有限公司 | General anticorrosive paint, general anticorrosive coating and offshore engineering structure containing general anticorrosive coating |
-
2017
- 2017-12-11 CN CN201711305742.5A patent/CN108047882A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106366859A (en) * | 2016-08-30 | 2017-02-01 | 北京碧海舟腐蚀防护工业股份有限公司 | General anticorrosive paint, general anticorrosive coating and offshore engineering structure containing general anticorrosive coating |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643253A (en) * | 2019-08-23 | 2020-01-03 | 广州凌玮科技股份有限公司 | Oily antirust primer and application thereof |
| CN115261085A (en) * | 2022-08-01 | 2022-11-01 | 北京中冶和坤天冕工程技术有限公司 | Coke oven gas purification method |
| CN115261085B (en) * | 2022-08-01 | 2023-09-01 | 北京中冶和坤天冕工程技术有限公司 | Coke oven gas purifying method |
| CN116376395A (en) * | 2023-03-21 | 2023-07-04 | 广东长大道路养护有限公司 | Steel bar antirust coating and construction method thereof |
| CN116376395B (en) * | 2023-03-21 | 2024-01-12 | 广东长大道路养护有限公司 | Steel bar antirust coating and construction method thereof |
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Application publication date: 20180518 |