9:30 AM - 9:45 AM
[18a-F202-3] Phase-Field simulations of iron corrosion using electrochemical parameters in an aqueous solution based on a thermodynamic calculation with OLI-software
Keywords:phase-field, corrosion, simulation
Accidents of buildings, bridges, and tunnels due to corrosion damages have been serious problems, because they are mostly unpredicted. Although the governing equations of aqueous corrosion within a continuum model have been established in the early stage and there are lots of reports on the corrosion simulation, none of them are satisfactory in order to simulate a time-space evolution of a corroded surface of steels used for the infrastructures mentioned above as well as for geothermal turbines. This situation strongly motivates us to develop a simulation technology for predicting corrosion behavior.
Here we demonstrate a phase-field model that incorporates electrochemical parameters in an aqueous solution based on a thermodynamic calculation with OLI-software. The reasons for employing a phase-field method for corrosion simulations are as follows: suitability for simulating moving interfaces with a complicated shape, well-established for simulating solidification and precipitation processes that govern the structure of steels, and also for a local stress/strain evolution. Indeed, our simulation technology enables us to thoroughly describe the process from the formation of polycrystalline grains to the growth of a pit in an aqueous solution, because which can take into consideration both of steels and aqueous conditions that have been lacking in previous studies. We believe that this simulation technology will be a powerful handle to predict corrosion behavior, even stress corrosion cracking in the near future.
Here we demonstrate a phase-field model that incorporates electrochemical parameters in an aqueous solution based on a thermodynamic calculation with OLI-software. The reasons for employing a phase-field method for corrosion simulations are as follows: suitability for simulating moving interfaces with a complicated shape, well-established for simulating solidification and precipitation processes that govern the structure of steels, and also for a local stress/strain evolution. Indeed, our simulation technology enables us to thoroughly describe the process from the formation of polycrystalline grains to the growth of a pit in an aqueous solution, because which can take into consideration both of steels and aqueous conditions that have been lacking in previous studies. We believe that this simulation technology will be a powerful handle to predict corrosion behavior, even stress corrosion cracking in the near future.