Friends who have been in the metal manufacturing industry must know about pickling. Pickling is to remove the oxide film on the metal material, and while removing the oxide film, a phosphate film should be formed on the surface of the metal. Don't underestimate this layer of film, it will play a certain role in the subsequent spraying or molding process. It has to be said that such pickling is like putting a new piece of clothing on the metal surface, and it is a new piece of clothing that must be worn. From this point of view, pickling is also a necessary step for us, and it must be done in place without being careless. Let's take a look at the process of making pickling of screws.

The first step is to control the concentration and temperature in the pool. Under this premise, pour the disk into the pool that we have prepared. This step is to remove the oxide film on the metal surface. The second step is to change the pool. The step here is called clear water. The main function is to remove the corrosive substances on the surface. The third step, oxalic acid, is to increase the activity of the metal and lay the foundation for the next ethical coating. The following is a more critical step for us. The phosphate should be in contact with the surface of the metal material to form a coating.

The following is a step-by-step clean water to remove the remaining things. Such steps may seem simple, but we have to have a good grasp of the time during operation. This kind of mastery requires the operator to have a good grasp of the time. Otherwise, pickling is a transition and has no practical significance. The steps are just not possible to implement. It can be said that pickling is a transitional period for screw production. Such a step must be well realized in order to do our following process well and meet certain quality requirements.

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