Stainless steel screws are a type of steel screw that can resist corrosion from gases, water, acids, alkali salts, and other substances. They are widely used in industries such as environmental protection machinery, medical equipment, and communication devices. However, when purchasing stainless steel screws, customers generally only focus on the specifications and models of the screws (such as 2, I3), and rarely mention the pitch of the screws. This article discusses the necessity of the pitch of stainless steel screws and the effectiveness of the pickling process.
The pitch of stainless steel screws is crucial for installation. If the pitch of the screw is not consistent with the pitch of the inner hole or bolt to be installed, installation cannot be carried out, and only screws, nuts or spare parts need to be replaced. When purchasing screws from screw manufacturers, some customers do not specify the tooth pitch of specific screws, and the manufacturer generally defaults to the tooth pitch of coarse teeth.
Therefore, if the pitch of stainless steel screws is special and does not match the coarse pitch, users should confirm the required pitch with the screw manufacturer before purchasing. Otherwise, it may not be properly assembled during use. Friends working in the field of metal products should be familiar with acid pickling. Acid washing is a process of removing the oxide layer on the surface of metal materials. In addition, a layer of polyphosphate plastic film is formed on the premise of removing the oxide layer, which plays a certain role in the later stage of electrostatic spraying and shaping.
Firstly, grasp the concentration and temperature of acid washing in the pool. Then place the screws waiting to be processed into a pre prepared pickling tank to remove the oxide layer on the surface of the metal material. Next, transfer the screws to the sewage well to eliminate the corrosive components on the surface. Then hydrochloric acid is used to enhance the metal activity and fully prepare for the next step of polyphosphate coating. The final step is the key step, which is to contact the surface of the metal material and produce a coating of polyphosphate salt to solve the problem. Acid washing is a key factor in the manufacturing of screws. Only by properly executing the entire acid washing process can the subsequent processing techniques be successfully carried out and meet certain quality standards.