Process method for electroplating nickel on aluminum-copper composite material component

Abstract

The invention discloses a process method for electroplating nickel on an aluminum-copper composite material component. The process method can be utilized to obtain a nickel-coated layer with good binding force on the surface of the aluminum-copper composite material component. The process method is realized by the following steps: (a), alkaline corrosion; (b), bright dipping, wherein a clean basal body is obtained by primary bright dipping and secondary bright dipping; (c), zinc immersion, wherein a layer of zinc is uniformly immersed and coated for the aluminum-copper composite material component in sodium hydroxide, zinc oxide, tartrate, ferric trichloride and sodium nitrate solution; and (d), nickel plating, wherein an uniform nickel layer is deposited on the surface of the aluminum-copper composite material component in citrate solution by using an aluminum-copper composite material as a cathode and galvanizing with cathode current. According to the process method disclosed by the invention, the nickel-plating liquor is stable in component, good in dispersing capability, small in corrosion to aluminum base of the aluminum-copper composite material and capable of effectively avoiding corrosion of the aluminum-copper composite material in an nickel-electroplating process, so that a problems of corrosion to aluminum layer substrate and the aluminum-copper composite part and poor binding force with a coating when the aluminum-copper composite material is electroplated with nickel are solved.

Description

[0001] technical field [0002] The invention relates to a process method for electroplating nickel on the surface of an aluminum-copper composite material component. After being treated by this method, a uniform layer of nickel plating is deposited on the surface of the aluminum-copper composite material, and the aluminum-copper composite is made after nickel plating and silver plating. The material has excellent welding properties. Background technique [0003] The aluminum-copper composite material with high heat dissipation performance is mainly used in the field of electric power and heat transfer engineering materials to replace aluminum and copper single-material materials, and combines the advantages of low density, easy molding, and low price with high thermal conductivity and strength of aluminum and copper Combined to meet the needs of high-tech products, promote the development of science and technology, and manufacture new composite materials for high-end radiat...

AI Technical Summary

Problems solved by technology

When the traditional process is used to process the aluminum-copper composite material, the pretreatment of the copper layer substrate of the aluminum-copper composite material and the aluminum-copper composite part is not thorough enough, which may easily cause the nickel plating layer to bond with the copper layer substrate of the aluminum-copper composite material and the aluminum-copper composite part. Insufficient strength, especially when the aluminum-copper composite material is electroplated with nickel, the aluminum layer substrate and the aluminum-copper composite parts such as: the edge, the hole wall are easy to corrode, and the poor bonding force between the nickel-plated layer and the aluminum-copper composite material matrix is ​​particularly prominent; The PH value of the solution is controlled in the range of 3 to 6. In the case where there are defects in the copper layer matrix of the aluminum-copper composite material and the zinc-impregnated layer of the aluminum-copper composite part, the acidity of the bath solution in the subsequent nickel plating process is likely to cause aluminum-copper composites. Corrosion of the material aluminum layer matrix and aluminum-copper composite parts, resulting in the scrapping of aluminum matrix composite components