Storage with 20% NaOH
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I’m currently dealing with a 20% NaOH storage tank; the tank is made of carbon steel, and its interior has been coated with glass flake material for corrosion protection. However, some people argue that such corrosion protection is not necessary, claiming that NaOH can corrode glass flakes, glass cloth, as well as rubber gaskets and plastics. I would appreciate it if experts could provide a definitive explanation on this matter
There should be no corrosion; I’ve seen a 20% alkali storage tank at a factory’s chemical water treatment station that was made entirely of plastic, and it’s still in use after 3 years. No corrosion was seen.
Carbon steel is sufficient! Why anti-corrosion? If anti-corrosion is required, then appropriate anti-corrosion measures should be chosen. Our liquid alkali storage tanks and dilute alkali storage tanks do not have anti-corrosion treatment, but the cofferdam has been treated for anti-corrosion!
You need to ask the corrosion prevention engineer in charge of the design