(中南大学 材料科学与工程学院，长沙 410083)
摘 要: 总结镁合金表面化学转化膜的研究现状，介绍铬酸盐转化膜、锡酸盐转化膜、磷酸盐/高锰酸盐转化膜、稀土转化膜、植酸转化膜和钼酸转化膜的处理工艺，讨论磷酸盐/高锰酸盐转化膜的成膜机理，分析各种化学转化膜的优缺点，展望今后镁合金表面化学转化膜的发展方向。
关键字: 镁合金；化学转化膜；腐蚀防护；磷酸盐
magnesium alloys
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The research progress of the chemical conversion coatings on magnesium alloys was summarized and the treatment technologies of chromate films, stannate films, phosphate/permanganate films, rare-earth films and phytate films were reviewed. The formation mechanisms of the phosphate/permanganate conversion films were discussed. The merits and demerits of the various coatings were analyzed. And the developmental trends of the chemical conversion coatings on magnesium alloys were proposed.
Key words: magnesium alloys; chemical conversion coatings; corrosion prevention; phosphate
