FT-IR microscopy of the effect of humidity on epoxy thin films on anodized aluminum surfaces was performed in the absence of external stress. The oxide transformation was observed in the anodized samples. Moisture damage was greater in the untreated aluminum samples indicating that interfacial debonding occurs faster in these samples. Water damage was localized spatially. The only organic reaction seen was at the epoxy/air interface giving carboxylates at the surface.