A comprehensive comparative study of some corrosion inhibitors using different techniques

Abstract

Corrosion is a serious problem in industry of metals particularly in the areas which possess high amount of moisture. Due to this reason scientists and researchers have been investigated several methods to overcome this issue. They have discovered many inhibitors to reduce the hazards of corrosion to metals. Throughout history many changes and developments have been done to increase the quality of these corrosion inhibitors. In this study some corrosion inhibitors from different works and researches have been analyzed through the comparisons of the practical data obtained from the techniques such as TEM, XPS and Langmuir adsorption isotherm. The inhibitors involved: Novel nitrogen doped carbon dots (NCDs), imidazole-citric acid-based carbon dots and Novel N-doped carbon dots (CDs) were synthesized via pyrolysis of ammonium citrate. The inhibitors, with various ratios, were applied to the surface of Q235 carbon steel in various intervals of times in the presence absence of hydrochloric acid solution. All of results reveal to improvement and reducing the corrosion on metals. The inhibitors have shown physical and chemical adsorption based on the Langmuir adsorption model. The reason behind selecting specific researches in this work was to analyze the progress of the carbon dot-based corrosion inhibitors and assisting researchers and industries to choose the most effective scientific approach.

Keywords

• Carbon dots
• Adsorption film
• Q235 carbon steel
• Corrosion inhibition