FT-IR Microscopic Base Imaging System: Applications for Chemical Analysis of Zn and Ni Atmospheric Corrosion

Abstract

The possible use of an FT-IR imaging system for surface studies of atmospheric corrosion products on zinc and nickel samples has been explored. Samples have been exposed in an urban site located at Rouen in France. Corrosion products, detected by means of energy-dispersive spectrometry/X-ray diffraction (EDS/XRD) and FT-IR spectroscopy, are mainly Zn4CO3(OH)6·H2O, ZnSO3·nH2O, Zn4SO4(OH)6·nH2O, and NiSO4·xH2O. IR microspectroscopy and mapping techniques allow the observation of the heterogeneous distribution of chemical species on sample surfaces. While the zinc corroded surface seems uniform, inhomogeneity in the development of carbonate and hydroxysulfate compounds in layers is observed. The imaging chemical analysis enables the assignment of the 1550 cm−1 absorption band of the corrosion product to zinc hydroxycarbonate. The corrosion mechanism observed on nickel is pitting corrosion. Pit size, chemical mapping, and 3-D visualization determined from SEM/EDS and FT-IR maps are very similar.

Influence of Zn+2 Doping on Ni-Based Nanoferrites; (Ni1−x ZnxFe2O4)

“…IR Spectroscopy is a significant method to analyze the accomplishment of the solid-state reaction and investigate the deformation existence in the spinel structure due to foreign ions or cationic distribution [56,57]. In our experimental results of FT-IR spectra, all the samples exhibit two prominent frequency bands at 370 and 580 cm −1 , measured in the wavelength range of 1000–350 nm, displaying pure spinel phase.…”

Fourier transform infrared spectroscopic study of abhurite Sn21O6Cl16(OH)14

“…FTIR is very useful to perform the characterization of corroded surface as it was demonstrated in previous works [9]. Contrary to X-ray analysis, both crystalline and amorphous corrosion products can be investigated.…”

In situ infrared spectroscopic studies of ultrathin inorganic film growth on zinc in non‐polymerizing cold plasmas

“…6. Samples of hydrozincite, Zn 5 CO 3 2 OH 6 , have been measured by Lefez et al 17 and shown also to have absorbance at 1495 and 1555 cm 1 . Figure 7 shows XPS spectra at the surface and at different depths into the surface of a carbon-dioxide-plasma-treated zinc sample.…”