How to judge whether stainless steel pipe rust?
Stainless steel pipe is a kind of metal pipe with good corrosion resistance, which is usually used to transport liquid or gas. However, after a long period of use, whether the stainless steel tube will rust has become a concern.
1. Observe the appearance: the appearance is the first step to determine whether the stainless steel tube is rusty. Stainless steel tube under normal circumstances should be polished metal surface, no obvious rust. If found reddish-brown rusty spot appeared on the surface of the pipe, oxide layer or have obvious traces of corrosion, then it may be rusty phenomenon happened.
2. The use of magnetic test: stainless steel has the characteristics of magnetic, through the magnetic test can initially determine whether the pipe is stainless steel, and detect whether there are signs of rust. Generally, stainless steel pipes are non-magnetic at room temperature. If a magnet is used to adsorb on the surface of the pipe, it may indicate that there may be low-alloy stainless steel doped with other metal elements or rust.
3. Chemical detection: Chemical detection can more accurately determine whether the stainless steel tube rust. Can use chemical reagent of the pipe surface processing, observe whether any color change. Generally speaking, the surface of the stainless steel tube should maintain the original metal color, if there is a reddish-brown, black or other obvious discoloration phenomenon, it may be rust.
4. Corrosion test: Corrosion test can evaluate the corrosion resistance of stainless steel pipe in a specific environment. The stainless steel tube can be placed in a corrosive medium to observe whether the pipe is corroded or rustled. If there is obvious damage or rust on the surface of the pipe, it means that the corrosion resistance of the pipe may not be ideal.
Measures to prevent stainless steel pipe rust:
1. Regular cleaning: the dirt and impurities on the surface of the stainless steel tube will accelerate the occurrence of rust. Regularly clean the stainless steel tube, can remove the surface dirt and harmful substances, reduce the risk of rust. When cleaning, the appropriate cleaning agent should be selected, and the use of soft brush or cloth to clean, avoid the use of abrasive or steel ball and other tools that may scratch the surface of the pipe.
2. To prevent the damp environment: damp environment is one of the main reason for the stainless steel tube rusting. When installing and using stainless steel tubes, it is necessary to avoid prolonged exposure to the humid environment. Waterproof and moisture-proof measures can be taken, such as the use of moisture-proof agents, moisture-proof equipment, etc., to reduce the corrosion effect of moisture on pipes.
3. Pay attention to the use of the environment: different environments on the corrosion of stainless steel pipe is different. For example, salts and the humidity of the Marine environment with a strong effect on the corrosion of stainless steel. When choosing stainless steel pipe, the appropriate material and model should be selected according to the characteristics of the use environment to improve the corrosion resistance of the pipe.
Conclusion:
The rust of stainless steel pipe will have a negative impact on its service life and performance. Therefore, it is very important to judge and prevent the rust phenomenon of stainless steel pipe in time. By observing the appearance, magnetic test, chemical test and corrosion test methods can determine whether the pipe rust. In addition, regular cleaning, avoid damp environment and pay attention to the prevention measures such as using the environment also can effectively prolong the service life of the stainless steel pipe. Keeping stainless steel pipe in good condition ensures its normal operation and its excellent corrosion resistance.