The inhibition action of heterocyclic nitrogen organic compounds on Fe and steel in HCl media

doi:10.1016/0010-938X(92)90182-3

Corrosion Science

Volume 33, Issue 9, September 1992, Pages 1439-1453

https://doi.org/10.1016/0010-938X(92)90182-3 Get rights and content

Abstract

Electrochemical and surface analysis investigations of heterocyclic nitrogen organic compounds revealed that their inhibition efficiency increases with the number of aromatic systems and electronic availability in the molecules. The interactions of the n-hexadecyl derivatives of pyridine (P), quinoline (Q) and acridine (A) inhibitors with Fe and steel surfaces have been investigated, the strongest being observed with the A derivatives, whereas the weakest ones appeared to occur with the P derivatives. Ellipsometric results showed a more compact inhibition layer on steel than on iron. To explain the inhibition mechanism a cooperative absorption model between chloride electroactive species and organic cations was proposed

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Citation Excerpt :
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^∗: Researcher of the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET).

^§: Researcher of the Comisión de Investigaciones Científicas (CIC)-Prov.Bs.As.

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The inhibition action of heterocyclic nitrogen organic compounds on Fe and steel in HCl media

Abstract

Mater. Chem. Phys.

Corros. Sci.

J. electranal. Chem.

Electrochim Acta

Corrosion