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Abstract Known that the economic power of any country is determined its steel. So,studying the properties of steel and methods to overcome its have been received a great attention. In such aspect, the corrosion and sion inhibition of steel in different media are become very interesting rtant owing to its wide applicability in industry and the domestic life. purpose of the present investigation is to study the corrosion and inhibition of C-steel in hydrochloric acid solution in absence and of some selected of thiazole derivatives. thesis comprises three main chapters, ChapterI is concerned with uction reviewing concisely the relevant literature related to the subject igation. ChapterII deals with the experimental techniques. It includes the union of the type of C-steel which is selected, methods of preparation of various solutions which used and the preparation of the test for the different techniques of measurements. Also the procedures llowing the corrosion measurements, by using the chemical technique loss method and the electrochemical technique galvanostic ion method |