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Corrosion Inhibitive Effect of Synthesized Thiourea Derivatives on Mild Steel in a 15% HCl Solution

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Figure

Figure 1.  Structure of the inhibitors 1-(3-mercapto-5-(pyridin-4-yl)-4H-1,2,4-triazol-4-yl)-3-phenylthiourea (MPTP) and 1-(3-mercapto-5-(pyridin-4-yl)-4H-1,2,4-triazol-4-yl)-3-(4-methoxyphenyl) thiourea (MPTMP)
Table 1. Corrosion parameters namely corrosion rate (CR), surface coverage (θ) and inhibition efficiency (η%) of  mild steel in 15% HCl solution in the presence and absence of inhibitor at different temperatures, obtained from weight loss measurements
Table 2. Activation parameter for mild steel in a 15% HCl solution in the absence and presence of inhibitor obtained from weight loss measurements
Figure 2.  Arrhenius plots of log CR versus 1000/T for mild steel corrosion in a 15% HCl solution (a) MPTP (b) MPTMP
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