Ship multi-scene application heavy anti-corrosion coating and preparation method thereof

Abstract

The invention relates to the field of heavy anti-corrosion coatings, in particular to a heavy anti-corrosion coating for ship multi-scene application and a preparation method of the heavy anti-corrosion coating. The method is used for improving the protection performance and prolonging the service life of seawater pipelines and other equipment and systems under the protection of heavy anti-corrosion coatings. The invention relates to a heavy anti-corrosion coating applied to ships in multiple scenes and a preparation method of the heavy anti-corrosion coating, aiming at reducing the film thickness and the construction period of an existing anti-corrosion coating. The technical scheme is as follows: screening and optimizing a coating material, taking vinyl resin as a main film forming substance, adding a nano filler and a special additive, and preparing a thin-coating heavy anti-corrosion coating through a unique process. The successful implementation of the technology provides an effective solution for the anti-corrosion problem of ship pipeline systems, equipment and multi-scene application, the maintenance cost is reduced, the operation efficiency is improved, and the marine environment is protected.

Description

Technical Field

[0001] The present invention relates to the field of heavy-duty anti-corrosion coatings, and in particular to a heavy-duty anti-corrosion coating for multi-scenario application on ships and a preparation method thereof. Background Art

[0002] With the growth of global trade and the development of marine resources, the shipping industry faces the challenge of corrosion from a variety of fluid media. Seawater, fuel exhaust gas, fuel oil, etc. contain a variety of electrolytes, microorganisms and sulfides, which are highly corrosive to metals and seriously affect the operation of ship systems and their own safety. Therefore, it is crucial to develop efficient and environmentally friendly anti-corrosion coatings. Although there are some products on the market, they have problems such as insufficient adhesion, unstable protective performance, and short service life, which increase maintenance costs and may pollute the ocean. The existing coatings have poor use effects, and the manufacturing process is labor-intensive and inefficient, which cannot meet the growing and diverse needs. For the currently used heavy-duty anti-corrosion coatings for ships, the existing process is generally based on vinyl resin as the base resin (also known as epoxy acrylate resin) material, and is combined with glass fiber cloth for performance enhancement, that is, glass fiber reinforced vinyl ester resin (GRVE), but the construction process is complicated and time-consuming. Especially when constructing the inner wall of the pipeline, the number of coating layers is large and the construction is difficult. The thickness of the final coating material obtained is between 3mm and 5mm, and the raw material cost is high.

[0003] The present invention aims to develop a new type of heavy-duty corrosion-resistant coating to improve the protective performance and service life of seawater pipelines and other equipment and systems. Taking into account the protective performance, environmental protection, construction performance and other factors, the coating material is screened and optimized, and a thin-coated heavy-duty corrosion-resistant coating is prepared through a unique process with vinyl resin as the main film-forming material, nanofillers and special additives added.

[0004] The successful implementation of the technology provides effective solutions for corrosion prevention problems of ship piping systems, equipment and multi-scenario applications, reduces maintenance costs, improves operational efficiency and protects the marine environment. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing a heavy-duty anti-corrosion coating for multi-scenario application on ships, which can provide excellent anti-corrosion performance, simple construction process and long service life. The anti-corrosion coating of the present invention is composed of a primer, a mid-coat and a top-coat. The function of the primer is to increase the adhesion between the coating and the substrate to prevent it from falling off. The mid-coat replaces the glass fiber cloth with glass flakes to achieve high-strength anti-corrosion requirements. The top-coat adds a modified filler component to increase the wear resistance and liquid penetration resistance of the surface coating.

[0006] The specific coating compositions are as follows:

[0007] Top coating: vinyl resin, anti-corrosion filler, glass flake, modified filler.

[0008] Middle coating: vinyl resin, anticorrosive filler, modified resin, glass flake;

[0009] Primer: vinyl resin, anticorrosive filler, adhesion promoter;

[0010] The base coating can be made by rotary spraying, the middle coating and top coating can be made by roller coating. The total coating thickness is between 1mm and 3mm.

[0011] Preferably, the resin material vinyl resin in the primer is a composite of one or more of epoxy-modified, polyol-modified, acid- and acid anhydride-modified, polyurethane-modified, silicone-modified, and phosphorus-modified.

[0012] Preferably, the anticorrosive filler in the primer is a composite filler of one or more of nano-montmorillonite, nano-silicon dioxide, nano-alumina and zinc.

[0013] Preferably, the adhesion promoter in the primer is a reactive silane or phosphate adhesion promoter.

[0014] The primer is a zinc-rich epoxy modified vinyl resin composite coating. Based on the anti-corrosion mechanism, the penetration of corrosive media is a difficulty that needs to be solved. Nano-functional fillers can provide great performance improvements at the physical barrier level.

[0015] Preferably, the resin material vinyl resin in the mid-coat is a composite of one or more of polyol-modified, acid- and acid anhydride-modified, polyurethane-modified, silicone-modified, and phosphorus-modified.

[0016] Preferably, the anticorrosive filler in the mid-coat is a composite filler of one or more of nano-montmorillonite, nano-silicon dioxide, nano-alumina, and nano-titanium dioxide.

[0017] Preferably, the modified resin in the mid-coat is a composite resin of one or more of alkyd-modified and silicone-modified vinyl resins.

[0018] Preferably, the glass flakes in the mid-coat are a mixture of 20-400 mesh glass flakes or epoxy-modified glass flakes.

[0019] The midcoat is a glass flake reinforced modified vinyl resin composite coating, which further enhances the anti-corrosion performance of the coating and enhances the mechanical properties of the coating. Glass flakes can improve the anti-corrosion performance of the coating through a physical barrier mechanism.

[0020] Preferably, the resin material vinyl resin in the top coating is a composite of one or more of acrylic modified, polyurethane modified, and silicone modified.

[0021] Preferably, the anticorrosive filler in the topcoat is a composite filler of one or more of nano-silicon dioxide, nano-aluminum oxide and nano-titanium dioxide.

[0022] Preferably, the glass flakes in the topcoat are acrylic or polyurethane modified glass flakes.

[0023] Preferably, the modified filler in the topcoat is a filler such as nano-silicon dioxide, nano-zirconia, etc. modified by acrylic acid or polyurethane.

[0024] The top coating is an acrylic or polyurethane modified vinyl resin composite coating to enhance the coating's anti-corrosion, wear-resistant and other mechanical properties.

[0025] It should be understood that within the scope of the present invention, the above-mentioned technical features of the present invention and the technical features specifically described below (such as embodiments) can be combined with each other to form a new or preferred technical solution. Due to space limitations, they will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention has 1 drawing, in which:

[0027] Figure 1 The schematic diagram of the coating structure of the present invention shows that the thickness of the primer, mid-coat and top-coat are not evenly distributed. A person skilled in the art can adjust the thickness according to specific needs based on the basic technology. The total thickness can fluctuate within the range of 1 mm to 3 mm.

[0028] The technical solutions and implementations of the present invention may be more clearly understood through the above drawings and descriptions. DETAILED DESCRIPTION

[0029] It should be noted that the following descriptions with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] The resin material vinyl resin in the primer is epoxy-modified vinyl composite resin. The anti-corrosion filler is a composite filler of zinc powder, nano-silicon dioxide, and nano-alumina. The adhesion promoter is a reactive phosphate adhesion promoter. The weight of each component is as follows:

[0032] The epoxy-modified vinyl composite resin is added in an amount of 5 to 10 parts;

[0033] The zinc powder is added in an amount of 70 to 80 parts;

[0034] The amount of nano silicon dioxide added is 2 to 5 parts;

[0035] The amount of nano-alumina added is 2 to 5 parts;

[0036] The reactive phosphate adhesion promoter is added in an amount of 0.5 to 3 parts.

[0037] Embodiment 2:

[0038] The resin material vinyl resin in the midcoat is a polyol modified vinyl composite resin. The anticorrosive filler is a composite filler of nano-montmorillonite and nano-silicon dioxide. The modified resin is an alkyd modified vinyl resin. The glass flakes are a mixture of glass flakes of different mesh sizes. The weight of each component is as follows:

[0039] The polyol-modified vinyl composite resin is added in an amount of 40 to 60 parts;

[0040] The amount of the nano-montmorillonite added is 2 to 5 parts;

[0041] The amount of nano silicon dioxide added is 10 to 15 parts;

[0042] The alkyd modified vinyl resin is added in an amount of 5 to 10 parts;

[0043] The added amount of the glass flakes is 15 to 30 parts, including 8 to 15 parts of 60 mesh, 5 to 10 parts of 100 mesh, and 2 to 5 parts of 300 mesh.

[0044] Embodiment 3:

[0045] The resin material vinyl resin in the topcoat is polyurethane modified vinyl composite resin. The anticorrosive filler is a composite filler of nano silicon dioxide and nano titanium dioxide. The glass flakes are polyurethane modified glass flakes. The weight of each component is as follows:

[0046] The polyurethane modified vinyl composite resin is added in an amount of 40 to 60 parts;

[0047] The amount of nano silicon dioxide added is 10 to 15 parts;

[0048] The amount of nano titanium dioxide added is 2 to 5 parts;

[0049] The polyurethane modified glass flakes are added in an amount of 15 to 30 parts.

[0050] Embodiment 4:

[0051] Coating formula design and construction technology are key links in the coating process. For the existing thick coating construction technology, there are some optimization solutions, one of the common solutions is to use a thin coating solution of primer, mid-coat and topcoat.

[0052] In terms of construction technology, single-layer thin coatings require precise construction technology. First, the surface of the substrate must be strictly treated to ensure that there are no pollutants such as oil, dust, and water vapor. For the construction process of primer, mid-coat, and top-coat thin coatings, the primer has good permeability and multiple full-angle rotary spraying methods are used to obtain a thin bottom coating with high adhesion and high corrosion resistance. The total thickness is controlled between 300 microns and 800 mm.

[0053] The middle coating is applied by roller coating to further enhance the anti-corrosion and mechanical properties. The total thickness is controlled between 500 microns and 1.5 mm.

[0054] The top coating is also applied by roller coating, which can obtain a highly weather-resistant and anti-corrosion surface coating with a total thickness of 200 microns to 700 mm.

[0055] The total thickness of the primer, mid-coat and top-coat thin coating is controlled in the range of 1mm to 3mm.

[0056] In addition, it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the concept of the present invention and the prior art, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A heavy-duty anti-corrosion coating for multi-scenario application on ships and a preparation method thereof.

2. According to claim 1, it is characterized in that include: Top coating: vinyl resin, anti-corrosion filler, glass flake, modified filler. Middle coating: vinyl resin, anticorrosive filler, modified resin, glass flake; Primer: vinyl resin, anticorrosive filler, adhesion promoter; The base coating can be made by rotary spraying, the middle coating and top coating can be made by roller coating. The total coating thickness is between 1mm and 3mm.

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