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High-corrosion-resistance composite coating and preparation method and application thereof

A composite coating and high corrosion resistance technology, applied in the field of electroplating, can solve the problems of unsatisfactory anode electrolytic corrosion resistance, affect the anode electrolytic corrosion resistance, and fail to meet the requirement of no pores, etc., to improve the salt water anode electrolytic corrosion resistance , Improve the anti-fretting friction and corrosion performance, and maintain the effect of electrical properties

Active Publication Date: 2021-12-03
万明电镀智能科技(东莞)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the precious metal content of the coating is low, the anodic electrolytic corrosion resistance is not ideal, and the structure of the combined coating is complicated, and the thickness of the precious metal coating is high, which still cannot reduce the cost of electroplating
Furthermore, the most commonly used electroplating bottom layer in electronic devices is a nickel layer, but the semi-bright nickel commonly used in the industry has a high porosity, which cannot meet the non-porous requirements of other coatings electroplated on the nickel layer, thereby affecting its resistance. Anodic electrolytic corrosion performance

Method used

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  • High-corrosion-resistance composite coating and preparation method and application thereof
  • High-corrosion-resistance composite coating and preparation method and application thereof
  • High-corrosion-resistance composite coating and preparation method and application thereof

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preparation example Construction

[0028] In a typical implementation of the present invention, the preparation method of the above-mentioned high corrosion resistance composite coating comprises the following steps:

[0029] (6) Carry out pre-plating treatment for the parts to be plated;

[0030] (7) Place the piece to be plated after the treatment in step (1) in a sulfur-free and non-porous nickel ion plating solution at 50-65° C., the piece to be plated is the cathode, and the sulfur-free and non-porous Porous nickel layer, washed with water for many times;

[0031](8) Place the piece to be plated after the treatment of step (2) in the palladium ion-nickel ion plating solution of 45-55° C., obtain a high corrosion-resistant palladium-nickel alloy layer through electrodeposition, and carry out repeated steps with deionized water cleaning;

[0032] (9) placing the treated piece to be plated in a platinum plating solution at 45-55°C through step (3), obtaining a platinum layer through electrodeposition, and c...

Embodiment 1

[0040] A composite coating with high corrosion resistance, the coating includes a nickel layer, a palladium-nickel alloy layer, a platinum layer and a hard gold layer which are sequentially electroplated on the surface of a piece to be plated. Wherein, the thickness of the nickel layer is 3.8 μm, the thickness of the palladium-nickel alloy layer is 0.8 μm, the thickness of the platinum layer is 0.4 μm, and the thickness of the hard gold layer is 0.08 μm.

[0041] The preparation method of the above-mentioned high corrosion resistance composite coating comprises the following steps:

[0042] (1) Carry out pre-plating treatment for the parts to be plated;

[0043] (2) Place the piece to be plated after the treatment in step (1) in a sulfur-free and non-porous nickel ion plating solution at 50° C., the piece to be plated is a cathode, and is deposited on the surface of the piece to be plated to obtain sulfur-free and non-porous nickel layer, washed several times with deionized w...

Embodiment 2

[0052] A high-corrosion-resistant composite coating includes a nickel layer, a palladium-nickel alloy layer, a platinum layer and a hard gold layer electroplated on the surface of a piece to be plated. The thickness of the nickel layer is 3.8 μm, the thickness of the palladium-nickel alloy layer is 1.3 μm, the thickness of the platinum layer is 0.4 μm, and the thickness of the hard gold layer is 0.08 μm.

[0053] The preparation method of the above-mentioned high corrosion resistance composite coating comprises the following steps:

[0054] (1) Carry out pre-plating treatment for the parts to be plated;

[0055] (2) Place the piece to be plated after the treatment in step (1) in a sulfur-free and non-porous nickel ion plating solution at 55° C., the piece to be plated is a cathode, and is deposited on the surface of the piece to be plated to obtain sulfur-free and non-porous nickel layers, washed several times;

[0056] (3) the piece to be plated after being processed in ste...

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Abstract

The invention relates to a high-corrosion-resistance composite coating and a preparation method and application thereof. The high-corrosion-resistance composite coating comprises a nickel layer, a palladium-nickel alloy layer, a platinum layer and a hard gold layer which are sequentially electroplated on the surface of a part to be plated, the composite coating is further provided with a protective layer, and the upper surface of the hard gold layer is coated with the protective layer. The electroplating process of the combined coating is simple, the industrial applicability is high, and the electroplating cost is low; and the composite coating is excellent in brine-resistant anode electrolytic corrosion resistance, and the wear resistance of the composite coating is remarkably improved through the protective layer. The high-corrosion-resistance composite coating is applied to surface processing of the anode terminal of the Type C charging connector and shows good brine-resistant anode electrolytic corrosion performance and wear resistance.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a composite coating with high corrosion resistance and its preparation method and application. Background technique [0002] In the electronics industry, during the use of electronic devices such as Type C and Micro-USB charging connectors, the anode signal pin terminals often suffer from severe anode electrolysis due to the entry of liquid corrosive media such as moisture, sweat or salt water. Corrosion, which in turn leads to failure of the charging function. In order to solve the anode electrolytic corrosion problem of such electronic devices, the industry found that the introduction of rhodium ruthenium coating can effectively improve its anodic electrolytic corrosion resistance, but the price of rhodium has continued to rise in recent years. According to statistics, the average price of rhodium has increased from 663USD / Ounce in 2016 It will rise to 20662USD / Ounce in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/10C25D5/16C25D5/34C25D3/12C25D3/56
CPCC25D5/10C25D5/16C25D5/34C25D3/12C25D3/56
Inventor 祁富安全成军肖家庆
Owner 万明电镀智能科技(东莞)有限公司
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