Metal Surface Treatment Using Oxygenated Water
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Jul 15, 2024
filing date -
Jul 15, 2024
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Abstract
A passivating system for stainless steel process equipment includes: an oxygenation system comprising a raw water inlet, an oxygen inlet, a porous membrane through which oxygen flows into the raw water to create oxygenated water and, an oxygenated water outlet; a fluid conduit providing the oxygenated water to a clean-in-place (CIP) system connected to the stainless steel process equipment; and, a control interface through which a user may circulate the oxygenated water through the piping for a selected time to improve the surface passivation after a cleaning cycle. The oxygenation system may be separate from the CIP system or they may be co-located on a skid or other common base. The oxygenated water preferably has a dissolved oxygen content of at least 20 mg/L.
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