Stainless steel screws are made of metal, and metal corrosion methods are mainly four ways, namely, the nature of the material, the use of the environment, data and environment interface and improve the design of the metal structure, if the use of a complete corrosion-resistant alloy to manufacture stainless steel screws Unless there is a special demand, it is impractical in economic terms or the complete separation of the screw's appearance from the corrosive elements of the environment that are corruptible may not be feasible in practice and may be very difficult. Improve the metal structure design can be in a situation to improve the special circumstances of the impact, but most stainless steel screw design can not be fully corrected, and its maintenance is not permanent, so this method can not basically solve the problem, as long as the interface Anti-corrosion, that is, the appearance of anti-corrosion treatment is the most widely used method.
Stainless steel screw anti-corrosion surface treatment refers to the use of various methods in the metal surface to maintain the layer, its role is to isolate the metal and corrosive environments, to inhibit the corrosion process, or reduce the corrosive medium and metal appearance, and reach Avoid or mitigate the purpose of corrosion.
　　The maintenance layer should be able to fit the following request:
　　1, corrosion-resistant, wear-resistant, high hardness,
　　2, well-structured, intact, small pores.
　　3, separated from the base metal strong, good adhesion.
　　4, the average distribution and a certain thickness.
　　Maintenance layer is usually divided into two types of metal coatings and non-metallic coatings, metal coating refers to the use of corrosion-resistant metal or alloy in corrosion-prone metal surface to form a maintenance layer, this coating is also called coating. There are quite a few ways and varieties of metal plating. The most common ones are electroplating, followed by molten metal immersion (hot dip) and chemical appearance. Non-metallic coating refers to the use of organic polymer materials such as paint, and inorganic materials such as ceramics, metal equipment or components in the appearance of the formation of the maintenance layer, the maintenance of the substrate layer can be completely separated from the media and the environment to avoid matrix metal corrosion due to contact Corrosion is formed on stainless steel standard parts.
Moisture-proof measures
　　Iron screws if it is wet, or was dipped in liquid. In or have been damp, etc., in this case, are likely to rust. Therefore, in order to prevent rusting screws, we have moisture-proof screws. So how to deal with the moisture moisture-proof screws! Moisture-proof moisture-proof method is as follows:
　　(1), vibration machinery try to use solvent-free paint.
　　(2), it is best to use non-oxidizing ingredients impregnating varnish, such as epoxy urethane (Epoxy-urethane) -based epoxy or unmodified epoxy (Epoxy-) -based varnish.
　　(3), the use of melamine acid varnish should be adjusted curing temperature and curing time, the curing temperature is slightly higher than 130 ℃ (such as 135 ℃) and curing time is greater than 180min is appropriate, and the process must be strictly enforced, especially In hot and humid season, the vibration sieve vibration because of the concept of rust from the paint factory paint samples specified in the paint drying (curing) time is not necessarily sufficient, the motor has a specific inner shape.
　　(4), the use of volatile acid paint.
　　(5), choose a good resistance to hydrolysis paint.