CN107556869B - A kind of high performance pipeline anticorrosive paint - Google Patents
A kind of high performance pipeline anticorrosive paint Download PDFInfo
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- CN107556869B CN107556869B CN201710825059.8A CN201710825059A CN107556869B CN 107556869 B CN107556869 B CN 107556869B CN 201710825059 A CN201710825059 A CN 201710825059A CN 107556869 B CN107556869 B CN 107556869B
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- flyash
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- coal ash
- anticorrosive paint
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Abstract
The present invention relates to paint fields, especially a kind of high performance pipeline anticorrosive paint, it includes 40~60 parts of epoxy resin, 30~40 parts of flyash, 5~10 parts of rust resisting pigment, 20~30 parts of polyurethane, 5~8 parts of chain extender, 1~3 part of modified asbestos, wherein flyash is modified coal ash, the modified coal ash is that flotation agent is added in powdered coal ash, flotation is stirred evenly, by obtained tailing after magnetic separation separates, adds TiO2Modification obtains.Powdered coal ash have passed through desulfurization process before flotation, avoid corrosion of the sulphur component to pipeline.Coating high solids content of the present invention, tensile strength is high, and viscosity is high, and the inside and outside wall anti-corrosion suitable for pipeline can significantly inhibit photoetch effect particularly with outer wall；In addition, present invention utilizes industrial waste flyash, the cost of anticorrosive paint is on the one hand reduced, on the other hand reduces pollution caused by flyash direct emission.
Description
Technical field
The present invention relates to paint field, especially a kind of high performance pipeline anticorrosive paint.
Background technique
The steel pipe for conveying natural gas presses the difference of its corrosion location, is divided into inner wall corrosion and outer wall corrosion.For in pipeline
Wall may contain water, hydrogen sulfide, carbon dioxide, oxygen, sulfide or other corrosive compounds in the natural gas of conveying.Water exists
Inner wall of the pipe generates one layer of hydrophilic film, forms the condition of galvanic corrosion, generates electrochemical corrosion；Corrosive compound is direct
It reacts with metal, causes chemical attack.One of inner wall of the pipe anti-corrosion measure is exactly to be applied in pipeline with synthetic resin anticorrosion
Material etc. makees inner coating, can prevent the corrosion of inner wall of the pipe, and can reduce the roughness of tube wall, correspondingly improve the defeated of pipeline
Gas ability.However synthetic resin carries out anti-corrosion as coating, cost is higher, needs to add a kind of filler, can enhance its anti-corrosion
Performance, and the substance of cost can be reduced.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of high performance pipeline anticorrosive paints, to industrial waste flyash
It is modified, and the components such as itself and epoxy resin is mixed with out High Performance Corrosion Protective Coatings, with high viscosity, high solids content
Feature, antiseptic property are better than 3pe.
In order to achieve the above object, The technical solution adopted by the invention is as follows:
One aspect of the present invention provides a kind of high performance pipeline anticorrosive paint, including following parts by weight substance: epoxy resin
40~60 parts, 30~40 parts of flyash, 5~10 parts of rust resisting pigment, 20~30 parts of polyurethane, 5~8 parts of chain extender.Rust resisting pigment
It can be phosphate, molybdate or borate, the preferred trbasic zinc phosphate of molybdate.Epoxy resin in the presence of chain extender to polyurethane into
Row chain extension generates high polymer, toughness enhancing, Adhesion enhancement.Chain extender can be 1,4- butanediol.When preparing coating, first will
Epoxy resin, polyurethane and chain extender Hybrid Heating are reacted, and are then mixed into flyash, rust resisting pigment.Oxygen in flyash
Compound mainly includes SiO2、Al2O3、FeO、Fe2O3、CaO、TiO2And SO3, that wherein content is more is SiO2、SO3And CaO,
Secondary is Al2O3, SiO in flyash2、Al2O3All it is active advantageous component with CaO, is conducive in conjunction with film forming matter, sulphur exists
A part is in flyash with soluble plasters (CaSO4) form exist, it for increase coating intensity have certain effect, because
Sulphur in this flyash is also advantageous that composition to flyash activity.Using polyurethane high polymer, flyash as major ingredient, in other auxiliary agents
In the presence of be uniformly mixed anticorrosive paint can be made finer and close in metallic conduit adsorption, the tough and tensile not cracky of coating.Coating
It is highly filled, quick solidifying, the tough and tensile solid not cracky of coating.
Preferably, the particle size range of the flyash is 100~200 μm.100 μm of partial size < lead to coating mobility mistake
Greatly, then dispersibility is poor in system greater than 200 μm for partial size.
In order to improve the activity of flyash, it is set to generate stronger adhesive force with film forming matter, the flyash is to be modified
Flyash, preparation method are: first will add flotation agent in powdered coal ash, stir evenly flotation, by obtained tailing through magnetic
After choosing separation, TiO is added2Modification obtains.Contain coarse porous vitreum in powdered coal ash, mixing speed controls when stirring
In 1000~1200r/min, keep the particles of vitreous in powdered coal ash broken, release particles of vitreous bonding, table is compared in increase
Area increases adsorption activity；Aluminium-oxygen bond rupture of silicon-oxygen key in silica and aluminum oxide simultaneously generates free
Base, bioactive molecule increase, and surface free energy increases, and adsorption activity improves.
In a specific embodiment, powdered coal ash is placed in agitator, adds flotation agent, stirs evenly, so
After be sent into micro-bubble flotation machine, by the flyash after flotation be transferred to magnetic separator separation, by flyash Iron Ore Powder separate, remaining powder
Coal ash addition neopelex, water are mixed, and neopelex and flyash weight ratio be 0.1~
0.2%:1 obtains fine coal ash suspension, adds titanium sulfate then according to the weight ratio of flyash and titanium sulfate 1:1~1.2, protects
Hold pH2~3, react 5 hours, be filtered, washed, filter and obtain powder, will powder dry after add titanium dioxide, the titanium dioxide
The weight ratio of titanium and powder is 0.3%:1.After flotation, most charcoal resides in concentrate flyash, selects therein
Tailing carries out Magneto separate, then removes Iron Ore Powder, and charcoal is capable of the corrosion of catalytic metal, therefore should be divided the charcoal in flyash
From Iron Ore Powder can form new battery with the metal in pipeline, cause corrosion, therefore be also required to be removed.In obtained powder
It is internal that there is duct containing a certain amount of fly ash microsphere, powder is preferably subjected to ultrasonication, increases its duct, it will
The impurity for blocking gap is rejected, and physics adsorption capacity is enhanced.Titanium dioxide is able to ascend the suction of flyash and polyurethane high polymer
Attached performance, and there is light Anticorrosive Character, a small amount of titanium dioxide is mixed with flyash, obtained mixture is modified fine coal
Ash, titanium dioxide can be attached on fly ash microsphere.In this way, can be supported when High Performance Corrosion Protective Coatings are used for pipeline outer wall
It is anti-light to shine bring corrosion effect.
Preferably, the powdered coal ash have passed through desulfurization process before flotation.Sulfide has metal in flyash
Corrosiveness should be removed.Sulfur removal technology uses existing flyash sulfur removal technology.
Preferably, the flotation agent is sodium carboxymethylcellulose.Sodium carboxymethylcellulose is a kind of silica inhibitor,
In floatation process, silica can be deposited in tailing.
It further include 5~10 parts of flyash dispersing agent to make flyash be uniformly dispersed in the epoxy.Flyash dispersion
Agent can be silane coupling agent, can improve the lipophilicity of flyash, for fly ash microsphere and epoxy resin to have
Effect combines, and can be used as the dispersing agent of flyash.It is preferred that KH550 silane coupling agent, KH550 silane coupling agent is in flyash table
Thin monolayer is adsorbed and is formed in face, can significantly improve the interface compatibility between flyash and epoxy resin.
It preferably, further include 1~3 part of modified asbestos be modified by guar gum.If the additive amount of modified asbestos is higher than 3
Part, it will keep anticorrosive paint really up to the mark, within the scope of 1~3 part, can make coating that there is certain intensity and toughness.
Preferably, the modified asbestos are that Sodium Polyacrylate adds guar gum under alkaline condition, and it is anti-that asbestos are then added
It should obtain modified asbestos.The modified viscosity that can enhance coating of guar gum.
The present invention by by flyash be added epoxy resin coating in, make the absorption film-forming performance enhancement of anticorrosive paint,
And the intensity, toughness of coating itself increases, viscosity is higher, suitable for the inside and outside wall anti-corrosion of pipeline, particularly with outer wall, energy
Enough significantly inhibit photoetch effect；In addition, on the one hand the cost of anticorrosive paint is reduced for the recycling of flyash, it is another
Flyash is rationally utilized in aspect, reduces pollution caused by it is directly abandoned.
Specific embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.
Embodiment 1
High performance pipeline anticorrosive paint, including following parts by weight substance: 40 parts of epoxy resin, 40 parts of flyash, trbasic zinc phosphate 5
Part, 20 parts of polyurethane, 5 parts of 1,4-butanediol, 8 parts of KH550 silane coupling agent.Its prepare when first by epoxy resin, polyurethane and
Chain extender heats hybrid reaction 30min, is blended into other raw materials after generating high polymer.
Flyash is modified coal ash, is by after powdered coal ash desulfurization process, addition sodium carboxymethylcellulose mixes
The tailing after flotation is separated in stirring, 1000~1200r/min of mixing speed, then flotation, is carried out magnetic separation separation, is obtained
To the flyash for being free of Iron Ore Powder, as flyash 1, the addition of flyash 1 neopelex, water are mixed, ten
The weight ratio of dialkyl benzene sulfonic acids sodium and flyash 1 is 0.1%:1, then according to weight ratio flyash 1 and titanium sulfate weight ratio
For 1:1, titanium sulfate is added, keeping pH is 3, reacts 5 hours, obtains powder by being filtered, washed, filtering, powder is surpassed
Sonicated 1h, then dry powder, adds titanium dioxide, and titanium dioxide and powder weight ratio are 0.3%:1, obtains modified powder
Coal ash.
Comparative example 1
40 parts of epoxy resin, 40 parts of flyash, 5 parts of zinc borate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, KH550 silane
8 parts of coupling agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, after generating high polymer
It is blended into other raw materials.Flyash modified technique is the same as embodiment 1
Embodiment 2
50 parts of epoxy resin, 40 parts of flyash, 5 parts of trbasic zinc phosphate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, KH550 silane
8 parts of coupling agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, after generating high polymer
It is blended into other raw materials.Flyash modified technique is the same as embodiment 1.
Comparative example 2
50 parts of epoxy resin, 40 parts of flyash, 5 parts of trbasic zinc phosphate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, Aluminate coupling
8 parts of agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, mixed again after generating high polymer
Enter other raw materials.Flyash modified technique is the same as embodiment 1
Embodiment 3
60 parts of epoxy resin, 40 parts of flyash, 5 parts of trbasic zinc phosphate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, KH550 silane
8 parts of coupling agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, after generating high polymer
It is blended into other raw materials.Flyash modified technique is the same as embodiment 1.
Comparative example 3
60 parts of epoxy resin, 40 parts of flyash, 5 parts of trbasic zinc phosphate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, KH550 silane
8 parts of coupling agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, after generating high polymer
It is blended into other raw materials.
Flyash is modified coal ash, is by after powdered coal ash desulfurization process, addition sodium carboxymethylcellulose mixes
The tailing after flotation is separated in stirring, 1000~1200r/min of mixing speed, then flotation, is carried out magnetic separation separation, is obtained
To the flyash for being free of Iron Ore Powder, as modified coal ash.
Embodiment 4
40 parts of epoxy resin, 30 parts of flyash, 5 parts of trbasic zinc phosphate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, KH550 silane
8 parts of coupling agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, after generating high polymer
It is blended into other raw materials.Flyash modified technique is the same as embodiment 1.
Comparative example 4
40 parts of epoxy resin, 30 parts of flyash, 5 parts of trbasic zinc phosphate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, KH550 silane
8 parts of coupling agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, after generating high polymer
It is blended into other raw materials.
Flyash is modified coal ash, is by after powdered coal ash desulfurization process, addition sodium carboxymethylcellulose mixes
The tailing after flotation is separated in stirring, 600~800r/min of mixing speed, then flotation, is carried out magnetic separation separation, is obtained
Flyash without Iron Ore Powder, as flyash 1 mix the addition of flyash 1 neopelex, water, 12
The weight ratio of sodium alkyl benzene sulfonate and flyash 1 is 0.1%:1, is then according to weight ratio flyash 1 and titanium sulfate weight ratio
1:1 adds titanium sulfate, and keeping pH is 3, reacts 5 hours, obtains powder by being filtered, washed, filtering, and powder is carried out ultrasound
Wave handles 1h, then dry powder, adds titanium dioxide, and titanium dioxide and powder weight ratio are 0.3%:1, obtains modified fine coal
Ash.
Embodiment 5
50 parts of epoxy resin, 30 parts of flyash, 5 parts of trbasic zinc phosphate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, KH550 silane
8 parts of coupling agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, after generating high polymer
It is blended into other raw materials.Flyash modified technique is the same as embodiment 1.
Comparative example 5
50 parts of epoxy resin, 30 parts of flyash, 5 parts of trbasic zinc phosphate, 20 parts of polyurethane, 5 parts of 1,4-butanediol, KH550 silane
8 parts of coupling agent.Epoxy resin, polyurethane and 1,4-butanediol are first heated into hybrid reaction 30min when preparation, after generating high polymer
It is blended into other raw materials.
Flyash is modified coal ash, is by after powdered coal ash desulfurization process, and addition lime is mixed, stirring speed
1000~1200r/min is spent, the tailing after flotation is separated in then flotation, carries out magnetic separation separation, is obtained without Iron Ore Powder
Flyash, flyash 1 adds neopelex, water mixes by as flyash 1, lime and flyash 1
Weight ratio is 0.1%:1, is then 1:1 according to weight ratio flyash 1 and titanium sulfate weight ratio, adds titanium sulfate, and holding pH is
3, it reacts 5 hours, obtains powder by being filtered, washed, filtering, powder is subjected to ultrasonication 1h, then dry powder, adds
Add titanium dioxide, titanium dioxide and powder weight ratio are 0.3%:1, obtain modified coal ash.
Embodiment 6
High performance pipeline anticorrosive paint, including following parts by weight substance: 40 parts of epoxy resin, 40 parts of flyash, trbasic zinc phosphate 5
Part, 20 parts of polyurethane, 5 parts of 1,4-butanediol, 8 parts of KH550 silane coupling agent, 2 parts of modified asbestos.First by asphalt mixtures modified by epoxy resin when it is prepared
Rouge, polyurethane and 1,4-butanediol heat hybrid reaction 30min, are blended into other raw materials after generating high polymer.Other steps are same
Embodiment 1.
The High Performance Corrosion Protective Coatings and 3PE that above-described embodiment and comparative example are obtained carry out antiseptic property test, each performance
Parameter is detected according to relevant national standard, and it is as follows to obtain result:
Table 1
Table 2
Examples 1 to 5 is respectively the high performance pipeline anticorrosive paint that different ratios of raw materials obtains, and various performance indicators have
Slightly change, embodiment 6 is the high performance pipeline anticorrosive paint for being added to modified asbestos, melt flow rate decline, resistance to punching
Hitting property, tensile strength and peel strength enhancing, coating are not easy to be destroyed.
Zinc phosphate rust-preventive pigment is replaced using zinc borate in comparative example 1, the decline of acid and alkali resistance corrosive effect, trbasic zinc phosphate can
So that whole system anticorrosion ability is promoted.Aluminate coupling agent is used in comparative example 2 as flyash dispersing agent, for
The dispersion effect of flyash is poor, and the melt flow rate of anticorrosive paint is caused to increase, and tensile shear strength reduces, to pipeline
Adsorption effect weakens, and acid and alkali resistance corrosivity reduces.The anticorrosive paint of comparative example 3 does not carry out titania modified, flyash pair
The absorption property of duct wall weakens, and the melt flow rate of anticorrosive paint increases, and viscosity reduces, peel strength, stretching
Intensity reduces, and coating is easy cracking peeling when anticorrosive paint uses, and anti-corrosion effect reduces.Comparative example 4 to it is flyash modified when
Stirring rate reduces, and the large particulate matter in flyash leads to the reduction of coating adsorptivity, and anti-corrosion effect reduces, coating melt-flow
Rate increases, viscosity decline.Silica can not be stayed in tailing, be led as flotation agent using lime in comparative example 5
It causes a large amount of active components to scatter and disappear, corrosive pipeline rate is caused to be promoted, anti-corrosion effect reduces.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For, the invention can have various changes and changes.All any modifications made within the spirit and principles of the present invention are equal
Replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of high performance pipeline anticorrosive paint, which is characterized in that including following parts by weight substance: 40~60 parts of epoxy resin,
30~40 parts of flyash, 5~10 parts of rust resisting pigment, 20~30 parts of polyurethane, 5~8 parts of chain extender；
The flyash is modified coal ash, is by after powdered coal ash desulfurization process, addition sodium carboxymethylcellulose mixes
The tailing after flotation is separated in stirring, 1000~1200r/min of mixing speed, then flotation, is carried out magnetic separation separation, is obtained
To the flyash for being free of Iron Ore Powder, as flyash 1, the addition of flyash 1 neopelex, water are mixed, ten
The weight ratio of dialkyl benzene sulfonic acids sodium and flyash 1 is 0.1%:1, is then 1:1 according to flyash 1 and titanium sulfate weight ratio,
Titanium sulfate is added, keeping pH is 3, reacts 5 hours, obtains powder by being filtered, washed, filtering, and powder is carried out at ultrasonic wave
1h is managed, then dry powder, add titanium dioxide, titanium dioxide and powder weight ratio are 0.3%:1, obtain modified coal ash.
2. high performance pipeline anticorrosive paint according to claim 1, which is characterized in that the particle size range of the flyash is
200~300 μm.
3. high performance pipeline anticorrosive paint according to claim 1, which is characterized in that further include flyash dispersing agent 5~
10 parts, the flyash dispersing agent is coupling agent.
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| CN101602912A (en) * | 2009-04-14 | 2009-12-16 | 中华制漆（深圳）有限公司 | A kind of pipeline coating, with and the preparation with the use method |
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| CN104087126A (en) * | 2014-07-15 | 2014-10-08 | 南京航空航天大学 | Marine anticorrosive coating |
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Inventor after: Li Peng Inventor after: Qiu Hang Inventor after: Tu Jin Inventor after: Guan Jingfeng Inventor after: Zhong Jiahua Inventor after: Xu Yi Inventor after: Zhou Qingwen Inventor after: Yu Benhe Inventor before: Li Peng Inventor before: Qiu Hang Inventor before: Tu Jin Inventor before: Guan Jingfeng Inventor before: Zhong Jiahua Inventor before: Zhou Qingwen Inventor before: Yu Benhe |
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Effective date of registration: 20190903 Address after: 266000 Zhenping Road No. 2, Sifang District, Qingdao City, Shandong Province Co-patentee after: QINGDAO LUOBAO ENERGY SAVING TECHNOLOGY CO., LTD. Patentee after: Qingdao Taineng Technology Industrial Development Co., Ltd. Address before: 266000 People's Road 399 A, North District, Qingdao City, Shandong Province Patentee before: Qingdao Taineng Technology Industrial Development Co., Ltd. |
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