Adsorption of iodide ions on polarized iron

✍ Scribed by I. Ammar; S. Darwish; M. Etman

• Publisher: Elsevier Science
• Year: 1967
• Tongue: English
• Weight: 673 KB
• Volume: 12
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(67)80018-5

✦ Synopsis

The effect of iodide ion on the polarization of iron in air-free aqueous sulphuric acid has been investigated in solutions containing (C2H,),NI and KI. Data for the surface coverage have been calculated from the observed cathodic shift. The Langmuir isotherm has been found to fit the results at low surface coverage. At high coverage, deviations from the Langmuir model have been observed, and these have been explained as a result of repulsion interaction. The results have been compared with those obtained using a typical amine-type inhibitor.

R&vumk-L'effet de l'ion iodure sur la polarisation du fer dans l'acide sulfurique aqueux d&a&& a &t? CtudiCe dans des solutions, contenant (&H&N1 et KI. Les rksultats sur le recouvrement superficiel ont ttt calcults B partir du changement ca.thodique. L'isotherme de Langmuir a 6tk trouvke convenable pour les faibles recouvrements superficiels. Pour les recouvrements notables, des &arts par rapport au modkle de Langmuir ont et6 observks; d'une interaction repulsive. ils ont CtB expliquks comme effects Les rtsultats ont et6 cornparks avec ceux obtenus en utilisant un inhibiteur d&ermine du type amine.