Knowledge of activation treatment before electroplating of color stainless steel expansion tube

The special pre-treatment is activation treatment. Through this treatment, the surface of the colored stainless steel plate can be improved to a surface suitable for electroplating. Activation treatment can be roughly divided into: dipping treatment; cathode treatment; activation-plating simultaneous treatment. These activation treatments have their own advantages and disadvantages, and can be appropriately selected and used according to the requirements of materials, use environment, and binding force.

The electroplating process on the color stainless steel plate is basically the same as that on the ordinary metal substrate, but the color stainless steel plate needs to be "activated". However, the activation treatment does not necessarily use only one method. There are methods that use a combination of immersion treatment and cathode treatment, or simultaneous treatment of immersion treatment and activation-electroplating. Some can omit the primer coating. The degreasing process is an important processing step to remove grease and other attachments on the surface of the colored stainless steel plate to clean the surface. Anodizing is usually used. There is a close relationship between the degreasing treatment and the adhesion of the coating. That is to say, in order to improve the binding force, it is necessary to study not only the activation treatment, but also the degreasing process, so that even if there are unexpected problems, it can be solved quickly.

In the degreasing treatment solution for colored stainless steel plates, is it better to add potassium hydroxide to the immersion treatment method or to adopt the anode treatment method? Even if this treatment method is carried out separately from the oil removal treatment, the same good results can be obtained. However, anode treatment is better than immersion treatment. Potassium cyanide is better than potassium hydroxide. This is because stains are removed from the surface of the colored stainless steel plate and the passivation is more or less destroyed.