Public evidence metadata · SEM-EVIDENCE-0023

Defects in Anodized and Chemically Converted Aluminum Surfaces

Appearance is evidence, but it is not a mechanism. This paper brings together SEM Lab case evidence on anodized and chemically converted aluminum, including thickness variation, cracking, missing coating, pitting, deposits, ionic contamination, seal-related staining, machining damage, and wear transfer. Optical examination, SEM/EDS, cross sections, process history, and functional requirements are used to distinguish surface deposits from coating defects and substrate damage. The paper connects each condition with engineering consequences and the next measurement or process check.