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Letter 27862
Passivation vs. bead blast
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My company designs and builds equipment, mainly for the food
industry. We have the capabilities to glass-bead-blast our stainless
parts for a great finish that our customers our very happy with.
However, a customer has inquired into passivation, and if the
glass-bead-blast technique achieves the same result. I can see the
similarities, but do not have the background to know -- and explain
-- for sure.
Any help on this would be appreciated!
Pete Najar
design engineer - Dallas, Texas, USA
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If anything, I would think the blast would remove oxides and
activate the surface. Anyway, we passivate stainless with a solution
of 40-60% nitric acid. 30 min dip.
Mary Cera
- Oklahoma City, Oklahoma
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