Aluminum Foil Radiant Barrier Oxidation

Ask The Expert – Q & ACategory: Reflective FoilAluminum Foil Radiant Barrier Oxidation
RIMA Expert Staff asked 11 months ago

I have read your bulletins on the emittance and reflectance of aluminum exposed to air, but I did not see any exact numbers for both. Most importantly, I’m wondering what the numbers look like of aluminum foil that has been in service for several years and whether coated or uncoated aluminum foil will perform best for a long time?

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Best Answer
RIMA Expert Staff answered 11 months ago

The oxidation of aluminum foil occurs very soon after it is exposed to air. From that point on there is little change so emissivity is only slightly affected. The foil surface can corrode in the presence of certain contaminates, but that isn\’t the same as oxidation.