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What is the intergranular corrosion of stainless steel welded pipe?

by:HHGG     2021-04-16
What is the intergranular corrosion of stainless steel welded pipe? 2018-11-18   Under some special conditions, corrosion of stainless steel welded pipes may occur. Depending on the specific conditions, the causes of corrosion are also very different. So what is the intergranular corrosion of stainless steel welded pipes? To understand the intergranular corrosion of stainless steel welded pipe, the first thing to know is the grain boundary of stainless steel. The definition of stainless steel intergranular corrosion for stainless steel welded pipe is this. Intergranular corrosion refers to the selective local corrosion along the grain boundary when the dissolution rate of the grain boundary is much greater than the dissolution rate of the crystal grain itself in certain environments. This localized corrosion is called intergranular corrosion. Many factors will affect the intergranular corrosion, such as heating, stress, etc. The heating mostly refers to sensitization treatment, and the force is mostly cold working deformation. The heating of stainless steel will cause uneven changes in the grain boundary structure, which will affect the intergranular corrosion. The intergranular corrosion of stainless steel welded pipes is the same as other common corrosions. It is not a very difficult problem to solve, so the solution is also very common. It is to pay attention to protective measures during use, pay attention to the factors that can cause corrosion, and eliminate all possibilities. outer. At the same time, it is best to cherish a little bit during use and do not damage the protective layer on the surface of the stainless steel. Once the protective layer is damaged, the best stainless steel will quickly rust.  
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