Author:
T M. DUPRA,BUI N.,DABOSI F.
Abstract
Abstract
Colorimetric and electrochemical corrosion rate measurement techniques were used to evaluate the efficiency of 2-ethylamino-ethanol in corrosion inhibition of a carbon steel in aerated 3% NaCI solutions. It was shown that, for inhibitor concentrations above 310 ppm, the high pH value of the solutions is by itself responsible for a partial 40% efficiency in corrosion protection, as compared to an overall efficiency of about 90%. In order to differentiate the intrinsic inhibiting action of 2-ethylamino-ethanol, another efficiency definition is proposed as a differential efficiency, in which the influence of the pH is eliminated. The obtained differential values range from 70 to 80%. This high activity of the inhibitor may be interpreted both by its ability to stabilize the hydroxide surface film and by its adsorption onto bare sites of the metal.
Subject
General Materials Science,General Chemical Engineering,General Chemistry
Cited by
19 articles.
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