STUDY ON CORROSION AND INHIBITIONMECHANISM IN H2S AQUEOUS SOLUTIONS Ⅶ.Effect of Imidazoline Derivates on the Corrosion

J Chin Soc Corr Pro

2002, Vol. 22

Issue (6): 321-325 DOI:

Research Report

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STUDY ON CORROSION AND INHIBITIONMECHANISM IN H2S AQUEOUS SOLUTIONS Ⅶ.Effect of Imidazoline Derivates on the Corrosion

Huaiyu Yang;Jiajian Chen;Chunan Cao

中科院金属所金属腐蚀与防护国家重点实验室

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Huaiyu Yang; Jiajian Chen; Chunan Cao. STUDY ON CORROSION AND INHIBITIONMECHANISM IN H2S AQUEOUS SOLUTIONS Ⅶ.Effect of Imidazoline Derivates on the Corrosion. J Chin Soc Corr Pro, 2002, 22(6): 321-325 .

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Abstract Effect of imidazoline derivates on their inhibitive performance and corrosion process of mild steel electrodes with the variation o f additional concentration in H2S solutions was investigated by potentiodynami c polarization and electrochemical impedance spectroscopy (EIS),the inhibitive t y pe and mechanism of compounds studied was discussed as well.Results show that wi th the increasing of additional concentration,the corrosion current density and interfacial capacitance of mild steel electrodes sharply decrease,the polarizati on resistance increases and inhibition efficiency of the compounds has been enha nced.That demonstrates imidazoline compounds have an effectively inhibition perf ormance because of the strong chemical adsorption of imidazoline molecule on t he surface of electrodes.With the increasing of number of carbon atoms in hydrop hobic side chain,the type of inhibitor has reversed from anodic inhibitor to cat hodic inhibitor,which indicates that the length of hydrophobic side chain plays an important role in the active type and inhibition mechanism of imidazoline der ivates.14 compounds studied can be divided into two types,one is anodic i nhibitor,another is cathodic inhibitor according to the reactive parameter for t he electrode process.

Key words: imidazoline derivates corrosion inhibitor H2S corros ion

Received: 11 June 2001

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TG174.42

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	Huaiyu Yang
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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2002/V22/I6/321

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