engleski

Secondary Amines as Copper Corrosion Inhibitors in Acid Media

The objective of this paper is to provide an additional insight into the study of secondary amines as acid-corrosion inhibitors for copper. The homologous series of aromatic secondary amines with various substituents have been investigated. The results of the electrochemical and gravimetric measurements on copper in hydrochloric and sulphuric acid have shown that the nonsubstituted secondary amine (N-(2-furfuryl)-p-toluidine) has the least-effective inhibiting properties). The introduction of substituents (-Cl, -Br, -NO2, -CH3) in the 5-position of N-(2-furfuryl-p-toluidine increased the degree of copper protection in acid media. The comparison of results obtained in hydrochloric acid with those related to sulphuric acid point to the activity of electrolyte anions.

copper; potentiostatic polarization; acid inhibition

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