Anticorrosive coating for chemical storage tank and preparation method of anticorrosive coating

Abstract

The invention belongs to the field of chemical corrosion prevention, and particularly discloses an anti-corrosion coating for a chemical storage tank and a preparation method of the anti-corrosion coating for the chemical storage tank, materials of the anti-corrosion coating comprise a primer material and a finish paint material, and the primer material comprises, by mass, 100 parts of epoxy resin; 10 to 20 parts of sorbitan monooleate; 4-8 parts of aluminum oxide; 1-3 parts of a coupling agent; 3 to 10 parts of a defoaming agent; 20 to 30 parts of a solvent; the finish paint is prepared from the following materials in parts by mass: 100 parts of epoxy resin; 5 to 15 parts of acrylic ester; 5 to 10 parts of basalt fiber powder; 2-4 parts of titanium dioxide; 0.5 to 5 parts of zirconium oxide; 2-4 parts of a coupling agent; 3 to 10 parts of a defoaming agent; 2-6 parts of a leveling agent; 25 to 35 parts of a solvent; the raw materials of the anti-corrosion coating are easy to obtain and low in cost, a complex preparation process is not needed, and the anti-corrosion coating is low in toxicity, environmentally friendly, good in anti-corrosion and anti-static effects and easy to use on a large scale.

Description

Technical Field

[0001] The invention belongs to the field of chemical corrosion protection, and specifically discloses an anti-corrosion coating for a chemical storage tank and a preparation method thereof. Background Art

[0002] In the corrosion protection of the inner wall of chemical storage tanks, traditional anti-corrosion materials are generally epoxy, chlorinated rubber, and fiberglass. Among them, epoxy coatings include high-solid powder coatings, water-based coatings, and powder coatings. The following disadvantages are common: ① Insufficient toughness, and it is very easy to crack under thermal stress or impact. ② The system contains organic solvents, which are harmful to the human body. ③ It is easy to cause static electricity accumulation, causing hidden dangers. In response to the above problems, CN201610570781.7 discloses a carbon nanomaterial composite conductive mica / epoxy-based electrostatic anti-corrosion coating material and preparation method, which is suitable for electrostatic corrosion protection of the inner wall of petrochemical storage tanks and oil and gas transmission pipelines. The primer raw materials of the coating material are: 100 parts of epoxy resin; 0.5-5 parts of epoxidized graphene; 20-30 parts of conductive mica; 0.5-5 parts of coupling agent; 5-15 parts of defoaming agent; and 15-30 parts of solvent; the topcoat raw materials are: 100 parts of epoxy resin; 0.5-3 parts of epoxidized carbon nanotubes; 20-30 parts of conductive mica; 0.5-5 parts of coupling agent; 5-15 parts of defoaming agent; 5-10 parts of leveling agent; and 15-30 parts of solvent. The preparation steps of the epoxidized carbon nanotubes are: (1) the carbon nanotubes and conductive mica treated with mixed acid are uniformly dispersed in butanol, low molecular weight epoxy resin TDE-85 is added, ultrasonic dispersion is performed for 1 hour, and the reaction is placed in a constant temperature high pressure reactor; (2) CO2 is injected into the reactor and the air is exhausted to make the CO2 in the reactor in a supercritical state; magnetic stirring is performed for 5 hours, and the supercritical CO2 in the reactor is slowly released to a normal pressure state to obtain epoxidized carbon nanotubes. Although the anti-corrosion coating prepared by the above invention is resistant to water and oil corrosion, and has a low surface resistivity, it is conducive to the formation of a conductive network and avoids the addition of a large amount of conductive fillers to damage the anti-corrosion and mechanical properties of the coating. However, the preparation of the above coating material is relatively complicated and requires the use of expensive raw materials, which is not conducive to the cost control of the product and cannot be applied on a large scale. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses an anti-corrosion coating for a chemical storage tank and a preparation method thereof.

[0004] The technical solution of the present invention is as follows:

[0005] An anti-corrosion coating material for chemical storage tanks, comprising a primer material and a topcoat material.

[0006] The mass proportion of the primer material is: 100 parts of epoxy resin; 10-20 parts of sorbitan monooleate; 4-8 parts of aluminum oxide; 1-3 parts of coupling agent; 3-10 parts of defoaming agent; 20-30 parts of solvent;

[0007] The mass proportions of the topcoat materials are: 100 parts of epoxy resin; 5-15 parts of acrylate; 5-10 parts of basalt fiber powder; 2-4 parts of titanium dioxide; 0.5-5 parts of zirconium oxide; 2-4 parts of coupling agent; 3-10 parts of defoaming agent; 2-6 parts of leveling agent; and 25-35 parts of solvent.

[0008] Furthermore, in the above-mentioned anti-corrosion coating material for chemical storage tanks, the epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin.

[0009] Furthermore, in the above-mentioned anti-corrosion coating material for chemical storage tanks, the basalt fiber powder is obtained by grinding basalt fiber until it passes through a 200-mesh sieve.

[0010] Furthermore, in the above-mentioned anti-corrosion coating material for chemical storage tanks, the coupling agent is a silane coupling agent.

[0011] Furthermore, in the above-mentioned anti-corrosion coating material for chemical storage tanks, the defoaming agent is polyether-modified silicone oil.

[0012] Furthermore, in the above-mentioned anti-corrosion coating material for chemical storage tanks, the leveling agent is an acrylic leveling agent.

[0013] Furthermore, in the above-mentioned anti-corrosion coating material for chemical storage tanks, the solvent is a mixture of turpentine and ethyl acetate.

[0014] Furthermore, the present invention discloses a method for preparing the above-mentioned anti-corrosion coating material for chemical storage tanks, comprising the following steps:

[0015] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 80-90° C., then adding coupling agent and defoaming agent, mechanically stirring at 80-90° C., and obtaining the primer.

[0016] The preparation method of the topcoat is: firstly taking epoxy resin, acrylate, basalt fiber powder, titanium dioxide, zirconium oxide and solvent into a three-necked flask according to the ingredients, mechanically stirring at a temperature of 80-90° C., then adding coupling agent, leveling agent and defoaming agent, mechanically stirring at a temperature of 80-90° C., and obtaining the topcoat.

[0017] The invention also discloses an anti-corrosion coating for a chemical storage tank, which is prepared from the above-mentioned anti-corrosion coating material for a chemical storage tank.

[0018] The present invention also discloses that the chemical storage tank is made of steel and is used to store liquefied petroleum gas, and the anti-corrosion coating is prepared by the following steps:

[0019] When in use, take the curing agent and mix it evenly with the epoxy resin in the paint in a mass ratio of 0.3-0.5:1. The primer and the topcoat are applied to the cleaned and sandblasted steel material surface in sequence, and dried naturally or cured at 70-80°C for 3-6h to obtain an anti-corrosion coating; preferably, the steel material is Q345R, the primer thickness is 40-100μm, and the topcoat thickness is 20-30μm.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The raw materials of the anti-corrosion coating material of the present invention are easily available, the raw material cost is low, the preparation method is simple, and after spraying, it is tightly bonded to the inner surface of the chemical storage tank, the construction is convenient, the construction cost is low, the coating surface has good impact resistance, corrosion resistance and oil resistance, and at the same time has low surface resistance and anti-static ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Comparison results of neutral salt spray test (h) of Examples 1-3 and Comparative Examples 1-5;

[0023] Figure 2 Comparison results of iron ion concentration (μg / mL) in acid immersion of Examples 1-3 and Comparative Examples 1-5;

[0024] Figure 3 Comparison results of impact resistance (kg.cm) of Examples 1-3 and Comparative Examples 1-5;

[0025] Figure 4 Surface resistivity (x10 6 Ω) Comparison results;

[0026] Figure 5 Comparison results of adhesion (Mpa) of Examples 1-3 and Comparative Examples 1-5. DETAILED DESCRIPTION

[0027] An anti-corrosion coating material for chemical storage tanks,

[0028] Including primer materials and topcoat materials,

[0029] The mass proportion of the primer material is: 100 parts of epoxy resin; 10-20 parts of sorbitan monooleate; 4-8 parts of aluminum oxide; 1-3 parts of coupling agent; 3-10 parts of defoaming agent; 20-30 parts of solvent;

[0030] The mass proportions of the topcoat materials are: 100 parts of epoxy resin; 5-15 parts of acrylate; 5-10 parts of basalt fiber powder; 2-4 parts of titanium dioxide; 0.5-5 parts of zirconium oxide; 2-4 parts of coupling agent; 3-10 parts of defoaming agent; 2-6 parts of leveling agent; and 25-35 parts of solvent.

[0031] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0032] The basalt fiber powder is obtained by grinding basalt fiber to pass through a 200-mesh sieve;

[0033] The coupling agent is a silane coupling agent;

[0034] The leveling agent is an acrylic leveling agent;

[0035] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0036] The preparation method of the above material comprises the following steps:

[0037] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0038] The preparation method of the topcoat is: firstly take epoxy resin, acrylate, basalt fiber powder, titanium dioxide, zirconium oxide and solvent into a three-necked flask according to the ingredients, mechanically stir at 85°C, then add coupling agent, leveling agent and defoaming agent, mechanically stir at 85°C to obtain the topcoat.

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The reagents or instruments used in the examples of the present invention without indicating the manufacturer are all conventional reagent products that can be obtained through commercial purchase.

[0041] Basalt fiber: purchased from Shandong Tonghui Glass Fiber Co., Ltd., specification 6mm;

[0042] Epoxy resin: purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd. CAS: 25068-38-6 Epoxy Resin 1001;

[0043] Coupling agent: epoxy silane coupling agent KH-560 purchased from Nanjing Xuanhao New Material Technology Co., Ltd.;

[0044] Leveling agent: BYK381 acrylic leveling agent purchased from Guangzhou Haoliangda International Trade Co., Ltd.;

[0045] Curing agent: Epoxy resin high temperature toughening curing agent SH-200-201 purchased from Guangzhou Xinxi Metallurgical Chemical Co., Ltd.

[0046] Defoaming agent: MSD-916 polyether modified silicone oil purchased from Qingdao Meiside Silicone Co., Ltd.

[0047] Acrylate: PRIMAL TR407 from Dow.

[0048] Example 1

[0049] An anti-corrosion coating material for chemical storage tanks,

[0050] Including primer materials and topcoat materials,

[0051] The mass proportion of the primer material is: 100 parts of epoxy resin; 10 parts of sorbitan monooleate; 4 parts of aluminum oxide; 1 part of coupling agent; 3 parts of defoamer; and 20 parts of solvent.

[0052] The mass proportion of the topcoat materials is: 100 parts of epoxy resin; 5 parts of acrylate; 5 parts of basalt fiber powder; 2 parts of titanium dioxide; 0.5 parts of zirconium oxide; 2 parts of coupling agent; 3 parts of defoaming agent; 2 parts of leveling agent; and 25 parts of solvent.

[0053] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0054] The basalt fiber powder is obtained by grinding basalt fiber to pass through a 200-mesh sieve;

[0055] The coupling agent is a silane coupling agent;

[0056] The leveling agent is an acrylic leveling agent;

[0057] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0058] The preparation method of the above material comprises the following steps:

[0059] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0060] The preparation method of the topcoat is: firstly take epoxy resin, acrylate, basalt fiber powder, titanium dioxide, zirconium oxide and solvent into a three-necked flask according to the ingredients, mechanically stir at 85°C, then add coupling agent, leveling agent and defoaming agent, mechanically stir at 85°C to obtain the topcoat.

[0061] Example 2

[0062] An anti-corrosion coating material for chemical storage tanks,

[0063] Including primer materials and topcoat materials,

[0064] The mass proportion of the primer material is: 100 parts of epoxy resin; 15 parts of sorbitan monooleate; 6 parts of aluminum oxide; 2 parts of coupling agent; 8 parts of defoamer; and 25 parts of solvent.

[0065] The mass proportion of the topcoat materials is: 100 parts of epoxy resin; 10 parts of acrylate; 8 parts of basalt fiber powder; 3 parts of titanium dioxide; 3 parts of zirconium oxide; 3 parts of coupling agent; 8 parts of defoaming agent; 4 parts of leveling agent; and 30 parts of solvent.

[0066] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0067] The basalt fiber powder is obtained by grinding basalt fiber to pass through a 200-mesh sieve;

[0068] The coupling agent is a silane coupling agent;

[0069] The leveling agent is an acrylic leveling agent;

[0070] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0071] The preparation method of the above material comprises the following steps:

[0072] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0073] The preparation method of the topcoat is: firstly take epoxy resin, acrylate, basalt fiber powder, titanium dioxide, zirconium oxide and solvent into a three-necked flask according to the ingredients, mechanically stir at 85°C, then add coupling agent, leveling agent and defoaming agent, mechanically stir at 85°C to obtain the topcoat.

[0074] Example 3

[0075] An anti-corrosion coating material for chemical storage tanks,

[0076] Including primer materials and topcoat materials,

[0077] The mass proportion of the primer material is: 100 parts of epoxy resin; 20 parts of sorbitan monooleate; 8 parts of alumina; 3 parts of coupling agent; 10 parts of defoamer; and 30 parts of solvent.

[0078] The mass proportion of the topcoat materials is: 100 parts of epoxy resin; 15 parts of acrylate; 10 parts of basalt fiber powder; 4 parts of titanium dioxide; 5 parts of zirconium oxide; 4 parts of coupling agent; 10 parts of defoaming agent; 6 parts of leveling agent; and 35 parts of solvent.

[0079] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0080] The basalt fiber powder is obtained by grinding basalt fiber to pass through a 200-mesh sieve;

[0081] The coupling agent is a silane coupling agent;

[0082] The leveling agent is an acrylic leveling agent;

[0083] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0084] The preparation method of the above material comprises the following steps:

[0085] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0086] The preparation method of the topcoat is: firstly take epoxy resin, acrylate, basalt fiber powder, titanium dioxide, zirconium oxide and solvent into a three-necked flask according to the ingredients, mechanically stir at 85°C, then add coupling agent, leveling agent and defoaming agent, mechanically stir at 85°C to obtain the topcoat.

[0087] Comparative Example 1

[0088] An anti-corrosion coating material for chemical storage tanks,

[0089] The mass proportion of the primer material is: 100 parts of epoxy resin; 6 parts of alumina; 2 parts of coupling agent; 8 parts of defoaming agent; and 25 parts of solvent.

[0090] The mass proportion of the topcoat materials is: 100 parts of epoxy resin; 10 parts of acrylate; 8 parts of basalt fiber powder; 3 parts of titanium dioxide; 3 parts of zirconium oxide; 3 parts of coupling agent; 8 parts of defoaming agent; 4 parts of leveling agent; and 30 parts of solvent.

[0091] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0092] The basalt fiber powder is obtained by grinding basalt fiber to pass through a 200-mesh sieve;

[0093] The coupling agent is a silane coupling agent;

[0094] The leveling agent is an acrylic leveling agent;

[0095] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0096] The preparation method of the above material comprises the following steps:

[0097] The preparation steps of the primer are: firstly taking epoxy resin, aluminum oxide and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0098] The preparation method of the topcoat is: firstly take epoxy resin, acrylate, basalt fiber powder, titanium dioxide, zirconium oxide and solvent into a three-necked flask according to the ingredients, mechanically stir at 85°C, then add coupling agent, leveling agent and defoaming agent, mechanically stir at 85°C to obtain the topcoat.

[0099] The primer in this comparative example does not contain sorbitan monooleate, and the rest is the same as in Example 2.

[0100] Comparative Example 2

[0101] An anti-corrosion coating material for chemical storage tanks,

[0102] Including primer materials and topcoat materials,

[0103] The mass proportion of the primer material is: 100 parts of epoxy resin; 15 parts of sorbitan monooleate; 6 parts of aluminum oxide; 2 parts of coupling agent; 8 parts of defoamer; and 25 parts of solvent.

[0104] The mass proportion of the topcoat materials is: 100 parts of epoxy resin; 3 parts of zirconium oxide; 3 parts of coupling agent; 8 parts of defoaming agent; 4 parts of leveling agent; and 30 parts of solvent.

[0105] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0106] The coupling agent is a silane coupling agent;

[0107] The leveling agent is an acrylic leveling agent;

[0108] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0109] The preparation method of the above material comprises the following steps:

[0110] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0111] The preparation method of the topcoat is as follows: firstly, epoxy resin, zirconium oxide and solvent are put into a three-necked flask according to the ingredients, mechanically stirred at 85° C., then coupling agent, leveling agent and defoaming agent are added, mechanically stirred at 85° C., and the topcoat is obtained.

[0112] This comparative example does not contain acrylate, basalt fiber powder and titanium dioxide.

[0113] Comparative Example 3

[0114] An anti-corrosion coating material for chemical storage tanks,

[0115] Including primer materials and topcoat materials,

[0116] The mass proportion of the primer material is: 100 parts of epoxy resin; 15 parts of sorbitan monooleate; 6 parts of aluminum oxide; 2 parts of coupling agent; 8 parts of defoamer; and 25 parts of solvent.

[0117] The mass proportion of the topcoat materials is: 100 parts of epoxy resin; 3 parts of titanium dioxide; 3 parts of zirconium oxide; 3 parts of coupling agent; 8 parts of defoaming agent; 4 parts of leveling agent; and 30 parts of solvent.

[0118] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0119] The coupling agent is a silane coupling agent;

[0120] The leveling agent is an acrylic leveling agent;

[0121] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0122] The preparation method of the above material comprises the following steps:

[0123] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0124] The preparation method of the topcoat is as follows: firstly, epoxy resin, titanium dioxide, zirconium oxide and solvent are put into a three-necked flask according to the ingredients, mechanically stirred at 85° C., then coupling agent, leveling agent and defoaming agent are added, mechanically stirred at 85° C., and the topcoat is obtained.

[0125] This comparative example does not contain acrylic acid ester and basalt fiber powder.

[0126] Comparative Example 4

[0127] An anti-corrosion coating material for chemical storage tanks,

[0128] Including primer materials and topcoat materials,

[0129] The mass proportion of the primer material is: 100 parts of epoxy resin; 15 parts of sorbitan monooleate; 6 parts of aluminum oxide; 2 parts of coupling agent; 8 parts of defoamer; and 25 parts of solvent.

[0130] The mass proportion of the topcoat materials is: 100 parts of epoxy resin; 10 parts of acrylate; 3 parts of titanium dioxide; 3 parts of zirconium oxide; 3 parts of coupling agent; 8 parts of defoaming agent; 4 parts of leveling agent; and 30 parts of solvent.

[0131] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0132] The coupling agent is a silane coupling agent;

[0133] The leveling agent is an acrylic leveling agent;

[0134] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0135] The preparation method of the above material comprises the following steps:

[0136] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0137] The preparation method of the topcoat is as follows: firstly, epoxy resin, acrylate, titanium dioxide, zirconium oxide and solvent are put into a three-necked flask according to the ingredients, mechanically stirred at 85° C., then coupling agent, leveling agent and defoaming agent are added, mechanically stirred at 85° C., and the topcoat is obtained.

[0138] This comparative example does not contain basalt fiber powder.

[0139] Comparative Example 5

[0140] An anti-corrosion coating material for chemical storage tanks,

[0141] Including primer materials and topcoat materials,

[0142] The mass proportion of the primer material is: 100 parts of epoxy resin; 15 parts of sorbitan monooleate; 6 parts of aluminum oxide; 2 parts of coupling agent; 8 parts of defoamer; and 25 parts of solvent.

[0143] The mass proportion of the topcoat materials is: 100 parts of epoxy resin; 8 parts of basalt fiber powder; 3 parts of titanium dioxide; 3 parts of zirconium oxide; 3 parts of coupling agent; 8 parts of defoaming agent; 4 parts of leveling agent; and 30 parts of solvent.

[0144] The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin;

[0145] The basalt fiber powder is obtained by grinding basalt fiber to pass through a 200-mesh sieve;

[0146] The coupling agent is a silane coupling agent;

[0147] The leveling agent is an acrylic leveling agent;

[0148] The solvent is a mixture of turpentine and ethyl acetate in a mass ratio of 1:2;

[0149] The preparation method of the above material comprises the following steps:

[0150] The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 85° C., then adding coupling agent and defoaming agent, mechanically stirring at 85° C., and obtaining the primer.

[0151] The preparation method of the topcoat is: firstly take epoxy resin, basalt fiber powder, titanium dioxide, zirconium oxide and solvent into a three-necked flask according to the ingredients, mechanically stir at 85°C, then add coupling agent, leveling agent and defoaming agent, mechanically stir at 85°C to obtain the topcoat.

[0152] The topcoat of this comparative example does not contain acrylate.

[0153] Test Case

[0154] The anti-corrosion coatings were prepared from the coating materials of Examples 1-3 and Comparative Examples 1-5 by the following steps:

[0155] When using, take the curing agent and mix it evenly with the epoxy resin in the paint in a mass ratio of 0.4:1. Apply the primer and topcoat in sequence on the cleaned and sandblasted steel material surface, and dry it naturally for 24 hours to obtain the anti-corrosion coating.

[0156] The steel material is Q345R, the primer thickness is 50μm, and the topcoat thickness is 25μm.

[0157] (1) Anti-corrosion and anti-rust test

[0158] The conventional neutral salt spray test, acid immersion test, and HGT3343-1985 paint film oil resistance determination method were used to investigate its anti-rust and oil resistance effects. The results are shown in Table 1 and Figure 1-2 shown.

[0159] Table 1 Antirust Test

[0160]

[0161] It can be seen from the test data in Table 1 that the implementation of 1-3 and comparative example 1, the raw materials contain acrylate, basalt fiber powder and titanium dioxide, so that the prepared coating has excellent anti-corrosion and oil resistance. Comparative documents 2-5 lack corresponding raw materials, resulting in a significant decrease in anti-corrosion and oil resistance.

[0162] (2) Impact resistance, surface resistivity and adhesion test

[0163] Adhesion refers to GBT5210-2006, the results are shown in Table 2 and Figure 3-5 shown.

[0164] Table 2 Impact resistance, surface resistivity and adhesion

[0165]

[0166] From the comparison of the test performance of Comparative Example 1 and Examples 1-3 in Table 2, it can be seen that adding sorbitan monooleate to the primer formula can greatly increase the adhesion of the primer to the steel material. From the comparison of the data of Comparative Examples 2-5 and Examples 1-3, it can be seen that adding titanium dioxide can greatly improve the antistatic ability, and adding a combination of acrylate, basalt fiber powder and titanium dioxide can increase the impact resistance of the coating.

[0167] It can be seen from the above embodiments and test examples that the raw materials of the anti-corrosion coating material of the present invention are easily available, the raw material cost is low, the preparation method is simple, and after spraying, it is tightly bonded to the inner surface of the chemical storage tank, the construction is convenient, the construction cost is low, the coating surface has good impact resistance, good corrosion resistance and oil resistance, and at the same time has low surface resistance and anti-static ability.

[0168] The above are only a few preferred embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An anti-corrosion coating material for chemical storage tanks, characterized in that: Including primer materials and topcoat materials, The mass proportion of the primer material is: 100 parts of epoxy resin; 10-20 parts of sorbitan monooleate; 4-8 parts of aluminum oxide; 1-3 parts of coupling agent; 3-10 parts of defoaming agent; 20-30 parts of solvent; The mass proportion of the topcoat material is: 100 parts of epoxy resin; 5-15 parts of acrylate; 5-10 parts of basalt fiber powder; 2-4 parts of titanium dioxide; 0.5-5 parts of zirconium oxide; 2-4 parts of coupling agent; 3-10 parts of defoaming agent; 2-6 parts of leveling agent; and 25-35 parts of solvent.

2. The anti-corrosion coating material for chemical storage tanks according to claim 1, characterized in that: The epoxy resin is a bisphenol A-epichlorohydrin type epoxy resin.

3. The anti-corrosion coating material for chemical storage tanks according to claim 1, characterized in that: The basalt fiber powder is obtained by grinding basalt fiber to pass through a 200-mesh sieve.

4. The anti-corrosion coating material for chemical storage tanks according to claim 1, characterized in that: The coupling agent is a silane coupling agent.

5. The anti-corrosion coating material for chemical storage tanks according to claim 1, characterized in that: The defoamer is polyether modified silicone oil.

6. The anti-corrosion coating material for chemical storage tanks according to claim 1, characterized in that: The leveling agent is an acrylic leveling agent.

7. The anti-corrosion coating material for chemical storage tanks according to claim 1, characterized in that: The solvent is a mixture of turpentine and ethyl acetate.

8. The method for preparing the anticorrosive coating material for chemical storage tanks according to any one of claims 1 to 7, characterized in that: The following steps are involved: The preparation steps of the primer are: firstly taking epoxy resin, sorbitan monooleate, alumina and solvent into a three-necked flask according to the ingredients, mechanically stirring at 80-90° C., then adding coupling agent and defoaming agent, mechanically stirring at 80-90° C., and obtaining the primer. The preparation method of the topcoat is: firstly taking epoxy resin, acrylate, basalt fiber powder, titanium dioxide, zirconium oxide and solvent into a three-necked flask according to the ingredients, mechanically stirring at a temperature of 80-90° C., then adding coupling agent, leveling agent and defoaming agent, mechanically stirring at a temperature of 80-90° C., and obtaining the topcoat.

9. An anti-corrosion coating for a chemical storage tank, characterized in that: Prepared from the anti-corrosion coating material for chemical storage tanks as described in any one of claims 1 to 7.

10. Use of the anti-corrosion coating according to claim 9 in the internal anti-corrosion of a liquefied petroleum gas storage tank, characterized in that: The anti-corrosion coating is prepared by the following steps: When using, take the curing agent and mix it evenly with the epoxy resin in the paint in a mass ratio of 0.3-0.5:

1. Apply the primer and topcoat in sequence on the cleaned and sandblasted steel material surface, dry it naturally or cure it at 70-80℃ for 3-6h to obtain the anti-corrosion coating.

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