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Ted Mooney, P.E. RET
Pine Beach, NJ
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Iron titration for acid pickle bath
What method would be usable to obtain an iron concentration via iron titration methodology?
What would an acceptable range for iron concentration in this bath be considering it's a 1000 gallon tank? what level would need to be time for a tank dump? I am new to system and previous employees did not keep any records so any help would be appreciated.. thanks
pretreatment and painting company - Berlin, Wisconsin
2006
2006
Sue -
A common titration for Fe+3 is a redox titration with sodium thiosulphate
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. You should be able to find details on the web or in a Chem textbook. It's important that Fe+3 be the only oxidizing agent in the bath however or you will get errors.
Consult your company internal specifications for guidelines on the concentration needed to maintain.
As far as tank life goes, you may have to run some experiments to determine that.
- Auburn, Washington
2006
And, Fe(+2) is commonly titrated with an oxidizer such as potassium dichromate or potassium permanganate
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What acid solution are you using, does it become yellow or green or ? To what pH do you titrate for acid, and does a rusty (red-brown) precipitate form? If so, the calculated acidity will be high, as some NaOH is consumed via Fe(OH)3 formation. An specific gravity data?
Please give info, and note some previous letters (from using the Search function):
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www.finishing.com/327/77.shtml Sulfuric acid titration indicator
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www.finishing.com/138/62.shtml IRON CONTENT IN HCl PICKLING
www.finishing.com/106/43.shtml How to analyze the acid level (HCL) in ferric chloride
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www.finishing.com/362/86.shtml ferric chloride
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- Goleta, California
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