Anticorrosive coating for bimetallic alkene earthing tank as well as preparation method and application of anticorrosive coating
By loading bimetalene-loaded titanium dioxide and phenolic epoxy resin, the acid, alkali and mechanical properties of the soil-covered can coating are enhanced, and the problem of poor resistance to existing coatings is solved, which significantly improves the corrosion resistance and safety of the storage tank. .
Patent Information
- Application Number
- CN202411601864.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-01-14
AI Technical Summary
The existing soil-covered can coatings have poor tolerance to the soil environment, are prone to falling off, are not resistant to acid and alkali, and cannot effectively prevent storage tank corrosion, increasing the safety risks of storage tanks.
Titanium dioxide and phenolic epoxy resins loaded with bimetalene are used to uniformly disperse palladium-molybdenum bimetalene to enhance the reducing properties of the coating, improve the water, acid and alkali resistance of the coating, and improve the mechanical properties to prevent falling off.
It significantly improves the corrosion resistance and mechanical properties of the soil-covered tank, ensures that the coating is not easy to fall off, enhances the anti-corrosion performance of the storage tank, and reduces the safety risks of the storage tank.
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Figure BDA0005128524620000101
Abstract
Description
Technical Field
[0001] The present application relates to a bimetallic olefin anti-corrosion coating for an earth-covered tank and a preparation method and application thereof, belonging to the technical field of anti-corrosion of earth-covered tanks. Background Art
[0002] Accidents such as leakage and explosion of liquid hydrocarbon storage tanks can cause great casualties and property losses to enterprises and society. In order to reduce the use risk of liquid hydrocarbon storage tanks and achieve the inherent safety of storage tanks, earth-covered tank technology has been increasingly studied and applied.
[0003] Compared with conventional storage tanks, the tank body of an earth-covered tank is usually placed under the ground or covered with a large amount of soil. Since the tank is shielded by the covering layer, the temperature of the tank is more stable, reducing the probability of risk. At the same time, the covering layer protects the tank body, preventing the tank from leaking or exploding due to external forces such as nearby heat sources, explosion shock waves, and flying objects. In addition, covering the tank body with soil can reduce the impact of the tank body's own leakage and other reasons on the surrounding environment, and avoid the occurrence of steam cloud explosions. Therefore, the use of earth-covered tank technology can greatly improve the safety of storage tanks.
[0004] However, since the storage tank is covered by a large amount of soil, the moist soil and the chloride ions, sulfate ions, microorganisms, etc. in the soil will cause corrosion to the storage tank. Existing large-scale earth-covered storage tanks generally adopt the method of spraying anti-corrosion coating on the surface of the tank body to minimize the corrosion and safety risks of the storage tank. Due to the late start of domestic earth-covered tank technology, the existing earth-covered tank coatings basically draw on the engineering experience of buried pipelines, using traditional epoxy coal tar, zinc-rich epoxy coating, epoxy mica iron oxide coating, etc. However, the existing coatings have poor tolerance to the soil environment, are easy to fall off, and are not resistant to acid and alkali. Therefore, when designing the anti-corrosion of earth-covered tanks, it is necessary to develop coating materials with better anti-corrosion performance. Summary of the invention
[0005] In order to solve the above problems, a bimetallic olefin anti-corrosion coating for earth-covered tanks and a preparation method and application thereof are provided. The bimetallic olefin anti-corrosion coating for earth-covered tanks is prepared by adding titanium dioxide and phenolic epoxy resin loaded with bimetallic olefins in a specific proportion so that the bimetallic olefins are uniformly dispersed in the phenolic epoxy resin. The addition of palladium-molybdenum bimetallic olefins allows the coating to gather a large number of strongly reducing electrons on the surface of the earth-covered tank after being sprayed on the surface of the earth-covered tank, thereby enhancing the reducing property of the surface of the earth-covered tank and preventing oxidative corrosion. The water-resistance, acid-resistance and alkali-resistance of the earth-covered tank are significantly improved, while its mechanical properties are improved and the coating is not easy to fall off.
[0006] According to one aspect of the present application, a bimetallic olefin anti-corrosion coating for an earth-covered tank is provided, comprising bimetallic olefin-loaded titanium dioxide and phenolic epoxy resin; the mass ratio of the bimetallic olefin-loaded titanium dioxide to the phenolic epoxy resin is 1:(20-50); the bimetallic olefin is palladium-molybdenum bimetallic olefin.
[0007] Specifically, the present application makes specific restrictions on the mass ratio of titanium dioxide loaded with bimetallic olefins to phenolic epoxy resin. On the one hand, within this mass ratio range, the corrosion resistance and mechanical properties of the earth-covered tank can be significantly improved; on the other hand, without affecting the corrosion resistance and mechanical properties, the cost is reasonably controlled, which facilitates the promotion and application of the bimetallic olefin earth-covered tank anti-corrosion coating.
[0008] Optionally, the palladium source of the palladium-platinum bimetallic olefin is palladium acetate.
[0009] Optionally, the preparation method of the palladium-platinum bimetallic olefin comprises the following steps:
[0010] The aqueous solution of palladium acetate, carbonyl molybdenum, ascorbic acid and surfactant is evenly mixed and reacted under continuous stirring and heating. After the reaction is completed, the palladium-molybdenum bimetallic olefin is obtained after centrifugation, washing and freeze-drying.
[0011] Specifically, under the action of ascorbic acid and the dispersing effect of the surfactant, palladium acetate and carbonyl molybdenum are fully reduced to elemental metals. During the reduction process, palladium and molybdenum are superimposed together to form a metal olefin form.
[0012] Optionally, the mass ratio of the aqueous solution of palladium acetate, carbonyl molybdenum, ascorbic acid and surfactant is 1:(0.5-2):(1.5-5.0):(40-100); the surfactant is hexadecyltrimethylammonium bromide or didecyltrimethylammonium bromide.
[0013] Preferably, the mass ratio of the aqueous solution of palladium acetate, carbonyl molybdenum, ascorbic acid and surfactant is 1:0.8:3:50.
[0014] Optionally, the reaction temperature is 60-100° C., the reaction time is 10-24 h; the washing is performed by washing with ethanol for 3-5 times; and the concentration of the aqueous solution of the surfactant is 0.05-0.2 mol / L.
[0015] Specifically, the reaction temperature is 80° C., the reaction time is 12 h; the washing is performed by washing with ethanol for 5 times; and the concentration of the aqueous solution of the surfactant is 0.1 mol / L.
[0016] Preferably, the surfactant is cetyltrimethylammonium bromide.
[0017] According to another aspect of the present application, the present application also provides a method for preparing the above-mentioned bimetallic olefin soil-covered tank anti-corrosion coating, comprising the following steps:
[0018] (1) preparing palladium-platinum bimetallic olefins;
[0019] (2) Loading palladium-platinum bimetallic olefin on titanium dioxide: mixing palladium-platinum bimetallic olefin, titanium dioxide and an aqueous solution of a surfactant uniformly, stirring continuously, centrifuging, washing and drying to obtain titanium dioxide loaded with palladium-platinum bimetallic olefin;
[0020] (3) The titanium dioxide loaded with palladium-molybdenum bimetallic olefin is mixed evenly with phenolic epoxy resin to obtain a bimetallic olefin anti-corrosion coating for earth-covered tanks.
[0021] Optionally, in step (2), the mass ratio of the aqueous solution of palladium-platinum bimetallic olefin, titanium dioxide and surfactant is 1:(50-200):(100-300); the surfactant is hexadecyltrimethylammonium bromide or didecyltrimethylammonium bromide.
[0022] Preferably, the mass ratio of the aqueous solution of palladium-platinum bimetallic olefin, titanium dioxide and surfactant is 1:180:200; the surfactant is hexadecyltrimethylammonium bromide.
[0023] Optionally, in step (2), the concentration of the aqueous solution on the surface is 0.05-0.2 mol / L; the continuous stirring time is 12 h; the washing is 5 times of ethanol washing; and the drying is 12 h at 80°C.
[0024] Preferably, in step (2), the concentration of the aqueous solution on the surface is 0.1 mol / L; the continuous stirring time is 10-24 h; the washing is 3-5 times of ethanol washing; and the drying is 60-100° C. for 10-24 h.
[0025] According to another aspect of the present application, the present application also provides the application of the above-mentioned bimetallic olefin anti-corrosion coating for earth-covered tanks or the bimetallic olefin anti-corrosion coating for earth-covered tanks prepared by the above-mentioned preparation method in the field of anti-corrosion of earth-covered tanks.
[0026] Optionally, the method comprises uniformly spraying the bimetallic olefin anti-corrosion coating on the outer surface of the soil-covering tank, and the spraying thickness of the bimetallic olefin anti-corrosion coating is 20-50 um.
[0027] The beneficial effects of this application include but are not limited to:
[0028] 1. According to the bimetallic olefin anti-corrosion coating for earth-covered tanks of the present application, the bimetallic olefin anti-corrosion coating for earth-covered tanks is prepared by adding titanium dioxide and phenolic epoxy resin loaded with bimetallic olefin in a specific proportion, so that the bimetallic olefin is uniformly dispersed in the phenolic epoxy resin; the phenolic epoxy resin and the bimetallic olefin work together, and the addition of palladium-molybdenum bimetallic olefin makes the coating gather a large number of strongly reducing electrons on the surface of the earth-covered tank after being sprayed on the surface of the earth-covered tank, thereby enhancing the reducing property of the surface of the earth-covered tank, preventing oxidative corrosion, significantly improving the water resistance, acid resistance and alkali resistance of the earth-covered tank, while improving its mechanical properties and making the coating not easy to fall off.
[0029] 2. According to the bimetallic olefin anti-corrosion coating for earth-covered tanks of the present application, the present application selects environmentally friendly titanium dioxide loaded palladium-molybdenum bimetallic olefin, so that the palladium-molybdenum bimetallic olefin is evenly dispersed in the phenolic epoxy resin to obtain a uniform and stable bimetallic olefin anti-corrosion coating for earth-covered tanks; in addition, phenolic epoxy resin is common and easy to obtain, which is conducive to further controlling costs and facilitating promotion.
[0030] 3. According to the preparation method of the bimetallic olefin earth-covered tank anti-corrosion coating of the present application, the preparation steps are simple and easy to operate, the raw materials are easily available, it is green and pollution-free, and is conducive to large-scale promotion and utilization. DETAILED DESCRIPTION
[0031] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.
[0032] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. The reagents or raw materials used in the present invention can be purchased through conventional channels. Unless otherwise specified, the reagents or raw materials used in the present invention are used in a conventional manner in the art or in accordance with the product instructions. In addition, any method and material similar or equivalent to the described content can be applied to the method of the present invention. The preferred implementation methods and materials described in this patent are for demonstration purposes only.
[0033] Example 1
[0034] (1) Preparation of bimetallic olefins: 10 g of palladium acetate, 5 g of carbonyl molybdenum, 25 g of ascorbic acid and 500 g of an aqueous solution of 0.1 mol / L hexadecyltrimethylammonium bromide were mixed evenly, and reacted under continuous stirring and heating at a temperature of 100° C. for 24 h. After the reaction was completed, the palladium-molybdenum bimetallic olefin was obtained by centrifugation, washing with ethanol 5 times, and freeze-drying;
[0035] (2) Loading the bimetallic olefin on titanium dioxide: 1 g of the bimetallic olefin, 200 g of titanium dioxide and 200 g of an aqueous solution of 0.1 mol / L hexadecyltrimethylammonium bromide were mixed evenly, stirred for 24 h, centrifuged, washed with ethanol 5 times and dried at 100° C. for 24 h to obtain titanium dioxide loaded with the bimetallic olefin;
[0036] (3) 100 g of titanium dioxide loaded with bimetallic olefins was uniformly mixed with 5000 g of phenolic epoxy resin to obtain a bimetallic olefin anticorrosive coating for earth-covered tanks;
[0037] (4) The obtained bimetallic olefin anti-corrosion coating for the earth-covered tank is uniformly sprayed on the outer surface of the earth-covered tank with a spraying thickness of 50 um.
[0038] Example 2
[0039] (1) Preparation of bimetallic olefins: 10 g of palladium acetate, 8 g of carbonyl molybdenum, 30 g of ascorbic acid and 500 g of an aqueous solution of 0.1 mol / L hexadecyltrimethylammonium bromide were mixed evenly, and reacted under continuous stirring and heating at a temperature of 80° C. for 12 h. After the reaction was completed, the palladium-molybdenum bimetallic olefin was obtained by centrifugation, washing with ethanol 4 times, and freeze-drying;
[0040] (2) Loading the bimetallic olefin on titanium dioxide: 1 g of the bimetallic olefin, 180 g of titanium dioxide and 200 g of an aqueous solution of 0.1 mol / L hexadecyltrimethylammonium bromide were mixed evenly, stirred for 12 h, centrifuged, washed with ethanol 4 times and dried at 80° C. for 12 h to obtain titanium dioxide loaded with the bimetallic olefin;
[0041] (3) 100 g of titanium dioxide loaded with bimetallic olefins was uniformly mixed with 5000 g of phenolic epoxy resin to obtain a bimetallic olefin anticorrosive coating for earth-covered tanks;
[0042] (4) The obtained bimetallic olefin anti-corrosion coating for the earth-covered tank is uniformly sprayed on the outer surface of the earth-covered tank, and the spraying thickness is 45 um.
[0043] Example 3
[0044] (1) Preparation of bimetallic olefins: 10 g of palladium acetate, 6 g of carbonyl molybdenum, 26 g of ascorbic acid and 450 g of an aqueous solution of 0.1 mol / L didecyltrimethylammonium bromide were mixed evenly, and reacted under continuous stirring and heating at a temperature of 60° C. for 10 h. After the reaction was completed, the palladium-molybdenum bimetallic olefin was obtained by centrifugation, washing with ethanol three times, and freeze-drying;
[0045] (2) Loading the bimetallic olefin on titanium dioxide: 1 g of the bimetallic olefin, 50 g of titanium dioxide and 300 g of a 0.1 mol / L aqueous solution of hexadecyltrimethylammonium bromide were mixed evenly, stirred for 10 h, centrifuged, washed with ethanol three times and dried at 60° C. for 10 h to obtain titanium dioxide loaded with the bimetallic olefin;
[0046] (3) 50 g of titanium dioxide loaded with bimetallic olefins was mixed evenly with 1500 g of phenolic epoxy resin to obtain a bimetallic olefin anticorrosive coating for earth-covered tanks;
[0047] (4) The obtained bimetallic olefin anti-corrosion coating for the earth-covered tank is evenly sprayed on the outer surface of the earth-covered tank with a spraying thickness of 30 um.
[0048] Example 4
[0049] (1) Preparation of bimetallic olefins: 10 g of palladium acetate, 20 g of carbonyl molybdenum, 50 g of ascorbic acid and 1000 g of an aqueous solution of 0.1 mol / L hexadecyltrimethylammonium bromide were mixed evenly, and reacted under continuous stirring and heating at a temperature of 80° C. for 12 h. After the reaction was completed, the palladium-molybdenum bimetallic olefin was obtained by centrifugation, washing with ethanol 5 times, and freeze-drying;
[0050] (2) Loading the bimetallic olefin on titanium dioxide: 1 g of the bimetallic olefin, 50 g of titanium dioxide and 100 g of an aqueous solution of 0.1 mol / L hexadecyltrimethylammonium bromide were mixed evenly, stirred for 12 h, centrifuged, washed with ethanol 5 times and dried at 80° C. for 12 h to obtain titanium dioxide loaded with the bimetallic olefin;
[0051] (3) 50 g of titanium dioxide loaded with bimetallic olefins was uniformly mixed with 1000 g of phenolic epoxy resin to obtain a bimetallic olefin anticorrosive coating for earth-covered tanks;
[0052] (4) The obtained bimetallic olefin anti-corrosion coating for the earth-covered tank is evenly sprayed on the outer surface of the earth-covered tank with a spraying thickness of 20 μm.
[0053] Comparative Example 1
[0054] The difference between Comparative Example 1 and Example 2 is that palladium chloride is used instead of palladium acetate in step (1), and the rest are the same.
[0055] Comparative Example 2
[0056] The difference between Comparative Example 2 and Example 2 is that palladium-loaded titanium dioxide is used instead of bimetallic olefin-loaded titanium dioxide, and the rest are the same; the preparation method of palladium-loaded titanium dioxide comprises: mixing 1 g of palladium acetate, 180 g of titanium dioxide and 200 g of an aqueous solution of 0.1 mol / L hexadecyltrimethylammonium bromide, stirring for 12 hours, centrifuging, washing with ethanol 3 times and drying at 80°C for 12 hours to obtain palladium-loaded titanium dioxide.
[0057] Comparative Example 3
[0058] (1) Preparation of bimetallic olefins: 10 g of palladium acetate, 8 g of carbonyl molybdenum, 30 g of ascorbic acid and 500 g of an aqueous solution of 0.1 mol / L hexadecyltrimethylammonium bromide were mixed evenly, and reacted under continuous stirring and heating at a temperature of 80° C. for 12 h. After the reaction was completed, the palladium-molybdenum bimetallic olefin was obtained by centrifugation, washing with ethanol 4 times, and freeze-drying;
[0059] (2) 100 g of palladium-platinum bimetallic olefin and 5000 g of phenolic epoxy resin were mixed evenly to obtain a bimetallic olefin soil-covered tank anticorrosive coating;
[0060] (3) The obtained bimetallic olefin anti-corrosion coating of the earth-covered tank is evenly sprayed on the outer surface of the earth-covered tank, and the spraying thickness is 45um.
[0061] Comparative Example 4
[0062] The difference between Comparative Example 4 and Example 2 is that epoxy methacrylate replaces the phenolic epoxy resin, and the rest is the same.
[0063] Comparative Example 5
[0064] The difference between Comparative Example 5 and Example 2 is that step (3) is to mix 50g of titanium dioxide loaded with bimetallic olefins with 5000g of phenolic epoxy resin to obtain a bimetallic olefin anti-corrosion coating for earth-covered tanks; the rest are the same.
[0065] Experimental Example 1
[0066] The performance of the earth-covered tanks sprayed with anti-corrosion coatings obtained in Examples 1-5 and Comparative Examples 1-5 was tested, and the test results are shown in Table 1.
[0067] Table 1 Performance test results
[0068]
[0069]
[0070]
[0071] According to Table 1, the performance of Examples 1-4 of the present application is better than that of Comparative Examples 1-5, and Example 2 is the best example. The bimetallic olefin anticorrosion coating for earth-covered tanks provided in the present application and its preparation method and application can not only greatly improve the acid, alkali and water resistance of the earth-covered tanks, thereby improving the anticorrosion performance of the earth-covered tanks, but also improve the mechanical properties.
[0072] The above is only the embodiment of the present application, and the protection scope of the present application is not limited by these specific embodiments, but is determined by the claims of the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the technical ideas and principles of the present application should be included in the protection scope of the present application.
Claims
1. A bimetallic olefin anti-corrosion coating for earth-covered tanks, characterized in that: The invention comprises titanium dioxide loaded with bimetallic olefin and phenolic epoxy resin; the mass ratio of the titanium dioxide loaded with bimetallic olefin to the phenolic epoxy resin is 1:(20-50); and the bimetallic olefin is palladium-molybdenum bimetallic olefin.
2. The bimetallic olefin anti-corrosion coating for earth-covered tanks according to claim 1 is characterized in that: The palladium source of the palladium-platinum bimetallic olefin is palladium acetate.
3. The bimetallic olefin anti-corrosion coating for earth-covered tanks according to claim 2 is characterized in that: The preparation method of the palladium-platinum bimetallic olefin comprises the following steps: The aqueous solution of palladium acetate, carbonyl molybdenum, ascorbic acid and surfactant is evenly mixed and reacted under continuous stirring and heating. After the reaction is completed, the palladium-molybdenum bimetallic olefin is obtained after centrifugation, washing and freeze-drying.
4. The bimetallic olefin anti-corrosion coating for earth-covered tanks according to claim 3 is characterized in that: The mass ratio of the aqueous solution of palladium acetate, carbonyl molybdenum, ascorbic acid and surfactant is 1:(0.5-2): (1.5-5.0): (40-100); the surfactant is hexadecyltrimethylammonium bromide or didecyltrimethylammonium bromide.
5. The bimetallic olefin anti-corrosion coating for earth-covered tanks according to claim 3 is characterized in that: The reaction temperature is 60-100° C., and the reaction time is 10-24 hours. The washing is performed by washing with ethanol for 3-5 times. The concentration of the aqueous solution of the surfactant is 0.05-0.2 mol / L.
6. The method for preparing the bimetallic olefin anticorrosive coating for earth-covered tanks according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) preparing palladium-platinum bimetallic olefins; (2) Loading palladium-platinum bimetallic olefin on titanium dioxide: mixing palladium-platinum bimetallic olefin, titanium dioxide and an aqueous solution of a surfactant uniformly, stirring continuously, centrifuging, washing and drying to obtain titanium dioxide loaded with palladium-platinum bimetallic olefin; (3) Titanium dioxide loaded with palladium-molybdenum bimetallic olefins is uniformly mixed with phenolic epoxy resin to obtain a bimetallic olefin anti-corrosion coating for earth-covered tanks.
7. The method for preparing the bimetallic olefin anticorrosion coating for earth-covered tanks according to claim 6, characterized in that: In step (2), the mass ratio of the aqueous solution of palladium-platinum bimetallic olefin, titanium dioxide and surfactant is 1:(50-200):(100-300); the surfactant is hexadecyltrimethylammonium bromide or didecyltrimethylammonium bromide.
8. The method for preparing the bimetallic olefin anticorrosion coating for earth-covered tanks according to claim 6, characterized in that: In step (2), the concentration of the aqueous solution of the surfactant is 0.05-0.2 mol / L; the continuous stirring time is 10-24 hours; the washing is 3-5 times of ethanol washing; and the drying is 60-100° C. for 10-24 hours.
9. Use of the bimetallic olefin anti-corrosion coating for earth-covered tanks according to any one of claims 1 to 5 or the bimetallic olefin anti-corrosion coating for earth-covered tanks prepared by the preparation method according to any one of claims 6 to 8 in anti-corrosion of earth-covered tanks.
10. The use according to claim 9, characterized in that: The method comprises spraying the bimetallic olefin soil-covered tank anti-corrosion coating uniformly on the outer surface of the soil-covered tank; the spraying thickness of the bimetallic olefin soil-covered tank anti-corrosion coating is 20-50um.