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Ted Mooney, P.E. RET
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for Metal Finishing 1989-2025
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Corrosion resistance of anodized aluminum to deionzed water
Deionized water is hungry for ions. Are anodized aluminum vessels suitable for storing DI water?
Kyle ValdockFuelMaker - Toronto, Ontario, Canada
2006
DI water can vary from 50 Kohm to 18 meg ohm. Teflon is the best answer for 18 Meg ohm water. Glass is suitable for 1-2 meg ohm water. Selected polyethylene and polypropylene is suitable for a good range in between. Aluminum is not a great idea for any level, but could get by for short applications where leaching was not important.
James Watts- Navarre, Florida
2006
If you just want to use tanks that you have on hand (I made a leap... fuel tanks?) You'll have to coat the inside with a good waterproof epoxy, urethane, or teflon. If you can do that the aluminum will be acceptable. Don't expect long life from aluminum tanks, DI water will make them brittle in a few weeks and they will eventually fail, probably in an impressive way (big hole all at once!)
Jeff Watson
- Pearland, Texas
2006
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