Citric acid passivation

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Jtvann

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I've read all about the concentrations and temps for various acids for passivation.

I'd like to use citric acid. Is it necessary to completely submerge for passivation, or will a constant CIP spray work.

It's easier to mix up 2 gallons and spray my 14g unitank than it is to fill 14 gallons.

Any thoughts?
 

Vale71

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Contact times that you'll find in pulished standards are for full submersion ensuring costant and uniform contact. Using a spray ball would add an extra layer of uncertainty.
 
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Jtvann

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Was trying to avoid having to use 5 lbs of the stuff for one fermenter. Like you said, I could try it. Results may not be as good, but it surely won't hurt anything and will be better than nothing.
 

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