Case 958 ยท Public preview
Particle Chemistry and Morphology Can Test a Suspected Contamination Source
Metallic debris on air filters raised concern that a zinc-plating problem had increased the internal particle burden.
SEMEDSImage analysisParticle metrologyFilter comparisonControl comparison
What the evidence preview establishes
Zinc was present, but the plating issue did not significantly increase total particle load. Much of the zinc was consistent with assembly debris, alongside numerous non-zinc particles.
Why this case matters
Test a suspected contamination source against the full background population. Combine controls, EDS classification, calibrated metrology, and representative sampling before assigning debris to one process excursion.
Full evidence reserved for MEMBER and STOREThe complete case includes the evidence sequence, four interpreted figures, alternative explanations, limitations, and practical application guidance.