Frequently asked questions about high-strength nuts

The high-strength nut has the advantages of simple connection structure, good physical performance during use, detachable assembly, resistance to fatigue, and no loosening under load. It is a very hot commodity. There are actually three types of high-strength nuts: friction type and working pressure type. It is not necessary to think that high-strength nuts are made of different processing techniques. Therefore, its installation performance is excellent, and it is not easy to carry out anti-corrosion and anti-rust treatment. In fact, they must have anti-corrosion and anti-rust treatment protection. We need to keep an eye on it to enhance the lifespan of these people. Now let's talk about the factors that anti-corrosion and anti-rust treatment will damage him. 1. In air pollution (such as an atmosphere with a lot of sulfate, carbon dioxide and nitrogen monoxide), hydrochloric acid, sodium cyanide and acetic acid are produced in condensed water, which will cause chemical corrosion. 2. The surface of the stainless steel bolt is stained with organic chemical juice (such as cantaloupe, vegetables and fruits, noodle soup, phlegm, etc.). Under the premise of water and oxygen, organic matter is produced, and the long-term organic matter erodes the surface of metal materials. 3. Adhere to dust or heterogeneous metal particles, and combine them into a micro-rechargeable battery in the condensed water of wet and cold gas, appendages and stainless steel screws, causing electrochemical corrosion and destroying the protective film. This is called an electrochemical reaction. 4. The appendages on the surface of the stainless steel plate contain acid, alkali and salt (such as edible alkali and lime slurry splashed on the decorative wall), which will cause partial corrosion. In addition to anti-corrosion and anti-rust treatment, the level of friction coefficient has a great impact on the bearing capacity of high-strength nut connection. According to tests and other methods, it has been confirmed that the key friction coefficient is affected by the shape of the contact plane and the reason why the prefabricated component is made of raw materials. In order to improve the friction coefficient of the contact surface, sandblasting and steel brush cleaning are usually used to clean the contact surface of the components in the joint area.