Difference between cold degreasing and hot degreasing of plating
Author: Robby
The main differences between cold and hot degreasing of electroplating are the operating temperature, method, principle and application. Operating Temperature: Cold degreasing is carried out at room temperature, while hot degreasing requires heating the billet to make the binder component volatilize or decompose, so hot degreasing requires a higher temperature.
Methods: Cold degreasing mainly involves placing the workpiece into a solution composed of zinc salts by means of electrolytic equipment, utilizing the positive and negative electrodes of the electrolytic equipment to connect the power supply, and depositing a layer of zinc on the workpiece through the directional movement of the electric current. Hot degreasing is a method of removing the binder component from the blank by heating the blank so that the binder component volatilizes or decomposes.
Principle: Cold degreasing utilizes electrochemical principles to form a metallic covering on the surface of the workpiece through an electrolytic reaction. Hot degreasing uses heat to break down the binder to remove it from the blank.
APPLICATIONS: Cold degreasing is suitable for a variety of conductive materials such as steel, copper and aluminum, as it is an electrochemical process. Hot degreasing, on the other hand, is mainly used in the field of materials science and technology, especially in powder molding and sintering technology, where the binder component is removed from the billet by heating the billet so that it volatilizes or decomposes.
Overall, there are significant differences between cold and hot degreasing in terms of operating temperatures, methods, principles and applications, and the choice of which method to use depends on the specific application requirements and process conditions.