الفهرس 
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Abstract
The corrosion problem is a great problem, which faced the world from the last years until now, we can’t hide this problem from our live but we can reduce “inhibit” it in the metals by several methods as the environment need. This work discusses the corrosion of C- Steel in 2M HCl. This work contains five basic chapters
Chapter one : “INTRODUCTION“
This chapter discusses : corrosion theory, causes of corrosion, forms of corrosion, corrosion migration, types of inhibitors. Chapter two : “Literature review“ Literature survey of C-steel corrosion and aim of this study
Chapter Three : ” EXPERIMENTAL AND TECHNIQUES” It includes the chemical composition of the investigated material, preparation of the used hydrochloric acid solution, the used organic compounds, solutions and procedures used for the corrosion measurements such as a weight loss and electrochemical techniques. Chapter Four : ”RESULTS AND DISCUSSION”
Chapter Five : conclusion :
The weight loss, polarization, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) measurements, electrochemical frequency modulation method (EFM) and SEM analysis support the assumption that corrosion inhibition primarily takes place through adsorption of the inhibitors on the C-S teel surface. Agreement among these different independent techniques indicates the validity of the obtained results.