Title : Time-Dependent Corrosion Resistance Investigation of Hydrophobic Magnesium Alloys
In this study, the corrosion resistance of AZ31B magnesium alloy was 2 evaluated against time. Because of its sensitivity to corrosion, AZ31B magne3 sium alloy was chosen to be coated with elephoretic coating method. With the 4 electrophoretic coating method, it is possible to coat the alloy surfaces practically 5 with biocompatible materials in one step. The characterization of the alloy surfaces 6 has been changed in order to eliminate the susceptibility of magnesium to corro7 sion. Surface characterization has been made superhydrophobic and hydrophobic by 8 coating the alloys. Stearic acid and magnesium nitart-containing coating materials 9 are aimed to reduce the surface energy of alloys. It has been shown that the corrosion 10 resistance of the surface coated alloys is higher than the uncoated alloy samples. To 11 discuss the authenticity of the thesis, it was observed for the first time that AZ31B 12 alloys were kept in corrosive liquids for a long time and preserved their hydrophobic 13 properties thanks to the coating. Since AZ31B alloy is used as a bio-implant raw 14 material, corrosion has been evaluated for the first time in an environment simulating 15 body conditions. Coated AZ31B samples have been shown to retain their stabiliza16 tion in DMEM for approximately one month. It has been shown that K.10AZ31B and 17 K.12AZ31B alloys taken as coating samples have superhydrophobic surface charac18 terization, and K.8AZ31B and K.D.10AZ31B samples are hydrophobic coated. For 19 the first time, AZ31B samples were coated at these concentrations. It has been shown 20 that the coating samples were made successfully and the coatings continued for a 21 long time both in 3.5% NaCl environment and in DMEM containing antibiotics.