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Faculty of Maritime Studies Kotor, University of Montenegro , Podgorica , Montenegro
Faculty of Applied Sciences, University of Donja Gorica , Podgorica , Montenegro
This paper studies the corrosive processes caused by the influence of three different seawater environments on two Ni-Ti alloys produced by different technological processes. Statistical analysis is focused on monitoring changes in the base material as well as in the formed corrosive layer. Six samples of each Ni-Ti alloy were exposed to three different seawater environments for 6 and 12 months, after which the depth of corrosion was determined by the Focus Ion Beam method. In addition, the percentages of oxygen in the corrosive product that appeared on the surface of the alloys were determined on the same samples using semi-quantitative energy dispersive X-ray analysis. Statistical regression analysis was performed on the empirical databases formed in this way, which provided insight into the speed of development of Ni-Ti alloy corrosion processes. Different behaviours of alloys in marine environments were detected from the point of view of corrosion depth, corrosion rate, and percentage of formed oxygen, as well as the effects of the environments on the process of slowing down the corrosive degradation of the Ni-Ti alloys.
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