Pure extracts

Corrosion products

Frequencies (cm⁻¹)

Assignment

Frequencies (cm⁻¹)

Assignment

3339.60

O-H

3360.29

O-H

1635.49

C=C

1641.08

C=C

2110.25

CºC

1339.45

C-H rock

1275.68

C-O-C

551.87

g-Fe₂O₃