Evaluation of Coating Properties of Epoxy Resins

Protecting metal surfaces against corrosion and increasing efficiency is one of the important issues for the chemical industry. Today, as a result of rapid technological development, machines work under difficult conditions, especially not have important criteria such as abrasion, corrosion, erosion, fatigue, oxidation, thermal resistance at a sufficient level. Generally, epoxy resins have excellent adhesion, thermal and chemical resistance, beter physico-mechanical and electrical insulation properties. Epoxy resins are widely used in industrial coatings, dentistry, prosthetic manufacture, fiber-reinforced plastics, non-slip coatings, rigid foams, general purpose adhesives, electrical insulators, electronic components, musical instruments, aerospace and automotive industries. Many properties of epoxies such as insulation, conductivity and coating can be improved. In this study, polystyrenes with different molecular masses (200,000, 300,000, 400,000 g/mol) were modified with epichlorhydrin and their adhesion and corrosion properties in sodium chloride, hydrochloric acid and sodiumhydroxide solutions were compared according to the number of epichlorhydrin attached to the polystyrene by modification. As a result, lower molecular mass polystyrene (200,000 g/mol) binds more functional groups (7.5%) and they show higher adhesion (84%) and corrosion properties, whereas higher molecular mass polystyrene (400,000 g/mol) binds fewer functional groups (4.9%) and they show lower adhesion (58%) and corrosion properties.