Anti-corrosion thermal spraying metal alloy coating structure

Abstract

The utility model relates to an anti-corrosion thermal spraying metal alloy coating structure, and aims to solve the problems that the internal stress of a coating is too large because the difference between the linear expansion coefficients of a thermal spraying metal alloy layer and a spraying base layer on the current anti-corrosion thermal spraying metal alloy coating structure is large; the thermal spraying metal alloy coating structure comprises a metal base layer, the outer surface of the metal base layer is connected with a spraying base layer through an adhesion layer, and the outer surface of the spraying base layer is connected with a thermal spraying metal alloy layer through a gradient material layer. According to the method, the situation that the internal stress of the coating is too large due to the fact that the linear expansion coefficient difference between the thermal spraying metal alloy layer and the spraying base layer is large is avoided, the bonding strength of the coating and the base body is improved, and the adhesive force of the metal alloy sprayed to the metal base layer can be enhanced by adding the adhesive layer; and the phenomenon that the metal alloy coating structure falls off after being used for a long time is avoided.

Description

Technical Field

[0001] The utility model relates to the field of metal alloy coating structures, and particularly to an anti-corrosion thermal spraying metal alloy coating structure. Background Art

[0002] The corrosion of metal alloy components is an important factor restricting their service life. Therefore, many studies are dedicated to improving the corrosion resistance of metal components. It is generally believed that depositing a protective coating on the surface of the base metal that meets the structural load-bearing performance is an effective way to improve the corrosion resistance of the base metal. For cathodic protection coatings, the coating can act as an effective barrier to isolate the base metal from the corrosive environment and hinder or slow down the corrosion of the base metal.

[0003] In the process of implementing the present utility model, the inventor found that at least the following problems in the prior art have not been solved. During use, the difference in the linear expansion coefficients between the thermal spraying metal alloy layer and the spraying base layer on the traditional anti-corrosion thermal spraying metal alloy coating structure is relatively large, which easily leads to excessive internal stress in the coating, and the metal alloy coating structure is prone to falling off after long-term use. Therefore, it is necessary to design a new technical solution to solve this problem. Summary of the Utility Model

[0004] The purpose of the present utility model is to overcome the deficiencies of the prior art, meet the actual needs, and provide an anti-corrosion thermal spraying metal alloy coating structure to solve the technical problems that the difference in the linear expansion coefficients between the thermal spraying metal alloy layer and the spraying base layer on the current anti-corrosion thermal spraying metal alloy coating structure is relatively large, which easily leads to excessive internal stress in the coating, and the metal alloy coating structure is prone to falling off after long-term use.

[0005] To achieve the purpose of the present utility model, the technical solution adopted by the present utility model is as follows: Design an anti-corrosion thermal spraying metal alloy coating structure, including a metal base layer, the outer surface of the metal base layer is connected with a spraying base layer through an adhesion layer, and the outer surface of the spraying base layer is connected with a thermal spraying metal alloy layer through a gradient material layer.

[0006] Preferably, the thickness of the adhesion layer is 0.5 mm, and the adhesion layer covers the entire outer surface of the metal base layer.

[0007] Preferably, the spraying base layer is evenly sprayed on the outer surface of the adhesion layer, and the thickness of the spraying base layer is 0.5 mm.

[0008] Preferably, the gradient material layer is evenly sprayed on the outer surface of the spraying base layer, and the thickness of the gradient material layer is 2 mm.

[0009] Preferably, the thermal sprayed metal alloy layer is evenly sprayed on the outer surface of the gradient material layer, and the thickness of the thermal sprayed metal alloy layer is 5 mm.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] By adding the gradient material layer, the present utility model avoids the excessive internal stress in the coating caused by the large difference in the linear expansion coefficients between the thermal sprayed metal alloy layer and the spraying base layer, improves the bonding strength between the coating and the substrate, and by adding the adhesion layer, it can enhance the adhesion of the metal alloy after being sprayed onto the metal base layer, avoiding the phenomenon of peeling off of the metal alloy coating structure after long-term use. Description of the Drawings

[0012] Figure 1 is a cross-sectional view of the present utility model;

[0013] In the figure: 1, metal base layer; 2, adhesion layer; 3, spraying base layer; 4, gradient material layer; 5, thermal sprayed metal alloy layer. Specific Embodiments

[0014] The present utility model will be further described below with reference to the drawings and embodiments:

[0015] Embodiment 1: An anti-corrosion thermal sprayed metal alloy coating structure, see Figure 1 , including a metal base layer 1, the outer surface of the metal base layer 1 is connected to a spraying base layer through an adhesion layer 2, and the outer surface of the spraying base layer is connected to a thermal sprayed metal alloy layer 5 through a gradient material layer 4. By adding the gradient material layer 4, the present utility model avoids the excessive internal stress in the coating caused by the large difference in the linear expansion coefficients between the thermal sprayed metal alloy layer 5 and the spraying base layer, improves the bonding strength between the coating and the substrate, and by adding the adhesion layer 2, it can enhance the adhesion of the metal alloy after being sprayed onto the metal base layer 1, avoiding the phenomenon of peeling off of the metal alloy coating structure after long-term use.

[0016] Specifically, see Figure 1 , the thickness of the adhesion layer 2 is 0.5 mm, the adhesion layer 2 covers the entire outer surface of the metal base layer 1, and the adhesion layer 2 is formed by polishing with a burring machine, enhancing the adhesion between the spraying base layer and the metal base layer 1.

[0017] Furthermore, see Figure 1 , the spraying base layer is evenly sprayed on the outer surface of the adhesion layer 2, and the thickness of the spraying base layer is 0.5 mm, improving the firmness when the gradient material layer 4 is sprayed on the adhesion layer 2.

[0018] It should be noted that, see Figure 1, the gradient material layer 4 is evenly sprayed on the outer surface of the spraying base layer. The thickness of the gradient material layer 4 is 2 mm. The thermal spraying metal alloy layer 5 is evenly sprayed on the outer surface of the gradient material layer 4. The thickness of the thermal spraying metal alloy layer 5 is 5 mm, which improves the bonding strength between the thermal spraying metal alloy layer 5 and the substrate and avoids the problem of peeling off.

[0019] In addition, the components designed in the present utility model are all common standard components or components known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or through conventional experimental methods. Those skilled in the art can fully implement them without further elaboration. The content protected by the present utility model does not involve improvements to the internal structure and method either.

[0020] The embodiments disclosed in the present utility model are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present utility model according to the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present utility model, they are all within the protection scope of the present utility model.

Claims

1. A corrosion-resistant thermal sprayed metal alloy coating structure, comprising a metal base layer (1), characterized in that: The outer surface of the metal base layer (1) is connected to a spray base layer (3) via an adhesion layer (2), and the outer surface of the spray base layer (3) is connected to a thermally sprayed metal alloy layer (5) via a gradient material layer (4).

2. The corrosion-resistant thermal sprayed metal alloy coating structure according to claim 1, characterized in that: The thickness of the adhesion layer (2) is 0.5 mm, and the adhesion layer (2) covers the entire outer surface of the metal base layer (1).

3. The corrosion-resistant thermal sprayed metal alloy coating structure according to claim 1, characterized in that: The spray-coated base layer (3) is evenly sprayed on the outer surface of the adhesion layer (2), and the thickness of the spray-coated base layer (3) is 0.5 mm.

4. The corrosion-resistant thermal sprayed metal alloy coating structure according to claim 1, characterized in that: The gradient material layer (4) is evenly sprayed on the outer surface of the spray-coated base layer (3), and the thickness of the gradient material layer (4) is 2 mm.

5. The corrosion resistant thermal sprayed metal alloy coating structure according to claim 1, characterized in that: The thermally sprayed metal alloy layer (5) is uniformly sprayed on the outer surface of the gradient material layer (4), and the thickness of the thermally sprayed metal alloy layer (5) is 5 mm.

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