Stainless steel nuts are made of metal, and there are four main methods for metal corrosion protection, namely the nature of the material itself, the environment in which it is used, the interface between the material and the environment, and the plan to improve the metal structure. If an alloy with no lack of corrosion resistance is used to make stainless steel nuts Unless there are special needs, it is impractical in terms of economic concept, or the appearance of the nut is completely isolated from the environmental elements that will cause corrosion. It may not be feasible in practice, and it may be very difficult. Improved metal structure planning can improve the impact of special circumstances under certain conditions, but most of the stainless steel nut planning cannot be fully modified, and its protective effect, so this method can not basically deal with the problem, as long as the interface is anti-corrosion, that is, the appearance Anti-corrosion treatment is now a widely used method. Next, Metric Thread Fittings Manufacturers introduce the corrosion prevention methods of hexagonal joints.

The anti-corrosion treatment of stainless steel nut surface refers to the use of various methods to apply a protective layer on the surface of the metal. Its function is to isolate the metal from the corrosive environment to prevent the onset of corrosion or to reduce the contact between corrosive media and the surface of the metal. The intention is to avoid or mitigate corrosion. The protection layer should be able to meet the following requirements:

1. Corrosion resistance, wear resistance, high hardness,

2. The structure is tight, flawless, and small in pores.

3. It is strong and has good adhesion to the base metal.

4. Evenly distributed and thick.

The protective layer is generally divided into two types: metal coating and non-metal coating. Metal coating refers to the use of metal or alloy with relatively high corrosion resistance to form a protective layer on the surface of the easily corroded metal. This kind of coating is also called plating. . There are many methods and varieties of metal coatings, among which the most common is electroplating, followed by molten metal immersion plating (hot-dip plating and chemical surface treatment. Non-metallic coating refers to the use of organic polymer materials such as paint, and inorganic materials Such as ceramics, a protective layer is formed on the surface of metal equipment or parts. The protective layer can insulate the base metal from the environmental medium and prevent the base metal from corroding due to contact with the standard stainless steel medium.