模拟酸雨环境中AZ91D镁合金的腐蚀研究.docx

模拟酸雨环境中AZ91D镁合金的腐蚀研究.docx模拟酸雨环境中AZ91D镁合金的腐蚀研究!=i林翠▽,梁健能2,陈三娟2(“轻合金加工科学与技术”国防重点学科实验室,南昌330063,中国;,南昌330063,屮国)摘要:"建模拟酸雨喷淋装置,运用金相显微镜、三维数字显微镜、扫描电镜、X・射线衍射等研究手段,探讨AZ91D镁合金在模拟酸南环境屮的腐蚀规律和机理。研究发现:ci相受到严重的侵蚀,而卩相由于含AI量较高,受到较小侵蚀;腐蚀区域可以划分为弱腐蚀区以及强腐蚀区;镁合金表面在腐蚀初期形成腐蚀坑,主要由镁合金基体的溶解产生的,随肴腐蚀的进行,针状产物覆盖在试样表面,蚀孔口内部形成闭塞区域,蚀孔内进行闭塞电池自催化过程。关键词:AZ91D镁合金;模拟酸雨;腐蚀机理中图分类号: 文献标识码:A 文章编号:CorrosionofAZ91DmagnesiumalloyinsimulatedacidrainenvironmentLINCui12,LIANGJian-ncng2,CHENSanjuan2(,NanchangAeronauticalUniversity,Nanchang330063,China;,NanchangAeronauticalUniversity,Nanchang330063,China)Abstract:ThecorrosionbehaviorofAZ91Dmagnesiumalloyswerestudiedbymeansofopticalmicroscopy3Ddigitalmicroscopy,scanningelectronmicroscopy,X-raydiffractionwithself-madesimulatedacidrainsprayingdevice・aphaseisseverelydestroyed,・PitsareobservedonthesurfaceofAZ91Dmagnesiumalloysattheinitialperiod,,,whichresultsinautocatalyticprocess・Kepvord:AZ91Dmagnesiumalloy;simulatedacidrain;corrosionmechanism镁合金在照明、冶金、军事工业、航