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首页> 外文期刊>Corrosion: The Journal of Science and Engineering >Corrosion Behavior and Its Inhibition of a Copper-Iron Alloy in Hydrochloric Acid Solution
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Corrosion Behavior and Its Inhibition of a Copper-Iron Alloy in Hydrochloric Acid Solution

机译：Corrosion Behavior and Its Inhibition of a Copper-Iron Alloy in Hydrochloric Acid Solution

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摘要

Three pyrazole derivatives: 3(5) amino- 5(3) phenyl pyrazole (I), 3(5) amino- 5(3) 4- methyl phenyl pyrazole (II), and 3(5) amino- 5(3) 4- methoxy phenyl pyrazole (III) were synthesized and their corrosion inhibiting behavior for a copper-iron alloy in 1.0 M hydrochloric acid (HCl) was studied. The inhibition efficiency of these compounds was evaluated using the following techniques of measurement: weight loss, galvanostatic polarization, linear polarization, and electrochemical impedance spectroscopy. These measurements indicate these compounds have high inhibition efficiency, which increases according to the order: I < II < III. Galvanostatic polarization measurements indicated that all the investigated compounds are of the site-blocking inhibitor type. Changes in impedance parameters (charge-tranfer resistance R_t and double-layer capacitance C_(dl)) are indicative of the adsorption of compounds on the alloy surface, leading to the formation of a protective film. The adsorption of these inhibitors is also found to obey the Langmuir's adsorption isotherm.

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