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In Situ Infrared Reflection Absorption Spectroscopy for Studies of Atmospheric Corrosion

A new experimental setup for in situ infrared reflection absorption spectroscopy (IRAS) studies of atmospheric corrosion is described. It consists of units for preparation of corrosive air, an in situ cell where samples are exposed, and an optical system linked with a Fourier transform infrared spectrometer. In situ infrared spectra can be recorded in humid air at ambient pressure and results are presented of the oxide formation on copper in clean air at 90% relative humidity and 25 o C. At these exposure conditions copper(I) oxide is formed, and its growth can be monitored from the initial stages to more fully developed oxide films