The intergranular stress corrosion problem of 0Cr18Ni9 material in chlorosilane media
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A longitudinal crack appeared in the straight section of the head of a tank made of 0Cr18Ni9 material and used for storing chlorosilane; this phenomenon is likely due to intergranular stress corrosion caused by chloride ions. During the manufacturing process, chlorosilanes are subjected to dry distillation – what impact does this have on the tanks?
Why isn’t anyone helping me analyze it? The temperature of the chlorosilane medium was around -40 degrees, and cracks appeared after just three months; a 8mm thick plate became permeable.
This is a problem that occurs in polysilicon production. The area where cracks occur is mainly in the straight section of the head; this is a region where stress is relatively concentrated during the manufacturing process. Apart from changing the material, is there no other way to reduce the occurrence of corrosion?
Stainless steel stress corrosion cracking is mainly caused by chloride ions; the cause is likely the presence of chloride ions as well as the water contained in chlorosilanes