304 stainless steel liquid level gauge is in a strange state of corrosion and perforation
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Everyone: Our waste water tank (acid and alkali wastewater from each workshop) uses a 304 magnetic flap liquid level gauge. It has been corroded and perforated after less than a year of use. After I opened the liquid level gauge, I found that the corrosion was not the overall corrosion or pitting corrosion and perforation as I imagined. Instead, it was like a deep trench running vertically from the top of the liquid level gauge to the bottom (3.25m). Note that there are 3 trenches (non-uniform distribution). Could you please analyze why there is regular corrosion in the gullies?
If you use welded pipes, buy seamless pipes.
Use a PTFE-lined magnetic flap level gauge or a radar-based
This is a seamed steel pipe... so corrosion occurs at the welds!
There are about three asymmetric corrosion grooves in a pipe.
There are at least 3 grooves in total, this one is the most obvious
There are two points of corrosion. Stress and welding seam processing are the most susceptible to corrosion.