Alkyd coating for corrosion prevention of pipeline wall

Abstract

The utility model relates to the field of coatings, in particular to an alcohol acid coating for corrosion prevention of a pipeline wall. The technical problem to be solved by the utility model is to provide an alcohol acid coating for corrosion prevention of a pipeline wall, which can realize multi-layer collaborative corrosion prevention with rust prevention, barrier, impermeability and weather resistance and remarkably improve durability and reliability in an extreme environment. The utility model discloses an alcohol acid coating for corrosion prevention of a pipeline wall. The alcohol acid coating comprises a primer layer, a first antirust layer, a second antirust layer, a damp-proof layer, an anti-permeability layer and a finish paint layer, the primer layer is uniformly coated on the pipeline wall; the top of the primer layer is uniformly coated with a first anti-rust layer, the top of the first anti-rust layer is uniformly coated with a second anti-rust layer, the top of the second anti-rust layer is uniformly coated with a damp-proof layer, and the top of the damp-proof layer is uniformly coated with an impervious layer. According to the utility model, the effects of multi-layer synergetic corrosion prevention of rust prevention, obstruction, impermeability and weather resistance are achieved, and the durability and the reliability in an extreme environment are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of coatings, and in particular to an alkyd coating for pipe wall corrosion protection. Background Technology

[0002] In the fields of petroleum, chemical, marine engineering, and municipal construction, metal pipelines are exposed to complex environments such as humidity, salt spray, acid and alkali media, and mechanical impact for extended periods. This makes them susceptible to electrochemical corrosion, chemical corrosion, and physical damage, leading to pipe wall thinning, leakage, and even failure, severely impacting project safety and service life. Traditional pipeline anti-corrosion coatings often employ single or simple composite coating systems, such as alkyd primers combined with ordinary topcoats. While these provide basic protection, they struggle to meet the comprehensive requirements of long-term rust prevention, resistance to media penetration, mechanical strength, and environmental adaptability. Existing technologies suffer from single-function rust-preventive layers and insufficient interlayer compatibility, making them prone to peeling due to humid heat penetration or mechanical stress. Furthermore, topcoats with poor weather resistance are prone to chalking and fading, weakening long-term protective effects. In addition, their impermeability and chemical corrosion resistance under complex operating conditions are insufficient, failing to meet the high standards of modern engineering for pipeline protection throughout its entire lifecycle. Therefore, there is an urgent need to develop an alkyd coating for pipeline walls that can achieve multi-layered synergistic anti-corrosion, including rust prevention, barrier properties, impermeability, and weather resistance, significantly improving durability and reliability in extreme environments. Utility Model Content

[0003] To overcome the shortcomings of existing anti-rust coatings, such as limited functionality, insufficient interlayer compatibility, and susceptibility to peeling due to damp heat penetration or mechanical stress, as well as the tendency of poorly weather-resistant topcoats to chalk and fade, thus weakening long-term protective effects, this invention aims to provide an alkyd coating for pipe wall corrosion protection that achieves multi-layer synergistic anti-corrosion, including rust prevention, barrier properties, impermeability, and weather resistance, significantly improving durability and reliability in extreme environments.

[0004] This utility model is achieved by the following specific technical means:

[0005] An alkyd coating for pipe wall corrosion protection includes a primer layer, a first anti-rust layer, a second anti-rust layer, a moisture-proof layer, an anti-seepage layer, and a topcoat layer. The primer layer is uniformly coated on the pipe wall. The first anti-rust layer is uniformly coated on top of the primer layer, the second anti-rust layer is uniformly coated on top of the first anti-rust layer, the moisture-proof layer is uniformly coated on top of the second anti-rust layer, the anti-seepage layer is uniformly coated on top of the moisture-proof layer, and the topcoat layer is uniformly coated on top of the anti-seepage layer. The coating consists of, from the inside out, the primer layer, the first anti-rust layer, the second anti-rust layer, the moisture-proof layer, the anti-seepage layer, and the topcoat layer.

[0006] Furthermore, the primer layer is a red lead alkyd anti-rust primer; the red lead alkyd anti-rust primer is made by grinding and preparing alkyd resin, red lead powder, anti-rust pigment, solvent and additives, and has excellent adhesion and anti-rust properties, fast drying speed, and is suitable for basic protection of metal pipe surfaces.

[0007] Furthermore, the first anti-rust layer is an epoxy iron oxide red primer layer; the epoxy iron oxide red primer has a high-strength paint film and high-temperature resistance, strong adhesion and excellent mechanical properties, which can enhance the anti-rust stability of the pipeline structure.

[0008] Furthermore, the second anti-rust layer is an epoxy zinc phosphate anti-rust coating; the epoxy zinc phosphate anti-rust coating film is hard and wear-resistant, has outstanding salt spray resistance, and possesses long-term anti-rust capability and water resistance.

[0009] Furthermore, the moisture-proof layer is a chlorinated polyethylene anti-corrosion paint layer; the chlorinated polyethylene anti-corrosion paint has dual functions of anti-mildew and moisture-proof, strong resistance to acid and alkali corrosion, and effectively blocks the penetration of external moisture into the pipeline.

[0010] Furthermore, the impermeable layer is an epoxy micaceous iron oxide intermediate paint; the epoxy micaceous iron oxide intermediate paint is a two-component system composed of epoxy resin, flake-like mica iron oxide, anti-rust pigments and polyamide curing agent, which has the characteristics of impermeability and resistance to media corrosion, and the paint film has excellent impact resistance.

[0011] Furthermore, the topcoat layer is an acrylic polyurethane anti-corrosion paint; the acrylic polyurethane anti-corrosion paint has excellent weather resistance and color retention, the paint film is full and glossy, and it is resistant to corrosion by acids, alkalis, salts and chemical solvents, while also possessing both decorative and mechanical protective functions.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention achieves multi-layered synergistic corrosion protection with rust prevention, barrier, impermeability and weather resistance, significantly improving durability and reliability in extreme environments.

[0014] Through the layer-by-layer optimization of primer, double anti-rust layer, moisture-proof layer, anti-seepage layer and topcoat layer, a protective network is formed that combines physical shielding, chemical passivation and mechanical reinforcement, significantly improving the durability and reliability of pipelines in extreme environments. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0016] The labels in the attached diagram are: 1-primer layer, 2-first anti-rust layer, 3-second anti-rust layer, 4-moisture-proof layer, 5-anti-seepage layer, 6-topcoat layer. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings: Example

[0018] An alkyd coating for pipe wall corrosion protection, such as Figure 1 As shown, the coating includes a primer layer 1, a first anti-rust layer 2, a second anti-rust layer 3, a moisture-proof layer 4, an anti-seepage layer 5, and a topcoat layer 6. The primer layer 1 is uniformly coated on the pipe wall. The first anti-rust layer 2 is uniformly coated on top of the primer layer 1, the second anti-rust layer 3 is uniformly coated on top of the first anti-rust layer 2, the moisture-proof layer 4 is uniformly coated on top of the second anti-rust layer 3, the anti-seepage layer 5 is uniformly coated on top of the moisture-proof layer 4, and the topcoat layer 6 is uniformly coated on top of the anti-seepage layer 5. The coating, from the inside out, consists of the primer layer 1, the first anti-rust layer 2, the second anti-rust layer 3, the moisture-proof layer 4, the anti-seepage layer 5, and the topcoat layer 6.

[0019] Working principle:

[0020] This utility model relates to an alkyd coating. The primer layer 1 is located on the innermost side and is uniformly coated on the pipe wall. Primer layer 1 is a red lead alkyd anti-rust primer, which is prepared by grinding alkyd resin, red lead powder, anti-rust pigments, solvents, and additives. It has excellent adhesion and anti-rust properties, and dries quickly, making it suitable for basic surface protection of metal pipes. A first anti-rust layer 2 is uniformly coated on the outer surface of primer layer 1. The first anti-rust layer 2 is an epoxy iron oxide red primer layer 1. Epoxy iron oxide red primer has a high-strength film and high-temperature resistance, strong adhesion, and excellent mechanical properties, which can enhance the anti-rust stability of the pipe structure. A second anti-rust layer 3 is uniformly coated on the outer surface of the first anti-rust layer 2. The second anti-rust layer 3 is an epoxy zinc phosphate anti-rust coating. The epoxy zinc phosphate anti-rust coating has a hard and wear-resistant film, outstanding salt spray resistance, and long-term anti-rust capability. The second anti-rust layer 3 has a moisture-proof layer 4 uniformly coated on its outer surface. The moisture-proof layer 4 is a chlorinated polyethylene anti-corrosion paint layer, which has dual functions of mildew and moisture prevention, strong resistance to acid and alkali corrosion, and effectively blocks the penetration of external moisture into the pipeline. The moisture-proof layer 4 has an anti-seepage layer 5 uniformly coated on its outer surface. The anti-seepage layer 5 is an epoxy micaceous iron oxide intermediate paint, which is a two-component system composed of epoxy resin, flake-like mica iron oxide, anti-rust pigments, and polyamide curing agent. It has anti-seepage and media corrosion resistance characteristics, and the paint film has excellent impact resistance. The anti-seepage layer 5 has a topcoat layer 6 uniformly coated on its outer surface. The topcoat layer 6 is an acrylic polyurethane anti-corrosion paint, which has super weather resistance and color retention. The paint film is full and glossy, resistant to acid, alkali, salt and chemical solvent corrosion, and has both decorative and mechanical protection functions.

[0021] Although this disclosure has been described in detail with reference to exemplary embodiments, it is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of this disclosure.

Claims

1. An alkyd coating for pipe wall corrosion protection, characterized in that, It includes a primer layer (1), a first anti-rust layer (2), a second anti-rust layer (3), a moisture-proof layer (4), an anti-seepage layer (5), and a topcoat layer (6); the primer layer (1) is uniformly coated on the pipe wall; the top of the primer layer (1) is uniformly coated with the first anti-rust layer (2), the top of the first anti-rust layer (2) is uniformly coated with the second anti-rust layer (3), the top of the second anti-rust layer (3) is uniformly coated with the moisture-proof layer (4), the top of the moisture-proof layer (4) is uniformly coated with the anti-seepage layer (5), and the top of the anti-seepage layer (5) is uniformly coated with the topcoat layer (6); the coating is arranged from the inside to the outside as primer layer (1), first anti-rust layer (2), second anti-rust layer (3), moisture-proof layer (4), anti-seepage layer (5), and topcoat layer (6).

2. The alkyd coating for pipe wall corrosion protection according to claim 1, characterized in that, The primer layer (1) is red lead alkyd anti-rust primer.

3. The alkyd coating for pipe wall corrosion protection according to claim 1, characterized in that, The first anti-rust layer (2) is an epoxy iron oxide red primer layer (1).

4. The alkyd coating for pipe wall corrosion protection according to claim 1, characterized in that, The second anti-rust layer (3) is an epoxy zinc phosphate anti-rust coating.

5. The alkyd coating for pipe wall corrosion protection according to claim 1, characterized in that, The moisture-proof layer (4) is a chlorinated polyethylene anti-corrosion paint layer.

6. The alkyd coating for pipe wall corrosion protection according to claim 1, characterized in that, The impermeable layer (5) is an epoxy micaceous iron oxide intermediate paint.

7. The alkyd coating for pipe wall corrosion protection according to claim 1, characterized in that, The topcoat layer (6) is an acrylic polyurethane anti-corrosion paint.

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