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What concentration of Citric Acid for cleaning


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I'm about to use citric for the first time to clean the still. I have a bucket of concentrate at 50%, I'm curious what concentration everyone uses for a final pass in your still (copper/steel). 

HFD

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Low concentration to avoid pitting. Controlling temperature and flow/agitation is key to increasing rate and quality of etch. Higher concentrations will preferentially attack welds and defects, so don't do that.

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  • 6 months later...

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