Case 1734 ยท Public preview
Tin-Finish Appearance Can Differ More in Morphology than in Elemental Composition
Two tin-plated parts had visibly different finishes: one dull and one bright. The investigation compared their surface morphology and elemental composition.
Optical microscopySE SEMEDSMatched surface comparison
What the evidence preview establishes
The appearance difference was associated with surface roughness or faceting and a modest difference in oxidation. The report suggested matte versus bright tin plating, but supplier chemistry was needed to confirm that identification.
Why this case matters
Compare like-for-like surface images and spectra before interpreting cosmetic finish differences as alloy differences. Confirm plating formulation through process records, and keep general whisker-risk considerations separate from observed sample evidence.
Full evidence reserved for MEMBER and STOREThe complete case includes the evidence sequence, 4 interpreted figures, alternative explanations, limitations, and practical application guidance.