Presumably friends who have spent time in the metal manufacturing industry must have understood the pickling process. The pickling is to remove the oxide film on the metal material and to form a layer of phosphate on the metal surface while removing the oxide film. Film, do not underestimate this layer of film, play a certain role in the future of the spray or molding process. It has to be said that such pickling is like putting a new dress on the metal surface and it is a new dress that must be worn. From this point of view, pickling is also an essential step for us, and we must be in place. We must not be sloppy. Here we come to understand the special screw making pickling process.
The first is the mastery of the concentration and temperature in the pool. Under this premise, the disc is poured into our already prepared pool. The first step is to remove the oxide film on the metal surface. The second part is to change the pool. The steps here are called clear water. The main function is to remove the surface corrosive substances. The third oxalic acid is to increase the activity of the metal and lay the foundation for the next moral film. The following is our most critical step. Phosphate should be in contact with the surface of the metal material to form a film. The following is a step of clear water to remove the remaining things. This step may seem simple, but in the operation, we must grasp the time well. This kind of mastery requires the operator to have a good grasp of time, otherwise the pickling is a cut-off, without practical significance, then later The procedure is also impossible to implement. It can be said that pickling is a transitional period for the production of special screws. This step must be well implemented in order to be able to do a good job of our process below in order to achieve certain quality requirements.