“…This happens as a result of short-living microdischarges (milliseconds range), which take place under high voltages in low-concentrated, environmentally friendly electrolytes [ [4][5][6][7]. The oxide layers developed by PEO method are usually hard and well adherent to the substrates and can provide effective corrosion and wear resistance [ [8][9][10][11][12] ]. Thus, PEO treatments are well known for corrosion and wear protection of magnesium [ 5 , 7 , [15][16][17], aluminium [ [18][19][20][21][22][23] and titanium [ [24][25][26][27][28][29] ] based alloys.…”