Raphanus sativus L. Extract as a Scale and Corrosion Inhibitor for Mild Steel in Tap Water

Table 5

Peaks from FT-IR spectra samples: RCE (а), the scale film (b), and scale film after exposure in the presence of RCE (c).

Wavenumber (cm^−1)			Possible groups
RCE	Scale film in RCE	Scale film
3291		—	О-H/N–H
2981, 2902		—	Aliphatic, aromatic C–H or N=C=S
1456, 1417, 1639		—	C=O or C=N
1084, 1384, 1326, 1273		—	C–O–C
—	2336	—	C=C
—	716	713	Calcite
—	873	870
—	1402	1400	Vaterite