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Identifying L605 surfaces that are contaminated with 17-4

March 2, 2010

I have a product that is manufactured using L605 (Haynes 25). We have 17-4 contamination in the form of agglomerations roughly .060" diameter. Our customer is only concerned about 17-4 on the surface, internal contamination is of little concern.

I'm looking for suggestions on a method to identify any surface connected contamination. My thoughts right now are along the lines of a corrosion test that would highlight the 17-4 but not affect the L605.

Any thoughts?

Peter Marshall
Engineer - Longmont, Colorado, USA

SEM with EDS or a micro spot XRF with mapping capability.

Terry Tomt
- Auburn, Washington
March 4, 2010

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