CN212505071U

CN212505071U - High-wear-resistance corrosion-resistant composite coating for steel surface

Info

Publication number: CN212505071U
Application number: CN202020891677.XU
Authority: CN
Inventors: 孙华敏; 徐英君; 赵东军
Original assignee: Suzhou Hanyi Chemical Co ltd
Current assignee: Suzhou Hanyi Chemical Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-02-09
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to a high wear-resistant and corrosion-resistant composite coating for steel surface, which comprises a steel matrix and a composite coating structure on the surface of the matrix. The composite plating layer structure on the surface of the steel matrix comprises the following components in sequence from inside to outside: semi-bright nickel coating, Ni-Cu-P chemical nickel coating, Ni-P-nano ZrO coating₂And (4) chemical nickel plating. Wherein the semi-gloss nickel platingThe layer has excellent corrosion resistance; the bright nickel plating layer can increase the hardness of the composite plating layer structure, and because the sulfur content is different between the semi-bright nickel plating layer and the bright nickel plating layer, the potential difference exists between the plating layers, so that the corrosion resistance is increased; the Ni-P chemical plating layer has good corrosion resistance, and the addition of Cu can obviously reduce the porosity of the plating layer and further improve the corrosion resistance; adding nano ZrO in Ni-P chemical plating layer₂Can effectively improve the hardness of the plating layer structure and improve the wear resistance. Therefore, the composite plating layer has the characteristics of low porosity, compact structure, good corrosion resistance, strong wear resistance and the like, and can obviously improve the wear resistance and corrosion resistance of steel.

Description

High-wear-resistance corrosion-resistant composite coating for steel surface

Technical Field

The utility model relates to a metal surface composite coating, in particular to a high-wear-resistance composite coating for steel surfaces.

Background

As the most important metal material with the largest dosage in the technical field of engineering, the material failure caused by abrasion, corrosion and the like is always an important reason for influencing the use and causing economic loss. The composite plating layer technology is one of the common means for improving the surface performance of materials, and the addition of the composite plating layer on the surface of steel to improve the wear resistance and the corrosion resistance is an effective way for solving the problem.

The chemical plating Ni-P alloy has the characteristics of simple process, low cost, uniform plating layer, wear resistance, corrosion resistance and the like, and is widely applied to the fields of chemical engineering, materials and the like. With the improvement of the requirements on the performance of the plating layer, the doping of other metals in the chemical plating Ni-P alloy is gradually a hot point of research. The copper doping can obviously reduce the porosity of the plating layer and improve the corrosion resistance. The alloy plating layer is used on the surface of the steel, so that the corrosion resistance of the steel in a severe environment can be improved, and the service life of the material can be prolonged.

With the development of the science of nano materials, people combine the nano materials with a composite plating technology to form a nano composite plating technology. The nano particles are used for replacing micro particles in the traditional composite plating, so that the strengthening effect can be enhanced, and the method has a good application prospect. Adding nano ZrO into Ni-P chemical plating solution₂Particles of nano-ZrO₂The particles have the characteristics of stable chemical property, high hardness, strong corrosion resistance and the like, and can be uniformly distributed in the Ni-P plating layer to further improve the thermal stability, the wear resistance and the corrosion resistance of the composite plating layer.

Disclosure of Invention

The utility model aims at designing a composite coating with high wear resistance and high corrosion resistance which can be suitable for the surface of steel.

The utility model discloses a realize that the technical scheme that above-mentioned purpose was taken is:

high-wear-resistance corrosion-resistant composite coating for steel surface and bagComprises a steel matrix and a composite plating layer structure on the surface of the matrix. The composite plating layer structure on the surface of the steel matrix comprises the following components in sequence from inside to outside: semi-bright nickel coating, Ni-Cu-P chemical nickel coating, Ni-P-nano ZrO coating₂And (4) chemical nickel plating.

By the technical scheme, the semi-gloss nickel coating has excellent corrosion resistance; the bright nickel plating layer can increase the hardness of the composite plating layer structure, and because the sulfur content is different between the semi-bright nickel plating layer and the bright nickel plating layer, the potential difference exists between the plating layers, so that the corrosion resistance is increased; the Ni-P chemical plating layer has good corrosion resistance, and the addition of Cu can obviously reduce the porosity of the plating layer and further improve the corrosion resistance; adding nano ZrO in Ni-P chemical plating layer₂Can effectively improve the hardness of the plating layer structure and improve the wear resistance. The composite coating adopts semi-bright nickel, Ni-Cu-P chemical nickel and Ni-P-nano ZrO₂The coating structure of the chemical nickel, the semi-bright nickel and bright nickel of the inner layer are combined with the steel matrix with high strength and good corrosion resistance; the Ni-Cu-P chemical nickel in the middle layer has a compact structure and high corrosion resistance; Ni-P-nano ZrO of outer layer₂Chemical nickel has high wear resistance, high corrosion resistance and high hardness. Therefore, the utility model provides a can be applicable to the high wearability on steel surface, the compound cladding material of high corrosion resistance, improve the corrosion resisting property of steel in harsh environment, extension material life.

The utility model discloses a further technical scheme is:

the semi-gloss nickel plating layer is obtained by electroplating a semi-gloss nickel plating solution, and the thickness of the plating layer is 10-15 mu m.

The bright nickel plating layer is obtained by electroplating bright nickel plating solution, and the thickness of the plating layer is 5-10 mu m.

The Ni-Cu-P chemical nickel plating layer is obtained by doping copper sulfate in Ni-P chemical plating solution, wherein the doping amount of the copper sulfate is 5-10%, and the thickness of the copper sulfate is 10-15 mu m.

The Ni-P-nano ZrO₂The chemical nickel coating is prepared by doping Ni-P chemical plating solution with nano ZrO₂Particles are obtained, in which the nano-ZrO₂The doping amount of the particles is 5-10%, and the thickness is 10-20 μm.

Drawings

FIG. 1 is a schematic structural diagram of the composite coating of the present invention;

in the figure: 1. Ni-P-nano ZrO₂Chemical nickel; 2. Ni-Cu-P chemical nickel plating; 3. bright nickel coating; 4. a semi-gloss nickel plating layer; 5. a steel matrix.

Detailed Description

The following description will further explain embodiments of the present invention with reference to the drawings.

As shown in figure 1, the high-wear-resistance composite coating for the steel surface consists of a steel substrate 5 and a composite coating on the steel substrate 5. Wherein, the composite coating structure is from inside to outside in proper order: an inner semi-bright nickel coating 4, a bright nickel coating 3, a Ni-Cu-P chemical nickel coating 2 and an outer Ni-P-nano ZrO₂Electroless nickel plating 1.

In the embodiment, the thickness of the semi-gloss nickel coating is 10-15 μm; the thickness of the bright nickel plating layer is 5-10 μm; the doping amount of copper sulfate in the Ni-Cu-P chemical nickel plating layer is 5-10%, and the thickness is 10-15 mu m; Ni-P-nano ZrO₂Nano ZrO in chemical nickel coating₂The doping amount of the particles is 5-10%, and the thickness is 10-20 μm. The total thickness of the composite plating layer is 35-60 mu m, the hardness of the plating layer is 700-900HV, and the salt spray resistance test time exceeds 200 hours.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art will be able to read the equivalent structure changes made by the description and the drawings of the present invention, and all the changes are included in the scope of the present invention.

Claims

1. A high wear-resistant corrosion-resistant composite coating for steel surfaces is characterized in that: the composite plating layer structure on the surface of the steel matrix comprises the following components in sequence from inside to outside: semi-bright nickel coating, Ni-Cu-P chemical nickel coating, Ni-P-nano ZrO coating₂And (4) chemical nickel plating.

2. The high wear and corrosion resistant composite coating for steel surfaces according to claim 1, characterized in that: the semi-gloss nickel plating layer is obtained by electroplating a semi-gloss nickel plating solution, and the thickness of the plating layer is 10-15 mu m.

3. The high wear and corrosion resistant composite coating for steel surfaces according to claim 1, characterized in that: the bright nickel plating layer is obtained by electroplating bright nickel plating solution, and the thickness of the plating layer is 5-10 mu m.

4. The high wear and corrosion resistant composite coating for steel surfaces according to claim 1, characterized in that: the Ni-Cu-P chemical nickel plating layer is obtained by doping copper sulfate in a chemical nickel plating solution, wherein the doping amount of the copper sulfate is 5-10%, and the thickness of the copper sulfate is 10-15 mu m.

5. The high wear and corrosion resistant composite coating for steel surfaces according to claim 1, characterized in that: the Ni-P-nano ZrO₂The chemical nickel coating is formed by doping chemical nickel plating solution with nano ZrO₂Particles are obtained, in which the nano-ZrO₂The doping amount of the particles is 5-10%, and the thickness is 10-20 μm.