1. pickling rust, rust pickling, the workpiece must be […]
1. pickling rust, rust pickling, the workpiece must be thoroughly degreasing, in order to ensure the quality of rust. Because if the oil is not clean, will affect the acid and oxide film contact and reaction caused by rust is not complete or inefficient, long time. With acid cleaning rust, matrix material loss is small, easy to control operation. After the surface of the rust is semi-bright state, without ash processing, and can be directly colored or anodized, but if you need plating or electroless plating, you need to go through zinc and other processes.
2. lye rust, the removal method is mainly alkaline chemical solution in the withdrawal. According to the type of materials and industrial aluminum surface of the workpiece may be, when the surface of the workpiece is very small oil, you can degrease and remove the film together. If the surface of the oil is very heavy, you should first degrease, and then remove the oxide film, otherwise it will cause degreasing, in addition to film are not complete, affecting the follow-up process, and may reduce the quality of surface treatment.