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Stainless Steel Corrosion in Deionized Water

Stainless Steel Corrosion in Deionized Water

Stainless Steel Corrosion in Deionized Water

(OP)
Does anyone have information on stainless steel corrosion in deionized water?  I have been asked to specify a wleded stainless steel for use in a water filtration system that will have deionized water.

RE: Stainless Steel Corrosion in Deionized Water

Depends on the grade of DI water. Extremely pure DI ( High Mega ohm range) is very aggressive to most all alloys.

In the  10 megaohm/cm3 resistivity range (ambient temperature and pressure) I have used 304L without much problems.

RE: Stainless Steel Corrosion in Deionized Water

If it is 18 mohm DI water, try using plastic - either fiberglass or thermplastic lined fiberglass.  Semiconductor plants use lots and lots of 18 mohm DI water.  All their storage tanks (40,000 gallon) are fiberglass lined with PVDF (polyvinylidene flouride).

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