Electroplating preparation method for copper cladded aluminum wire or copper cladded magnesium alloy wire

Abstract

The invention discloses a process for preparing copper cladding aluminum or copper cladding wire of aluminum magnesium alloy, which utilizes a continuous striking-wire copper plating pipeline of being in series connection with a plurality of lengthening electric plating aluminum-magnesium parts plating groove, sets out line uninterruptedly between adjacent plating grooves, and arranges a transiting water ditch between front groove and rear groove which can avoid wire to contact with air to generate oxide coating when changing the grooves. A problem of burning wire can be resolved by adjusting main plating current to about 300 A before having to shutdown in short time. Simultaneously, the invention employs technique of thickening dip galvanized coating and wiping off zinc cover of the zinc dipping by pickling to overcome the main difficulty of utilizing electric plating method to produce copper cladding aluminum wire or copper cladding wire of aluminum magnesium alloy. Compared with coating method, the invention has the advantages of great binding force between metals, high concentricity of copper layer and core wire, low production cost on producing high tensile strength and high stretch rate production, low reject rate, low product specific gravity and the like, and is a good method for producing copper cladding aluminum wire and copper cladding wire of aluminum magnesium alloy by the electroplating method.

Description

technical field [0001] The invention relates to a preparation method for producing copper-clad aluminum-magnesium alloy wire by using an electroplating method, and belongs to the field of electroplating. Background technique [0002] Due to the rapid development of the global economy in recent years, the demand for copper, especially the demand for copper in the wire and cable market, is increasing day by day. In addition, the mineral resources of copper are decreasing year by year, which has caused the price of copper to rise continuously in recent years. Substitute products of copper, such as the preparation method of copper-clad steel braided thin wire (seeing patent application number: 200610040893.8), copper-clad aluminum-magnesium alloy wire and its preparation method (seeing patent application number: 200510040343.1), etc., use a small amount of copper and Other metals are combined to make products to replace copper, so as to reduce the consumption of copper and reduc...

AI Technical Summary

Problems solved by technology

[0005] 3. During the test, if the second galvanizing is carried out according to the conventional process formula of aluminum electroplating: zinc oxide (ZnO) 20g / L, sodium hydroxide (NaOH) 120g / L, and the adaptation temperature is 15-30 degrees Celsius, The residence time is 20-40 seconds. After a large number of tests, it is found that if the product produced according to the above data has no problems on the surface, that is to say, if it is electroplated on aluminum parts, it is considered a qualified product, but the wire rod after electroplating is shrinking during drawing. Decopper phenomenon occurs when the length of the diameter extends to about 10 times, which means that the bonding fastness between the metals is not enough