PlatingandFinishingApr.2023Vol.45No.4SerialNo.361聚天冬氨酸对AZ91D镁合金阳极氧化膜性能的影响付广艳，翟召鑫*，任雷，周尧，薛丰（沈阳化工大学机械与动力工程学院，辽宁沈阳110142）摘要：为提高AZ91D镁合金耐蚀性且满足绿色环保要求，在阳极氧化电解液中添加环保型添加剂聚天冬氨酸（PASP）制备阳极氧化膜，研究添加剂聚天冬氨酸对阳极氧化过程、氧化膜的形貌及组成和耐腐蚀性能的影响。采用光学显微镜、带能谱的扫描电镜及X射线衍射仪，观察分析添加聚天冬氨酸前后阳极氧化膜的形貌及组成，利用动电位极化及浸泡腐蚀等方法，研究分析阳极氧化后AZ91D镁合金的耐腐蚀性能。结果表明：聚天冬氨酸通过与镁合金表面的吸附作用，使膜层阻抗增大，阳极氧化成膜电压升高，膜厚增大，膜层致密、均匀、平整，微孔和裂纹减少，提高了氧化膜的耐腐蚀性能。关键词：AZ91D镁合金；阳极氧化；聚天冬氨酸；耐蚀性中图分类号：TG174.4文献标识码：AEffectofpolyasparticacidonpropertiesofanodicoxidefilmofAZ91DmagnesiumalloyFuGuangyan，ZhaiZhaoxin*，RenLei，ZhouYao，XueFeng（SchoolofMechanicalandPowerEngineering，ShenyangUniversityofChemicalTechnology，Shenyang110142，China）Abstract：InordertoimprovethecorrosionresistanceofAZ91Dmagnesiumalloyandmeetthere‐quirementsofenvironmentalprotection，anenvironmentallyfriendlyadditive，polyasparticacid（PASP）wasaddedtotheanodizingelectrolytetoprepareananodicoxidefilm.TheeffectsofPASPontheanodizingprocess，themorphologyandcompositionoftheoxidefilmandthecorrosionresistancewerestudied.Themorphologyandcompositionofanodicoxidefilmbeforeandafteraddingpolyaspar‐ticacidwereobservedandanalyzedbyopticalmicroscope，scanningelectronmicroscopewithenergyspectrumandX-raydiffractometer.ThecorrosionresistanceofAZ91Dmagnesiumalloyafteranodicox‐idationwasstudiedandanalyzedbypotentiodynamicpolarizationandimmersioncorrosion.Theresultsshowthatpolyasparticacidcanincreasetheimpedanceofthefilm，increasetheanodicoxidationvolt‐age，increasethefilmthickness，makethefilmcompact，uniformandsmooth，reducemicroporesandcracks，andimprovethecorrosionresistanceoftheoxidefilm.Keywords：AZ91Dmagnesiumalloy；anodicoxidation；polyaspartica...
