中文摘要：

Micro-arc oxidation(MAO)coatings were fabricated on AZ31 magnesium alloy and the effect of Na2CO3 on the energy consumption was studied.The results show that the concentration of Na2CO3 has a critical effect on the discharge behavior of MAO process.With increasing the Na2CO3 concentration in the electrolyte,the arcing voltage and working voltage decrease.A proper concentration is needed to achieve the highest growth rate of the coatings and the lowest energy consumption per unit coating volume.The addition of Na2CO3 decreases the arcing and working voltage of MAO discharge.It is attributed to that the Na2CO3 leads to much more micropores due to the decomposition of MgCO3 to produce more gas.

英文摘要：

Micro-arc oxidation(MAO)coatings were fabricated on AZ31 magnesium alloy and the effect of Na2CO3 on the energy consumption was studied.The results show that the concentration of Na2CO3 has a critical effect on the discharge behavior of MAO process.With increasing the Na2CO3 concentration in the electrolyte,the arcing voltage and working voltage decrease.A proper concentration is needed to achieve the highest growth rate of the coatings and the lowest energy consumption per unit coating volume.The addition of Na2CO3 decreases the arcing and working voltage of MAO discharge.It is attributed to that the Na2CO3 leads to much more micropores due to the decomposition of MgCO3 to produce more gas.