XPS and FT-IR Characterization of Selected Synthetic Corrosion Products of Zinc Expected in Neutral Environment Containing Chloride Ions

Table 1

Results of FT-IR ATR spectra for the synthetic products of zinc corrosion: ZnO, Zn(OH)₂, Zn₅(OH)₈Cl₂·H₂O, ZnCO₃, and Zn₅(CO₃)₂(OH)₆.

Compound	Band assignment	Peak center (cm^−1)	Literature peak region (cm^−1)
ZnO	OH stretching vibration	3393.4 (m)	3620–2950 [19]
	C=O stretching vibration	1637.8 (vw)	1635 [19]
	C=O stretching vibration	898.8 (m)	875 [19]
	Zn–O lattice	570.8 (s)	300–650 [19]
	Zn–O lattice	402.9 (s)
Zn(OH)2	OH stretching vibration	3218.7 (vs)	3250–3100 [20], 3260 [21]
	OH librations	1086.4 (vs)	1115–1060 [20], 1080 [21]
	OH librations	1028.9 (vs)	1040 [20], 1025 [21]
	OH librations	933.5 (m)	947 [20]
	OH librations	847.3 (s)	844 [20], 830 [21]
	OH librations	774.1 (m)	772 [20], 750 [21]
	OH librations	715. 1(vs)	739 [20], 715 [21]
	Zn–O asymmetric stretching	478.3 (vs)	Below 550 [20]
Zn5(OH)8Cl2·H2O	OH stretching vibration	3567.5 (s)	3600–3260 [21]
	OH stretching vibration	3482.1 (vs)	3588 and 3570 [22]
	H2O bending	3451.1 (vs)	3495–3455 [21, 22]
	H2O bending	3330.7 (s)
	H2O bending	1604.1 (m)	1601 [22]
	OH bending	1041.2 (s)	1035 [21]
	ZnOH librations	901.2 (vs)	895 [21], 906 [22]
	ZnOH librations	714.9 (vs)	715 [21], 717 [22]
	Zn–O lattice mode	569.2 (s)	Below 570 [22]
	Zn–O lattice mode	532.7(s)
ZnCO3	CO33	1402.9 (vs)	1485–1320 [23]
	CO32	865.4 (vs)	890–850 [23]
	CO34	737.8 (s)	750–710 [23]
Zn5(CO3)2(OH)6	OH stretching vibration	3295.4 (vs)	3560–2750 [23], 3402 [24]
	CO33 component 1	1505.2 (vs)	1600–1200 [25], 1503 [24], 1395
	CO33 component 2	1360.9 (vs)	[24], 1383 [23],
	OH bending	1046.7 (s)	1070–1035 [23], 1046 [24]
	OH bending	950.4 (vs)	949 [23], 951 [24]
	CO32	833.5 (vs)	832 [23], 833 [24]
	CO34	737.8 (m)	737 [23]
	CO34	707.6 (vs)	707 [23], 708 [24]
	Zn–O lattice mode	465.9 (vs)	469 [25], 483 [24]

Peak intensity: vs, very strong; s, strong; m, moderate; w, weak; vw, very weak.