Corrosion of temperature sleeves
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Is there anyone who can explain how these two temperature sleeves ended up looking like this?
It’s normal; it’s due to fluid erosion, with the medium being dusty or consisting of solid particles in a fluidized state.
It’s a bit like erosion by scouring. What are your operating conditions? Casing material?
What medium are you testing here? Erosion can cause this
The medium contains a large amount of solid particles, which are formed under high pressure and high flow rates; as a result, its surface features many uneven areas of varying particle sizes. This medium causes intergranular corrosion in the casing material. Therefore, it can be preliminarily inferred that the by-products present in this medium may be corrosive. Considering overall cost-effectiveness, it is best to use casing made of 321 material
The black color appears to be due to high-temperature carbonization. Some chemical components of the material of the other casing have oxidized and changed color, while others continue to resist corrosive fluids.
Erosion – it’s back to normal; those that were worn out over time have been repaired