Preparation process of anticorrosive paint for ocean engineering

Abstract

The invention discloses a preparation process of an anticorrosive coating for ocean engineering, and particularly relates to an anticorrosive coating, the method comprises the following steps: S1, preparing a product A, S2, preparing a product B, preparing the product B, and S3, carrying out mixing reaction, namely pouring the product A and the product B into a reaction kettle for reaction, s4, mixing and stirring: pouring the reacted product A and product 8 into a stirrer for stirring, and S5, grinding and paint mixing: grinding the stirred paint, and adding an auxiliary agent for paint mixing for use. According to the preparation process of the anticorrosive paint for ocean engineering, diffusion of a corrosive medium in the paint can be effectively prevented, and the binding force and toughness of the interior of the paint are enhanced, so that the properties of corrosion resistance, soaking resistance, binding force and the like of the paint are improved.

Description

Technical Field

[0001] The invention relates to the technical field of anti-corrosion coatings, and in particular to a preparation process of anti-corrosion coatings for marine engineering. Background Art

[0002] my country is a maritime power with 18,000 kilometers of coastline, more than 6,500 coastal islands, and more than 3 million square kilometers of sea area under its jurisdiction. By the end of 2004, there were 1,430 ports in mainland my country. In 2004, the national ports completed a cargo throughput of 4.172 billion tons, of which coastal ports completed 2.538 billion tons. It is estimated that the throughput capacity of coastal ports will exceed 5 billion tons in 2010. my country's shipbuilding industry was about 8.4 million tons in 2004 and will exceed 10 million tons in 2005. As early as 2000, my country accounted for 90% of the world's container production, with a production capacity of more than 2 million boxes / a. my country has rich marine resources and a booming marine industry, but the marine environment is very harsh and highly corrosive. Therefore, marine corrosion and protection will be an urgent problem to be solved in my country's economic development. The two basic series of marine coatings are marine antifouling coatings and marine anticorrosive coatings. According to the different materials and corrosion mechanisms of the anti-corrosion objects, marine anti-corrosion coatings can be divided into marine steel structure anti-corrosion coatings and non-steel structure anti-corrosion coatings. Marine steel structure anti-corrosion coatings mainly include ship coatings, container coatings, offshore bridges and dock steel facilities, oil pipelines, offshore platforms and other large facilities anti-corrosion coatings. Non-steel structure marine anti-corrosion coatings mainly include marine concrete structure anti-corrosion coatings and other anti-corrosion coatings.

[0003] Chinese patent document CN109321054A discloses a method for preparing an environmentally friendly marine antifouling and anticorrosion coating, including: preparation of an antifouling and anticorrosion strengthening emulsion: weighing 20-30 parts of a piezolluminescent material, 10-15 parts of a photocatalyst material and 30-40 parts of a zinc acrylate resin by weight; adding the piezolluminescent material, the photocatalyst material and the zinc acrylate resin together into a blender at a speed of 300 rpm, stirring for 5 minutes for preliminary mixing, and then adjusting the speed to more than 1200 rpm, stirring the antifouling and anticorrosion strengthening emulsion for 10 minutes, and preparation of an environmentally friendly antifouling and anticorrosion coating: adding the antifouling and anticorrosion strengthening emulsion and the environmentally friendly antifouling and anticorrosion coating into a blender at a weight ratio of 1:8-10 for mixing, stirring for more than 15 minutes at a speed of 800 rpm, and obtaining the product. In actual use, this patent is prone to react in a marine environment, affecting the service life of the coating, and has a weak effect on resisting microbial corrosion and fungal corrosion. Summary of the invention

[0004] The main purpose of the present invention is to provide a preparation process of an anti-corrosion coating for marine engineering, which can effectively solve the problem of long-term corrosion protection of metal substrates during use in marine environments.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A process for preparing an anti-corrosion coating for marine engineering, the method comprising: S1, preparing product A: preparing product A.

[0007] S2, preparing product B: preparing product B.

[0008] S3, mixed reaction: pouring the product A and the product B into a reactor for reaction.

[0009] S4, mixing and stirring: pouring the reacted product A and product 8 into a mixer and stirring.

[0010] S5, grinding and paint mixing: grinding the stirred paint, adding auxiliary agents to mix the paint before use.

[0011] Preferably, 250 mg of graphene and 25 ml of nitric acid are added to a 55 ml three-necked flask, the mixture is ultrasonically dispersed for 30 to 45 minutes, oxygen is removed from the reaction system, an oil bath is heated at 90 to 120° C., and the reaction is stirred for 20 to 35 hours. After the reaction is completed, the mixture is cooled to room temperature, filtered, and repeatedly washed with deionized water until the filtrate is neutral. Finally, the filtered precipitate is vacuum dried at 55 to 60° C. to obtain product A.

[0012] Preferably, 120 mg of product A and 22 ml of thionyl chloride are added to a 52 ml three-necked flask, and the mixture is ultrasonically dispersed for 30 to 40 minutes, oxygen is removed from the reaction system, and the reaction is heated in an oil bath at 65 to 80° C. and stirred for 20 to 35 hours, and excess thionyl chloride is removed under reduced pressure. Then, under argon protection, 25 ml of ethylene glycol solution is added, the temperature is raised to 120 to 130° C., and stirred for 18 to 26 hours. After the reaction is completed, the mixture is cooled to room temperature, filtered, and repeatedly washed with deionized water until the filtrate is neutral. Finally, the precipitate obtained by filtration is vacuum dried at 39 to 55° C. to obtain product B.

[0013] Preferably, 55 mg of product B, 15 mg of CuCl, 0.06 ml of pentamethyldiethylenetriamine, 2.3 ml of tert-butyl methacrylate, and 0.6 ml of trifluoroacetic acid are added to a reactor for reaction, and then stirred downward for 16 hours under argon protection and 45° C. After the reaction is completed, ultrasonic washing is performed and the treated graphene is obtained after centrifugal separation.

[0014] Preferably, 0.8 g of xylene, 1.6 g of n-butanol and 26 mg of the treated graphene are sequentially poured into a blender to mix evenly, and ultrasonically oscillated for 20 minutes to obtain a diluent.

[0015] Preferably, the epoxy resin E-44, curing agent, diluent and pigment are weighed in a certain proportion, mixed with the diluent, and stirred at a speed of 300 to 400 r / min for 10 to 18 minutes using a magnetic stirring device to obtain an anti-corrosion coating.

[0016] Preferably, the stirred paint is poured into a paint grinder. Since an adjusting device is provided between the grinding bodies, and the adjusting device can move the grinding bodies to both sides, the inner diameter of the grinding channel is reduced, so that the ground material can be ground in a smaller grinding space, thereby obtaining a more finely ground paint.

[0017] Preferably, the ground paint is added with a certain proportion of auxiliary agent and then poured into a paint mixing machine. Since the paint mixing machine is provided with stirring blades, the paint in the mixing barrel can be fully stirred, so that the paint and the auxiliary agent are mixed more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the steps of the preparation process of the anti-corrosion coating of the present invention; DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0020] Embodiment 1

[0021] This example discloses a process for preparing an anticorrosive coating for marine engineering. Figure 1 As shown, the method steps include:

[0022] S1. Preparation of product A: preparation of product A.

[0023] S2. Preparation of product B: preparation of product B.

[0024] S3, mixed reaction: pour product A and product B into a reactor for reaction.

[0025] S4, mixing and stirring: pour the reacted product A and product 8 into a mixer and stir.

[0026] S5. Grinding and paint mixing: Grind the stirred paint and add auxiliary agents to mix the paint before use.

[0027] Embodiment 2

[0028] This embodiment discloses a preparation process of an anti-corrosion coating for marine engineering, comprising: adding 250 mg of graphene and 25 ml of nitric acid into a 55 ml three-necked flask, ultrasonically dispersing the mixture for 30 to 45 minutes, removing oxygen from the reaction system, heating in an oil bath at 90 to 120° C., and reacting for 20 to 35 hours under stirring. After the reaction is completed, cooling to room temperature, filtering, and repeatedly washing with deionized water until the filtrate is neutral, and finally vacuum drying the precipitate obtained by filtration at 55 to 60° C. to obtain product A.

[0029] 120 mg of product A and 22 ml of thionyl chloride are added to a 52 ml three-necked flask, and the mixture is ultrasonically dispersed for 30 to 40 minutes. The reaction system is deoxygenated, and the reaction is heated in an oil bath at 65 to 80° C. and stirred for 20 to 35 hours. Excess thionyl chloride is removed under reduced pressure, and then 25 ml of ethylene glycol solution is added under argon protection, and the temperature is raised to 120 to 130° C. and stirred for 18 to 26 hours. After the reaction is completed, the mixture is cooled to room temperature, filtered, and repeatedly washed with deionized water until the filtrate is neutral. Finally, the filtered precipitate is vacuum dried at 39 to 55° C. to obtain product B.

[0030] 55 mg of product B, 15 mg of CuCl, 0.06 ml of pentamethyldiethylenetriamine, 2.3 ml of tert-butyl methacrylate and 0.6 ml of trifluoroacetic acid were added into the reactor for reaction, and then stirred for 16 h under argon protection at 45 °C. After the reaction, ultrasonic washing was performed and the treated graphene was obtained after centrifugal separation.

[0031] 0.8 g of xylene, 1.6 g of n-butanol, and 26 mg of the treated graphene were sequentially poured into a blender and mixed evenly, and ultrasonically oscillated for 20 minutes to obtain a diluent.

[0032] Epoxy resin E-44, curing agent, diluent and pigment are weighed in a certain proportion, mixed with the diluent, and stirred for 10 to 18 minutes at a speed of 300 to 400 r / min using a magnetic stirring device to obtain an anti-corrosion coating.

[0033] Pour the stirred paint into the paint grinder. There is an adjusting device between the grinding bodies, which can move the grinding bodies to both sides, thereby reducing the inner diameter of the grinding channel. The ground material can be ground in a smaller grinding space, thereby obtaining a more finely ground paint.

[0034] After adding a certain proportion of auxiliary agent to the ground paint, pour it into the paint mixing machine. Because the paint mixing machine is equipped with stirring blades, the paint in the mixing barrel can be fully stirred, making the paint and auxiliary agent mixed more evenly.

[0035] The working principle of the present invention is: preparing product A: preparing product A; preparing product B: preparing product B; mixing reaction: pouring product A and product B into a reactor for reaction; mixing and stirring: pouring the reacted product A and product 8 into a mixer for stirring; grinding and paint mixing: grinding the stirred paint, and adding an auxiliary agent for paint mixing before use.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A process for preparing an anticorrosive coating for marine engineering, comprising: S1, preparing product A: preparing product A; S2, preparing product B: preparing product B; S3, mixing reaction: pouring product A and product B into a reactor for reaction; S4, mixing and stirring: pouring the reacted product A and product 8 into a mixer and stirring; S5, grinding and paint mixing: grinding the stirred paint, adding auxiliary agents and mixing the paint before use.

2. The preparation process of an anticorrosive coating for marine engineering according to claim 1, characterized in that: 250 mg of graphene and 25 ml of nitric acid are added to a 55 ml three-necked flask, and the mixture is ultrasonically dispersed for 30 to 45 minutes. The reaction system is deoxygenated, and the system is heated in an oil bath at 90 to 120° C. and stirred for 20 to 35 hours. After the reaction is completed, the system is cooled to room temperature, filtered, and repeatedly washed with deionized water until the filtrate is neutral. Finally, the filtered precipitate is vacuum dried at 55 to 60° C. to obtain product A.

3. The preparation process of an anticorrosive coating for marine engineering according to claim 2, characterized in that: 120 mg of product A and 22 ml of thionyl chloride are added to a 52 ml three-necked flask, and the mixture is ultrasonically dispersed for 30 to 40 minutes. Oxygen is removed from the reaction system, and the reaction is heated in an oil bath at 65 to 80° C. and stirred for 20 to 35 hours. Excess thionyl chloride is removed under reduced pressure, and then 25 ml of ethylene glycol solution is added under argon protection, the temperature is raised to 120 to 130° C., and stirred for 18 to 26 hours. After the reaction is completed, the mixture is cooled to room temperature, filtered, and repeatedly washed with deionized water until the filtrate is neutral. Finally, the filtered precipitate is vacuum dried at 39 to 55° C. to obtain product B.

4. The preparation process of an anticorrosive coating for marine engineering according to claim 3, characterized in that: 55 mg of product B, 15 mg of CuCl, 0.06 ml of pentamethyldiethylenetriamine, 2.3 ml of tert-butyl methacrylate and 0.6 ml of trifluoroacetic acid were added into a reactor for reaction, and then stirred for 16 h under argon protection at 45° C., and then ultrasonically washed after the reaction was completed, and the treated graphene was obtained after centrifugal separation.

5. The process for preparing an anticorrosive coating for marine engineering according to claim 4, characterized in that: 0.8 g of xylene, 1.6 g of n-butanol, and 26 mg of the treated graphene are sequentially poured into a blender to mix evenly, and then ultrasonically oscillated for 20 minutes to obtain a diluent.

6. The process for preparing an anticorrosive coating for marine engineering according to claim 5, characterized in that: The epoxy resin E-44, curing agent, diluent and pigment are weighed in a certain proportion, mixed with the diluent, and stirred for 10 to 18 minutes at a speed of 300 to 400 r / min using a magnetic stirring device to obtain an anti-corrosion coating.

7. The process for preparing an anticorrosive coating for marine engineering according to claim 6, characterized in that: The stirred paint is poured into the paint grinder. Since an adjusting device is provided between the grinding bodies, and the adjusting device can move the grinding bodies to both sides, the inner diameter of the grinding channel is reduced, so that the ground material can be ground in a smaller grinding space, thereby obtaining a more finely ground paint.

8. The process for preparing an anticorrosive coating for marine engineering according to claim 7, characterized in that: The ground paint is added with a certain proportion of auxiliary agent and then poured into a paint mixing machine. Since the paint mixing machine is provided with stirring blades, the paint in the mixing barrel can be fully stirred, so that the paint and the auxiliary agent are mixed more evenly.

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