Dynamics of nonlinear processes of corrosion of nikel-titanium and transition of nickel ions in biological medium

Abstract

Research of corrosion resistance of nanostructural nickel-titanium and his biomedical composite with Ta surface layer received by a method of physical vapor deposition is conducted. Samples were placed in mediums imitating physiological liquids, with рН from 1.68 to 9.18. 3 types of nitinol samples were used: in an initial state, after thermal (annealing) and surface mechanical treatment. The greatest release of nickel ions was observed in solution with the sourest environment and samples after annealing. Release of nickel ions in solution with composite samples wasn't observed.