ADSORPTION PROPERTIES OF SOME INDENONE DERIVATIVES IN ACIDIC MEDIA

The indenone derivatives are of interest as corrosion inhibitors for i ron and steel; their molecules contain individual active centers which lead to an increased adsorption of the molecules on the iron surface. In earlier studies [1-3] we have investigated by means of impedance a nd polarization methods the -adsorption behavior of some 2,3-diphenyli ndenone derivatives and have confirmed their favorable inhibitor prope rties in the corrosion of iron in acidic and neutral media. The object ive of the present study was to compare the adsorption properties of i ndenone derivatives - 3-p-dimethyl-amino-phenyl-2-phenylindenone (DMAP IN) and of its quaternary salt (INQS) - 3-p-trimethylamino-2-phenyl-in denonyl-ammonium iodide on iron in sulfuric acid media.