The surface treatment process of Nickel Plated Parts is a complex and delicate process. The main purpose is to ensure excellent bonding between the plating layer and the base material, while improving the corrosion resistance and wear resistance of the parts. The following are the main steps of the Nickel Plated Parts surface treatment process:
Preparing the workpiece: Before starting processing, the workpiece needs to be thoroughly cleaned to remove oil, dust and other impurities from the surface. This step is crucial for subsequent processing because it directly affects the quality and adhesion of the coating.
Mechanical oil and rust removal: For oil stains and rust on the surface of workpieces, mechanical methods are usually used for preliminary treatment. This includes methods such as wiping with a dry cloth, sanding with water, or mechanical polishing to remove oil and rust from the surface.
Chemical degreasing: After mechanical degreasing and rust removal, chemical degreasing is also required. This step usually uses alkaline cleaning agents or organic solvents to further remove oil stains and residues from the surface of the workpiece. The conditions for chemical degreasing include appropriate temperature and time to ensure the degreasing effect.
Pickling: Pickling is a key step in removing oxide scale and impurities from the surface of the workpiece. Pickling solutions usually use strong acid solutions such as hydrochloric acid or sulfuric acid to remove the oxide layer and impurities on the surface through chemical reactions. After pickling, the surface of the workpiece should be free of rust, scale and other impurities.
Activation: Activation is to obtain better catalytic performance on the surface of the workpiece to promote the nickel plating reaction. Activation treatment usually uses a weak acid solution or activator to make the surface of the workpiece more active and easier for the coating to adhere.
Nickel plating: After the above pretreatment steps, the workpiece is placed into a nickel plating tank for nickel plating operation. During the nickel plating process, parameters such as temperature, pH value, concentration and current density of the plating solution need to be controlled to ensure uniform thickness and good brightness of the coating.
Post-processing: After nickel plating is completed, post-processing processes are required, such as drying, annealing, etc. These steps improve the crystallinity and corrosion resistance of the coating while removing residues and impurities from the surface.
Surface treatment: The last step is to carry out surface treatment as needed, such as grinding, polishing, painting, etc. These treatments can improve the appearance quality and gloss of the parts, making them more beautiful and durable.
To sum up, the surface treatment process of Nickel Plated Parts is a complex and delicate process that requires strict control of the parameters and conditions of each step to ensure the quality and performance of the plating.
