The stainless steel carriage screw is made of stainless […]
The stainless steel carriage screw is made of stainless steel. Although the stainless steel screw has good anti-rust and anti-corrosion ability, it can not guarantee that the stainless steel carriage screw will never rust. There are four main reasons for the stainless steel carriage screw rust. That is, the nature of the material itself, the environment in which it is used, the interface between the carriage screw and the environment, and the design of the improved metal structure. If corrosion-resistant alloys are used to make the carriage screws, such as the never-rusted titanium screws.
Unless the customer has special needs, it is not realistic in terms of cost, or the surface of the carriage screw is isolated from the environmental elements that will cause corrosion. In reality, it is not feasible, and it may be very difficult. Improved metal construction design can improve the impact of special conditions under certain conditions, but the design of most stainless steel carriage screws cannot be fully corrected, and maintenance is not permanent, so the problem cannot be solved fundamentally.
At present, the external part of the carriage screw is anti-corrosion, that is, the outer surface anti-corrosion treatment of the carriage screw is the most widely used method. The stainless steel carriage screw surface anti-corrosion treatment refers to the application of various protective layers on the metal surface. Is to isolate the metal from the corrosive environment to inhibit the corrosion process, or to reduce the contact between corrosive media and the metal surface to avoid or reduce corrosion. This method can also be called electroplating. The plating surface treatment should be able to meet the following requirements:
1. corrosion resistance, wear resistance, high hardness,
2. The structure is strict, intact, and the pores are small.
3. It is separated from the base metal and has good adhesion.
4. plating and a certain thickness.
The surface plating layer is generally divided into two types: a metal coating and a non-metal coating. The metal coating refers to a metal or alloy with high corrosion resistance to form a protective layer on the surface of the metal which is easily corroded. This coating is also called a plating layer. There are quite a number of methods and varieties for producing metal plating, the most common of which 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 to form a protective layer on the surface of metal equipment or parts. The protective layer can completely separate the stainless steel carriage screws from the environmental medium to avoid contact with the base metal. Corrosion is caused by corrosion in stainless steel standard parts.