A high corrosion-resistant oil filler assembly plate and a processing technology thereof

Abstract

The application relates to a high-anticorrosion oil filler assembly plate and a processing technology thereof, and relates to the technical field of oil filler assembly plates.The high-anticorrosion oil filler assembly plate comprises an assembly plate body and an anticorrosion coating, the anticorrosion coating is obtained by coating anticorrosion paint on the surface of the assembly plate body, the anticorrosion paint comprises water-based epoxy resin 37-43%, fillers 15-19%, a curing agent 4-8%, a defoaming agent 1-3%, a leveling agent 1-2%, and the rest is filled with toluene to 100%; the fillers comprise aluminum tripolyphosphate, glass flake and polyaniline; and the application has the effect of improving the anticorrosion performance of the oil filler assembly plate.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of oil filler assembly plates, in particular to a high-corrosion-resistance oil filler assembly plate and a processing technology thereof. BACKGROUND

[0002] The oil filler assembly plate is obtained by casting cast iron or aluminum alloy through a casting process, and is generally used for filling gasoline and protecting a fuel tank.

[0003] Generally, the iron oil filler assembly plate is in contact with gasoline for a long time, and since the gasoline contains a certain amount of trace water and some corrosive substances, an electrochemical reaction can be generated between the iron and the gasoline, and long-term contact with the gasoline can easily cause the oil filler assembly plate to gradually rust and even perforate, thereby reducing the service life of the oil filler assembly plate. SUMMARY

[0004] In order to improve the corrosion resistance of the oil filler assembly plate and thereby improve the service life of the oil filler assembly plate, the application provides a high-corrosion-resistance oil filler assembly plate and a processing technology thereof.

[0005] In a first aspect, the application provides a high-corrosion-resistance oil filler assembly plate, which adopts the following technical scheme: a high-corrosion-resistance oil filler assembly plate, comprising an assembly plate body and a corrosion-resistant coating, the corrosion-resistant coating is obtained by coating corrosion-resistant paint on the surface of the assembly plate body, the corrosion-resistant paint comprises 37-43% of water-based epoxy resin, 15-19% of filler, 4-8% of curing agent, 1-3% of defoaming agent, 1-2% of leveling agent, and the rest is filled with toluene to 100%.

[0006] The filler comprises aluminum tripolyphosphate, glass flake and polyaniline.

[0007] By adopting the above technical scheme, the corrosion-resistant paint produced by using aluminum tripolyphosphate, glass flake and polyaniline as the filler is coated on the surface of the assembly plate body, so that the oil filler assembly plate has excellent corrosion resistance, and the actual use effect is good. The specific scheme is analyzed as follows:

[0008] Firstly, since the water-based epoxy resin molecule contains an ether bond and a benzene ring, the three-dimensional network structure formed after the water-based epoxy resin is crosslinked with the curing agent has a good protective effect on the assembly plate body.

[0009] Secondly, aluminum tripolyphosphate can release tripolyphosphate ions with strong complexing ability to divalent and trivalent iron ions in the corrosion process, and a dense passivation film is formed by the reaction of the two, thereby hindering the further corrosion of the corrosion medium to the assembly plate body and improving the corrosion resistance of the coating.

[0010] The glass flake contains a large amount of silicon hydroxyl group, so that the glass flake becomes a hydrophilic substance, and when the glass flake is added in the coating, the glass flake can be arranged in parallel and overlap in the inner wall of the coating to form a dense protective layer, effectively preventing the penetration of corrosive medium and increasing the anti-permeability of the coating.

[0011] After the polyaniline contacts the body of the assembly plate, oxidation reaction occurs when the polyaniline contacts water and oxygen in the air, and a dense passivation film is formed at the contact interface, thereby achieving the purpose of corrosion protection.

[0012] Moreover, the aluminum tripolyphosphate, the glass flake and the polyaniline can block the micro-channels and micro-cracks formed by the curing of the water-based epoxy resin, hinder the penetration path of corrosive ions, and improve the corrosion resistance of the coating.

[0013] In addition, the polyaniline uniformly coats the surface of the glass flake, enhances the compatibility of the glass flake with the water-based epoxy resin, and plays a role in improving the corrosion resistance of the coating.

[0014] Moreover, the water-based epoxy resin has an epoxy group, and the polyaniline molecule contains a secondary amine group, which reacts with the epoxy group to form a tertiary amine and a hydroxyl group, and the hydroxyl group further reacts with the epoxy group and accelerates the reaction, and finally forms a cross-linked network structure. Therefore, the addition of polyaniline in the water-based epoxy resin can promote the occurrence of cross-linking reaction, thereby improving the cross-linking density of the coating and the bonding tightness between the coating and the body of the assembly plate.

[0015] Therefore, the corrosion-resistant coating produced by using the aluminum tripolyphosphate, the glass flake and the polyaniline as fillers and coated on the surface of the body of the assembly plate can improve the corrosion resistance of the body of the assembly plate, thereby prolonging the service life of the oil filler assembly plate.

[0016] As a preferred embodiment, the mass ratio of the aluminum tripolyphosphate, the glass flake and the polyaniline is (2.3-2.5):1:(1.6-1.8).

[0017] By adopting the above technical solution, the corrosion resistance of the corrosion-resistant coating can be effectively improved by controlling the mass ratio of the aluminum tripolyphosphate, the glass flake and the polyaniline within the above range.

[0018] As a preferred embodiment, the aluminum tripolyphosphate is prepared by modification, and the modification method of the aluminum tripolyphosphate comprises the following steps:

[0019] The carrageenan and the aluminum tripolyphosphate are added in N,N-dimethylformamide, stirred uniformly, heated, then phosphorus pentoxide is added, stirred uniformly, then filtered, and finally the filtered material is dried to obtain modified aluminum tripolyphosphate.

[0020] By adopting the technical scheme, since the waterborne epoxy resin is prepared by using water as a solvent, and the aluminum tripolyphosphate is hardly soluble in water, the interface compatibility between the waterborne epoxy resin and the aluminum tripolyphosphate is poor.

[0021] The carrageenan is a polysaccharide polymer extracted from some red algae, is a bio-based material, is easily soluble in water, has a strong water absorption and water retention, and can be used as a bridge between the waterborne epoxy resin and the aluminum tripolyphosphate; after the aluminum tripolyphosphate is modified by grafting, a large number of hydroxyl groups are introduced on the surface of the aluminum tripolyphosphate, and the hydroxyl groups can form hydrogen bonds with water, thereby improving the dispersibility and stability of the aluminum tripolyphosphate in the waterborne system, and further improving the interface compatibility between the waterborne epoxy resin and the aluminum tripolyphosphate, and effectively improving the corrosion resistance of the anticorrosive coating.

[0022] Preferably, the mass ratio of the aluminum tripolyphosphate to the carrageenan is 1:(0.5-0.7).

[0023] By adopting the technical scheme, the mass ratio of the aluminum tripolyphosphate to the carrageenan is controlled in the above range, and the interface compatibility between the waterborne epoxy resin and the aluminum tripolyphosphate can be effectively improved.

[0024] Preferably, the glass flake is prepared by modification, and the modification preparation method of the glass flake comprises the following steps:

[0025] The glass flake and the silane coupling agent are added into anhydrous ethanol, stirred uniformly, and then dried and ground to prepare the modified glass flake.

[0026] By adopting the technical scheme, the silane coupling agent has inorganic and organic groups, and can react with and be dissolved in the waterborne epoxy resin; after the glass flake is modified by the silane coupling agent, the organic groups are grafted to the surface of the glass flake, the interface compatibility between the glass flake and the waterborne epoxy resin is improved, and the corrosion resistance of the anticorrosive coating is improved.

[0027] Preferably, the mass ratio of the glass flake to the silane coupling agent is 1:(0.34-0.42).

[0028] By adopting the technical scheme, the mass ratio of the glass flake to the silane coupling agent is controlled in the above range, and the interface compatibility between the glass flake and the waterborne epoxy resin can be effectively improved.

[0029] Preferably, the silane coupling agent is KH570.

[0030] Preferably, the coating further comprises a benzotriazole.

[0031] By adopting the technical scheme, when the benzotriazole After contacting with the assembly plate body, the benzene triazoles The nitrogen atoms in the benzene triazoles can form coordination bonds with metal ions on the assembly plate body, thereby forming a protective film, and further isolating the assembly plate body from the external environment through the protective film, thereby improving the corrosion resistance of the assembly plate body.

[0032] In addition, polyaniline has an irregular outer surface and a complex inner surface, a large surface energy, a large adsorption, and a high strong activity, so that polyaniline can be used as a carrier for adsorbing benzene triazoles , thereby improving the corrosion inhibition function of the benzene triazoles , and further improving the corrosion resistance of the corrosion-resistant coating.

[0033] As preferred, the benzene triazoles account for 2-3% of the total mass of the corrosion-resistant coating.

[0034] In a second aspect, the processing process of the high-corrosion-resistant oil filler assembly plate provided by the present application is as follows:

[0035] As preferred, the processing process of the high-corrosion-resistant oil filler assembly plate of the first aspect includes the following steps:

[0036] S1, placing the assembly plate body into an aqueous acetone solution for ultrasonic treatment, and then sequentially washing and drying the assembly plate body after ultrasonic treatment to obtain a pretreated assembly plate body;

[0037] S2, mixing the water-based epoxy resin, the filler, the curing agent, the defoaming agent, the leveling agent, and the toluene to obtain a corrosion-resistant coating, then spraying the corrosion-resistant coating on the pretreated assembly plate body, and finally curing the sprayed assembly plate body to obtain a high-corrosion-resistant assembly plate body.

[0038] In summary, the present application has at least one of the following beneficial technical effects:

[0039] 1. The three-dimensional network structure formed by cross-linking the water-based epoxy resin and the curing agent has a good protective effect on the assembly plate body; the aluminum tripolyphosphate forms a dense passivation film on the surface of the assembly plate body, thereby hindering further corrosion of the assembly plate body by the corrosion medium; the glass flake can be arranged in parallel and overlap on the inner wall of the coating to form a dense protective layer, effectively hindering the penetration of the corrosion medium and increasing the anti-permeation ability of the coating; after the polyaniline contacts with the assembly plate body, a dense passivation film is formed at the contact interface, thereby achieving the purpose of corrosion protection; and the aluminum tripolyphosphate, the glass flake, and the polyaniline can block the micro-channels and micro-cracks formed by the curing of the water-based epoxy resin, hinder the penetration path of corrosion ions, and improve the corrosion resistance of the coating.

[0040] 2. Carrageenan can be used as a bridge between waterborne epoxy resin and aluminum tripolyphosphate; when aluminum tripolyphosphate is grafted and modified, a large number of hydroxyl groups are introduced onto the surface, and the hydroxyl groups can form hydrogen bonds with water, thereby improving the dispersibility and stability of aluminum tripolyphosphate in the waterborne system, and further improving the interfacial compatibility between the waterborne epoxy resin and aluminum tripolyphosphate, and effectively improving the corrosion resistance of the anticorrosive coating. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a schematic diagram of the overall structure of a high-corrosion-resistant oil filler assembly plate in the embodiment of the present application.

[0042] BRIEF DESCRIPTION OF DRAWINGS:

[0043] 1. Assembly plate body; 2. Anti-corrosion coating. DETAILED DESCRIPTION

[0044] The following will be further described in detail in combination with the Figure 1 The present application is further described in detail.

[0045] The present application discloses a high-corrosion-resistant oil filler assembly plate. Referring to Figure 1 , the high-corrosion-resistant oil filler assembly plate comprises an assembly plate body 1 and an anti-corrosion coating 2, which is obtained by coating an anti-corrosion coating on the surface of the assembly plate body 1.

[0046] The present application will be further described in detail in combination with the examples and comparative examples, and the raw materials involved in the present application can be obtained by market purchase. The waterborne epoxy resin is provided by Jiangsu Oumomax New Material Co., Ltd., the aluminum tripolyphosphate is provided by Jinjinle (Hunan) Chemical Co., Ltd., the glass flake is provided by Wuhan Prolav Biological Technology Co., Ltd., the polyaniline is provided by Hubei Jianmo Biological Technology Co., Ltd., the polyamide is provided by Zhenjiang Danbao Resin Co., Ltd., the polytetrafluoroethylene is provided by Jinhua Fluoromax Chemical Technology Co., Ltd., and the polydimethylsiloxane is provided by Shanghai Dingfen Chemical Technology Co., Ltd.

[0047] Example 1

[0048] The anti-corrosion coating comprises waterborne epoxy resin 40 g, filler 17 g, curing agent 6 g, defoaming agent 2 g, leveling agent 1.5 g, and toluene 33.5 g.

[0049] The filler comprises aluminum tripolyphosphate, glass flake and polyaniline, and the ratio of aluminum tripolyphosphate, glass flake and polyaniline is 2.4:1:1.7.

[0050] The curing agent is polyamide, the defoaming agent is polytetrafluoroethylene, and the leveling agent is polydimethylsiloxane.

[0051] The preparation method of the high-corrosion-resistant oil filler assembly plate comprises the following steps:

[0052] S1, the assembly plate body is placed in an aqueous acetone solution (the concentration of the aqueous acetone solution is 80%) and ultrasonically cleaned for 15 minutes, then washed with anhydrous ethanol, and then placed in an oven for drying to obtain a pretreated assembly plate body;

[0053] S2, the water-based epoxy resin, the filler, the curing agent, the defoaming agent, the leveling agent, and the toluene are mixed to obtain an anticorrosive coating, the mixed anticorrosive coating is then sprayed on the pretreated assembly plate body using a spray gun, and finally the sprayed assembly plate body is placed in an environment at 25°C for curing to obtain the high-anticorrosion oil filler assembly plate.

[0054] Example 2

[0055] The anticorrosive coating comprises 37 g of water-based epoxy resin, 15 g of filler, 4 g of curing agent, 1 g of defoaming agent, 1 g of leveling agent, and 42 g of toluene.

[0056] The filler comprises aluminum tripolyphosphate, glass flake, and polyaniline, and the aluminum tripolyphosphate, glass flake, and polyaniline are in a ratio of 2.3:1:1.8.

[0057] The curing agent is polyamide, the defoaming agent is polytetrafluoroethylene, and the leveling agent is polydimethylsiloxane.

[0058] The method for preparing the high-anticorrosion oil filler assembly plate comprises the following steps:

[0059] S1, the assembly plate body is placed in an aqueous acetone solution (the concentration of the aqueous acetone solution is 80%) and ultrasonically cleaned for 15 minutes, then washed with anhydrous ethanol, and then placed in an oven for drying to obtain a pretreated assembly plate body;

[0060] S2, the water-based epoxy resin, the filler, the curing agent, the defoaming agent, the leveling agent, and the toluene are mixed to obtain an anticorrosive coating, the mixed anticorrosive coating is then sprayed on the pretreated assembly plate body using a spray gun, and finally the sprayed assembly plate body is placed in an environment at 25°C for curing to obtain the high-anticorrosion oil filler assembly plate.

[0061] Example 3

[0062] The anticorrosive coating comprises 43 g of water-based epoxy resin, 19 g of filler, 8 g of curing agent, 3 g of defoaming agent, 2 g of leveling agent, and 25 g of toluene.

[0063] The filler comprises aluminum tripolyphosphate, glass flake, and polyaniline, and the aluminum tripolyphosphate, glass flake, and polyaniline are in a ratio of 2.5:1:1.6.

[0064] The curing agent is polyamide, the defoaming agent is polytetrafluoroethylene, and the leveling agent is polydimethylsiloxane.

[0065] The preparation method of the high-anticorrosion oil filler assembly plate comprises the following steps:

[0066] S1, the assembly plate body is placed in an acetone aqueous solution (the concentration of the acetone aqueous solution is 80%) for ultrasonic cleaning for 15 minutes, then washed with anhydrous ethanol, and then placed in an oven for drying to obtain a pretreated assembly plate body;

[0067] S2, the water-based epoxy resin, the filler, the curing agent, the defoaming agent, the leveling agent, and the toluene are mixed to obtain an anticorrosion coating, then the mixed anticorrosion coating is sprayed on the pretreated assembly plate body by using a spray gun, and finally the sprayed assembly plate body is placed in an environment at 25°C for curing to obtain the high-anticorrosion oil filler assembly plate.

[0068] Example 4

[0069] The difference between Example 4 and Example 1 is that the mass ratio of aluminum tripolyphosphate, glass flake, and polyaniline is 2:1:1.7.

[0070] Example 5

[0071] The difference between Example 5 and Example 1 is that the mass ratio of aluminum tripolyphosphate, glass flake, and polyaniline is 2.8:1:1.7.

[0072] Example 6

[0073] The difference between Example 6 and Example 1 is that the mass ratio of aluminum tripolyphosphate, glass flake, and polyaniline is 2.4:1:1.3.

[0074] Example 7

[0075] The difference between Example 7 and Example 1 is that the mass ratio of aluminum tripolyphosphate, glass flake, and polyaniline is 2.4:1:2.1.

[0076] Example 8

[0077] The difference between Example 8 and Example 1 is that the aluminum tripolyphosphate is modified, and the modified preparation method of the aluminum tripolyphosphate comprises the following steps:

[0078] 1.2 g of carrageenan and 2 g of aluminum tripolyphosphate are added to 80 mL of N,N-dimethylformamide, stirred uniformly, heated to 60°C, then 1 g of phosphorus pentoxide is added, stirred uniformly, then filtered, and finally the obtained filtrate is placed in a vacuum drying oven at 40°C for 10 h to obtain modified aluminum tripolyphosphate.

[0079] Example 9

[0080] The difference between Example 9 and Example 1 is that the aluminum tripolyphosphate is modified, and the modified preparation method of the aluminum tripolyphosphate comprises the following steps:

[0081] 1 g carrageenan and 2 g aluminum tripolyphosphate were added into 80 mL N,N-dimethylformamide, after stirring uniformly, temperature was raised to 60℃, then 1 g phosphorus pentoxide was added, after stirring uniformly, filtration was carried out, finally the obtained filtrate was placed in a vacuum drying oven at 40℃ for 10 h, to obtain modified aluminum tripolyphosphate.

[0082] Example 10

[0083] The difference between Example 10 and Example 1 is that the aluminum tripolyphosphate is prepared by modification, and the modified preparation method of the aluminum tripolyphosphate comprises the following steps:

[0084] 1.4 g carrageenan and 2 g aluminum tripolyphosphate were added into 80 mL N,N-dimethylformamide, after stirring uniformly, temperature was raised to 60℃, then 1 g phosphorus pentoxide was added, after stirring uniformly, filtration was carried out, finally the obtained filtrate was placed in a vacuum drying oven at 40℃ for 10 h, to obtain modified aluminum tripolyphosphate.

[0085] Example 11

[0086] The difference between Example 11 and Example 8 is that the mass ratio of aluminum tripolyphosphate and carrageenan is 1:0.2.

[0087] Example 12

[0088] The difference between Example 12 and Example 8 is that the mass ratio of aluminum tripolyphosphate and carrageenan is 1:1.

[0089] Example 13

[0090] The difference between Example 13 and Example 8 is that the glass flake is prepared by modification, and the modified preparation method of the glass flake comprises the following steps:

[0091] 10 g glass flake and 3.8 g silane coupling agent were added into 100 g anhydrous ethanol, after stirring uniformly, they were placed in a drying oven for drying for 12 h, and then were ground, to obtain modified glass flake.

[0092] The silane coupling agent is KH570.

[0093] Example 14

[0094] The difference between Example 14 and Example 8 is that the glass flake is prepared by modification, and the modified preparation method of the glass flake comprises the following steps:

[0095] 10 g glass flake and 3.4 g silane coupling agent were added into 100 g anhydrous ethanol, after stirring uniformly, they were placed in a drying oven for drying for 12 h, and then were ground, to obtain modified glass flake.

[0096] The silane coupling agent is KH570.

[0097] Example 15

[0098] Example 15 and Example 8 differ in that the glass flake is prepared by modification, and the method for preparing the modified glass flake comprises the following steps:

[0099] 10 g of glass flake and 4.2 g of silane coupling agent are added to 100 g of anhydrous ethanol, stirred uniformly, dried in a drying box for 12 h, and then ground to prepare the modified glass flake.

[0100] The silane coupling agent is KH570.

[0101] Example 16

[0102] Example 16 and Example 13 differ in that the mass ratio of glass flake to silane coupling agent is 1:0.3.

[0103] Example 17

[0104] Example 17 and Example 13 differ in that the mass ratio of glass flake to silane coupling agent is 1:0.46.

[0105] Example 18

[0106] Example 18 and Example 13 differ in that the anticorrosive coating comprises 40 g of water-based epoxy resin, 17 g of filler, 6 g of curing agent, 2 g of defoaming agent, 1.5 g of leveling agent, 2.5 g of benzotriazole, and 31 g of toluene. 2.5 g, toluene 31 g.

[0107] Example 19

[0108] Example 19 and Example 13 differ in that the anticorrosive coating comprises 40 g of water-based epoxy resin, 17 g of filler, 6 g of curing agent, 2 g of defoaming agent, 1.5 g of leveling agent, 2 g of benzotriazole, and 31.5 g of toluene. 2 g, toluene 31.5 g.

[0109] Example 20

[0110] Example 20 and Example 13 differ in that the anticorrosive coating comprises 40 g of water-based epoxy resin, 17 g of filler, 6 g of curing agent, 2 g of defoaming agent, 1.5 g of leveling agent, 3 g of benzotriazole, and 30.5 g of toluene. 3 g, toluene 30.5 g.

[0111] Comparative Example 1

[0112] Comparative Example 1 and Example 1 differ in that the filler only contains aluminum tripolyphosphate.

[0113] Comparative Example 2

[0114] The difference between Comparative Example 2 and Example 1 is that the filler contains only glass flake.

[0115] Comparative Example 3

[0116] The difference between Comparative Example 3 and Example 1 is that the filler contains only polyaniline.

[0117] Comparative Example 4

[0118] The difference between Comparative Example 4 and Example 1 is that the filler contains only aluminum tripolyphosphate and glass flake.

[0119] Comparative Example 5

[0120] The difference between Comparative Example 5 and Example 1 is that the filler contains only aluminum tripolyphosphate and polyaniline.

[0121] Comparative Example 6

[0122] The difference between Comparative Example 6 and Example 1 is that the filler contains only glass flake and polyaniline.

[0123] Performance testing:

[0124] The anti-corrosion performance testing was performed on the filler neck assembly panels prepared from Examples 1-20 and Comparative Examples 1-6.

[0125] 1. Anti-corrosion performance testing

[0126] (1) Salt water resistance test

[0127] Five samples of the filler neck assembly panels coated with the coating were taken, and the time required for complete corrosion under the condition of 20% NaCl was calculated, the average value was taken, and the test results were recorded in Table 1.

[0128] (2) Acid resistance test

[0129] Five samples of the filler neck assembly panels coated with the coating were taken, and the time required for complete corrosion under the condition of 50% concentrated sulfuric acid was calculated, the average value was taken, and the test results were recorded in Table 1.

[0130] (3) Alkali resistance test

[0131] Five samples of the filler neck assembly panels coated with the coating were taken, and the time required for complete corrosion under the condition of 10% NaOH was calculated, the average value was taken, and the test results were recorded in Table 1.

[0132] Table 1

[0133]

[0134]

[0135] Data analysis

[0136] Specifically combined with the test results of Examples 8-10 and Example 1, the salt resistance of Examples 8-10 is >3307h, the acid resistance is >2638h, and the alkali resistance is >2827h, and the salt resistance of Example 1 is >2673h, the acid resistance is >2152h, and the alkali resistance is >2366h, so it can be seen that the corrosion resistance of Examples 8-10 is better than that of Example 1, and the analysis is as follows: the difference between Examples 8-10 and Example 1 is that the aluminum tripolyphosphate is modified by carrageenan, which introduces a large number of hydroxyl groups on the surface of the aluminum tripolyphosphate, thereby improving the dispersibility and stability of the aluminum tripolyphosphate in the water-based system, and then the interfacial compatibility between the water-based epoxy resin and the aluminum tripolyphosphate, effectively improving the corrosion resistance of the corrosion-resistant coating.

[0137] Specifically combined with the test results of Examples 13-15 and Example 8, the salt resistance of Examples 13-15 is >3849h, the acid resistance is >3215h, and the alkali resistance is >3389h, and the salt resistance of Example 8 is >3348h, the acid resistance is >2672h, and the alkali resistance is >2853h, so it can be seen that the corrosion resistance of Examples 13-15 is better than that of Example 8, and the analysis is as follows: the difference between Examples 13-15 and Example 8 is that the glass flake is modified by silane coupling agent, which makes the organic group grafted to the surface of the glass flake, thereby improving the interfacial compatibility between the glass flake and the water-based epoxy resin, and then improving the corrosion resistance of the corrosion-resistant coating.

[0138] Specifically combined with the test results of Examples 18-20 and Example 13, the salt resistance of Examples 18-20 is >4211h, the acid resistance is >3657h, and the alkali resistance is >3864h, and the salt resistance of Example 13 is >3873h, the acid resistance is >3267h, and the alkali resistance is >3429h, so it can be seen that the corrosion resistance of Examples 18-20 is better than that of Example 13, and the analysis is as follows: the difference between Examples 18-20 and Example 13 is that the corrosion-resistant coating also adds benzotriazole Benzotriazole A protective film can be formed on the surface of the assembly plate body, thereby reducing the corrosion and oxidation of the surface of the assembly plate body; in addition, polyaniline can be used as a carrier for adsorbing benzotriazole , thereby improving the corrosion inhibition effect of benzotriazole in the coating, thereby improving the corrosion resistance of the corrosion-resistant coating.

[0139] Specifically combined with the test results of Comparative Example 1 and Example 1, the salt resistance of Comparative Example 1 is >2032h, the acid resistance is >1574h, and the alkali resistance is >1812h, and the salt resistance of Example 1 is >2673h, the acid resistance is >2152h, and the alkali resistance is >2366h, so it can be seen that the corrosion resistance of Comparative Example 1 is better than that of Example 1, and the analysis is as follows: the difference between Example 1 and Comparative Example 1 is that in addition to aluminum tripolyphosphate in the filler, there are also glass flake and polyaniline, both of which can improve the corrosion resistance of the coating.

[0140] Specifically combined with the test results of Comparative Example 2 and Example 1, the salt resistance of Comparative Example 2 is >1989h, the acid resistance is >1612h, and the alkali resistance is >1769h, and the salt resistance of Example 1 is >2673h, the acid resistance is >2152h, and the alkali resistance is >2366h, so it can be seen that the corrosion resistance of Comparative Example 2 is better than that of Example 1, and the analysis is as follows: the difference between Example 1 and Comparative Example 2 is that in addition to glass flake in the filler, there are also aluminum tripolyphosphate and polyaniline, both of which can improve the corrosion resistance of the coating.

[0141] Specifically combined with the test results of Comparative Example 3 and Example 1, the salt resistance of Comparative Example 3 is >2188h, the acid resistance is >1732h, and the alkali resistance is >1948h, and the salt resistance of Example 1 is >2673h, the acid resistance is >2152h, and the alkali resistance is >2366h, so it can be seen that the corrosion resistance of Comparative Example 3 is better than that of Example 1, and the analysis is as follows: the difference between Example 1 and Comparative Example 3 is that in addition to polyaniline in the filler, there are also aluminum tripolyphosphate and glass flake, both of which can improve the corrosion resistance of the coating.

[0142] Specifically combined with the test results of Comparative Example 4 and Example 1, the salt resistance of Comparative Example 4 is >2295h, the acid resistance is >1912h, and the alkali resistance is >2089h, and the salt resistance of Example 1 is >2673h, the acid resistance is >2152h, and the alkali resistance is >2366h, so it can be seen that the corrosion resistance of Comparative Example 4 is better than that of Example 1, and the analysis is as follows: the difference between Example 1 and Comparative Example 4 is that in addition to aluminum tripolyphosphate and glass flake in the filler, there is also polyaniline, which can improve the corrosion resistance of the coating on one hand, and the mutual cooperation of aluminum tripolyphosphate, glass flake and polyaniline realizes better corrosion resistance of the coating compared to each single addition.

[0143] Specifically combined with the test results of Comparative Example 5 and Example 1, the salt resistance of Comparative Example 5 is >2342, the acid resistance is >1883h, and the alkali resistance is >2042h, and the salt resistance of Example 1 is >2673h, the acid resistance is >2152h, and the alkali resistance is >2366h, so it can be seen that the corrosion resistance of Comparative Example 5 is better than that of Example 1, and the analysis is as follows: the difference between Example 1 and Comparative Example 5 is that the filler contains glass flake in addition to polyaluminum phosphate and polyaniline, on the one hand the glass flake itself can improve the corrosion resistance of the coating, and on the other hand the mutual cooperation of polyaluminum phosphate, glass flake and polyaniline realizes better corrosion resistance of the coating than adding each of them alone.

[0144] Specifically combined with the test results of Comparative Example 6 and Example 1, the salt resistance of Comparative Example 6 is >2488, the acid resistance is >2014h, and the alkali resistance is >2168h, and the salt resistance of Example 1 is >2673h, the acid resistance is >2152h, and the alkali resistance is >2366h, so it can be seen that the corrosion resistance of Comparative Example 6 is better than that of Example 1, and the analysis is as follows: the difference between Example 1 and Comparative Example 6 is that the filler contains polyaluminum phosphate in addition to glass flake and polyaniline, on the one hand polyaluminum phosphate itself can improve the corrosion resistance of the coating, and on the other hand the mutual cooperation of polyaluminum phosphate, glass flake and polyaniline realizes better corrosion resistance of the coating than adding each of them alone.

[0145] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A high corrosion resistant filler neck assembly plate, characterized by: The oil filler assembly plate comprises an assembly plate body (1) and an anti-corrosion coating (2) obtained by applying an anti-corrosion coating to the surface of the assembly plate body (1), wherein the anti-corrosion coating comprises 37-43% of water-based epoxy resin, 15-19% of filler, 4-8% of curing agent, 1-3% of defoaming agent, 1-2% of leveling agent, and the rest is filled with toluene to 100%. The filler comprises aluminum tripolyphosphate, glass flake and polyaniline. The mass ratio of the aluminum tripolyphosphate, the glass flake and the polyaniline is (2.3-2.5):1:(1.6-1.8). The coating further comprises benzotriazole.

2. A high corrosion resistant filler neck assembly plate according to claim 1, characterized in that: The aluminum tripolyphosphate is prepared by modification, and the modification method comprises the following steps: The carrageenan and the aluminum tripolyphosphate are added to N,N-dimethylformamide, stirred uniformly, heated, then the phosphorus pentoxide is added, stirred uniformly, then filtered, and finally the filtered material is dried to obtain the modified aluminum tripolyphosphate.

3. A high corrosion resistant filler neck assembly plate according to claim 2, characterized in that: The mass ratio of the aluminum tripolyphosphate and the carrageenan is 1:(0.5-0.7).

4. A high corrosion resistant filler neck assembly plate according to claim 1, characterized in that: The glass flake is prepared by modification, and the modification method comprises the following steps: The glass flake and the silane coupling agent are added to anhydrous ethanol, stirred uniformly, dried and ground to obtain the modified glass flake.

5. A high corrosion resistant filler neck assembly plate according to claim 4, characterized in that: The mass ratio of the glass flake and the silane coupling agent is 1:(0.34-0.42).

6. A high corrosion resistant filler neck assembly plate according to claim 4, wherein: The silane coupling agent is KH570.

7. A high corrosion resistant filler neck assembly plate according to claim 1, wherein: The benzotriazole accounts for 20-40% of the total mass of the polyaniline.

8. A process for manufacturing a high corrosion resistant filler neck assembly plate as claimed in claim 1, wherein: The method comprises the following steps: S1, the assembly plate body is placed in an aqueous acetone solution for ultrasonic treatment, then the ultrasonic treated assembly plate body is sequentially washed and dried to obtain a pretreated assembly plate body; S2, the water-based epoxy resin, the filler, the curing agent, the defoaming agent, the leveling agent and toluene are mixed to obtain an anti-corrosion coating, then the anti-corrosion coating is sprayed on the pretreated assembly plate body, and finally the sprayed assembly plate body is cured to obtain an oil filler assembly plate with high corrosion resistance.

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