Effect of some inhibitors on electrochemical behavior of steels in different aqueous solutions

Abstract

Studies of electrochemical and corrosion behavior of metal are very important fields for scientific and industrial work. The present work includes detailed studies on the influence of organic surfactants on the corrosion behavior of carbon steel in different acidic aqueous solutions under different conditions. The following techniques were used in these studies: i) Weight loss method ii) Potentiodynamic polarization technique. iii) Cyclic voltammetric technique. iv) Electrochemical impedance technique. v) Scanning electron microscopy (SEM) technique. The present study consists of numerous chapters:- 1) Chapter I gives a general introduction on the corrosion theory and gives also a literatures survey on the corrosion and corrosion inhibition behavior of steel in different aqueous solutions. 2) Chapter II includes the experimental part. This includes preparation of the various solutions, electrodes and methods for testing corrosion. 3) Chapter III includes the results and discussion of the obtained data. The data are presented in the form of Figures, Tables and SEM pictures. The present studies are divided into four main parts:- Part (1): dealing with studying the quantum chemical studies of nonionic surfactant nonoxinol-9 (N9) and cetrimonium bromide cationic surfactant (CB). The quantum chemical study was carried out to determine the electron rich groups/atoms in N9 and CB as well as a calcula