The possibility of using gelatine and a mixture of gelatine and alga Padina pavonica as non-toxic protective coatings of copper in 0.5 mol dm –3 NaCl solution at different temperatures was studied in the present work. Natural non-toxic compounds were deposited on the copper surface by the dip-coating method. This study was carried out by electrochemical techniques (open circuit potential measurement, linear polarisation, and potentiodynamic polarisation measurement), while the specimen’s surface was examined using optical microscope. Analyses show that the gelatine coating reduces the corrosion rate of copper in the test solution, while the gelatine and Padina pavonica coating have a greater anticorrosive effect than the sum of their individual actions, ie. increases the degree of inhibition of copper in chloride ion solution. This is especially emphasized in the coating of gelatine and alga with a mass concentration of 0.8 g dm –3 , whereby corrosion inhibition of over 90% is achieved. The results obtained showed that the mixture of gelatine and Padina pavonica is a mixed inhibitor, and the higher protection of copper under the tested conditions can be explained by the synergism of the tested non-toxic organic compounds.