The goal of this thesis was to determine the influence of the chain lenght and conformation of an unsaturated fatty acid on the protective properties of polymer nano coatings on copper. The coatings were formed on copper in the form of self-assembling monolayers (SAM) using the immersion method. Compounds used for the coating formation were oleic, OL, (C18H34O2), elaidic, EA, (C18H34O2) and 11-eicoscenic acid, 11-E, (C20H38O2). Monolayers' crosslinking was initiated with the application of ionising gamma radiation of different doses, depending on the acid in question. In the case of OL and EA acid, measurements were performed on non-irradiated and samples irradiated with a dose of 110 kGy, whereas for the 11-E samples the same measurements were performed on non-irradiated and samples irradiated with doses in the range from 90 to 170 kGy. The protection properties of the studied polymer nano coatings were tested by electrochemical measurements and by sufrace characterization. Goniometry and infrared spectroscopy with Fourier signal transformation (FTIR) were used for surface characterization. Electrochemical methods used were Tafel extrapolation method and electrochemical impedance spectroscopy (EIS). The obtained results showed that the optimal protection properties were accomplished on samples of EA irradiated with a dose of 110 kGy. Tafel extrapolation method showed that these samples have the lowest value for corrosion current density, and the EIS method showed that EA samples irradiated with a dose of 110 kGy have the highest values of absolute impedance, resistance to charge transfer and film resistance. Contact angle measurements also showed that the best results were achieved for these samples, meaning the highest hydrophobicity of the copper surface. FTIR results analysis confirmed that fatty acid coatings on copper are stable after applied irradiation.