The effect of plasma electrolytic oxidation (PEO) on the fatigue of AZ61 magnesium alloy has been investigated under high cycle conditions in air and 3.5% NaCl solution. PEOemployed an alkaline pyrophosphate-silicate-fluoride electrolyte, with an offset square waveform, a frequency of 50 Hz, and current density of 130 mA cm-2.The PEO treatment led to reductions in the fatigue limit by 38% in air and by 56% in 3.5% NaCl solution. The reduction of the fatigue limit is attributed to cracking of the coating, roughness of the alloy/coating interface, corrosion and influences of Al-Mn particles.
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机译：在空气和3.5％NaCl溶液中的高循环条件下，已经研究了等离子体电解氧化（PEO）对AZ61镁合金疲劳的影响。 PE使用碱性焦磷酸盐-硅酸盐-氟化物电解质，具有偏方波，频率为50 Hz，电流密度为130 mA cm-2.PEO处理使空气中的疲劳极限降低了38％，而疲劳极限降低了56在3.5％NaCl溶液中的百分比。疲劳极限的降低归因于涂层开裂，合金/涂层界面的粗糙度，腐蚀以及Al-Mn颗粒的影响。
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