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Alkaloids Extract from Palicourea guianensis Plant as Corrosion Inhibitor for C38 Steel in 1 M Hydrochloric Acid Medium

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Figure

Figure 1. HPLC spectroscopy spectra of total alkaloids extract from Palicourea guianensis; (a) total                  alkaloids extract, (b) and (c) isolated fractions at different retention time
Table 1. Polarization parameters and the corresponding inhibition efficiency for the corrosion of C38 steel in 1 M HCl containing different concentrations of AEPG at 25 °C
Figure 3. Nyquist plots for C38 steel in 1 M HCl in the absence and presence of different  concentrations of AEPG
Figure 5. The equivalent circuit used to fit the impedance data, recorded for a C38 electrode 1 M HCl      in the presence of different concentrations of AEPG
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