Corrosion-resistant environment-friendly coating as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of coatings, and particularly relates to a corrosion-resistant environment-friendly coating as well as a preparation method and application thereof. The environment-friendly coating comprises the following raw materials: 120-140 parts of epoxy resin; 60-70 parts of a curing agent; 1 to 3 parts of a PANI / TiO2 / MgAl-LDH composite material; 2 to 4 parts of L-cysteine modified basalt flakes; 15 to 25 parts of filler; and 10-20 parts of water. By preparing the PANI / TiO2 / MgAl-LDH composite material and the L-cysteine modified basalt scales, the corrosion resistance of the ship can be effectively improved, and meanwhile, the ship has excellent adhesive force and other properties.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings. More specifically, it relates to a corrosion-resistant and environmentally friendly coating, its preparation method and application. Background Art

[0002] Since there are countless organisms in the ocean, and their massive attachment (such as on ship hulls, offshore platforms, submarine pipelines and corresponding submarine structures) will seriously affect the application and service life of the structures. For example, when attached to the ship hull, it will bring great harm to the ship, not only increasing the ship's own weight, reducing the ship's load capacity, but also increasing the resistance of the ship hull, resulting in a decrease in the ship's speed and an increase in fuel consumption. It will also damage the protective paint film and corrode the steel plate. Marine fouling brings great harm to ships and all sea facilities, and is extremely harmful to national defense, shipping, coastal factories, cooling systems of coastal structures and the aquaculture industry.

[0003] Currently, the anti-corrosion of the ocean at home and abroad mainly relies on organic coatings. Using conventional anti-corrosion coatings for ocean anti-corrosion protection, but its impermeability is poor and the protection life is short.

[0004] CN119842318A discloses a water-resistant and anti-corrosion type fireproof coating and its preparation method, which contains the following components and parts by weight: 60 - 80 parts of organic-inorganic hybrid resin, 20 - 30 parts of microencapsulated ammonium polyphosphate, 10 - 15 parts of pentaerythritol / montmorillonite complex, 6 - 9 parts of nano-ZnFe₂O₄, 3 - 7 parts of calcium ion-modified silica microspheres, 0.3 - 0.6 parts of wetting agent, and 3 - 5 parts of propanol. A hydrophobic network is constructed through the organic-inorganic hybrid base material, and nano-zinc ferrite and calcium ion-modified silica microspheres are used synergistically for anti-corrosion, and the microencapsulation technology is used to synergistically regulate the decomposition kinetics of the pentaerythritol / montmorillonite complex. The product has no rust spots after 20 days of high-temperature brine immersion, the water contact angle ≥ 86°, and the fire-resistant temperature is improved compared with the commercially available products, and it is suitable for harsh environments such as ships and offshore platforms.

[0005] CN119823618A discloses a preparation method of a fully enclosed connection paint for the hull below the waterline of a ship. The method includes the following steps: A1. Mix glass fiber and base material; A2. Add hydroxyethyl cellulose ether, propylene glycol, n-butanol and m-xylene; A3. Add titanium dioxide and iron oxide red; A4. Add silicone resin emulsion and ordinary emulsion; A5. Add polydimethylsiloxane and thickener; A6. Finally add defoaming agent. Each step has specific proportions and mixing conditions to ensure the quality and performance of the coating. The fully enclosed connection paint can reduce the chemical corrosion and electrochemical corrosion of the ship hull and extend the service life of the ship.

[0006] CN119775851A An antibacterial and anticorrosive composition, its preparation method and application. The antibacterial and anticorrosive composition includes a copper / graphene composite material, an epoxy resin, a film-forming aid, an organic solvent, a filler and a curing agent, and is an antibacterial and anticorrosive coating. The antibacterial and anticorrosive composition has good film-forming properties and can be cured at room temperature. The cured paint film has strong adhesion, good flexibility, strong impact resistance, good salt spray resistance, good corrosion resistance to 3.5% NaCl solution, and good antibacterial property, solving the problem of insufficient protection performance of existing epoxy heavy-duty anticorrosive coatings, and can be used as an antibacterial and anticorrosive coating in fields including but not limited to marine ships, coastal infrastructure, petroleum, chemical industry, electric power, automobiles, etc.

[0007] By adding corrosion-resistant materials to the coating, the corrosion resistance of ships can be effectively improved. Based on the above content, the present invention provides a corrosion-resistant and environmentally friendly coating, which can effectively improve the corrosion resistance of ships and also has excellent adhesion. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the prior art and provide a corrosion-resistant and environmentally friendly coating and its preparation method and application. The raw materials of the environmentally friendly coating include: 120 - 140 parts of epoxy resin; 60 - 70 parts of curing agent; 1 - 3 parts of PANI / TiO2 / MgAl-LDH composite material; 2 - 4 parts of L-cysteine-modified basalt scales; 15 - 25 parts of filler; 10 - 20 parts of water. By preparing the PANI / TiO2 / MgAl-LDH composite material and L-cysteine-modified basalt scales, the corrosion resistance of ships can be effectively improved, and at the same time, it also has excellent adhesion and other properties.

[0009] The purpose of the present invention is to provide a corrosion-resistant and environmentally friendly coating.

[0010] Another purpose of the present invention is to provide a preparation method of a corrosion-resistant and environmentally friendly coating.

[0011] Another purpose of the present invention is to provide an application of a corrosion-resistant and environmentally friendly coating in the field of ship anti-corrosion.

[0012] The above purposes of the present invention are achieved by the following technical solutions:

[0013] A corrosion-resistant and environmentally friendly coating, by weight, the raw materials of the environmentally friendly coating include:

[0014]

[0015] Further, the epoxy resin is a water-based epoxy resin, and the curing agent is a water-based curing agent; the filler includes: a film-forming aid, an antifoaming agent, a dispersant and a leveling agent.

[0016] Further, the preparation method of the PANI / TiO2 / MgAl-LDH composite material comprises the following steps:

[0017] (1) Disperse nano-TiO2 and ethylenediamine into deionized water, stir, filter, wash, and dry to constant weight to obtain ethylenediamine-modified nano-TiO2.

[0018] (2) Ultrasonically disperse the ethylenediamine-modified nano-TiO2, magnesium salt, and aluminum salt obtained in step (1) into deionized water, then add urea, stir, and then carry out a hydrothermal reaction, filter, wash, and dry to constant weight to obtain TiO2 / MgAl-LDH.

[0019] (3) Add ammonium persulfate to the hydrochloric acid solution and stir evenly, then add the TiO2 / MgAl-LDH and aniline obtained in step (2), and stir and react at room temperature, filter, wash, and dry to constant weight to obtain the PANI / TiO2 / MgAl-LDH composite material.

[0020] Preferably, in step (1), the ratio of the nano-TiO2 to ethylenediamine is 1 g: 10-20 mL, the stirring time is 30-50 min, and the drying temperature is 60-80 °C.

[0021] Preferably, in step (2), the magnesium salt is one of magnesium nitrate, magnesium chloride, and magnesium sulfate, the aluminum salt is one of aluminum nitrate, aluminum chloride, and aluminum acetate, and the ratio of the ethylenediamine-modified nano-TiO2, magnesium salt, aluminum salt, and urea is: 10 mg: 2-4 mol: 1 mol: 5-7 mol; the stirring time is 20-30 min; the hydrothermal reaction conditions are hydrothermal reaction at 120-160 °C for 6-12 h; the drying temperature is 60-80 °C.

[0022] Preferably, in step (3), the concentration of the hydrochloric acid is 1 mol / L; the ratio of the TiO2 / MgAl-LDH, aniline, ammonium persulfate, and hydrochloric acid solution is: 30 g: 20-40 g: 60-80 g: 1 L; the stirring reaction time is 12-18 h, and the drying temperature is 60-80 °C.

[0023] Further, the preparation method of the L-cysteine-modified basalt scales comprises the following steps:

[0024] Add basalt scales and L-cysteine to deionized water, ultrasonically disperse, and then stir and react at room temperature under a nitrogen atmosphere, filter, wash, and dry to constant weight to obtain L-cysteine-modified basalt scales.

[0025] Preferably, the time for ultrasonic dispersion is 3 - 9 min; the time for stirring reaction is 18 - 26 h; the drying temperature is 60 - 80 °C; the mass ratio of basalt flakes to L-cysteine is 1:1 - 2.

[0026] Based on the above-mentioned preparation method of a corrosion-resistant and environmentally friendly coating, the preparation method includes the following steps:

[0027] Add the PANI / TiO2 / MgAl-LDH composite material and L-cysteine-modified basalt flakes into water, stir at a high speed for 20 - 40 min, with a stirring speed of 3000 - 4000 r / min, then add epoxy resin and fillers, and stir at a speed of 300 - 500 r / min for 10 - 30 min. Finally, add a curing agent to obtain a corrosion-resistant and environmentally friendly coating.

[0028] Based on the above-mentioned application of a corrosion-resistant and environmentally friendly coating in the field of ship anti-corrosion.

[0029] The present invention has the following beneficial effects:

[0030] In the present invention, TiO2 is added during the preparation of hydrotalcite. Since TiO2 can generate photoelectrons and holes, the electrons separated from the holes are transferred to the metal base, reducing the loss of electrons by the metal and preventing electrochemical corrosion. PANI reacts with the metal to form an iron oxide passivation film on the metal surface, inhibiting the entry of corrosive media and effectively enhancing the anti-corrosion ability of the coating. Modifying basalt flakes with L-cysteine can improve the dispersion of basalt flakes in the coating, increase the compactness of the coating, and thus make it difficult for corrosive media to pass through the coating, thereby improving the corrosion resistance of the ship. That is, the corrosion-resistant and environmentally friendly coating prepared by the present invention has excellent performance and good application prospects in ship corrosion resistance. Specific Embodiments

[0031] The following specific examples are used to further illustrate the present invention, but the examples do not limit the present invention in any form. Unless otherwise specified, the reagents, methods, and equipment used in the present invention are conventional reagents, methods, and equipment in the technical field.

[0032] Waterborne epoxy resin F0704; waterborne curing agent F0705; the fillers include: film-forming auxiliary agent (butyl benzyl alcohol acetate), defoaming agent (BYK065), dispersant (octadecyl dimethyl betaine), and leveling agent (BYK310), and the mass ratio of the film-forming auxiliary agent, defoaming agent, dispersant, and leveling agent is 2:1:1:1.

[0033] Unless otherwise specified, the reagents and materials used in the following examples are all commercially available.

[0034] Example 1

[0035] A corrosion-resistant environmental protection coating. By weight, the raw materials of the environmental protection coating include:

[0036] 130 parts of epoxy resin;

[0037] 65 parts of curing agent;

[0038] 2 parts of PANI / TiO2 / MgAl-LDH composite material;

[0039] 3 parts of L-cysteine modified basalt flakes;

[0040] 20 parts of filler;

[0041] 15 parts of water.

[0042] The preparation method of the PANI / TiO2 / MgAl-LDH composite material includes the following steps:

[0043] (1) Disperse 1 g of nano-TiO2 and 15 mL of ethylenediamine into 150 mL of deionized water, stir for 40 min, filter, wash, and dry at 70 °C to constant weight to obtain ethylenediamine-modified nano-TiO2;

[0044] (2) Ultrasonically disperse 10 mg of the ethylenediamine-modified nano-TiO2 obtained in step (1), 3 mol of magnesium nitrate and 1 mol of aluminum chloride into 200 mL of deionized water, then add 6 mol of urea, stir for 25 min, and then carry out a hydrothermal reaction at 140 °C for 10 h, filter, wash, and dry at 70 °C to constant weight to obtain TiO2 / MgAl-LDH;

[0045] (3) Add 70 g of ammonium persulfate to 1 L of hydrochloric acid solution and stir evenly. The concentration of the hydrochloric acid is 1 mol / L, then add 30 g of the TiO2 / MgAl-LDH obtained in step (2) and 30 g of aniline, stir and react at room temperature for 16 h, filter, wash, and dry at 70 °C to constant weight to obtain the PANI / TiO2 / MgAl-LDH composite material.

[0046] The preparation method of the L-cysteine modified basalt flakes includes the following steps:

[0047] Add 10 g of basalt flakes and 15 g of L-cysteine to 200 mL of deionized water, ultrasonically disperse for 6 min, and then stir and react at room temperature under a nitrogen atmosphere for 22 h, filter, wash, and dry at 70 °C to constant weight to obtain L-cysteine modified basalt flakes.

[0048] A preparation method of a corrosion-resistant environmental protection coating includes the following steps:

[0049] Add the PANI / TiO2 / MgAl-LDH composite material and L-cysteine-modified basalt scales to water, stir at high speed for 30 min at a stirring speed of 3500 r / min, then add epoxy resin and fillers, and stir for 20 min at a speed of 400 r / min. Finally, add a curing agent to obtain a corrosion-resistant environmental protection coating.

[0050] Example 2

[0051] A corrosion-resistant environmental protection coating, by weight, the raw materials of the environmental protection coating include:

[0052] 140 parts of epoxy resin;

[0053] 70 parts of curing agent;

[0054] 3 parts of PANI / TiO2 / MgAl-LDH composite material;

[0055] 2 parts of L-cysteine-modified basalt scales;

[0056] 25 parts of filler;

[0057] 20 parts of water.

[0058] The preparation method of the PANI / TiO2 / MgAl-LDH composite material includes the following steps:

[0059] (1) Disperse 1 g of nano-TiO2 and 20 mL of ethylenediamine into 150 mL of deionized water, stir for 50 min, filter, wash, and dry at 80 °C to constant weight to obtain ethylenediamine-modified nano-TiO2;

[0060] (2) Ultrasonically disperse 10 mg of the ethylenediamine-modified nano-TiO2 obtained in step (1), 4 mol of magnesium chloride, and 1 mol of aluminum acetate into 200 mL of deionized water, then add 7 mol of urea, stir for 30 min, and then carry out a hydrothermal reaction at 160 °C for 6 h, filter, wash, and dry at 80 °C to constant weight to obtain TiO2 / MgAl-LDH;

[0061] (3) Add 80 g of ammonium persulfate to 1 L of hydrochloric acid solution and stir evenly. The concentration of the hydrochloric acid is 1 mol / L, then add 30 g of the TiO2 / MgAl-LDH obtained in step (2) and 40 g of aniline, and stir and react at room temperature for 18 h, filter, wash, and dry at 80 °C to constant weight to obtain the PANI / TiO2 / MgAl-LDH composite material.

[0062] The preparation method of the L-cysteine-modified basalt scales includes the following steps:

[0063] 10 g of basalt scales and 20 g of L-cysteine were added to 200 mL of deionized water, ultrasonically dispersed for 9 min, and then stirred and reacted for 26 h at room temperature under a nitrogen atmosphere. After filtration, washing, and drying to constant weight at 80 °C, L-cysteine-modified basalt scales were obtained.

[0064] The preparation method of a corrosion-resistant and environmentally friendly coating is the same as that in Example 1.

[0065] Example 3

[0066] A corrosion-resistant and environmentally friendly coating, by weight, the raw materials of the environmentally friendly coating include:

[0067] 120 parts of epoxy resin;

[0068] 60 parts of curing agent;

[0069] 1 part of PANI / TiO2 / MgAl-LDH composite material;

[0070] 4 parts of L-cysteine-modified basalt scales;

[0071] 15 parts of filler;

[0072] 10 parts of water.

[0073] The preparation method of the PANI / TiO2 / MgAl-LDH composite material includes the following steps:

[0074] (1) 1 g of nano-TiO2 and 10 mL of ethylenediamine were dispersed into 150 mL of deionized water, stirred for 30 min, filtered, washed, and dried to constant weight at 60 °C to obtain ethylenediamine-modified nano-TiO2;

[0075] (2) 10 mg of the ethylenediamine-modified nano-TiO2 obtained in step (1), 2 mol of magnesium sulfate, and 1 mol of aluminum nitrate were ultrasonically dispersed into 200 mL of deionized water, then 5 mol of urea was added, stirred for 20 min, and then hydrothermally reacted at 120 °C for 12 h, filtered, washed, and dried to constant weight at 60 °C to obtain TiO2 / MgAl-LDH;

[0076] (3) 60 g of ammonium persulfate was added to 1 L of hydrochloric acid solution and stirred evenly, the concentration of the hydrochloric acid was 1 mol / L, then 30 g of the TiO2 / MgAl-LDH obtained in step (2) and 20 g of aniline were added, and stirred and reacted at room temperature for 12 h, filtered, washed, and dried to constant weight at 60 °C to obtain the PANI / TiO2 / MgAl-LDH composite material.

[0077] The preparation method of the L-cysteine-modified basalt scales includes the following steps:

[0078] 10 g of basalt scales and 10 g of L-cysteine were added to 200 mL of deionized water, ultrasonically dispersed for 3 min, and then stirred and reacted at room temperature under a nitrogen atmosphere for 18 h. After filtration, washing, and drying at 60 °C to constant weight, L-cysteine-modified basalt scales were obtained.

[0079] The preparation method of a corrosion-resistant and environmentally friendly coating is the same as that in Example 1.

[0080] Comparative Example 1

[0081] The difference between Comparative Example 1 and Example 1 is that the preparation method of the PANI / TiO2 / MgAl-LDH composite material includes the following steps:

[0082] (1) 10 mg of nano-TiO2, 3 mol of magnesium nitrate, and 1 mol of aluminum chloride were ultrasonically dispersed in 200 mL of deionized water, then 6 mol of urea was added, stirred for 25 min, and then hydrothermally reacted at 140 °C for 10 h. After filtration, washing, and drying at 70 °C to constant weight, TiO2 / MgAl-LDH was obtained;

[0083] (2) 70 g of ammonium persulfate was added to 1 L of hydrochloric acid solution and stirred evenly. The concentration of the hydrochloric acid was 1 mol / L. Then 30 g of the TiO2 / MgAl-LDH obtained in step (1) and 30 g of aniline were added, and stirred and reacted at room temperature for 16 h. After filtration, washing, and drying at 70 °C to constant weight, the PANI / TiO2 / MgAl-LDH composite material was obtained.

[0084] Comparative Example 2

[0085] The difference between Comparative Example 2 and Example 1 is that the PANI / MgAl-LDH composite material was used to replace the PANI / TiO2 / MgAl-LDH composite material. The preparation method of the PANI / MgAl-LDH composite material includes the following steps:

[0086] (1) 3 mol of magnesium nitrate and 1 mol of aluminum chloride were ultrasonically dispersed in 200 mL of deionized water, then 6 mol of urea was added, stirred for 25 min, and then hydrothermally reacted at 140 °C for 10 h. After filtration, washing, and drying at 70 °C to constant weight, MgAl-LDH was obtained;

[0087] (2) 70 g of ammonium persulfate was added to 1 L of hydrochloric acid solution and stirred evenly. The concentration of the hydrochloric acid was 1 mol / L. Then 30 g of the MgAl-LDH obtained in step (1) and 30 g of aniline were added, and stirred and reacted at room temperature for 16 h. After filtration, washing, and drying at 70 °C to constant weight, the PANI / TiO2 / MgAl-LDH composite material was obtained.

[0088] Comparative Example 3

[0089] The difference between Comparative Example 3 and Example 1 lies in that: an equal amount of TiO2 / MgAl-LDH composite material is used to replace the PANI / TiO2 / MgAl-LDH composite material. The preparation method of the TiO2 / MgAl-LDH composite material includes the following steps:

[0090] (1) Disperse 1 g of nano-TiO2 and 15 mL of ethylenediamine into 150 mL of deionized water, stir for 40 min, filter, wash, and dry at 70 °C to constant weight to obtain ethylenediamine-modified nano-TiO2;

[0091] (2) Ultrasonically disperse 10 mg of the ethylenediamine-modified nano-TiO2 obtained in step (1), 3 mol of magnesium nitrate, and 1 mol of aluminum chloride into 200 mL of deionized water, then add 6 mol of urea, stir for 25 min, and then carry out a hydrothermal reaction at 140 °C for 10 h, filter, wash, and dry at 70 °C to constant weight to obtain TiO2 / MgAl-LDH.

[0092] Comparative Example 4

[0093] The difference between Comparative Example 4 and Example 1 lies in that: L-cysteine modification is omitted.

[0094] Comparative Example 5

[0095] The difference between Comparative Example 5 and Example 1 lies in that: 0 part of PANI / TiO2 / MgAl-LDH composite material; 5 parts of L-cysteine-modified basalt scales.

[0096] Test the properties of the coatings of Examples 1-3 and Comparative Examples 1-5. The specific results are shown in Table 1:

[0097] Among them, adhesion (pull-off adhesion): GB / T 5210; impact resistance is measured according to GB 1732; the corrosion resistance is tested according to national standards GB / T 9274-88 and GB / T 1771-91.

[0098] Table 1

[0099]

[0100] As can be seen from Table 1, by comparing Example 1 with Comparative Examples 1-5, it can be seen that the corrosion-resistant and environmentally friendly coating prepared by the present invention has excellent corrosion resistance and excellent adhesion, and has good application prospects in ship corrosion resistance.

[0101] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and shall be included in the protection scope of the present invention.

Claims

1. A corrosion-resistant and environmentally friendly coating, characterized in that: By weight parts, the raw materials of the environment-friendly coating include:

2. The corrosion-resistant and environment-friendly coating according to claim 1, wherein: The epoxy resin is a waterborne epoxy resin, and the curing agent is a waterborne curing agent; the filler includes: a film-forming aid, an antifoaming agent, a dispersant and a leveling agent.

3. An anti-corrosion and environmentally friendly coating according to claim 1, characterized in that: The preparation method of the PANI / TiO2 / MgAl-LDH composite material includes the following steps: (1) Disperse nano-TiO2 and ethylenediamine into deionized water, stir, filter, wash, and dry to constant weight to obtain ethylenediamine-modified nano-TiO2. (2) Ultrasonically disperse the ethylenediamine-modified nano-TiO2, magnesium salt and aluminum salt obtained in step (1) into deionized water, then add urea, stir, and then carry out a hydrothermal reaction, filter, wash, and dry to constant weight to obtain TiO2 / MgAl-LDH. (3) Add ammonium persulfate to the hydrochloric acid solution and stir evenly, then add the TiO2 / MgAl-LDH and aniline obtained in step (2), stir and react at room temperature, filter, wash, and dry to constant weight to obtain the PANI / TiO2 / MgAl-LDH composite material.

4. The corrosion-resistant and environment-friendly paint according to claim 3, wherein: In step (1), the ratio of the nano-TiO2 to ethylenediamine is 1 g: 10-20 mL, the stirring time is 30-50 min, and the drying temperature is 60-80 °C.

5. The corrosion-resistant and environment-friendly coating according to claim 3, wherein: In step (2), the magnesium salt is one of magnesium nitrate, magnesium chloride, and magnesium sulfate, the aluminum salt is one of aluminum nitrate, aluminum chloride, and aluminum acetate, and the ratio of the ethylenediamine-modified nano-TiO2, magnesium salt, aluminum salt, and urea is: 10 mg: 2-4 mol: 1 mol: 5-7 mol; the stirring time is 20-30 min; the conditions of the hydrothermal reaction are hydrothermal reaction at 120-160 °C for 6-12 h; the drying temperature is 60-80 °C.

6. The corrosion-resistant and environment-friendly coating according to claim 3, characterized in that: In step (3), the concentration of the hydrochloric acid is 1 mol / L; the ratio of the TiO2 / MgAl-LDH, aniline, ammonium persulfate, and hydrochloric acid solution is: 30 g: 20-40 g: 60-80 g: 1 L; the stirring reaction time is 12-18 h, and the drying temperature is 60-80 °C.

7. The corrosion-resistant and environment-friendly coating according to claim 1, characterized in that: The preparation method of the L-cysteine-modified basalt flakes includes the following steps: Add basalt flakes and L-cysteine to deionized water, ultrasonically disperse, and then stir and react at room temperature and in a nitrogen atmosphere, filter, wash, and dry to constant weight to obtain L-cysteine-modified basalt flakes.

8. The corrosion-resistant and environment-friendly paint according to claim 7, characterized in that: The ultrasonic dispersion time is 3-9 min; the stirring reaction time is 18-26 h; the drying temperature is 60-80 °C; the mass ratio of the basalt flakes to L-cysteine is 1: 1-2.

9. The preparation method of a corrosion-resistant and environmentally friendly coating according to any one of claims 1-8, characterized in that: The preparation method includes the following steps: Add the PANI / TiO2 / MgAl-LDH composite material and L-cysteine-modified basalt flakes to water, stir at high speed for 20-40 min, the stirring speed is 3000-4000 r / min, then add epoxy resin and filler, and stir at a speed of 300-500 r / min for 10-30 min, and finally add a curing agent to obtain a corrosion-resistant environment-friendly coating.

10. Use of a corrosion-resistant and environmentally friendly coating according to any one of claims 1-8 in the field of ship anti-corrosion.

Images