The purpose of pre-plating pretreatment is to obtain a clean and fresh metal surface and prepare for the final high-quality coating. Mainly for degreasing, to rust, to dust and other work. Proceed as follows:

The first step is to make the surface roughness meet a certain requirement, which can be achieved by surface grinding, polishing and other processes.

The second step is to remove grease, which can be realized by solvent dissolution, chemical, electrochemical and other methods.

The third step is derusting, which can be derusted by mechanical, pickling and electrochemical methods.

The fourth step is activation treatment. Generally, it is etched in weak acid for a certain period of time for pre-plating activation treatment.