Corrosion-resistant combined coating

Abstract

The utility model relates to the technical field of electroplating, in particular to a corrosion-resistant combined coating. The corrosion-resistant combined plating layer comprises a first nickel plating layer, a second nickel plating layer, a gold plating layer, a platinum plating layer and a tin-nickel alloy plating layer which are sequentially arranged from bottom to top. And the first nickel plating layer is a nano nickel plating layer. The corrosion-resistant combined coating is formed by combining the coatings, so that the salt mist resistance, sweat wrapping resistance and sweat electrolytic corrosion resistance of a product can be effectively improved, the service life of the product is prolonged, and the environment-resistant reliability of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroplating, in particular to a corrosion-resistant combined plating layer. Background Art

[0002] In recent years, with the widespread adoption and widespread use of wearable devices such as communication interfaces, wireless headsets, smart bracelets, and smart watches, product application environments have become increasingly diverse. For example, in these harsh environments, the requirements for environmental testing and electrolytic corrosion resistance are constantly increasing. Therefore, the surface design of electronic products and components such as communication interfaces, charging shrapnel, earbuds, and tail plugs is characterized by high-performance coating structures to improve the product's corrosion resistance, sweat coating resistance, and sweat electrolytic corrosion resistance to meet market demand. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the present invention aims to provide a

[0004] The corrosion-resistant combined coating can be attached to the surface of a substrate made of copper, stainless steel or other materials to improve the substrate's resistance to salt spray, sweat encapsulation and sweat electrolytic corrosion, thereby increasing the product's service life.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a corrosion-resistant combined plating layer, including a first nickel plating layer, a second nickel plating layer, a gold plating layer, a platinum plating layer and a tin-nickel alloy plating layer arranged in sequence from bottom to top; the first nickel plating layer is a nano nickel plating layer.

[0006] Furthermore, the thickness of the first nickel plating layer is 0.5-1.0 μm.

[0007] Furthermore, the thickness of the second nickel plating layer is not less than 2.0 μm.

[0008] Furthermore, the thickness of the second nickel plating layer is 2.0-5.0 μm.

[0009] Furthermore, the thickness of the gold plating layer is not less than 0.075 μm.

[0010] Furthermore, the thickness of the gold plating layer is 0.075-2.0 μm.

[0011] Furthermore, the thickness of the platinum coating is not less than 0.25 μm.

[0012] Furthermore, the thickness of the platinum coating is 0.25-3.0 μm.

[0013] Furthermore, the thickness of the tin-nickel alloy plating layer is not less than 0.25 μm.

[0014] Furthermore, the thickness of the tin-nickel alloy plating layer is 0.25-3.0 μm.

[0015] The beneficial effects of the present invention are as follows: the corrosion-resistant composite coating of the present invention sequentially arranges a first nickel coating, a second nickel coating, a gold coating, a platinum coating, and a tin-nickel alloy coating on the surface of a substrate, wherein the first nickel coating is a nano-nickel coating, which increases the density of the composite coating; the second nickel coating increases the thickness of the composite coating and reduces the porosity; the gold coating strengthens the bonding between the platinum coating and the second nickel coating; the platinum coating improves the product's resistance to electrolytic corrosion caused by sweat; and the tin-nickel alloy coating improves the product's resistance to salt spray and sweat encapsulation. The present invention forms a corrosion-resistant composite coating through the above-mentioned coating combination, which can effectively improve the product's resistance to salt spray, sweat encapsulation, and sweat electrolytic corrosion, extend the product's service life, and improve the product's environmental reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the connection between the corrosion-resistant composite plating layer and the terminal of the utility model.

[0017] The reference numerals are: 11, first nickel plating layer; 12, second nickel plating layer; 13, gold plating layer; 14, platinum plating layer; 15, tin-nickel alloy plating layer; 16, substrate. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of those skilled in the art, the following embodiments and accompanying drawings are provided. Figure 1 To further illustrate the present invention, the contents mentioned in the implementation manner are not intended to limit the present invention.

[0019] like Figure 1 As shown, a corrosion-resistant composite coating includes a first nickel coating 11, a second nickel coating 12, a gold coating 13, a platinum coating 14 and a tin-nickel alloy coating 15 arranged in sequence from bottom to top; the first nickel coating 11 is a nano nickel coating.

[0020] The corrosion-resistant composite coating of the present invention is a tin-nickel-platinum-plated corrosion-resistant composite coating. The composite coating comprises a first nickel coating 11, a second nickel coating 12, a gold coating 13, a platinum coating 14, and a tin-nickel alloy coating 15, sequentially disposed on the surface of a substrate 16. The first nickel coating 11 is a nano-nickel coating, which increases the density of the composite coating. The second nickel coating 12 is a conventional nickel coating, which increases the thickness of the composite coating and reduces porosity. The gold coating 13 enhances the bonding between the platinum coating 14 and the second nickel coating 12. The platinum coating 14 enhances the product's resistance to electrolytic corrosion caused by sweat. The tin-nickel alloy coating 15 enhances the product's resistance to salt spray and sweat encapsulation. Through the aforementioned coating combination, the present invention effectively enhances the product's resistance to salt spray, sweat encapsulation, and sweat electrolytic corrosion, extending the product's service life and improving its environmental reliability.

[0021] Furthermore, the thickness of the first nickel plating layer 11 is 0.5-1.0 μm. In this embodiment, the first nickel plating layer 11 is configured as a nano-nickel plating layer. The nano-nickel plating layer reduces metal nickel ions into nanoparticles through an electrochemical reaction and deposits them on the surface of the object, thereby improving the hardness, wear resistance, and corrosion resistance of the surface of the substrate 16. By using a nano-nickel plating layer of the above thickness, it is helpful to increase the density of the combined plating layer while taking into account production costs.

[0022] Furthermore, the thickness of the second nickel plating layer 12 is not less than 2.0 μm. Furthermore, the thickness of the second nickel plating layer 12 is 2.0-5.0 μm. The second nickel plating layer 12 is a common nickel plating layer, which helps to increase the thickness of the combined plating layer, reduce porosity, and reduce the production cost of the combined plating layer.

[0023] Furthermore, the thickness of the gold plating layer 13 is not less than 0.075 μm. Furthermore, the thickness of the gold plating layer 13 is 0.075-2.0 μm.

[0024] Furthermore, the thickness of the platinum-gold coating 14 is not less than 0.25 μm. Furthermore, the thickness of the platinum-gold coating 14 is 0.25-3.0 μm.

[0025] Furthermore, the thickness of the tin-nickel alloy plating layer 15 is not less than 0.25 μm. Furthermore, the thickness of the tin-nickel alloy plating layer 15 is 0.25-3.0 μm.

[0026] This embodiment, by designing the thickness of each layer in the electroplated coating, helps reduce costs and control the quality of the combined coating, preventing individual layers from being too thin, resulting in substandard performance, and preventing individual layers from being too thick, resulting in excessively high costs. By employing the aforementioned combination of layer thicknesses, this embodiment can achieve a combined coating with excellent corrosion resistance and overall performance.

[0027] Furthermore, the thickness of the first nickel plating layer 11 is 0.5-1.0 μm. In this embodiment, the first nickel plating layer 11 is configured as a nano-nickel plating layer. The nano-nickel plating layer reduces metal nickel ions into nanoparticles through an electrochemical reaction and deposits them on the surface of the object, thereby improving the hardness, wear resistance, and corrosion resistance of the surface of the substrate 16. By using a nano-nickel plating layer of the above thickness, it is helpful to increase the density of the combined plating layer while taking into account production costs.

[0028] More preferably, the thickness of the second nickel plating layer 12 is not less than 2.0 μm. Furthermore, the thickness of the second nickel plating layer 12 is 2.0-5.0 μm.

[0029] Furthermore, the thickness of the gold plating layer 13 is not less than 0.075 μm. Furthermore, the thickness of the gold plating layer 13 is 0.075-2.0 μm.

[0030] Furthermore, the thickness of the platinum-gold coating 14 is not less than 0.25 μm. Furthermore, the thickness of the platinum-gold coating 14 is 0.25-3.0 μm.

[0031] Furthermore, the thickness of the tin-nickel alloy plating layer 15 is not less than 0.25 μm. Furthermore, the thickness of the tin-nickel alloy plating layer 15 is 0.25-3.0 μm.

[0032] Preferably, the thickness of the first nickel plating layer 11 is 0.5 μm; the thickness of the second nickel plating layer 12 is 2.0 μm; the thickness of the gold plating layer 13 is 0.075 μm; the thickness of the platinum plating layer 14 is 0.25 μm; and the thickness of the tin-nickel alloy plating layer 15 is 1.0 μm.

[0033] This embodiment employs the aforementioned corrosion-resistant combined coating and has been successfully used on stainless steel headphone shrapnel. The corrosion-resistant combined coating of this embodiment was electroplated onto the surface of the headphone shrapnel and subjected to corrosion resistance testing. According to GB / T 2423.17-2008, the coating remained intact after 128 hours of salt spray exposure. It also remained intact after 128 hours of sweat exposure, and the sweat electrolysis test, at 5V / 5min, demonstrated excellent corrosion resistance. All tests met market requirements.

[0034] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the scope of protection of the present invention.

Claims

1. A corrosion-resistant composite coating, characterized in that: The invention comprises a first nickel plating layer, a second nickel plating layer, a gold plating layer, a platinum plating layer and a tin-nickel alloy plating layer which are arranged in sequence from bottom to top; the first nickel plating layer is a nano nickel plating layer.

2. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the first nickel plating layer is 0.5-1.0 μm.

3. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the second nickel plating layer is not less than 2.0 μm.

4. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the second nickel plating layer is 2.0-5.0 μm.

5. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the gold plating layer is not less than 0.075 μm.

6. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the gold plating layer is 0.075-2.0 μm.

7. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the platinum coating is not less than 0.25 μm.

8. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the platinum coating is 0.25-3.0 μm.

9. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the tin-nickel alloy plating layer is not less than 0.25 μm.

10. The corrosion-resistant composite coating according to claim 1, characterized in that: The thickness of the tin-nickel alloy plating layer is 0.25-3.0 μm.

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