Abstract: In the study the main causes of corrosion which affect the copper tubes of solar collectors that are used for heating and water supply systems are studied as well as the effect of using the nanocoatings of copper tubes with titanium oxide and graphene to reduce the probability of corrosion and the effect of the coating on the thermal conductivity and performance of collectors. The dependence of the attenuation and absorption coefficients of titanium and Graphene nanocoating on the titanium oxide and graphene concentrations is graphically illustrated and at the end a comparison of the efficiency of solar collectors depending on the coating material was made.