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Inspection post passivation for closed / non visible systems

March 2, 2009

In ASTM A380 , several methods are suggested for inspection of cleanliness post passivation: Visual inspection; wipe tests; residual pattern; water-break test; free iron test such as water-wetting or drying; high-humidity test; and copper sulphate ⇦ on eBay or Amazon [affil link] test. Precision inspection shall be performed by solvent-ring test, black light inspection, atomizer test, and ferroxyl test.

How can a closed system be inspected for proper cleanliness and passivation where most areas are not accessible to the eye or a boroscope without breaking the system open?

Thanks,

Arnaud Serfass
Director, Life Sciences - Singapore

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