THE INHIBITION OF PASSIVE FILM BREAKDOWN ON IRON IN A BORATE BUFFER SOLUTION CONTAINING CHLORIDE-IONS BY ORGANIC ANION INHIBITORS

被引：50

作者：

YAMAGUCHI, M

NISHIHARA, H

ARAMAKI, K

机构：

[1] Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama

来源：

CORROSION SCIENCE | 1994年 / 36卷 / 02期

关键词：

D O I：

10.1016/0010-938X(94)90156-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hard and soft acids and bases (HSAB) principle closely relates to the adsorption of an anion on the oxidized metal surface and the formation of its complex with a highly oxidized metallic ion. Inhibition effects of several organic anions on passive film breakdown of iron in a borate buffer solution at pH 8.49 in the presence of chloride ions were investigated on the basis of the principle. Organic anions 3-octylthiopropionate, N-dodecanoyl sarcosinate, oleate, benzoate and 8-quinolinolate ions were examined as inhibitors. Except for the 8-quinolinate ion, they shifted the pitting potential in the positive direction, indicating inhibition of passive layer. 8-Quinolinarte ions stimulated the breakdown because a non-adherent deposit of its chelate compound with Fe3+ flaked off the passive film surface.

引用

页码：241 / 258

页数：18

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