The Effect of Amines on the Electrode Potential of Mild Steel in Tap Water and Acid Solutions

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Abstract
Potentials of SAE 1020 steel were measured in and tap water, each with added amines. The steady state potential was found to be a function of the nature and concentration of the amine additives. The effect could not be completely reversed in all cases when the metal was placed in amine‐free solutions. Anodic and cathodic polarization measurements in the presence of the amines showed that both anodic and cathodic areas were affected by the inhibitor. Decomposition potential curves for those systems pointed to the same conclusion.

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