Letter 42011

Return of conductivity after rinsing  

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We rinse several 304 ss components in 416 litres of deionized water, until we reach 10 micro seimens. Then the vessel is sealed for 24 hours. When we open the vessel the conductivity has rebounded to 50 to 60 micro seimens. We experience this rebound no matter how many times we complete the rinse. Where are we getting this bounce?

Brad MacSwain
World Source Filtration Inc. - Sarnia, ON, Canada

If I am correctly understanding what you are doing, I believe the 304 stainless is dissolving in the DI water sufficiently to raise the conductivity to the level you are observing.

Ted Mooney, P.E.  finishing.com Brick, New Jersey

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