الفهرس 
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Abstract
Petroleum and petrochemical industries are the main economic resource in many countries. Corrosion is the first fatal factor that destroys these industries as it leads to damage the assets such as crude oil equipment, oil wells, separation vessels, storage tanks, pipelines, etc. It is considered that C-Steel is the main component of these assets, so there was a need to protect it from corrosion and preserve those industries. This is the main reason why many companies and researchers are encouraging the development of new technological methods for treating corrosion. The aim of our work in this thesis is to evaluate the corrosion inhibition of naphthyl bithiophene derivatives and their isosters in aqueous solution, especially acid solution that are commonly used in industry.