Abstract
Abstract Fourier transform Infrared (FTIR) analysis was applied to characterize the surface of atmospherically exposed metal plates. Early stages of atmospheric corrosion result information of corrosion films. Corrosion films are made up of layers of corrosion products initially caused from chemical reactions between the metal substrate and adsorbed gases and then by reactions between corrosion products and adsorbed gases. A protocol was developed for analysis of corrosion films in situ on zinc-galvanized and 55% Al-Zn surfaces. Using a variable angle reflectance accessory, modeling, and cautious interpretation, functional groups were deduced from IR absorbance spectra. The fingerprint region of the mid-IR was interpreted to postulate the effect of orientation and structure of key functional groups that made up part of the corrosion product. Efforts were made to assign bands in the region of < 600 cm−1. Corrosion products based on a layer structure composed of metal hydroxides with metal chlorides or meta...
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