Corrosion Behavior of IF Steel in Various Media and Its Comparison with Mild Steel

Micro- and Nanoscale Spectroscopic Investigations of Threonine Influence on the Corrosion Process of the Modified Fe Surface by Cu Nanoparticles

“…The FT-IR and RS spectra are dominated by bands which can be assigned to a corrosion product, which is a mixture of different compounds such as goethite (α-FeOOH), lepidocrocite (γ-FeOOH), feroxyhyte (δ-FeOOH), akaganeite (β-FeOOH), hematite (α-Fe 2 O 3 ), and cuprite (Cu 2 O) [ 49 , 50 , 51 , 53 , 54 , 55 , 56 ]. In the FT-IR spectra ( Figure 2 a), the appearance of bands around at 920 cm −1 , 810 cm −1 , and 630 cm −1 can be assigned to α-FeOOH [ 49 ]. However, the presence of a significantly broadened band around 810 cm −1 and 630 cm −1 also suggests the formation of β-FeOOH on the corroded CuNPs-Fe surface [ 50 ].…”

“…However, the presence of a significantly broadened band around 810 cm −1 and 630 cm −1 also suggests the formation of β-FeOOH on the corroded CuNPs-Fe surface [ 50 ]. In addition, the band with maximum at 1127 cm −1 , with a shoulder at 1160 cm −1 , and the broad band with a maximum at around 950 cm −1 , mean the presence of lepidocrocite (γ-FeOOH) and feroxyhyte (δ-FeOOH) on the corroded CuNPs-Fe surface cannot be excluded [ 49 , 50 , 51 , 53 ]. Another overlapped band at 660 cm −1 in Figure 2 a may suggest the formation of Cu 2 O on the corroded CuNPs-Fe surface [ 54 , 55 ].…”

“…The RS spectra recorded from the top part of the corroded CuNPs-Fe surface (( Figure 2 b) presents the most characteristic and repeatable spectra) indicate the presence of α-Fe 2 O 3 (bands at 410 cm −1 , 292 cm −1 , and 225 cm −1 ), γ-FeOOH (1314 cm −1 and 610 cm −1 ), and β-FeOOH (720 cm −1 , 390 cm −1 , and 312 cm −1 ) [ 49 , 51 , 52 , 53 ]. In addition, the appearance of bands at around 620 cm −1 and 530 cm −1 is characteristic for cuprite [ 54 ].…”

“…SERS, SEIRA, and nano-SEIRA are promising techniques applied in various fields including biomedicine, catalysis research, and biotechnology [ 43 , 44 , 45 , 46 , 47 , 48 ]. They can be also very useful in corrosion studies, especially in studies of the mechanism of the corrosion inhibition process, at the micro- and nanoscale [ 49 , 50 , 51 ].…”

In-situ monitoring of the corrosion behaviour of austempered ductile iron (ADI) under cyclic salt spray exposure

“…Lepidocrocite was not present in the inner dense layer. Although the content of goethite (which is considered to be the most stable and protective compound [39][40][41]) is high in the inner dense layer, the content of other compounds (akaganeite + hematite) is also high. The ratio α/γ* of the inner layer is lower than unity, indicating that the rust layer is not protective [42][43][44].…”