Corrosion resistance of stainless steel welded pipes in different environments

Stainless steel welded pipe corrosion

We know that stainless steel welded pipe has a strong corrosion resistance, then the corrosion resistance of stainless steel welded pipe by what factors? What is the difference between the corrosion resistance of stainless steel welded pipe in different environments?

Stainless steel welded pipe industrial pipe corrosion resistance with the increase in chromium content and progress, the underlying principle is that when there is enough chromium in the steel, the steel exterior constitutes a very thin dense oxide film, it can avoid further oxidation or corrosion. An oxidizing environment can strengthen this film, while a restorative environment is bound to destroy this film, resulting in corrosion of the steel.

Corrosion resistance in various environments

Atmospheric corrosion stainless steel welded pipe industrial pipe resistance to atmospheric corrosion is fundamentally with the content of chloride in the atmosphere. Thus, the proximity of land or chloride purification sources of stainless steel welded pipe corrosion is extremely important. Industrial environment in the industrial environment without chloride purification, can constitute a film of dirt on the exterior, but when the film is purged, but also adhere to the original bright appearance. In the industrial environment with chloride, stainless steel corrosion will be formed.

Austenitic stainless steel welded pipe industrial pipe such as 1Cr18Ni9 and 0Cr18Ni9, when exposed to the terrestrial environment, can show some corrosion. Rust is usually shallow and can be easily purged.TP316L molybdenum stainless steel welded pipe in the terrestrial environment is simply corrosion resistant. In addition to atmospheric conditions, there are two other elements that affect the atmospheric corrosion resistance function of stainless steel welded pipe, namely, the appearance of morphology and manufacturing process.