Surface Treatment Of Stainless Steel Screws And Characteristics Of Self Tapping Screws

1. Electroplating: Soak the parts in an aqueous solution containing metal compounds, and deposit metal on the surface of the parts by current. Common electroplating methods include zinc plating, copper plating, nickel plating, chromium plating, copper nickel alloy plating, etc.
2. Hot dip galvanizing: Immerse carbon steel components in a molten zinc solution at a temperature of approximately 510 ℃, forming a passivation layer on their surface that transforms from iron zinc alloy to zinc. A similar process is hot-dip aluminum plating.
3. Mechanical plating: A coating is formed on the surface of the product by spraying metal particles, and the coating is fixed on the surface of the product by cold welding. Electroplating is usually used for screws, but for hexagonal wood screws used outdoors, hot-dip galvanizing is usually used. The cost of electroplating is generally 0.6-0.8 yuan per kilogram, while the cost of hot-dip galvanizing is generally 1.5-2 yuan per kilogram, which is relatively high.
Many people who are interested in screws may have some understanding of self tapping screws. However, we cannot be arrogant or complacent because of this. Everyone's understanding of screws may vary. If we can share information about self tapping screws, screw manufacturers can gain more innovative ideas, manufacture higher quality products, benefit everyone, and make our lives more diverse.
Therefore, many screw manufacturers will systematically summarize the screw market. We will find that self tapping screws can actually be divided into several types, including thread forming, thread cutting, thread rolling, and self drilling.
Firstly, let's talk about thread forming self tapping screws. This type of screw has evolved from the development of metal sheets. When using, we need to drill a hole in advance and then screw the screw into the hole to form a fit of internal and external threads. This is the working principle of thread forming self tapping screws.