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Abstract In Chapter I, an introduction is given which deals with the following fields of interest. (1) Electrochemical Nature of Aqueous Corrosion. (2) Application of thermodynamics to corrosion. (i) corrosion tendency and electrode potentials. (ii) potential - pH diagrams. (3) Application of electrode kinetics to corrosion. Mixed electrodes. (4) The electrochemical behaviour of iron in deaerated acid media. (i) Anodic region. (ii) Cathodic region (5) The corrosion potential and the corrosion rate. (6) Inhibitors and passivators. (7) Types of inhibitors. (8) The limitations of using inhibitors. (9) Application of inhibitors for acid media. (10) Literature survey ’:l~ the inhibition of the acid Corrosion of steel by sulphur - containing organic inhibitors. (11) Aim of the investigation. |