Impeller nano metal ceramic coating resistant to erosive wear and cavitation corrosion

Abstract

The invention provides an anti-erosive-wear and anti-cavitation-corrosion impeller nano metal ceramic coating which comprises a base coat, a bonding layer and a metal ceramic layer which are sequentially arranged from inside to outside, and an impeller body is coated with the base coat. The bottom layer can be made of nickel-chromium coating, and the metal ceramic layer comprises nano metal particles and nano ceramic particles. The anti-erosive wear and anti-cavitation corrosion impeller nano metal ceramic coating has the advantages of cavitation corrosion resistance, wear resistance, seawater corrosion resistance and the like, after the impeller body is coated with the coating, the wear resistance and corrosion resistance of the impeller in the using process can be effectively enhanced, and the stability of the impeller in the using process is improved; and the service life of the impeller is prolonged.

Description

Technical Field

[0001] The invention relates to the field of iron and steel metallurgy, and in particular to an impeller nano-metal ceramic coating which is resistant to erosion, wear and cavitation corrosion. Background Art

[0002] The impeller refers to the wheel with moving blades, which is a component of the impulse turbine rotor. The unevenness of the gas flow in the impeller accelerates or contacts with corrosive liquids (such as seawater) to cause wear. The impeller wall will become thinner due to wear, and cavitation corrosion will occur on the blade surface, which will affect the stability and reliability of the impeller during operation, as well as the service life of the impeller. Therefore, it is a very worthy research issue to produce a coating that can effectively improve the anti-erosion wear and anti-cavitation corrosion effect of the impeller. Summary of the invention

[0003] The object of the present invention is to provide an impeller nano-metal ceramic coating that is resistant to erosion, wear and cavitation corrosion, and solves one or more of the above-mentioned problems in the prior art.

[0004] The present invention provides an impeller nano-metal ceramic coating that is resistant to erosion, wear and cavitation corrosion, comprising a primer layer, an adhesive layer and a metal ceramic layer arranged in sequence from the inside to the outside, wherein the primer layer is coated on the impeller body.

[0005] In some embodiments, the primer layer is nickel-chromium paint.

[0006] In some embodiments, the metal-ceramic layer contains nano-metal particles and nano-ceramic particles.

[0007] In some embodiments, the impeller body includes a hub and a plurality of blades disposed around the hub.

[0008] In some embodiments, the erosion-resistant, wear-resistant and cavitation-resistant impeller nano-metal ceramic coating is sprayed onto the impeller body by supersonic spraying.

[0009] The advantages of the impeller nano-metal ceramic coating that is resistant to erosion, wear and cavitation corrosion described in the present invention are: the coating has the effects of anti-cavitation corrosion, wear resistance and seawater corrosion resistance. After the coating is applied to the impeller body, it can effectively enhance the wear resistance and corrosion resistance of the impeller during use, improve the stability of the impeller during use, and the service life of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram of the structure of an impeller nano-metal ceramic coating that resists erosion, wear and cavitation erosion in some embodiments of the present invention; Figure 2 Schematic diagram of the structure of the impeller body in some other embodiments of the present invention. DETAILED DESCRIPTION

[0011] In order to further clearly explain the purpose, technical solutions and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings. The accompanying drawings of the present invention are for the purpose of simple and easy-to-read structural framework diagrams and cannot limit the true purpose of the present invention.

[0012] Combination Figure 1 and Figure 2 As shown in the content, this embodiment proposes an impeller nano-metal ceramic coating that is resistant to erosion, wear and cavitation corrosion, including a base layer 201, an adhesive layer 202 and a metal ceramic layer 203 coated in sequence from the inside to the outside, the base layer 201 is coated on the impeller body 1, the base layer 201, the adhesive layer 202 and the metal ceramic layer 203.

[0013] In some specific implementations, the primer layer 201 may be formed by coating with a nickel-chromium coating.

[0014] In some specific implementations, the metal ceramic layer 203 contains nano-metal particles and nano-ceramic particles.

[0015] The impeller body 1 includes a hub 101 and a plurality of blades 102 arranged around the hub 101 .

[0016] The impeller nano-metal ceramic coating that is resistant to erosion, wear and cavitation corrosion is sprayed onto the impeller body 1 by supersonic spraying.

[0017] The above undisclosed matters can be directly implemented by using existing technologies, so they will not be elaborated here.

[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several similar modifications and improvements without departing from the creative concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A nano-metal ceramic coating for an impeller that resists erosion, wear and cavitation erosion, characterized in that: It comprises a primer layer, a bonding layer and a metal ceramic layer which are arranged in sequence from the inside to the outside, and the primer layer is coated on the impeller body.

2. The impeller nano-metal ceramic coating that resists erosion, wear and cavitation erosion according to claim 1 is characterized in that: The base layer is nickel-chromium paint.

3. The impeller nano-metal ceramic coating that resists erosion, wear and cavitation erosion according to claim 1 is characterized in that: The metal ceramic layer contains nano metal particles and nano ceramic particles.

4. The impeller nano-metal ceramic coating that resists erosion, wear and cavitation erosion according to claim 1 is characterized in that: The impeller body comprises a hub and a plurality of blades arranged around the hub.

5. The impeller nano-metal ceramic coating that resists erosion, wear and cavitation erosion according to claim 1 is characterized in that: The impeller nano-metal ceramic coating that resists erosion, wear and cavitation corrosion is sprayed onto the impeller body by supersonic spraying.

Images