On-line pretreatment device for copper-coated stainless steel wires

Abstract

The invention relates to a pretreatment device, in particular to an on-line pretreatment device for coating copper on the surfaces of stainless steel wires, and belongs to the technical field of electroplating. The pretreatment device comprises a pickling tank(1), a rinsing tank(2) and a sealed container(3), wherein the top of the rinsing tank(2) is enclosed and provided with an air inlet(5), theupper part of the rinsing tank(2) is provided with a plurality of spray headers(7), the lower part of the rinsing tank(2) is divided into a plurality of zones, the liquid level of the first zone is the lowest, and the liquid level of the last zone is the highest; the number of spray headers(7) are equal to that of ladder zones; the upper part of the first zone is provided with an overflow opening(9), while the bottom is provided with a water outlet(10); the upper part of the last zone is provided with a water inlet(8); the sealed container(3) is connected with an outlet of the rinsing tank(2); and the sealed container(3) is provided with an air outlet(6) formed above the electroplating liquid level. By the pretreatment device of the invention, a thick and stable copper-coated layer can beobtained, the bonding force between the coating and the basal body is effectively improved, and the water consumption of the rinsing tank is low.

Description

technical field [0001] The invention relates to a pretreatment device, in particular to an online pretreatment device for copper plating on the surface of stainless steel wire, which belongs to the technical field of electroplating. Background technique [0002] With the development of the economy, power wires in industries such as electronic computers, medical equipment, and automotive electrical appliances continue to develop in the direction of lightweight and thin wires. The current power wires are usually made of pure copper, but due to the lack of copper resources in my country and the price of copper The rising cost of power wires has caused the production cost of power wires to be too high. Manufacturers urgently need to find new metal materials to replace the original pure copper products. In recent years, a copper-coated stainless steel wire that can be used to replace the original pure copper products has appeared on the market, which has played a very good role in...

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Problems solved by technology

[0005] 1. The water consumption of the washing tank is large and the washing effect is not ideal. There is still residual acid attached to the surface of the stainless steel wire, which has a great impact on the pH value of the alkaline electroplating solution in the electroplating tank, and the coating is unstable and thin.

[0006] 2. The stainless steel wire obtains a fresh substrate after electrolytic pickling, and it will be oxidized again during the process of washing with compressed air, resulting in poor bonding between the final copper plating layer and the stainless steel substrate, and it is easy to fall off when subjected to external stress

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