CN115725356A - Marine steel corrosion-resistant paste and preparation method thereof - Google Patents
Marine steel corrosion-resistant paste and preparation method thereof Download PDFInfo
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- CN115725356A CN115725356A CN202211308966.2A CN202211308966A CN115725356A CN 115725356 A CN115725356 A CN 115725356A CN 202211308966 A CN202211308966 A CN 202211308966A CN 115725356 A CN115725356 A CN 115725356A
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- marine steel
- modified alumina
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- 238000005260 corrosion Methods 0.000 title claims abstract description 56
- 230000007797 corrosion Effects 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 40
- 239000010959 steel Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 40
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000292 calcium oxide Substances 0.000 claims abstract description 21
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002199 base oil Substances 0.000 claims abstract description 11
- 239000003112 inhibitor Substances 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 239000003921 oil Substances 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- 125000001931 aliphatic group Chemical group 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- MSRJTTSHWYDFIU-UHFFFAOYSA-N octyltriethoxysilane Chemical compound CCCCCCCC[Si](OCC)(OCC)OCC MSRJTTSHWYDFIU-UHFFFAOYSA-N 0.000 claims description 5
- 229960003493 octyltriethoxysilane Drugs 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 238000010025 steaming Methods 0.000 claims description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- QDCPNGVVOWVKJG-VAWYXSNFSA-N 2-[(e)-dodec-1-enyl]butanedioic acid Chemical compound CCCCCCCCCC\C=C\C(C(O)=O)CC(O)=O QDCPNGVVOWVKJG-VAWYXSNFSA-N 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims 3
- -1 aluminium distearate Chemical compound 0.000 claims 1
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 230000007774 longterm Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 4
- 239000003973 paint Substances 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000000576 coating method Methods 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229940083916 aluminum distearate Drugs 0.000 description 3
- RDIVANOKKPKCTO-UHFFFAOYSA-K aluminum;octadecanoate;hydroxide Chemical compound [OH-].[Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O RDIVANOKKPKCTO-UHFFFAOYSA-K 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Lubricants (AREA)
Abstract
The invention belongs to the technical field of sewage treatment, and particularly relates to an ocean steel corrosion-resistant paste and a preparation method thereof; the paint comprises the following components in parts by weight: 35-45 parts of base oil, 10-14 parts of oily anticorrosive agent, 20-50 parts of modified alumina solution and 0.5-2 parts of calcium oxide; in the technical scheme of the invention, the base oil, the oily corrosion inhibitor, the modified alumina solution and the calcium oxide are contained in the base oil, and the effect of prolonging the long-term strength of the corrosion-resistant paste can be achieved through the synergistic effect of the substances.
Description
Technical Field
The invention relates to the technical field of special corrosion prevention, in particular to an ocean steel corrosion prevention paste and a preparation method thereof.
Background
The ocean is used as a component part with the largest land surface occupation area, a large number of iron-based products such as ships, bridges, wind power towers, oil wells and other facilities need to be exposed to the ocean atmospheric environment, the equipment can be continuously subjected to severe wet sea wind blowing, solarization, rain and seawater erosion, the service life of metal parts is reduced when the metal parts are exposed to humid and saline-alkaline environments, the cost is high, and even severe safety accidents can be caused, and metal oxidation and electrochemical reaction mainly occur on the corrosion of the metal parts;
in the prior art, the corrosion problem of metal is relieved mainly by means of coating anticorrosive paint, plating, spraying and the like, but the protection effect is poor, and the anti-corrosion paste gradually loses the anti-corrosion effect mainly because the anti-corrosion paste falls off due to the strength reduction of the coating formed by the anti-corrosion paste in the marine environment.
Disclosure of Invention
The invention aims to provide an ocean steel anticorrosion paste and a preparation method thereof, and solves the following technical problems:
the corrosion-resistant paste falls off after being used for a long time in the marine environment, so that the corrosion-resistant effect of the corrosion-resistant paste is gradually lost.
The purpose of the invention can be realized by the following technical scheme:
the marine steel corrosion-resistant paste comprises the following components in parts by weight: 35-45 parts of base oil, 10-14 parts of oily anticorrosive agent, 20-50 parts of modified alumina solution and 0.5-2 parts of calcium oxide.
As a further scheme of the invention: the base oil is white oil.
As a further scheme of the invention: the oily anticorrosive agent is one or more of oil calcium sulfonate, dodecenyl succinic acid or aluminum distearate.
As a further scheme of the invention: the modified alumina is prepared by the following steps:
a1. calcining alumina with particle size of 0.1-1.5 μm at 800-1200 deg.C for 8-16h;
a2. placing the calcined alumina powder into a dispersion system consisting of tetrahydrofuran or acetone, adding a silane coupling agent containing an aliphatic chain into the dispersion system, refluxing for 2-4h at 70-80 ℃, cooling, fully mixing uniformly, and cooling to obtain a modified alumina solution.
As a further scheme of the invention: the silane coupling agent containing the aliphatic chain is octyl triethoxysilane.
As a further scheme of the invention: the preparation method of the marine steel corrosion-resistant paste comprises the following steps:
s1, weighing the raw materials in parts by weight, mixing and stirring the base oil, the oily anticorrosive agent and the modified alumina solution uniformly, and then placing the mixture in a reaction kettle to heat for 30-75min to obtain slurry;
s2, blending the reacted slurry and calcium oxide in a carbon dioxide-free atmosphere, gradually adding calcium oxide powder, continuously stirring and maintaining the temperature to be not higher than 60 ℃, steaming at a low temperature to remove water in a mixed system after the reaction is finished, and uniformly stirring again to obtain the marine steel corrosion-resistant paste.
As a further scheme of the invention: the heating temperature in the step S1 is 70-90 ℃.
The invention has the beneficial effects that:
(1) In the technical scheme of the invention, the base oil, the oily corrosion inhibitor, the modified alumina solution and the calcium oxide are contained in the base oil, and the effect of prolonging the long-term strength of the corrosion-resistant paste can be achieved through the synergistic effect of the substances.
(2) The anti-corrosion paste adopted by the invention adopts the silane coupling agent containing the aliphatic chain in the process of preparing the modified alumina, so that the full mixing of the modified alumina and the anti-corrosion paste system can be effectively improved, and particularly, the oily anti-corrosion paste material can be well combined with the modified alumina, thereby improving the comprehensive strength and the anti-corrosion effect of the anti-corrosion paste.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The marine steel corrosion-resistant paste comprises the following components in parts by weight: 35 parts of white oil, 14 parts of calcium oil sulfonate, 20 parts of modified alumina solution and 2 parts of calcium oxide.
The modified alumina is prepared by the following steps:
a1. calcining alumina with the particle size of 0.1 mu m at 1200 ℃ for 8h;
a2. placing the calcined alumina powder into a dispersion system consisting of tetrahydrofuran or acetone, adding octyl triethoxysilane into the dispersion system, refluxing for 2h at 80 ℃, cooling, fully mixing uniformly, and cooling to obtain a modified alumina solution.
The preparation method of the marine steel corrosion-resistant paste comprises the following steps:
s1, weighing the raw materials in parts by weight, mixing and stirring white oil, calcium sulfonate oil and a modified alumina solution uniformly, and then placing the mixture in a reaction kettle to heat at 90 ℃ for 30min to obtain slurry;
s2, blending the reacted slurry and calcium oxide in a carbon dioxide-free atmosphere, gradually adding calcium oxide powder, continuously stirring and maintaining the temperature to be not higher than 60 ℃, steaming at a low temperature after the reaction is finished, removing water in a mixed system, and uniformly stirring again to obtain the marine steel corrosion-resistant paste.
Example 2
The marine steel corrosion-resistant paste comprises the following components in parts by weight: 45 parts of white oil, 10 parts of dodecenyl succinic acid, 50 parts of modified alumina solution and 0.5 part of calcium oxide.
The modified alumina is prepared by the following steps:
a1. calcining alumina with the particle size of 1.5 mu m at 800 ℃ for 16h;
a2. placing the calcined alumina powder into a dispersion system consisting of tetrahydrofuran or acetone, adding octyl triethoxysilane into the dispersion system, refluxing for 4h at 70 ℃, cooling, fully mixing uniformly, and cooling to obtain a modified alumina solution.
The preparation method of the marine steel corrosion-resistant paste comprises the following steps:
s1, weighing the raw materials in parts by weight, mixing and stirring white oil, dodecenylsuccinic acid and a modified alumina solution uniformly, and then placing the mixture in a reaction kettle to heat at 90 ℃ for 30min to obtain slurry;
s2, blending the reacted slurry and calcium oxide in a carbon dioxide-free atmosphere, gradually adding calcium oxide powder, continuously stirring and maintaining the temperature to be not higher than 60 ℃, steaming at a low temperature after the reaction is finished, removing water in a mixed system, and uniformly stirring again to obtain the marine steel corrosion-resistant paste.
Example 3
The marine steel corrosion-resistant paste comprises the following components in parts by weight: 35-45 parts of white oil, 12 parts of aluminum distearate, 35 parts of modified alumina solution and 1 part of calcium oxide.
The modified alumina is prepared by the following steps:
a1. calcining alumina with the particle size of 0.5 mu m at 1000 ℃ for 12h;
a2. placing the calcined alumina powder into a dispersion system consisting of tetrahydrofuran or acetone, adding octyl triethoxysilane into the dispersion system, refluxing for 3h at 75 ℃, cooling, fully mixing uniformly, and cooling to obtain a modified alumina solution.
The preparation method of the marine steel corrosion-resistant paste comprises the following steps:
s1, weighing the raw materials in parts by weight, uniformly mixing and stirring white oil, aluminum distearate and a modified alumina solution, and then placing the mixture in a reaction kettle to heat at 80 ℃ for 50min to obtain slurry;
s2, blending the reacted slurry and calcium oxide in a carbon dioxide-free atmosphere, gradually adding calcium oxide powder, continuously stirring and maintaining the temperature to be not higher than 60 ℃, steaming at a low temperature to remove water in a mixed system after the reaction is finished, and uniformly stirring again to obtain the marine steel corrosion-resistant paste.
Comparative example 1
This comparative example differs from example 2 in that the modified alumina is replaced by alumina.
Comparative example 2
This comparative example differs from example 2 in that no calcium oxide was added.
Comparative example 3
The comparative example differs from example 2 in that the system is ventilated with air during the preparation of the anti-corrosive paste.
Test examples
The corrosion-resistant pastes of all the embodiments and the comparative examples are prepared and the actual effects are verified through experiments, the experimental method refers to the test data of the salt water resistance test in the appendix E of GB/T32119 and the long-term steel protection effect in the salt water test, wherein the long-term steel protection effect is calculated through the steel weight loss rate, after the steel coated with the corrosion-resistant paste of 2mm is soaked in salt water for a certain time, the corrosion-resistant paste is removed, the surface corrosion is removed by adopting dilute acetic acid, the weight change of the steel before and after the test is compared, namely the data is the ratio of the steel part subjected to corrosion to the total steel mass, and the steel used in the experimental example is Q370qE steel.
As can be seen from the above table, the difference between example 2 and comparative example 1 is whether the alumina is modified, and since the modified alumina is adopted in example 2, the steel loss caused by long-term corrosion of the steel is reduced, and the corrosion of the steel surface is effectively prevented; compared with the comparative example 2, the difference of the example 2 is that whether calcium oxide is added or not, and the calcium oxide is contained in the example 2, so that the steel loss caused by long-term corrosion of the steel is reduced, and the corrosion of the surface of the steel is effectively prevented; the difference between the embodiment 2 and the comparative example 3 lies in whether the preparation process of the corrosion inhibitor is carried out in the environment containing carbon dioxide, the embodiment 2 still contains a large amount of calcium hydroxide before coating because the carbon dioxide is isolated, the substance gradually contacts with the carbon dioxide in the air after coating, so that a hardened surface layer is formed, the corrosion of salt water to the coating is delayed, the calcium hydroxide can play thickening and shaping effects in the preparation and coating processes of the corrosion inhibitor, the coating effect can be improved, and the corrosion inhibitor containing calcium carbonate not only cannot play a thickening effect, but also is easy to separate from other components of the corrosion inhibitor because the calcium hydroxide is a solid phase substance, so that the storage capacity of the corrosion inhibitor is reduced.
Although one embodiment of the present invention has been described in detail, the description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. The marine steel corrosion-resistant paste is characterized by comprising the following components in parts by weight: 35-45 parts of base oil, 10-14 parts of oily anticorrosive agent, 20-50 parts of modified alumina solution and 0.5-2 parts of calcium oxide.
2. The marine steel corrosion inhibiting paste of claim 1 wherein the base oil is white oil.
3. A marine steel corrosion inhibiting paste according to claim 1 wherein the oily corrosion inhibitor is one or more of calcium oil sulphonate, dodecenyl succinic acid or aluminium distearate.
4. The marine steel corrosion inhibitor paste according to claim 1, wherein the modified alumina is prepared by the following steps:
a1. calcining alumina with particle size of 0.1-1.5 μm at 800-1200 deg.C for 8-16h;
a2. placing the calcined alumina powder into a dispersion system consisting of tetrahydrofuran or acetone, adding a silane coupling agent containing an aliphatic chain into the dispersion system, refluxing for 2-4h at 70-80 ℃, cooling, fully mixing uniformly, and cooling to obtain a modified alumina solution.
5. The marine steel corrosion inhibiting paste according to claim 1, wherein the silane coupling agent containing an aliphatic chain is octyltriethoxysilane.
6. The method for preparing an anticorrosion paste for marine steel products according to any one of claims 1 to 5, characterized by comprising the following steps:
s1, weighing the raw materials in parts by weight, mixing and stirring the base oil, the oily anticorrosive agent and the modified alumina solution uniformly, and then placing the mixture in a reaction kettle to heat for 30-75min to obtain slurry;
s2, blending the reacted slurry and calcium oxide in a carbon dioxide-free atmosphere, gradually adding calcium oxide powder, continuously stirring and maintaining the temperature to be not higher than 60 ℃, steaming at a low temperature to remove water in a mixed system after the reaction is finished, and uniformly stirring again to obtain the marine steel corrosion-resistant paste.
7. The method for preparing corrosion inhibitor paste for marine steel products according to claim 6, wherein the heating temperature in step S1 is 70-90 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211308966.2A CN115725356B (en) | 2022-10-25 | 2022-10-25 | Marine steel anticorrosion paste and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211308966.2A CN115725356B (en) | 2022-10-25 | 2022-10-25 | Marine steel anticorrosion paste and preparation method thereof |
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| Publication Number | Publication Date |
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| CN115725356A true CN115725356A (en) | 2023-03-03 |
| CN115725356B CN115725356B (en) | 2023-08-29 |
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| KR20190064045A (en) * | 2017-11-30 | 2019-06-10 | 한국해양과학기술원 | Method for coating metal substrate based on nano particle spray coating for improving corrosion resistance and antifouling of marine equipment |
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| CN114050375A (en) * | 2021-11-15 | 2022-02-15 | 江苏厚生新能源科技有限公司 | Preparation method of modified aluminum oxide and PMMA mixed slurry coating diaphragm |
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2022
- 2022-10-25 CN CN202211308966.2A patent/CN115725356B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1836016A (en) * | 2003-06-16 | 2006-09-20 | 杰富意钢铁株式会社 | Highly corrosion-resistant surface-treated steel sheet and method for producing the same |
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| CN114050375A (en) * | 2021-11-15 | 2022-02-15 | 江苏厚生新能源科技有限公司 | Preparation method of modified aluminum oxide and PMMA mixed slurry coating diaphragm |
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| CN115725356B (en) | 2023-08-29 |
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