Coarsening liquid for dispersion aluminum-copper composite material and surface nickel plating method thereof

Abstract

The invention provides a coarsening liquid for a metal composite material and a surface nickel plating method thereof, and is mainly used for coarsening and nickel plating of dispersion aluminum-copper. The coarsening liquid comprises the following components in percentage by weight of 1%-10% of sulfuric acid, 1%-20% of hydrogen peroxide, 0.2%-0.6% of alcohols, 0.1%-0.8% of carbamide peroxide, 0.1%-0.6% of glycerin and 62%-97.6% of water. The surface nickel plating method comprises the steps of sequentially performing oil removal, coarsening, acid washing, activation, acid washing and electroless nickel plating on the surface of the composite material, wherein in the coarsening step, the composite material is subjected to chemical coarsening treatment in the coarsening liquid. The coarsening liquid adopts the mixing of strong oxidizing agent and strong acid, so that the problems that after traditional chromium acid treatment or sand blasting treatment, the position of dispersion aluminum can not be activated, the copper bite reaction rate is not controllable, and the coating can not pass the 850 DEG C high-temperature welding temperature examination are solved; and the impurities on the surface of the dispersion aluminum-copper composite material can be oxidized and dissolved, and various organic substances and inorganic substances can be adsorbed, so that the surface of the dispersion aluminum-copper composite material can be cleaned, coarsened and hydrophilic, and the plating efficiency and quality are improved.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of dispersed aluminum-copper composite materials, and in particular relates to a roughening solution for dispersed aluminum-copper composite materials and a surface nickel plating method thereof. Background technique [0002] Copper is the earliest metal used by humans. It has high electrical conductivity, thermal conductivity and excellent processing performance. However, pure copper has low room temperature strength and high temperature strength, which is difficult to meet actual needs. Therefore, how to improve its strength while maintaining a high electrical conductivity has become a central task in the research and development of copper-based materials. Dispersed aluminum-copper composite materials better solve this problem. [0003] The properties of dispersed Al-Cu composites come from the addition of Al2O3. The size of alumina particles is only 3-12 nanometers, and the distance...

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Problems solved by technology

[0005] In order to solve the above-mentioned problems existing in the surface treatment of the existing dispersed aluminum-copper composite materials, the roughening solution is mixed with a strong oxidant and a strong acid, which solves the problem that the roughening solution remains in the dispersed aluminum after the traditional chromic acid treatment, and the copper biting reaction rate is uncontrollable. It can also oxidize and dissolve the impurities on the surface of the dispersed aluminum-copper composite material and adsorb various organic and inorganic substances, so that the surface of the dispersed aluminum-copper composite material can be cleaned, roughened and hydrophilic, and the plating efficiency and quality are improved. Pass the 850°C high temperature welding temperature assessment requirements