Anti-corrosion method for inner hexagon screws

Stainless steel screws are made of metal, and there are four main ways to prevent metal corrosion, namely, material properties, use environment, interface between materials and the environment, and improved metal structure design. If a completely corrosion-resistant alloy is used to manufacture stainless steel screws, Unless there is a special need, it is economically impractical, or to completely isolate the screw's appearance from the environment that will cause corrosion, but it is still not feasible in operation. Improving the metal structure design can improve the influence of special circumstances under certain circumstances, but the design of most stainless steel screws cannot fully guarantee its protective effect, so anti-corrosion treatment on the surface is currently the most widely used method.
Anti-corrosion treatment on the surface of stainless steel screws refers to the use of various methods to apply a protective layer on the metal surface. to avoid or mitigate corrosion.
The protective layer of hexagon socket head screws shall meet the following requirements:
1. Corrosion resistance, wear resistance, high hardness.
2. The structure is tight, intact, and the pores are small.
3. Separation from the base metal is strong and the adhesion is good.
4. Spread evenly and have a certain thickness.