What causes corrosion of stainless steel welded pipes?

With the popularization of stainless steel welded pipe applications, the performance of stainless steel welded pipes has attracted more and more attention. Corrosion occurs when stainless steel welded pipes are used for a long time. What causes corrosion of stainless steel welded pipes?

　　There are two main reasons for the corrosion of stainless steel welded pipes: 70% of them are processed and processed. Due to the pollution of iron and copper tools during processing, the argon gas in the welding is not well protected and oxidation occurs. In addition, excessive damage to the surface of the stainless steel factory anti-oxidation layer during processing may cause contamination of stainless steel and lead to rust; in part, the equipment type does not take into account the process needs, such as sulfuric acid in the wine industry, sulfur dioxide sealing Among them, sulfur is more corrosive to stainless steel, and 316L anti-corrosion stainless steel plate is used in the industry for the top or upper tube section.


　　There are three solutions to this situation:


　　First, protect the surface of the stainless steel plate from being affected during processing, and do anti-corrosion treatment at the bottom. For the processing party, the welding material is higher than the base material;


　　Second, adequate protection of argon;


　　The third is film protection. When processing, stainless steel welded pipe tools, wooden hammers, rubber, carpets, wood boards and other tools are used to contact the surface of the stainless steel plate to avoid contact with iron and copper tools.