Premium
Factors affecting the oxidation behaviour of thin Fe‐Cr‐Al foils Part I: Effect of foil dimensions
Author(s) -
Klöwer J.
Publication year - 1998
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/(sici)1521-4176(199810)49:10<758::aid-maco758>3.0.co;2-1
Subject(s) - foil method , metallurgy , aluminium , chromium , materials science , corrosion , aluminium foil , analytical chemistry (journal) , chemistry , composite material , layer (electronics) , chromatography
The effect of foil dimensions on the life time of thin Fe‐20Cr‐5Al foils with a thickness ranging from 0.049 to 0.25 mm was investigated in air at 1100°C. It was found that the life time of the foils depends sensitively on the foil thickness. Specimens with a foil thickness of 0.091 mm and less suffered high oxidation rates until the planned test time of 3072 hours had expired. This so‐called “Breakaway Corrosion” was caused by aluminium consumption, aluminium depletion of the foil and subsequent formation of non‐protective, rapidly growing chromium and iron‐rich oxides. The “Time to Breakaway” was calculated as a function of the foil thickness. The agreement between measured and calculated values is very good.