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In the production process of coal chemical companies, the corrosion of metal equipment and the resulting shortening of its service life can cause safety hazards. Simulation modeling of pit emergence and development during corrosion evolution provides a newapproach to corrosion research. By analyzingthe effect of different parameters on causing corrosion to occur, it is possible to reflect the influence of complex physico-chemical systems. In this paper, the simulation of a meta-cellular automaton model ofpit growth under diffusion and the introduction of a passivation probability to correct the chemical reaction rate are developed; The effect of reaction passivation probability, chemical reaction rate and diffusion coefficient on the degree of corrosion was also analyzedby means of quantitative analysis. The results show that for metal corrosion loss processes, the degree of corrosion damage decreases with increasing probability of reactive passivation and increases with increasing chemical reaction rate,increasing electrolyte concentration and increasing time step. The CA model was applied to simulate the growth and change of pitting corrosion of metal materials with their corrosion protection layer under damaged conditions. The corrosion model can simulate the corrosion morphology change characteristics similar to the real metal to the corrosion pit evolution simulation related research has certain scientific, validity, reference.

6061 aluminum alloy has been widely utilized in modern automobile industries with the advantages of low density, good formability and nice machinability. However, the springback phenomena and cross-section deformation problems still remain unsolved. Accordingly, the effect of artificial aging time on the aforementioned bending properties of 6061 aluminum sheet at room temperature were investigated based on the three-point bending test. The mechanical properties of 6061 aluminum alloy was significantly changed by artificial aging treatment, and the bearing capacity of T6-8 h specimen is 2.11 times that of solution heat treatment state specimen when the deflection is the same. With the finite element model verified by experiments, the variation laws of equivalent stress and effective plastic strain of 6061 aluminum sheets in different states were analyzed, and the influence of work hardening exponent n and strength coefficient K on the springback and cross-section deformation were also obtained. The springback increases when the work hardening exponent n decreases gradually, and the uneven deformation increases with the increase of strength coefficient K. With the increase of strength coefficient K, the warpage W P and the thinning rate h increases gradually. As the artificial aging time extends, the springback and cross-section deformation increase.

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