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Experimental and Computational Evaluation of 3-indolebutyric Acid as a Corrosion Inhibitor for Mild Steel in Sulfuric Acid Solution

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Figure

Figure 1. Molecular structure of 3-indolebutyric acid (IBA).
Figure 2. (a) Polarization curves for mild steel in 0.1 M H2SO4 without and with different concentrations of IBA; (b) tafel extrapolation of the anodic polarization curve
Figure 3.  Nyquist diagrams for mild steel in 0.1 M H2SO4 containing different concentrations of IBA
Table 2. Fitted parameters of the equivalent electron circuit
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