An integrated surface treatment method of titanium metal and plastic and its composite product

Abstract

A titanium and plastic integrated surface treatment method comprises the following steps that degreasing is conducted; acid corrosion is conducted; dust removal is conducted; activation is conducted,an oxidation film layer generated on the surface of a titanium workpiece during pretreatment is removed, meanwhile, secondary oxidation is delayed, and the binding force between a binding layer and atitanium substrate prepared during post-treatment is ensured; the titanium workpiece serves as an anode to be put into an electrolysis working solution which comprises phosphoric acid and electrolyticadjusting liquid, and through electrolysis, the binding layer which is well combined with the substrate and has a micropore structure with the diameter being 30-60 nm can be obtained on the surface of the titanium workpiece; primary immersion cleaning is conducted; secondary immersion cleaning is conducted, and a layer of adsorption filling film is formed in each micropore of the binding layer; and drying is conducted. According to the titanium and plastic integrated surface treatment method, the defects that titanium is high in surface activity and prone to oxidation during pretreatment areovercome, the ideal multi-pore binding layer is formed on the surface of the titanium through special electrolytic oxidation and post-treatment, the binding strength of the binding layer and the titanium substrate is ensured, and in addition, the integrated requirements of the heat flow plastic and the binding layer during injection molding are met.

Description

technical field [0001] The invention belongs to the surface treatment process of titanium metal, and relates to an innovative surface treatment method in which titanium and titanium alloy materials are integrated with plastic to finally form a titanium-plastic composite product. The method realizes a tight and firm combination between titanium metal and plastic. Background technique [0002] The application of metal and plastic integration technology on aluminum, copper, iron, stainless steel and other metal materials is relatively mature, and is widely used in parts of automobiles, household appliances, and electronic products. Titanium metal has become the preferred material for high-end products due to its high specific strength, high corrosion resistance and light weight. However, there is currently no mature treatment process for titanium and titanium alloy materials that can achieve integrated integration with plastics. Therefore, its industrial application is greatly ...

AI Technical Summary

Problems solved by technology

[0011] (2) Titanium alloy anodization: The characteristic is that it cannot form a nano-scale porous bonding layer during anodic oxidation like aluminum alloy, and the surface activity is very poor, and because the chemical properties of the titanium metal surface are extremely active, the oxidized bonding layer formed and titanium The metal substrate is not firmly bonded, so there is basically no bonding force between titanium and plastic after injection molding, and it is easy to degumming and separation

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