CN110003784A - A kind of anticorrosive coating of aluminum alloy materials and preparation method thereof and anti-corrosion method - Google Patents
A kind of anticorrosive coating of aluminum alloy materials and preparation method thereof and anti-corrosion method Download PDFInfo
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- 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
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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
Abstract
The invention discloses anticorrosive coating of a kind of aluminum alloy materials and preparation method thereof and anti-corrosion methods, wherein, which includes silane coupling agent, sodium carboxymethylcellulose, nano silica, soluble polyurethane, polyacrylamide, water and the ionic liquid containing sulfydryl.The anticorrosive coating of aluminum alloy materials provided by the invention has many advantages, such as that stability is good, anti-corrosion capability is strong and the anticorrosive coating strong and of the invention with aluminum alloy surface adhesive force is water paint, environmentally protective, free from environmental pollution.
Description
Application for a patent for invention (entitled a kind of anticorrosion painting of aluminum alloy materials that the application is applicant Wang Yihui
Material and preparation method thereof and anti-corrosion method, application No. is 201710367136X, applying date 2017.5.23) division Shen
Please.
Technical field
The present invention relates to a kind of anticorrosive metal paint and anti-corrosion methods, specifically, being related to a kind of aluminum alloy materials
Anticorrosive coating and preparation method thereof and aluminum alloy materials anti-corrosion method.
Background technique
Aluminium alloy has many advantages, such as that density is small, intensity is high, easy processing formability is good, thus is widely used.According to statistics, closely
Nian Lai, aluminium closes the annual growth of aluminium alloy dosage in the world and is up to 20% or more, and has the tendency that sustainable growth.However
Different degrees of corrosion can occur for aluminium alloy use in various environment, especially in wet environment, seawater, acid or alkali environment
In, the performance of aluminium alloy is on the one hand influenced, leads to security risk, on the other hand also results in a large amount of wastes.Therefore aluminium alloy produces
Product after finalization of the manufacture, generally require to realize anticorrosion to its surface coating paint.Researcher in this field is also to being used for
The anticorrosive coating of aluminium alloy protection has carried out the research of wide hair.
But the existing anticorrosive coating for aluminum alloy materials is there is also many problems, and first, anticorrosive coating
It is not high with aluminum alloy materials binding force, it be easy to cause and falls off, cause to lose corrosion-resisting function；Second, existing anticorrosive coating
Corrosion Protection is not high and stability is poor, can not long-term storage；Third largely uses organic solvent in existing coating, at
This is higher, while can cause damages to environment, human health, and preparation process and use process can also generate a large amount of three wastes.
Summary of the invention
In view of existing anticorrosive coating, there is also the above problems, propose the present invention, provide a kind of preventing for aluminum alloy materials
The anti-corrosion method of etching ground and preparation method thereof and aluminum alloy materials.
In order to achieve the object of the present invention, in a first aspect, the present invention provides a kind of anticorrosive coating of aluminum alloy materials,
In, which includes silane coupling agent, sodium carboxymethylcellulose, nano silica, soluble polyurethane, polypropylene
Amide, water and the ionic liquid containing sulfydryl.
In the case of in the present invention, it is preferred to, relative to the ionic liquid containing sulfydryl of 1 parts by weight, silane coupling agent
Dosage is 0.3~0.8 parts by weight, and the dosage of sodium carboxymethylcellulose is 0.5~1 parts by weight, and the dosage of nano silica is
0.5~1 parts by weight, the dosage of soluble polyurethane are 2~5 parts by weight, and the dosage of polyacrylamide is 1~2 parts by weight, water
Dosage is 20~50 parts by weight.
In further preferred situation, relative to the ionic liquid containing sulfydryl of 1 parts by weight, the dosage of silane coupling agent is
0.3~0.5 parts by weight, the dosage of sodium carboxymethylcellulose are 0.5~0.8 parts by weight, the dosage of nano silica is 0.5~
1 parts by weight, the dosage of soluble polyurethane are 3~5 parts by weight, and the dosage of polyacrylamide is 1~1.5 parts by weight, the use of water
Amount is 25~50 parts by weight；
In more preferable situation, relative to the ionic liquid containing sulfydryl of 1 parts by weight, the dosage of silane coupling agent is 0.4
Parts by weight, the dosage of sodium carboxymethylcellulose are 0.8 parts by weight, and the dosage of nano silica is 1 parts by weight, water-soluble poly ammonia
The dosage of ester is 4 parts by weight, and the dosage of polyacrylamide is 1.2 parts by weight, and the dosage of water is 45 parts by weight.
In the present invention, inventor's discovery can reinforce coating to the knot of aluminum alloy materials with the ionic liquid of sulfydryl
Close, and can also play the role of homogenizing coating so that coating uniform and smooth, under preferable case, it is described containing sulfydryl from
Sub- liquid is 1- methyl -3- (mercaptoethyl) tetrafluoroborate or 1- methyl -3- (mercaptopropyi) tetrafluoroborate.
In the present invention, the silane coupling agent is such as described silane coupled it is also preferred that have the silane coupling agent of sulfydryl
Agent is γ-Mercaptopropyltriethoxysilane or γ mercaptopropyitrimethoxy silane.
The present invention also provides a kind of methods of anticorrosive coating for preparing above-mentioned aluminum alloy materials, wherein including first by silicon
Alkane coupling agent, sodium carboxymethylcellulose, nano silica, soluble polyurethane, polyacrylamide and containing sulfydryl from
Sub- liquid is uniformly mixed and obtains the anticorrosive coating of aluminum alloy materials.In the present invention, mixed mode can use this field
Conventional use of method, such as mechanical stirring, mixing speed can be 500~1000 turns/min.
The invention also includes a kind of aluminum alloy materials method of inhibiting corrosion, this method include first by above-mentioned anticorrosive coating or
The anticorrosive coating of above method preparation is coated in the surface of aluminum alloy materials, and then high temperature is dried.
In the present invention under preferable case, the condition of high temperature drying includes: 90~110 DEG C of temperature, and drying time is 6~8
Hour；Anticorrosive coating is 0.1~1 micron in the coating layer thickness that aluminum alloy material surface is formed after high temperature drying.
In the present invention, raw material of the invention by prior art preparation or can be commercially available.Such as it is described water-soluble
Property polyurethane can be polymerize to obtain by conventional multicomponent isocyanate class monomer and polyhydroxy-alcohol, as commercially available product, such as
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 anticorrosive coating of aluminum alloy materials provided by the invention has the advantage that
1) of the invention strong for anticorrosive coating and aluminum alloy surface adhesive force, can closely with aluminium alloy table
Face paste is closed, and will not fall off, Corrosion Protection is more preferable.
2) anticorrosive coating stability of the invention is good, and preservation 6 months or more still with good performance.
3) anticorrosive coating of the invention is environmentally protective, free from environmental pollution.
Specific embodiment
Present invention will be further explained below with reference to specific examples.But these embodiments be only limitted to illustrate the present invention without
It is to be further limited to protection scope of the present invention.
Preparation example 1
Under nitrogen protection, in dry three-necked flask, 41g N- methylimidazole and 100ml acetonitrile is added, is warming up to 60 DEG C,
The 2- bromine ethyl mercaptan of 84g is added dropwise, insulated and stirred is reacted 14 hours, is monitored end of reaction, is concentrated under reduced pressure to give faint yellow viscous fluid
Then three times with acetone washing body is concentrated under reduced pressure and is dried to obtain bromination 1- methyl -3- (mercaptoethyl) imidazoles；By bromination 1-
(mercaptoethyl) -3- methylimidazole, 60g sodium fluoborate and 50ml acetone are added into another three-necked flask, are warming up to 50 DEG C,
It keeps temperature to be stirred to react 12 hours, filters, filtrate decompression is concentrated to get 1- methyl -3- (mercaptoethyl) tetrafluoroborate
Crude product is dissolved in methylene chloride by crude product, and filtering, filtrate decompression is concentrated to get weak yellow liquid 1- methyl -3- (mercaptoethyl) miaow
Azoles tetrafluoroborate 96.8g, yield 84.2%.1HNMR(400MHz,D2O, DSS external standard), δ 8.72 (s, 1H)；7.45(s,1H)；
7.37(s,1H)；4.25~4.31 (t, 2H)；3.82(s,3H)；2.88~2.92 (t, 2H).
Preparation example 2
Under nitrogen protection, in dry three-necked flask, 41g N- methylimidazole and 100ml acetonitrile is added, is warming up to 60 DEG C,
The 3- bromine propanethiol of 85g is added dropwise, insulated and stirred is reacted 18 hours, is monitored end of reaction, is concentrated under reduced pressure to give faint yellow viscous fluid
Then three times with acetone washing body is concentrated under reduced pressure to give bromination 1- methyl -3- (mercaptoethyl) imidazoles；By bromination 1- (sulfydryl second
Base) -3- methylimidazole, 60g sodium fluoborate and 50ml acetone is added into another three-necked flask, is warming up to 50 DEG C, keep temperature
Degree is stirred to react 12 hours, is filtered, and filtrate decompression is concentrated to get 1- methyl -3- (mercaptoethyl) tetrafluoroborate crude product,
Crude product is dissolved in methylene chloride, is filtered, filtrate decompression is concentrated to get weak yellow liquid 1- methyl -3- (mercaptopropyi) imidazoles tetrafluoro
Borate 99.7g, yield 81.7%.1HNMR(400MHz,D2O, DSS external standard), δ 8.74 (s, 1H)；7.45(s,1H)；7.35
(s,1H)；4.21~4.28 (t, 2H)；3.80(s,3H)；2.67~2.73 (t, 2H)；2.38~2.44 (m, 2H).
Embodiment 1
By 0.4Kg silane coupling agent, 0.8Kg sodium carboxymethylcellulose, 1Kg nano silica, 4Kg water-soluble poly ammonia
Ester, 1.2Kg polyacrylamide and 1Kg contain ionic liquid (1- methyl -3- (mercaptoethyl) imidazoles tetrafluoro boric acid of sulfydryl
Salt) it is added in 45Kg water, 1000 turns/min mechanical stirring is uniformly mixed and obtains the anticorrosive coating A1 of aluminum alloy materials.
Embodiment 2
By 0.3Kg silane coupling agent, 0.6Kg sodium carboxymethylcellulose, 1Kg nano silica, 3Kg water-soluble poly ammonia
Ester, 1Kg polyacrylamide and 1Kg contain the ionic liquid (1- methyl -3- (mercaptoethyl) tetrafluoroborate) of sulfydryl
It is added in 50Kg water, 1000 turns/min mechanical stirring is uniformly mixed and obtains the anticorrosive coating A2 of aluminum alloy materials.
Embodiment 3
By 0.5Kg silane coupling agent, 0.5Kg sodium carboxymethylcellulose, 0.5Kg nano silica, 5Kg water-soluble poly ammonia
Ester, 1.5Kg polyacrylamide and 1Kg contain ionic liquid (1- methyl -3- (mercaptopropyi) imidazoles tetrafluoro boric acid of sulfydryl
Salt) it is added in 25Kg water, 1000 turns/min mechanical stirring is uniformly mixed and obtains the anticorrosive coating A3 of aluminum alloy materials.
Embodiment 4
By 0.6Kg silane coupling agent, 0.5Kg sodium carboxymethylcellulose, 0.5Kg nano silica, 2Kg water-soluble poly ammonia
Ester, 1Kg polyacrylamide and 0.5Kg contain ionic liquid (1- methyl -3- (mercaptoethyl) imidazoles tetrafluoro boric acid of sulfydryl
Salt) it is added in 45Kg water, 1000 turns/min mechanical stirring is uniformly mixed and obtains the anticorrosive coating A4 of aluminum alloy materials.
Embodiment 5
By 0.4Kg silane coupling agent, 0.8Kg sodium carboxymethylcellulose, 1Kg nano silica, 4Kg water-soluble poly ammonia
Ester, 1.2Kg polyacrylamide and 0.2Kg contain ionic liquid (1- methyl -3- (mercaptoethyl) imidazoles tetrafluoro boric acid of sulfydryl
Salt) it is added in 45Kg water, 1000 turns/min mechanical stirring is uniformly mixed and obtains the anticorrosive coating A5 of aluminum alloy materials.
Embodiment 6
By 0.4Kg silane coupling agent, 0.2Kg sodium carboxymethylcellulose, 1Kg nano silica, 4Kg water-soluble poly ammonia
Ester, 1.2Kg polyacrylamide and 0.2Kg contain ionic liquid (1- methyl -3- (mercaptoethyl) imidazoles tetrafluoro boric acid of sulfydryl
Salt) it is added in 45Kg water, 1000 turns/min mechanical stirring is uniformly mixed and obtains the anticorrosive coating A6 of aluminum alloy materials.
Embodiment 7
By 0.4Kg silane coupling agent, 0.8Kg sodium carboxymethylcellulose, 1Kg nano silica, 4Kg water-soluble poly ammonia
The ionic liquid (bromination 1- methyl -3- (mercaptoethyl) imidazole salts) that ester, 1.2Kg polyacrylamide and 1Kg contain sulfydryl adds
Enter in 45Kg water, 1000 turns/min mechanical stirring is uniformly mixed and obtains the anticorrosive coating A7 of aluminum alloy materials.
Comparative example 1
By 0.4Kg silane coupling agent, 0.8Kg sodium carboxymethylcellulose, 1Kg nano silica, 4Kg water-soluble poly ammonia
Ester, 1.2Kg polyacrylamide are added in 45Kg water, and 1000 turns/min mechanical stirring is uniformly mixed and obtains the anti-corrosion of aluminum alloy materials
Lose coating D1.
Comparative example 2
By 0.4Kg silane coupling agent, 0.8Kg sodium carboxymethylcellulose, 1Kg nano silica, 4Kg water-soluble poly ammonia
Ester, 1.2Kg polyacrylamide and 1Kg ionic liquid (1- methyl -3- ethyl imidazol(e) tetrafluoroborate) are added in 45Kg water,
1000 turns/min mechanical stirring is uniformly mixed and obtains the anticorrosive coating D2 of aluminum alloy materials.
Comparative example 3
By 0.4Kg silane coupling agent, 1Kg nano silica, 4Kg soluble polyurethane, 1.2Kg polyacrylamide and
The ionic liquid (1- methyl -3- (mercaptoethyl) tetrafluoroborate) that 1Kg contains sulfydryl is added in 45Kg water, 1000 turns/
Min mechanical stirring is uniformly mixed and obtains the anticorrosive coating D3 of aluminum alloy materials.
Test case 1
By in embodiment 1-7 and comparative example 1-3 method prepare coating after preparation the same day (0 day), prepare be sealed
60th day, preparation is sealed the 120th day and preparation is sealed the 180th day, brush in aluminium alloy test block respectively, 110 DEG C of bakings
Solidization, measuring and forming coating layer thickness is 0.8 micron, and the measurement of rust surface product is then carried out after 200h salt spray test.Tool
The results are shown in Table 1 for body.Test block (is purchased from the limited public affairs of Jiangsu Yang Dong Aluminum using 6061 aluminium alloys of 200mm*30mm*3mm size
Department)
Table 1
Salt spray test is carried out with reference to the method for GB/T1771-2007, as can be seen from the above table, anticorrosion provided by the invention
Coating has good stability, and preservation 6 months used above still with good performance, generates good guarantor to aluminium alloy
Shield effect.
Test case 2
Obtained coating in embodiment 1-7 and comparative example 1-3 is brushed respectively on aluminium alloy test block M1-M10,110
DEG C baking and curing, measuring and forming coating layer thickness is 0.8 micron, and the M1-M10 aluminium alloy test block after coating is tested, and is tried
Block uses 6061 aluminium alloys (being purchased from Jiangsu Yang Dong Aluminum Co., Ltd) of 200mm*30mm*3mm size.Specific test method and
The results are shown in Table 2:
Table 2
Wherein, wherein adhesive force is tested according to GB/T5210-2006；Salt spray resistance is carried out according to GB/T1771-2007
Test；Acid resistance, alkali resistance are tested according to GB/T9274-1988, and acid resistance is in 5%H2SO4, carry out under the conditions of 25 DEG C；
Alkali resistance is carried out under the conditions of 25 DEG C in 3%NaOH；Salt tolerant outlet capacity is tested according to GB/T1763-1989.
In conclusion a kind of anticorrosion for the aluminum alloy materials that the present invention provides stability is good, anti-corrosion capability is strong applies
Material, which can be strong with aluminum alloy surface adhesive force, can closely be bonded with aluminum alloy surface, and this
The anticorrosive coating of invention is water paint, environmentally protective, free from environmental pollution.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (8)
1. a kind of anticorrosive coating of aluminum alloy materials, which is characterized in that the anticorrosive coating includes silane coupling agent, carboxymethyl
Sodium cellulosate, nano silica, soluble polyurethane, polyacrylamide, water and the ionic liquid containing sulfydryl.
2. anticorrosive coating as described in claim 1, which is characterized in that the ionic liquid containing sulfydryl relative to 1 parts by weight
Body, the dosage of silane coupling agent are 0.3~0.5 parts by weight, and the dosage of sodium carboxymethylcellulose is 0.5~0.8 parts by weight, nanometer
The dosage of silica is 0.5~1 parts by weight, the dosage of soluble polyurethane is 3~5 parts by weight, the dosage of polyacrylamide
For 1~1.5 parts by weight, the dosage of water is 25~50 parts by weight.
3. anticorrosive coating as claimed in claim 2, which is characterized in that the ionic liquid containing sulfydryl relative to 1 parts by weight
Body, the dosage of silane coupling agent are 0.4 parts by weight, and the dosage of sodium carboxymethylcellulose is 0.8 parts by weight, nano silica
Dosage is 1 parts by weight, the dosage of soluble polyurethane is 4 parts by weight, and the dosage of polyacrylamide is 1.2 parts by weight, the use of water
Amount is 45 parts by weight.
4. anticorrosive coating as claimed in claim 1 or 2, which is characterized in that the ionic liquid containing sulfydryl can be with
For 1- methyl -3- (mercaptoethyl) tetrafluoroborate or 1- methyl -3- (mercaptopropyi) tetrafluoroborate.
5. anticorrosive coating as claimed in claim 1 or 2, which is characterized in that in anticorrosive coating, the silane coupling agent
For γ-Mercaptopropyltriethoxysilane or γ mercaptopropyitrimethoxy silane.
6. a kind of method for preparing anticorrosive coating described in claim 1-5 any one, which is characterized in that including by silane
Coupling agent, sodium carboxymethylcellulose, nano silica, soluble polyurethane, polyacrylamide and the ion containing sulfydryl
Liquid is added to the water, and is uniformly mixed and obtains the anticorrosive coating of aluminum alloy materials.
7. a kind of aluminum alloy materials method of inhibiting corrosion, which is characterized in that this method includes first by claim 1-5 any one
The anticorrosive coating is coated in the surface of aluminum alloy materials, and then high temperature is dried.
8. method of claim 7, which is characterized in that the condition of high temperature drying includes: 90~110 DEG C of temperature, when drying
Between be 6~8 hours；Coating is 0.1~1 micron in the coating layer thickness that aluminum alloy material surface is formed after high temperature drying.
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| CN108165965B (en) * | 2017-12-27 | 2019-11-26 | 温岭市合丰鞋材有限公司 | A kind of preparation method of magnesium alloy anticorrosion composite membrane |
| CN108184693A (en) * | 2018-01-30 | 2018-06-22 | 东兰县广元养殖专业合作社 | A kind of etch-proof rabbit-hutch |
| CN109535970A (en) * | 2018-11-21 | 2019-03-29 | 天津市杰利凯科技有限公司 | A kind of metal surface anticorrosive passivator |
| CN114204134B (en) * | 2021-11-18 | 2024-01-02 | 淄博火炬能源有限责任公司 | Power lead-acid storage battery pole group and manufacturing method thereof |
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| CN110003784B (en) | 2020-12-25 |
| CN107057548B (en) | 2019-07-26 |
| CN107057548A (en) | 2017-08-18 |
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