In this research, in order to create antibacterial properties, first, disk-shaped samples with a diameter of 12 and a thickness of 3 mm from 304 stainless steel were activated in sulfuric acid 65% by volume and then coated with a thin layer of nickel. The thickness of the nickel layer is determined using a scanning electron microscope and the Tafel polarization test is performed in order to optimize the nickel coating. Then, by performing a cathode scan at a scanning rate of 10 millivolts on the second, in different polarization regions, copper coating at voltages of 0.6, 1, 1.3, 1.5, 1.8, 2, 2.2 and 2.5 voltages. and apply it at a fixed time of 15 minutes and check the morphology and thickness of the coating with an electron microscope and after performing the tafel polarization test on the samples, among them 1.3, 1.5, 1.8, 2 and 2.2 selections and X-ray diffraction was performed on it. Then to create a uniform thickness, optimal coating time and finally the sample with voltage of 1.3 V and time of 1980 s was selected as a sample. Then, graphene protein was added to the plating solution as reinforcing particles with percentages of 0, 0.2, 0.5 and 1 g/l. To ensure the formation of graphene oxide particles in the coating, Fourier transform infrared analysis and Raman and X-ray analysis are used, all of which confirm the presence of graphene in the coating. Also, the adhesion strength of the coating was eva‎luated and it was determined that it was placed in the B5 class for all the coating preparation steps. The results of the roughness test showed that the addition of graphene oxide to the coating increased the roughness level of the sample. To check the hydrophilicity of the samples, the wettability test was performed and the test results showed that the sample with 1 gram/liter of graphene oxide has higher hydrophilicity. The coating resistance of the coatings was investigated by using the electrochemical impedance and Tafel polarization tests and it was determined that the sample with the amount of graphene acid absorption of 1 g/liter has more corrosion resistance. To eva‎luate the antibiotic effect, the halo test is used in two types of gram-positive and gram-positive bacteria. The results showed that all the coatings have antibacterial properties and the addition of graphene oxide improves the antioxidant coating, while 304 stainless steel has no antibacterial properties at all.

رحمت اله عمادي , رضا مرتضوي

كيوان رئيسي

علي اشرفي , مسعود عطاپور