Characteristics and causes of rust of 316L stainless steel pipe

316L stainless steel pipe is a hollow long circular steel material. It is mainly widely used in industrial transportation pipelines and mechanical structural components such as petroleum, chemical industry, medical treatment, food, light industry, mechanical instrumentation, etc. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in manufacturing mechanical parts and engineering structures. It is also commonly used to produce various conventional weapons, gun barrels, artillery shells, etc.


Characteristics of 316L stainless steel:

1. 316L stainless steel pipe also has good resistance to chloride corrosion, so it is usually used in marine environments.

2. Corrosion resistance: The corrosion resistance is better than that of 304 stainless steel pipes, and it has good corrosion resistance in the pulp and paper production process.

3. 316 stainless steel is also resistant to corrosion from the ocean and corrosive industrial atmosphere. Heat resistance: 316 stainless steel pipe has good oxidation resistance in intermittent use below 1600 degrees and continuous use below 1700 degrees.


If the surface of the stainless steel pipe is rusted, the reasons are as follows:

1. The poor quality of steel strips is caused by surface coating factors. At present, the steel belts used in stainless steel plants mainly include steel belts for refining furnaces, steel belts for high-frequency furnaces and steel belts for medium-frequency furnaces. Generally speaking, the possibility of rusting stainless steel pipes caused by steel strips in steelmaking furnaces is very small.

2. The annealing temperature of the steel strip is not enough;

3. Environmental factors. Stainless steel pipes are very sensitive to acid and alkali substances and are prone to rust.