Simulation Of Metal Corrosion Based On The Three-dimensional Cellular Automaton Method

Because of the excellent mechanical properties, metal materials are widely used in many areas. But they are susceptible to service environment, and easily form corrosion damage on the surface of metal structure. So it is important to study the evolution of the corrosion damage for quantitative description of the structural performance degradation under service environment.The Cellular Automata (CA) is used to solve complex problems with simple principle. So it is widely used in many areas such as physical, chemical, military and so on. The corrosion damage of metal usually is studied by two-dimension Cellular Automata method. But the engineering structure is spatial problem in fact, so the three-dimension model of Cellular Automata method will have significance in practice. In this paper, the three-dimension model of Cellular Automata is set up as following the two-dimension model, and the work has been finished as following:(1) According to electrochemical corrosion of metal, the three-dimension cellular automata model was set up for simulation the corrosion of structure the basis of two-dimension Cellular Automata model.(2) The program for simulating metal corrosion was compiled by the software of MATLAB basics on the rules of electrochemical principle. Using this program, the corrosion of metal which include single-pit, multi-pits and uniform corrosion have been simulated from the mesoscopic scale.(3) In order to analysis the evolution of corrosion on the structure with service environment, the corrosion solution concentration and temperature were considered, and then the diagrams of metal elements with the different corrosion solution concentration and temperature were obtained.