The pickling process in the production of precision screws is a very important step. The purpose of acid washing is to remove the oxide film on the surface of metal materials and form a layer of phosphate film on the metal surface while removing the oxide film. This layer of film plays an important role in the subsequent spraying or molding process.
It can be said that pickling is like putting a brand new piece of clothing on a metal surface, which is an essential step that must be done properly and not taken lightly.
Attention should be paid to the following matters during the pickling process:
Control the concentration and temperature in the pool: When preparing the pickling solution, it is necessary to ensure that the concentration and temperature of the pickling solution in the pool are within an appropriate range to effectively remove the oxide film and form a thin film.
Pool operation: First, place the screws to be processed into a pre prepared acid solution to remove the oxide film on the metal surface. Then perform water washing by placing the screws in clean water to remove any corrosive substances from the surface. Next, oxalic acid treatment is used to increase the activity of the metal and lay the foundation for the next step of coating.
Phosphate coating: This is a crucial step to ensure that the phosphate contacts the surface of the metal material to form a coating. Then rinse with clean water to remove any residue. Although this step may seem simple, strict control over time is required during operation. Operators must be proficient in time management, otherwise acid washing will only be a formal step, lose practical significance, and cannot proceed smoothly with subsequent processes.
In addition, when using stainless steel screws in daily life, the following precautions should be taken:
Storage protection: During storage, the protection of the product should be strengthened to ensure a dry environment. Electroplated iron screws should not be placed in damp places. Be careful during the packaging process to avoid violent packaging. If non-standard parts with special requirements are involved, they need to be wrapped in mesh bags or other objects, taking care to avoid collisions with each other.
Handle with care: During transportation, handle with care to prevent damage to the product. Place according to the instructions on the packaging box, and arrange warehouse staff for unified learning to guide operators on the correct transportation process and precautions of fasteners, in order to prevent the teeth of screws from being damaged and unable to be used in conjunction with nuts.
By following these precautions, it is possible to ensure the smooth acid washing process in precision screw production and maintain the good performance and appearance of stainless steel screws when used.
