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Method for plating gold on surface of titanium alloy

A surface gold plating, titanium alloy technology, applied in the field of titanium alloy surface gold plating, can solve the problem of poor bonding force of the film base and achieve the effect of improving the bonding force of the coating

Pending Publication Date: 2022-03-22
XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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Problems solved by technology

[0004] The invention provides a method for gold plating on the surface of titanium alloy, which solves the problem of poor film-base binding force of titanium alloy electroplating nickel and gold

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  • Method for plating gold on surface of titanium alloy
  • Method for plating gold on surface of titanium alloy

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Please refer to figure 1 , figure 2 ,in, figure 1 A schematic diagram of the surface morphology of the titanium alloy after acid etching of the method for gold plating on the surface of the titanium alloy provided by the present invention; figure 2 It is a schematic cross-sectional view of a nickel-plated gold layer on a titanium alloy after heat treatment in the method for gold-plated titanium alloy surface provided by the present invention. The method for gold plating on the surface of titanium alloy comprises the following steps:

[0021] First, put a 30×50×2mm titanium alloy plate made of Ti6Al4V into a solution with a mass concentration of 15% sodium hydroxide + 20% sodium bicarbonate for alkaline cleaning at 60°C for 8 minutes, rinse and soak in pure water for later use , and then put the degreased titanium plate into the oxalic acid ...

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Abstract

The invention provides a method for plating gold on the surface of a titanium alloy. The method comprises the following steps that S1, a titanium alloy matrix is pretreated; s2, preparing a transition nickel layer; and S3, preparing an electrogilding layer. According to the method for plating gold on the surface of the titanium alloy, the acid etching procedure is added in the front oil removal process of the titanium alloy, then the surface roughness of the titanium alloy base material is increased through hydrochloric acid activating treatment, and then the surface of the titanium alloy base material is coated with the nickel intermediate transition layer and the surface gold layer; and hydrogen removal treatment and low-temperature heat treatment are continued after plating, so that a solid solution is formed between the plating layer and the substrate. Due to the fact that the thermal expansion coefficients of the plating layer and the base body are different, the gap between the plating layer and the base body is large, nickel ions and gold ions in the plating layer migrate in the heat treatment process, a thick diffusion layer can be formed between the plating layer and the base body, the expansion coefficients of the plating layer and the base body tend to be consistent, and finally the gap between the plating layer and the base body becomes small at high temperature. And a metal bond is formed between the coating and the substrate, so that the coating binding force is improved.

Description

technical field [0001] The invention relates to the field of gold plating on the surface of titanium alloys, in particular to a method for gold plating on the surface of titanium alloys. Background technique [0002] Titanium alloy has the advantages of low density, high strength and high temperature resistance, good heat transfer performance and adsorption performance. Titanium alloy is widely used in aerospace, biomedical, petrochemical and other fields. However, it is easy to lose at high temperature and react with oxygen in the atmosphere, which limits the full utilization of titanium alloys. In order to improve the application range of titanium alloy, it is necessary to carry out some surface treatment on the surface of titanium alloy. At present, the commonly used surface treatment technologies for titanium alloy include chemical conversion coating, arc spraying, plasma infiltration, electroplating, anodic oxidation and other methods. These methods have their own advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/48C25D5/38C25D5/10C25D5/48C25D5/50
CPCC25D3/48C25D5/38C25D5/10C25D5/48C25D5/50
Inventor 王宇飞冯庆王飞杨晨杨文波宋瑞
Owner XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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