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. 2021 Jun 26;7(7):e07408. doi: 10.1016/j.heliyon.2021.e07408

Figure 2.

Figure 2

Formation mechanism of oxide layer under MAO: (A) oxide growth at maximum thickness, (B) crystallite (pore formation) revolution of oxide, (C) instant reassignment of the pores, (D) bursting of reassigning oxide, and (E) dissolution and second reconstitution of the formed oxide (taken with permission from [106]).