[Packaging Information] Excessive organic impurities and brighteners are the main causes of these problems: The brightness of the coating is affected by many factors. For example: the roughness of the base metal, the grain size and orientation of the coating, the properties of the complexing agent and additives, and the like. According to the “plane orientation theoryâ€, whether the plating is bright depends on the orientation of the crystal surface on the metal surface. Only when each crystal surface of the crystal is regularly taken in a direction parallel to the plane of the base, light can be totally reflected. Mirror bright plating.
Due to the inhomogeneity of the metal surface, the crystal surface with a larger deposition rate is also the position where brightener molecules preferentially adsorb, and the brightener has a resistance to metal electrodeposition. When there are too many organic impurities and brighteners in the plating bath, the deposition rate becomes slower, the hydrogen evolution rate increases, organic impurities are trapped in the plating layer, and the arrangement structure of the plating layer is affected, and the crystal surface structure becomes disordered and disordered. As the electroplating process progresses, the thickness of the plating layer increases, and the organic impurities contained in the plating layer also gradually increase, and the orientation of the crystal plane of the plating layer is affected, thereby causing the plating layer to darken. About 15 minutes after plating, the bright coating is because the coating is thin and the organic impurities are less in the coating. With the increase of plating time, the thickness of the coating increases, and the organic impurities in the coating gradually increase, which seriously affects the coating. The crystal plane aligns the structure, causing the coating to darken.
For more information, please pay attention to China's packing belt trading network: ã€ã€‘, welcome to free trial membership trial, contact information, QQ2923487824
China leading manufacturers and suppliers of Plastic Visor,Sun Visor Cap, and we are specialize in Pvc Visor Cap,Plastic Sun Visor Cap, etc.
All kind of plastic cap,pvc visor cap,transparent pvc hat,summer sun visor hat,women sun hat,man sport cap,golf cap,outdoor uv protective hat.
All material can be support.Logo are support for custom.
Factory direct price provide.
Plastic Visor,Sun Visor Cap,Pvc Visor Cap,Plastic Sun Visor Cap
Foshan Lixin Trading Co.,Ltd , https://www.chnlixin.com