Unlike rivets and expansion, bolts and nuts usually require repeated disassembly and replacement. This type of fastener that relies on threads can easily lock and cannot be removed as long as it rusts, greatly affecting the use and lifespan of the equipment. In terms of screw corrosion prevention, we have identified various measures through continuous analysis and testing, which facilitates selection based on different usage environments and purposes. Commonly, such as changing the internal structure of metals, stainless steel screws such as 304 and 316 are used to improve corrosion resistance. Stainless steel bolts and nuts can be used for a long time as they do not collide or damage the surface of threads, even in humid environments, and are very popular.
Another option is to use different surface treatment techniques, such as metal plating and Dacromet, which are crucial for carbon steel bolts and nuts. The anti-corrosion ability of using these processes varies from high to low, and some are affordable, but the quality may be relatively poor. Some screw coatings can also be selected in different colors such as blue, color, and black, which are not only practical but also have a beautiful appearance, and have excellent anti embroidery ability. This is a galvanized method, and products such as countersunk hexagonal heads are widely used; And Dacromet, the color is monotonous and the price is cheap. In short, each measure has its own advantages and disadvantages. When using it, it is sufficient to ask the bolt factory which technology has been adopted by the household, and then choose according to the purpose.
Post time: Jul-12-2023