Constant-temperature electroplating rinsing bath and constant-temperature aluminum alloy electroplating technology

Abstract

The invention discloses a constant-temperature electroplating rinsing bath and a constant-temperature aluminum alloy electroplating technology. The constant-temperature electroplating rinsing bath comprises a rinsing bath body; at least two side surrounding walls of the rinsing bath body are provided with heat exchange chambers for accommodating constant-temperature equipment; a motor chamber for accommodating a compression motor which provides power for the constant-temperature equipment is formed in one side surrounding wall of the other two sides of the rinsing bath body; and the heat exchange chambers and the motor chamber are covered with access doors capable of being opened. The rinsing temperature is controlled at a low temperature, so that even in high-temperature summer, when the workshop temperature reaches about 30 DEG C, the surface of a zinc layer deposited with zinc is not rapidly oxidized, the problem of oxidation of the zinc layer deposited with zinc is solved, enough activity is kept for subsequent chemical nickel plating, and the problem of poor binding force between an aluminum base material and a surface plating layer is effectively solved.

Description

Technical field[0001]The present invention relates to a constant temperature plating water washing tank and a constant temperature aluminum alloy electroplating process.Background technique[0002]It is necessary to improve the binding force of the surface plating layer of aluminum and aluminum alloy parts, and obtain a good coating, the key is special plating treatment. The aluminum material itself is active, and the affinity is very affinity with oxygen, it is easy to form an oxide layer in the air, and aluminum is unstable in the acid, alkaline solution, so that the reaction may occur is more complex, and the electroplating increases. Difficulty.[0003]To this end, the prior art is widely used in two sinking of the aluminum, and the oxide film of aluminum surface is removed in the Shenzhan liquid and deposited on the upper zinc layer to prevent aluminum matrix from oxidizing, so that the metal aluminum aluminum aluminum is produced well in the subsequent coating. Binding force.[0004...

AI Technical Summary

Problems solved by technology

[0004] Although the existing two-time zinc-immersion process can improve the bonding force between the aluminum substrate and the subsequent coating, there are still problems of poor bonding force for products that require high-temperature baking or welding, which cannot be effectively solved

[0005] Because the activity of zinc metal is close to that of aluminum, it is also more prone to oxidation reaction, especially in high temperature environment, it is more likely to oxidize and make the zinc layer on the surface of aluminum loose, resulting in subsequent electroplating. Bubbles, peeling and other poor bonding force, especially when the electroplating parts are welded and assembled on the line, the product is defective and scrapped, and the quality cost is huge

[0006] The above problems occur less in winter, and the ambient temperature of the electroplating workshop in summer is high, and the problems occur frequently

It is extremely difficult to reduce the oxidation of the surface of the zinc layer by changing the ambient temperature of the workshop. The electroplating workshop must be ventilated, and the existing refrigeration equipment such as air conditioners need to be refrigerated in a closed environment, which is difficult to achieve the cooling effect in theory.

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