Anti-corrosion compound copper-based microwire and preparation method thereof

Abstract

The invention relates to an anti-corrosion compound copper-based microwire and a preparation method thereof. The anti-corrosion compound copper-based microwire is composed of an alloy layer and a graphene layer wrapped on the outer portion of the alloy layer. The alloy layer is a copper-based alloy layer, and main components of the alloy layer include copper, silver and / or rare earth elements. A directionally-solidified cast rod is prepared through a horizontal continuous directional solidification method, then the directionally-solidified cast rod is subjected to continuous cold drawing tillthe diameter is smaller than 0.05 mm, the directionally-solidified cast rod is then coated with graphene water-based acrylic acid anti-corrosion paint, and the anti-corrosion compound copper-based microwire is prepared. Compared with the prior art, the tensile strength of the anti-corrosion compound copper-based microwire can be increased; and by using a novel anti-corrosion coating, the environmental protection performance is achieved, conductivity of the anti-corrosion compound copper-based microwire is not reduced, the finally-prepared compound copper-based microwire meets the requirement of maritime environment corrosion resistance, and the anti-corrosion compound copper-based microwire and the preparation method can be applied on a large scale.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a corrosion-resistant composite copper-based fine wire and a preparation method thereof. Background technique [0002] Micro wires refer to wires with a diameter of 0.05mm or less, which are widely used in industrial products such as 3C products, micro motors and electro-acoustic equipment. has an important impact. With the trend of the domestic development of Industry 4.0, the market demand for micro wires is increasing year by year. Many offshore projects have installed smart equipment and electro-acoustic equipment, and the performance of the micro-wire determines the life of the equipment and the normal operation of the equipment to a certain extent. Working in seawater atmosphere for a long time will easily cause pitting corrosion, crevice corrosion, etc., and the wire will be damaged directly or indirectly to varying degrees as time goes by. At present, the widely used...

AI Technical Summary

Problems solved by technology

The simple use of graphene anti-corrosion coating has many limitations: high quality requirements for graphene, once the film has slight defects, it will aggravate metal corrosion, and can only provide short-term anti-oxidation and corrosion performance; different options for metal substrates There are many, high requirements for equipment; it is difficult to prepare large-scale and large-area, and it is difficult to industrialize

However, materials such as graphene in this patent are mainly used as a reinforcing phase, not as a surface coating to play a role in corrosion resistance, and the composition of the metal material in this patent is not clearly specified

[0009] Chinese patent CN207149306U discloses a graphene wire, including a wire core, the outer layer of the wire core is covered with a graphene layer, the outer layer of the graphene layer is covered with an insulating layer, and the outer layer of the insulating layer is covered with graphene semiconducting Insulation layer; when the wire conducts electricity, the electrons are distributed and transmitted on the surface of the wire, and the wire core is covered with a graphene layer with good electrical and thermal conductivity, which can greatly improve the electrical conductivity of the wire, and at the same time solve the problem that the high cost of graphene is not easy to popularize and use in Problems in the field of power transmission

Similarly, in this patent, the conductivity is improved by coating graphene, which does not play a role in corrosion resistance.

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