镁合金表面改性技术研究现状及进展

镁合金有高的比强度，使其成为汽车、航空等工业今后减重的选用材料；它有良好的抗电磁信号干扰、吸震（阻尼）性能和环境友好性等，使其在电子工业领域应用潜力巨大。但镁合金缺乏自医的、自然钝化的表面膜，使其在使用过程中易腐蚀，尤其在潮湿空气、海水、各种有机酸及其盐、无机酸等环境中其耐蚀性差。目前，在镁合金表面改性方面采用的方法不外乎表面涂层技术，以保护镁合金基体不与外部环境接触。本文结合作者在镁合金表面扩渗合金化方面所做的研究工作以及金属镀层、阳极氧化法和高能束技术处理等在镁合金表面改性方面的应用研究现状，对镁合金表面改性技术作综合评述。

State and progress of magnesium alloy modification technologies

Magnesium alloy possesses excellent mechanical and physical properties,thus making its application increasingly abroad in engineering.Magnesium alloy is an ideal material for loss of weight in automotive industry and aviation industry because of high specific strength;besides,magnesium alloy has tremendous potency of application because of its good electromagnetic interference resistance,excellent damping capacity and preferable environmental adequacy.But magnesium alloy is short of good self-repairing capacity,surface protection coat by natural passivation is liable to corrosion during use,especially in damp air,sea water,various organic acids and salt,inorganic acids etc.Nowadays,the method to modify magnesium is just surface coating,which could prevent magnesium alloy substrate from exotic environment.On the basis of combination of the author's work on magnesium alloy surface diffusion alloying with other's study on magnesium alloy modification including metal coating,anode coating and high energy beam technology treatment.This review the state of the art in modification technologies,applied to magnesium based substrates for improved corrosion and wear resistance.