International Journal of Advanced Studies in Computer Science and Engineering

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The inhibition of the corrosion of X70 steel in aerated 3% NaCl solutions by cerium (III) nitrate hexahydrate has been studied using polarization method, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The results indicated that the protection efficiency (%IE) rises with an increase in the concentration of Ce (III) and reached an optimal value of 72%. The results of EIS show that when the concentration of the inhibitor increases, both charge transfer resistance and inhibition efficiency tend to increase while the value of constant phase element, CPE, tends to decrease. SEM analysis was performed to study the persistence of the Ce(III) hydroxide layer.

Keywords

X70 Steel, Corrosion, Inhibition, Ce(III) Ions.
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