The damage of alkalis to glass-lined steel
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I would like to ask everyone: is 15% sodium hydroxide harmful to glass-lined steel? The temperature is around 60 degrees!
Acid-resistant enamel is not resistant to hot concentrated alkalis and should not be used. At room temperature, alkaline solutions have a slow effect on it; sometimes it is used as an acid-base neutralization device. Adding zirconium compounds to enamel can appropriately improve its alkali resistance.
For alkalis, you can use stainless steel equipment, which is less expensive than enamel-lined ones; so why choose enamel-lined ones?
Typically, glass-lined equipment can resist alkaline solutions with a pH value of no more than 12; a 15% sodium hydroxide solution definitely exceeds this range.
A 15% sodium hydroxide solution can be stored in glass-lined tanks, but a temperature of 60 degrees is too high; it can be used at room temperature. CS carbon steel is also acceptable.
It will definitely **reduce the service life of glass-lined pipes; it’s best to avoid using them**