CN107151518A - It is a kind of for water paint of corrosive protection of aluminium alloy and its preparation method and application - Google Patents
It is a kind of for water paint of corrosive protection of aluminium alloy and its preparation method and application Download PDFInfo
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- CN107151518A CN107151518A CN201710367358.1A CN201710367358A CN107151518A CN 107151518 A CN107151518 A CN 107151518A CN 201710367358 A CN201710367358 A CN 201710367358A CN 107151518 A CN107151518 A CN 107151518A
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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
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
- C09D171/02—Polyalkylene oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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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
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
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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
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- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of for water paint of corrosive protection of aluminium alloy and its preparation method and application, characterized in that, the water paint main component includes polyethylene glycol, silane coupler, nano silicon, water-solubility rare-earth metal salt, soluble polyurethane, polyacrylamide and water.The environmental protection, free from environmental pollution for water paint of the present invention; and with very excellent stability; the attachment of strength can be formed with aluminum alloy surface using the water paint; closely fitted with aluminum alloy surface; the coating of formation is smooth, will not fall off; with good Corrosion Protection, good protection is formed to aluminium alloy.
Description
Technical field
The present invention relates to a kind of metal anti-corrosive paint, specifically, it is related to a kind of water paint for corrosive protection of aluminium alloy
And its preparation method and application.
Background technology
Aluminium alloy has the advantages that density is small, intensity is high, easy processing formability is good, is widely used in national economy and national defence
Every field is built, such as building, Aero-Space, automobile, ship.But aluminium alloy use in various environment can occur not
With the corrosion of degree, the performance of aluminium alloy is on the one hand influenceed, causes potential safety hazard, on the other hand also result in a large amount of wastes.Cause
This aluminum alloy plate materials sheet material after finalization of the manufacture, generally requires to carry out preservative treatment to its surface, preservative treatment is typically employed in
Its surface coating paint is realized.Research for the coating of corrosive protection of aluminium alloy causes the concern and again of this area scientific research personnel
Depending on.
It is first, a large amount of using having in coating but the existing coating for corrosive protection of aluminium alloy is the problem of also have many
Machine solvent, cost is higher, while can be caused harm to environment, health, preparation process and can also be produced using process a large amount of
The three wastes；Secondly, the existing corrosion resistance of coating for corrosive protection of aluminium alloy can be still not high, limits its application, on the one hand
Paint stability is poor, and another aspect coating is not high with aluminum alloy materials adhesion, easily causes and comes off.
In view of the generality that aluminium alloy is applied in every field, this area is needed the more excellent anti-corrosion of exploitation performance badly and applied
Material.
The content of the invention
It is an object of the invention to overcome the drawbacks described above of existing corrosive protection of aluminium alloy coating there is provided one kind to be used for aluminium alloy
Preserved aqueous coating and its preparation method and application, this is used for the water paint environmental protection and economy of corrosive protection of aluminium alloy, and more
It is stable, combined with alloy matrix aluminum more firm.
In order to realize the purpose of the present invention, in a first aspect, the present invention provides a kind of water paint for corrosive protection of aluminium alloy,
Wherein, the water paint main component include polyethylene glycol, silane coupler, nano silicon, water-solubility rare-earth metal salt,
Soluble polyurethane, polyacrylamide and water.
In accordance with the present invention it is preferred that, in water paint, relative to the soluble polyurethane of 1 parts by weight, polyethylene glycol
Consumption is 2~5 parts by weight, and the consumption of silane coupler is 0.2~0.5 parts by weight, and the consumption of nano silicon is 0.5~1
Parts by weight, the consumption of water-solubility rare-earth metal salt are 0.3~0.6 parts by weight, and the consumption of polyacrylamide is 0.5~1 parts by weight,
The consumption of water is 15~40 parts by weight.
According to the present invention, in water paint, silane coupler preferably carries the silane coupler of sulfydryl, such as described silicon
Alkane coupling agent is γ-Mercaptopropyltriethoxysilane or γ mercaptopropyi trimethoxy silanes.
In accordance with the present invention it is preferred that, in water paint, the water-solubility rare-earth metal salt is lanthanum nitrate or neodymium nitrate.
The addition of lanthanum nitrate or neodymium nitrate causes the paint stability formed to have very big raising, especially, also substantially increase
For the adhesive force of aluminum alloy materials.
In accordance with the present invention it is preferred that, the mean molecule quantity of the polyethylene glycol is 1000~1200, nano silicon
Average grain diameter is 30~50nm.
Second aspect, the present invention provides a kind of preparation method of the above-mentioned water paint for corrosive protection of aluminium alloy, wherein, should
Preparation method comprises the following steps：First by silane coupler, water-solubility rare-earth metal salt is soluble in water is uniformly mixed, then
Polyethylene glycol, nano silicon, soluble polyurethane, polyacrylamide are added above-mentioned mixed liquor and be uniformly mixed, is obtained
To the water paint for corrosive protection of aluminium alloy.
In the present invention, the mode of stirring mixing can use method commonly used in the art, and such as mechanical agitation is stirred
It can be 500~800 turns/min to mix speed.
In the present invention, raw material of the invention can be prepared or be commercially available by prior art.For example it is described water-soluble
Property polyurethane can be polymerize by conventional multicomponent isocyanate class monomer and polyhydroxy-alcohol, as commercially available product, for example
PU-100, PU-200, PU-300, PU-400, PU-500 type waterborne polyurethane resin of Tianzhang City's Xingtai Fine Chemical Works disperse
Body (solid content 30~40%).
The third aspect, the present invention also provides prepared by a kind of above-mentioned water paint or the above method for corrosive protection of aluminium alloy
Application of the water paint in corrosive protection of aluminium alloy for corrosive protection of aluminium alloy, wherein, closed including the use of above-mentioned water paint in aluminium
Gold surface is coated, then in 100~130 DEG C of baking and curings.The drying can be carried out in hot air drier.
According to the present invention, the method for coating is not particularly limited, for example, can be commonly used in the art
Method, including spraying, brushing or impregnating.
It was found by the inventors of the present invention that the coating that coating coating and baking and curing are formed can be achieved more than 0.2 micron
To the preferable anti-corrosion protection of aluminium alloy, basic application can be met.Preferably, coating after coating, baking and curing in aluminium
The coating layer thickness of alloy surface formation is 0.2~1.5 micron.The thickness of coating can be entered by conventional such as XRF
Row is determined.
The water paint for corrosive protection of aluminium alloy of the present invention has advantages below：
1) environmental protection for being used for water paint of the invention, free from environmental pollution, and there is very excellent stability.
2) the of the invention water paint that is used for is strong with aluminum alloy surface adhesive force, can closely with aluminum alloy surface
Laminating, will not fall off, Corrosion Protection is more preferable.
3) coating of the water paint formation of the present invention, smooth, dense uniform, no shrinkage cavity, cissing are coated.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.But these embodiments be only limitted to explanation the present invention without
It is the further restriction to protection scope of the present invention.
Embodiment 1
First by 0.2Kg silane couplers (γ-Mercaptopropyltriethoxysilane or), 0.1Kg water-solubility rare-earth metal salts
(neodymium nitrate) adds (650 turns/min) of mechanical agitation in 30Kg water and is well mixed, then by 3Kg polyethylene glycol, 0.5Kg nanometers two
Silica, 1Kg soluble polyurethanes (in terms of solid content, PU-300 type aqueous polyurethane resin dispersions, solid content 35%),
1Kg polyacrylamides add above-mentioned (800 turns/min) of mixed liquor mechanical agitation and are well mixed, and obtain the water for corrosive protection of aluminium alloy
Property coating A1.
Embodiment 2
First by 0.4Kg silane couplers (γ-Mercaptopropyltriethoxysilane), 0.05Kg water-solubility rare-earth metal salts
(lanthanum nitrate) adds (600 turns/min) of mechanical agitation in 40Kg water and is well mixed, then by 5Kg polyethylene glycol, 0.8Kg nanometers two
Silica, 1Kg soluble polyurethanes (in terms of solid content, PU-300 type aqueous polyurethane resin dispersions, solid content 35%),
0.5Kg polyacrylamides add above-mentioned (1000 turns/min) of mixed liquor mechanical agitation and are well mixed, and obtain being used for corrosive protection of aluminium alloy
Water paint A2.
Embodiment 3
First by 0.5Kg silane couplers (γ mercaptopropyis trimethoxy silane), 0.15Kg water-solubility rare-earth metal salt (nitre
Sour neodymium) add (650 turns/min) of mechanical agitation in 15Kg water and be well mixed, then by 2Kg polyethylene glycol, 0.8Kg nano-silicas
SiClx, 1Kg soluble polyurethanes (in terms of solid content, PU-300 type aqueous polyurethane resin dispersions, solid content 35%),
0.7Kg polyacrylamides add above-mentioned (800 turns/min) of mixed liquor mechanical agitation and are well mixed, and obtain for corrosive protection of aluminium alloy
Water paint A3.
Embodiment 4
First by 0.2Kg silane couplers (γ-Mercaptopropyltriethoxysilane), 0.03Kg water-solubility rare-earth metal salts
(neodymium nitrate) adds (650 turns/min) of mechanical agitation in 30Kg water and is well mixed, then by 3Kg polyethylene glycol, 0.5Kg nanometers two
Silica, 1Kg soluble polyurethanes (in terms of solid content, PU-300 type aqueous polyurethane resin dispersions, solid content 35%),
1Kg polyacrylamides add above-mentioned (800 turns/min) of mixed liquor mechanical agitation and are well mixed, and obtain the water for corrosive protection of aluminium alloy
Property coating A4.
Embodiment 5
First by 0.2Kg silane couplers (γ-Mercaptopropyltriethoxysilane), 0.02Kg water-solubility rare-earth metal salts
(lanthanum nitrate) adds (650 turns/min) of mechanical agitation in 30Kg water and is well mixed, then by 3Kg polyethylene glycol, 0.5Kg nanometers two
Silica, 1Kg soluble polyurethanes (in terms of solid content, PU-300 type aqueous polyurethane resin dispersions, solid content 35%),
1Kg polyacrylamides add above-mentioned (800 turns/min) of mixed liquor mechanical agitation and are well mixed, and obtain the water for corrosive protection of aluminium alloy
Property coating A5.
Embodiment 6
First by 0.2Kg silane couplers (γ-Mercaptopropyltriethoxysilane), 0.1Kg water-solubility rare-earth metal salt (nitre
Sour cerium) add (650 turns/min) of mechanical agitation in 30Kg water and be well mixed, then by 3Kg polyethylene glycol, 0.5Kg nano-silicas
SiClx, 1Kg soluble polyurethanes (in terms of solid content, PU-300 type aqueous polyurethane resin dispersions, solid content 35%), 1Kg
Polyacrylamide adds above-mentioned (800 turns/min) of mixed liquor mechanical agitation and is well mixed, and obtains for the aqueous of corrosive protection of aluminium alloy
Coating A6.
Embodiment 7
First by 0.2Kg silane couplers (cyclohexyl trimethoxy silane), 0.1Kg water-solubility rare-earths metal salt (neodymium nitrate)
(650 turns/min) of mechanical agitation in 30Kg water is added to be well mixed, then by 3Kg polyethylene glycol, 0.5Kg nano silicons,
1Kg soluble polyurethanes (in terms of solid content, PU-300 type aqueous polyurethane resin dispersions, solid content 35%), 1Kg polypropylene
Acid amides adds above-mentioned (800 turns/min) of mixed liquor mechanical agitation and is well mixed, and obtains the water paint A7 for corrosive protection of aluminium alloy.
Comparative example 1
0.2Kg silane couplers (γ-Mercaptopropyltriethoxysilane) are first added into mechanical agitation (650 in 30Kg water
Turn/min) it is well mixed, then by 3Kg polyethylene glycol, 0.5Kg nano silicons, 1Kg soluble polyurethanes (with solid content
Meter, PU-300 type aqueous polyurethane resin dispersions, solid content 35%), 1Kg polyacrylamides add above-mentioned mixed liquor machinery and stir
Mix (800 turns/min) to be well mixed, obtain the water paint D1 for corrosive protection of aluminium alloy.
Comparative example 2
First by 0.2Kg silane couplers (γ-Mercaptopropyltriethoxysilane or), 0.1Kg water-solubility rare-earth metal salts
(neodymium nitrate) adds (650 turns/min) of mechanical agitation in 30Kg water and is well mixed, then by 0.5Kg nano silicons, 1Kg water
Soluble polyurethane (in terms of solid content, PU-300 type aqueous polyurethane resin dispersions, solid content 35%), 1Kg polyacrylamides
Add (800 turns/min) of above-mentioned mixed liquor mechanical agitation to be well mixed, obtain the water paint D2 for corrosive protection of aluminium alloy.
Test case 1
Obtained coating in embodiment 1-7 and comparative example 1-2 is brushed on aluminium alloy test block L1-L9 respectively, 100 DEG C
Baking and curing, it is 0.8 micron to measure and to form coating layer thickness, the L1-L9 aluminium alloy test blocks after coating is tested, test block is adopted
With 6061 aluminium alloys (being purchased from Henan Mingtai Aluminum Industry Co., Ltd.) of 200mm*30mm*3mm sizes.Specific method of testing and
As a result it is as shown in table 1：
Table 1
Wherein, acid resistance is in 5%H2SO4, carry out under the conditions of 25 DEG C；Alkali resistance is in 3%NaOH, under the conditions of 25 DEG C
Carry out.As can be seen from the above table, water paint of the invention can be combined with strong adhesive force with aluminium alloy, the painting of formation
Layer is smooth, and corrosion resistance is greatly improved.
Test case 2
By in embodiment 1-7 and comparative example 1-2 method prepare coating after preparation the same day (0 day), preparation sealing preserve
50th day, preparation sealing preserve the 100th day and preparation sealing preserve carry out 200h salt spray tests on the 150th day, then carry out corrosion
The measurement of area.Concrete outcome is as shown in table 2.
Table 2
As can be seen from the above table, the water paint that provides of the present invention has good stability, preserve 5 months it is used above
Still there is good performance, good protective effect is produced to aluminium alloy.
Claims (9)
1. a kind of water paint for corrosive protection of aluminium alloy, it is characterised in that the water paint main component include polyethylene glycol,
Silane coupler, nano silicon, water-solubility rare-earth metal salt, soluble polyurethane, polyacrylamide and water.
2. water paint as claimed in claim 1, it is characterised in that in water paint, relative to the water solubility of 1 parts by weight
Polyurethane, the consumption of polyethylene glycol is 2~5 parts by weight, and the consumption of silane coupler is 0.2~0.5 parts by weight, nanometer titanium dioxide
The consumption of silicon is that 0.5~1 parts by weight, the consumption of water-solubility rare-earth metal salt are 0.05~0.15 parts by weight, polyacrylamide
Consumption is 0.5~1 parts by weight, and the consumption of water is 15~40 parts by weight.
3. water paint as claimed in claim 1 or 2, it is characterised in that in water paint, the silane coupler is
γ-Mercaptopropyltriethoxysilane or γ mercaptopropyitrimethoxy silane.
4. water paint as claimed in claim 1 or 2, it is characterised in that in water paint, the water-solubility rare-earth metal
Salt is lanthanum nitrate or neodymium nitrate.
5. water paint as claimed in claim 1 or 2, it is characterised in that the mean molecule quantity of the polyethylene glycol is 1000
~1200, the average grain diameter of nano silicon is 30~50nm.
6. the preparation method of the water paint for corrosive protection of aluminium alloy described in claim 1 to 5 any one, its feature exists
In the preparation method comprises the following steps：Silane coupler, water-solubility rare-earth metal salt are first added to the water stirring mixing equal
It is even, polyethylene glycol, nano silicon, soluble polyurethane, polyacrylamide are then added into above-mentioned well mixed liquid
In be uniformly mixed, obtain the water paint for corrosive protection of aluminium alloy.
7. application of the water paint described in claim 1 to 5 any one in corrosive protection of aluminium alloy, it is characterised in that including
Usage right requires that the water paint described in 1 to 4 any one is coated in aluminum alloy surface, then in 100~130 DEG C of bakings
Solidization.
8. application as claimed in claim 7, it is characterised in that the method for the coating includes spraying, brushes or impregnate.
9. application as claimed in claim 7, it is characterised in that coating is formed after coating, baking and curing in aluminum alloy surface
Coating layer thickness be 0.2~1.5 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367358.1A CN107151518A (en) | 2017-05-23 | 2017-05-23 | It is a kind of for water paint of corrosive protection of aluminium alloy and its preparation method and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367358.1A CN107151518A (en) | 2017-05-23 | 2017-05-23 | It is a kind of for water paint of corrosive protection of aluminium alloy and its preparation method and application |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238345A (en) * | 2019-06-11 | 2019-09-17 | 南通大学 | A kind of cast aluminium alloy gold anticorrosive coating and its method for preparing surface recombination film |
| CN110760916A (en) * | 2019-11-18 | 2020-02-07 | 和县科嘉阀门铸造有限公司 | Method for improving corrosion resistance of magnesium alloy valve |
| CN111513487A (en) * | 2020-04-29 | 2020-08-11 | 瑞锦电气(苏州)有限公司 | High-weather-resistance corrosion-resistance meteorological cabinet with waterproof and dustproof functions |
| CN112221909A (en) * | 2020-09-29 | 2021-01-15 | 广东华固工程有限公司 | Treatment method for prolonging service life of foundation pit supporting structure after being in service for long time |
| CN115124565A (en) * | 2022-07-08 | 2022-09-30 | 科顺防水科技股份有限公司 | Method for preparing rare earth silane coupling agent, rare earth silane coupling agent and two-component polyurethane waterproof coating composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238345A (en) * | 2019-06-11 | 2019-09-17 | 南通大学 | A kind of cast aluminium alloy gold anticorrosive coating and its method for preparing surface recombination film |
| CN110760916A (en) * | 2019-11-18 | 2020-02-07 | 和县科嘉阀门铸造有限公司 | Method for improving corrosion resistance of magnesium alloy valve |
| CN110760916B (en) * | 2019-11-18 | 2022-04-05 | 和县科嘉阀门铸造有限公司 | Method for improving corrosion resistance of magnesium alloy valve |
| CN111513487A (en) * | 2020-04-29 | 2020-08-11 | 瑞锦电气(苏州)有限公司 | High-weather-resistance corrosion-resistance meteorological cabinet with waterproof and dustproof functions |
| CN112221909A (en) * | 2020-09-29 | 2021-01-15 | 广东华固工程有限公司 | Treatment method for prolonging service life of foundation pit supporting structure after being in service for long time |
| CN115124565A (en) * | 2022-07-08 | 2022-09-30 | 科顺防水科技股份有限公司 | Method for preparing rare earth silane coupling agent, rare earth silane coupling agent and two-component polyurethane waterproof coating composition |
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Application publication date: 20170912 |