CN109749571A - A kind of preparation method of erosion shield and its application in metal pipe material field - Google Patents
A kind of preparation method of erosion shield and its application in metal pipe material field Download PDFInfo
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- CN109749571A CN109749571A CN201711068561.5A CN201711068561A CN109749571A CN 109749571 A CN109749571 A CN 109749571A CN 201711068561 A CN201711068561 A CN 201711068561A CN 109749571 A CN109749571 A CN 109749571A
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Abstract
The invention discloses a kind of preparation methods of erosion shield, its key points of the technical solution are that the following steps are included: S1: aniline being added in ionized water, ultrasonic dissolution is carried out, forms the homogeneous phase solution A of white；S2: carboxymethyl chitosan is added in 10-20 parts of distilled water, obtains solution B;S3: solution A is mixed with solution B and ultrasound, is placed in cooling in ice bath, ammonium persulfate is added thereto, is reacted in ice bath environment, obtains polyaniline precipitating；S4: filtering precipitating is successively washed with distilled water, dehydrated alcohol and ether, dry powder C；S5: powder C is mixed with water-base epoxy paint, obtains coating D；S6: matrix polishing is then coated with coating D, has reached the polyaniline for obtaining and having good aqueous solubility, and polyaniline is added into water soluble paint, obtained etch-proof coating, and reduce the discharge of VOC exhaust gas, have the effect of Environmental Safety.
Description
Technical field
The present invention relates to anti-corrosion of metal erosion resisting coating preparation field, in particular to the preparation method of a kind of erosion shield and its
Application in metal pipe material field.
Background technique
Metal material by surrounding medium effect and damage, referred to as metal erosion (MetallicCorrosion), corrode
When, chemistry or electrochemistry heterogeneous reaction have occurred on the interface of metal, metal is made to be transferred to oxidation (ion) state.This can be significant
The mechanical properties such as intensity, plasticity, the toughness of metal material are reduced, the geometry of metal component is destroyed, increase the mill between part
Damage deteriorates the physical properties such as electrical and optical, shortens the service life of equipment, or even cause the catastrophic failures such as fire, explosion；
Corrosion of metal phenomenon is very universal.As ironwork gets rusty (Fe2O3·xH2O), there is hickie (Al in aluminum products surface2O3), copper
Product surface generates verdigris [Cu2(OH)2CO3], silverware surface stain (Ag2S,Ag2) etc. O metal erosion is belonged to, wherein dosage is most
The corrosion of big metal --- steel is most commonly seen.
In current technique, relatively common is to add the coat of metal or organic coating in metal surface, and current
The coating that organic coating uses all is much oil-based solvent, and the use of these solvents, which will lead to, has distributed a large amount of VOC in air
Gas, to affect the health of ambient enviroment and the person itself.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of erosion shield, plays and obtain nano-scale and have good
Water-soluble polyaniline, and polyaniline is added into water soluble paint, the two merges into each other, and on the matrix for needing to coat
Coating, this, using the discharge that can reduce VOC exhaust gas, is the new coating of Environmental Safety.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of preparation of erosion shield
Method includes following steps:
S1: 0.1-2 parts of aniline are added in 5-20 parts of deionized waters, carry out ultrasonic dissolution, and the equal of white is formed after 5-7 minutes
Phase solution A；
S2: 5 parts of carboxymethyl chitosans being added in 10-20 parts of distilled water, are poured into above-mentioned aniline solution after being completely dissolved, molten
Liquid becomes transparent faint yellow, acquisition solution B at once；
S3: solution A is mixed simultaneously ultrasound 5-8 minutes with solution B, then places it in and is cooled to 0-5 DEG C in ice bath, by 3-7 parts
Ammonium persulfate solution be added in above-mentioned system, rock be uniformly mixed and under conditions of ice bath stand reaction 12-18h, obtain
The polyaniline precipitating adulterated to blackish green CM-CTS；
S4: filtering is successively washed three times with distilled water, dehydrated alcohol and ether, obtains powder C after being dried in vacuo 12h；
S5: powder C carries out mixing first physical agitation 2-3h with water-base epoxy paint, then ultrasonic wave disperses 1-2h, during which ceaselessly changes
Water avoids water temperature over-high, is then ground with cone mill, so that polyaniline is uniformly distributed in water-base epoxy coating and obtains
Coating D；
S6: it carries out polishing coating surface step by step with 400,600,800,1200# silicon carbide paper first, is then coated with coating D, apply
Layer is with a thickness of 30-50 μm.
Preferably, the mass ratio of aniline monomer and carboxymethyl chitosan (CM-CTS) are 0.2.
Preferably, the concentration of ammonium persulfate is 0.4mol/L.
Preferably, coating layer thickness is 45 μm.
Through the above technical solutions, having selected the carboxymethyl chitosan with certain corrosion inhibition as dopant acid, pass through
The ratio for adjusting aniline monomer and dopant acid, obtains having nano-scale and has the polyaniline of good aqueous solubility, and by polyaniline
It is added into water soluble paint, the two merges into each other, and coats on needing the body coated, the use of this water soluble paint
The discharge that VOC exhaust gas can be reduced is the new coating of Environmental Safety.
The object of the invention two: a kind of preparation method of erosion shield as described in claim 1 is in metal pipe material field
Using.
The purpose of the present invention three: a kind of metal pipe material, it is characterised in that: including passing through anti-corrosion as described in claim 1
The erosion shield that the preparation method of erosion resisting coating is fabricated to.
Preferably, the inner wall and/or outer wall of tubing is arranged in anti-corrosion layer.
Preferably, metal pipe material is mild steel.
Through the above technical solutions, coating this kind of coating on the lateral wall and inner sidewall of metal pipe material, gold can be reduced
Belong to tubing in the natural environment there is a situation where corroding, promotes the service life of metal pipe material.
In conclusion the invention has the following advantages:
1, the interaction strong due to the strong rigidity and interchain of polyaniline chain, keeps its dissolubility very poor, is insoluble in any solvent
In, which limits its extensive uses technically, and in the present invention by the organic acid of the macromolecular chain of hydrophilic radical into
Row doping, it is available that there is water-soluble polyaniline；
2, the selection of carboxymethyl chitosan itself is additionally contemplates that its own has certain corrosion inhibition relative to other organic acids,
And pass through the cooperation of carboxymethyl chitosan and aniline, further improve the corrosion resistance of polyaniline itself.
Specific embodiment
Invention is further described in detail below.
Article used in the present invention and equipment situation are as follows:
Aniline Beijing Chemical Plant；
Ammonium persulfate Beijing Chemical Plant；
Ultrasonic cleaner KQ100B Kunshan Ultrasonic Instruments Co., Ltd.；
High honour instrument manufacturing Co., Ltd, magnetic stirring apparatus HJ -4A Community of Jin Tan County city；Electronic balance SCA210 plum Teller support benefit
Multi weighing system Co., Ltd；Remaining medical procurement is from market.
Embodiment 1: a kind of preparation method of erosion shield, includes following steps:
S1: 2 parts of aniline are added in 20 parts of deionized waters, carry out ultrasonic dissolution, and the homogeneous phase solution A of white is formed after 7 minutes；
S2: 5 parts of carboxymethyl chitosans are added in 20 parts of distilled water, are poured into after being completely dissolved in above-mentioned aniline solution, solution
Become transparent faint yellow, acquisition solution B at once；
S3: solution A is mixed to simultaneously ultrasound 8 minutes with solution B, then places it in ice bath and is cooled to 5 DEG C, by 7 parts of concentration
It is added in above-mentioned system for the ammonium persulfate solution of 0.4mol/L, rocks and be uniformly mixed and stand reaction under conditions of ice bath
18h obtains the polyaniline precipitating of blackish green CM-CTS doping；
S4: filtering is successively washed three times with distilled water, dehydrated alcohol and ether, obtains powder C after being dried in vacuo 12h；
S5: powder C carries out mixing first physical agitation 3h with water-base epoxy paint, then ultrasonic wave disperses 2h, during which ceaselessly changes water, keeps away
Exempt from water temperature over-high, then ground with cone mill, so that polyaniline is uniformly distributed in water-base epoxy coating and obtain coating
D；
S6: carry out first with 400,600,800,1200# silicon carbide paper surface that the outer wall of mild steel tubing is needed to coat by
Grade polishing, is then coated with coating D, and coating layer thickness is 50 μm.
Embodiment 2: a kind of preparation method of erosion shield, includes following steps:
S1: 0.1 part of aniline is added in 5 parts of deionized waters, carries out ultrasonic dissolution, forms the homogeneous phase solution of white after five minutes
A；
S2: 5 parts of carboxymethyl chitosans are added in 10 parts of distilled water, are poured into after being completely dissolved in above-mentioned aniline solution, solution
Become transparent faint yellow, acquisition solution B at once；
S3: solution A is mixed to simultaneously ultrasound 5 minutes with solution B, then places it in ice bath and is cooled to 0 DEG C, by 3 parts of concentration
It is added in above-mentioned system for the ammonium persulfate solution of 0.4mol/L, rocks and be uniformly mixed and stand reaction under conditions of ice bath
12h obtains the polyaniline precipitating of blackish green CM-CTS doping；
S4: filtering is successively washed three times with distilled water, dehydrated alcohol and ether, obtains powder C after being dried in vacuo 12h；
S5: powder C carries out mixing first physical agitation 2h with water-base epoxy paint, then ultrasonic wave disperses 1h, during which ceaselessly changes water, keeps away
Exempt from water temperature over-high, then ground with cone mill, so that polyaniline is uniformly distributed in water-base epoxy coating and obtain coating
D。
S6: the table for needing to coat to the inner wall of mild steel tubing with 400,600,800,1200# silicon carbide paper is carried out first
Face is polished step by step, is then coated with coating D, and coating layer thickness is 30 μm.
Embodiment 3: a kind of preparation method of erosion shield, includes following steps:
S1: 1.05 parts of aniline are added in 13 parts of deionized waters, carry out ultrasonic dissolution, and mixing for white is formed after 6 minutes
Liquid A；
S2: 5 parts of carboxymethyl chitosans are added in 15 parts of distilled water, are poured into after being completely dissolved in above-mentioned aniline solution, solution
Become transparent faint yellow, acquisition solution B at once；
S3: solution A is mixed to simultaneously ultrasound 7 minutes with solution B, then places it in ice bath and is cooled to 3 DEG C, by 5 parts of concentration
It is added in above-mentioned system for the ammonium persulfate solution of 0.4mol/L, rocks and be uniformly mixed and stand reaction under conditions of ice bath
15h obtains the polyaniline precipitating of blackish green CM-CTS doping；
S4: filtering is successively washed three times with distilled water, dehydrated alcohol and ether, obtains powder C after being dried in vacuo 12h；
S5: powder C carries out mixing first physical agitation 2.5h with water-base epoxy paint, then ultrasonic wave disperses 1.5h, during which ceaselessly changes
Water avoids water temperature over-high, is then ground with cone mill, so that polyaniline is uniformly distributed in water-base epoxy coating and obtains
Coating D；
S6: it carries out that the inner and outer wall of mild steel tubing is needed to coat with 400,600,800,1200# silicon carbide paper first
Surface is polished step by step, is then coated with coating D, and coating layer thickness is 40 μm.
Embodiment 4: a kind of preparation method of erosion shield, includes following steps:
S1: 1 part of aniline is added in 13 parts of deionized waters, carries out ultrasonic dissolution, and the homogeneous phase solution A of white is formed after 6 minutes；
S2: 5 parts of carboxymethyl chitosans are added in 15 parts of distilled water, are poured into after being completely dissolved in above-mentioned aniline solution, solution
Become transparent faint yellow, acquisition solution B at once；
S3: solution A is mixed to simultaneously ultrasound 7 minutes with solution B, then places it in ice bath and is cooled to 3 DEG C, by 5 parts of concentration
It is added in above-mentioned system for the ammonium persulfate solution of 0.4mol/L, rocks and be uniformly mixed and stand reaction under conditions of ice bath
15h obtains the polyaniline precipitating of blackish green CM-CTS doping；
S4: filtering is successively washed three times with distilled water, dehydrated alcohol and ether, obtains powder C after being dried in vacuo 12h；
S5: powder C carries out mixing first physical agitation 2.5h with water-base epoxy paint, then ultrasonic wave disperses 1.5h, during which ceaselessly changes
Water avoids water temperature over-high, is then ground with cone mill, so that polyaniline is uniformly distributed in water-base epoxy coating and obtains
Coating D；
S6: it carries out that the inner and outer wall of mild steel tubing is needed to coat with 400,600,800,1200# silicon carbide paper first
Surface is polished step by step, is then coated with coating D, and coating layer thickness is 45 μm.
Comparative experiments
Comparative example 1: carboxymethyl chitosan is changed to hydrochloric acid, remaining is same as Example 3；
Comparative example 2: for the aqueous epoxide resin paint for being not added with polyaniline.
Salt fog accelerated test
Neutral salt spray test is a kind of international standard test of specification, is to keep certain humidity in chamber, sprays NaCl
Neutral solution (50 ± 10g/L, PH6.5-7.2) makes salt fog free settling to specimen surface, by the corruption of some cycles observation coating
Erosion state, test are mainly used for evaluating the salt fog resistance ability of coating.
Referring to the artificial aerosol corrosion experiment of international standard ISO9227-90, standard GB/T 1771-79 paint film is resistance to for this experiment
Salt fog measuring method, the measurement of the neutral salt spray performance of GB/T1771-91 paint and varnish.
Experimental facilities uses Qingdao Hai Ding Electrical Appliances Co., Ltd FY-05E type salt spray corrosion test machine.Start salt spray test
Case, suspends after experimental condition to be achieved spraying, and the test piece prepared is put into case on test piece support, continuous spraying fortune is carried out
Turn.
Experimental result
It not obtaining mixing uniform water paint after being mixed with, in comparative example 1, polyaniline therein precipitates, because
This not can be carried out subsequent manufacture coating；
After the coating of comparative example 2 and embodiment 1-4 is coated, by scanning electron microscopic observation, it can be found that comparative example 2
Surface is smooth, and has evenly arranged little particle on embodiment 1-4 floating coat.
After salt spray test accelerated corrosion for 24 hours, observe comparative example 2 and embodiment 1-4 again, the coating of comparative example 2 compared with
Before flat and smooth surface, changes significantly, and coating surface is destroyed, and becomes loose porous；And in embodiment 1-4
Water-base epoxy coating surface after polyaniline-modified is compared with before salt spray test, without significant change.Still it can see surface
There is one layer of particulate matter.
Therefore, it can be seen that the polyaniline of soluble paint not soluble in water originally can be allowed by the method for modifying in embodiment
Water solubility is increased, the uniform each position for being dispersed to water soluble paint can be reached by physical mixed, these are dissolved in water-soluble
Property coating polyurethane can significantly promote the corrosion resistance of coating, while it is this water-soluble organic molten without adding
The VOC gas of agent, the human health that is safe from harm generate, and have very big benefit to human body and environment.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (8)
1. a kind of preparation method of erosion shield, it is characterised in that: include following steps:
S1: 0.1-2 parts of aniline are added in 5-20 parts of deionized waters, carry out ultrasonic dissolution, and the equal of white is formed after 5-7 minutes
Phase solution A；
S2: 5 parts of carboxymethyl chitosans being added in 10-20 parts of distilled water, are poured into above-mentioned aniline solution after being completely dissolved,
Solution becomes transparent faint yellow, acquisition solution B at once;
S3: solution A is mixed simultaneously ultrasound 5-8 minutes with solution B, then places it in and is cooled to 0-5 DEG C in ice bath, by 3-7 parts
Ammonium persulfate solution be added in above-mentioned system, rock be uniformly mixed and under conditions of ice bath stand reaction 12-18h, obtain
The polyaniline precipitating adulterated to blackish green CM-CTS；
S4: filtering is successively washed three times with distilled water, dehydrated alcohol and ether, obtains powder C after being dried in vacuo 12h；
S5: powder C carries out mixing first physical agitation 2-3h with water-base epoxy paint, then ultrasonic wave disperses 1-2h, during which ceaselessly changes
Water avoids water temperature over-high, is then ground with cone mill, so that polyaniline is uniformly distributed in water-base epoxy coating and obtains
Coating D；
S6: being carried out polishing coating surface step by step with 400,600,800,1200# silicon carbide paper first, be then coated with coating D,
Coating layer thickness is 30-50 μm.
2. a kind of preparation method of erosion shield according to claim 1, it is characterised in that: aniline monomer and carboxymethyl
The mass ratio of chitosan (CM-CTS) is 0.2.
3. a kind of preparation method of erosion shield according to claim 1, it is characterised in that: the concentration of ammonium persulfate is
0.4mol/L。
4. a kind of preparation method of erosion shield according to claim 1, it is characterised in that: coating layer thickness is 45 μm.
5. a kind of preparation method of erosion shield as described in claim 1 is in the application in metal pipe material field.
6. a kind of metal pipe material, it is characterised in that: including the preparation method system by erosion shield as described in claim 1
The erosion shield being made.
7. a kind of metal pipe material according to claim 6, it is characterised in that: anti-corrosion layer be arranged in tubing inner wall and/
Or outer wall.
8. a kind of metal pipe material according to claim 7, it is characterised in that: metal pipe material is mild steel.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362918A (en) * | 2008-07-31 | 2009-02-11 | 傅晓平 | Polyaniline metal anticorrosion water-soluble industrial coatings |
| CN102643592A (en) * | 2012-04-16 | 2012-08-22 | 沈阳化工大学 | Preparation method of anticorrosive paint of polyaniline modified mesoporous molecular sieve |
| CN103757917A (en) * | 2014-01-26 | 2014-04-30 | 江汉大学 | Method for preparing chitosan-based composite material with electroactivity |
| CN103980798A (en) * | 2014-05-14 | 2014-08-13 | 天津大学 | Doped-state polyaniline epoxy paint and preparation method thereof |
| CN105949960A (en) * | 2016-06-27 | 2016-09-21 | 郭迎庆 | Preparation method of polyaniline water-based epoxy resin anticorrosive paint |
| CN107083057A (en) * | 2017-04-29 | 2017-08-22 | 成都博美实润科技有限公司 | A kind of preparation method for having electroactive carboxyl chitosan based composites |
-
2017
- 2017-11-02 CN CN201711068561.5A patent/CN109749571A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362918A (en) * | 2008-07-31 | 2009-02-11 | 傅晓平 | Polyaniline metal anticorrosion water-soluble industrial coatings |
| CN102643592A (en) * | 2012-04-16 | 2012-08-22 | 沈阳化工大学 | Preparation method of anticorrosive paint of polyaniline modified mesoporous molecular sieve |
| CN103757917A (en) * | 2014-01-26 | 2014-04-30 | 江汉大学 | Method for preparing chitosan-based composite material with electroactivity |
| CN103980798A (en) * | 2014-05-14 | 2014-08-13 | 天津大学 | Doped-state polyaniline epoxy paint and preparation method thereof |
| CN105949960A (en) * | 2016-06-27 | 2016-09-21 | 郭迎庆 | Preparation method of polyaniline water-based epoxy resin anticorrosive paint |
| CN107083057A (en) * | 2017-04-29 | 2017-08-22 | 成都博美实润科技有限公司 | A kind of preparation method for having electroactive carboxyl chitosan based composites |
Non-Patent Citations (1)
| Title |
|---|
| 邓俊英等: "羧甲基壳聚糖掺杂聚苯胺的制备及其在盐酸溶液中对碳钢的缓蚀性能研究", 《高分子学报》 * |
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Application publication date: 20190514 |