AZ91D镁合金等离子表面改性研究的中期报告摘要：本文旨在探讨利用等离子技术对AZ91D镁合金表面进行改性的可行性和效果。以存在于AZ91D镁合金表面的氧化层为目标，通过等离子处理对其表面进行去除或还原，进而增强其耐腐蚀性。研究过程包括两个阶段：（1）准备AZ91D镁合金试样；（2）等离子处理试样并进行性能测试。通过在氩气氛围下对AZ91D镁合金表面进行氧化处理，用扫描电镜（SEM）和X射线荧光光谱（XRF）分析氧化层的化学成分和形貌。同时，用场发射扫描电子显微镜（FE-SEM）、电化学测试和EDS分析等测试方法对等离子处理后的试样进行性能测试，以评估表面处理的效果。初步结果表明，等离子处理后的试样表面氧化物得到有效去除或还原，表面形貌得到显著改善。经过60小时的盐雾试验（ASTMB117标准），等离子处理的试样比未经处理的试样表现出更好的耐腐蚀性。该研究结果表明，等离子表面改性技术可以显著提高AZ91D镁合金的耐腐蚀性能。Abstract：ThispaperaimstoexplorethefeasibilityandeffectivenessofusingplasmatechnologytomodifythesurfaceofAZ91Dmagnesiumalloy.ThegoalistoremoveorreducetheoxidelayeronthesurfaceoftheAZ91Dmagnesiumalloyusingplasmatreatment,andtoenhanceitscorrosionresistance.Theresearchprocessincludestwostages:(1)PreparationofAZ91Dmagnesiumalloysamples;(2)Plasmatreatmentofsamplesandperformancetesting.ThechemicalcompositionandmorphologyoftheoxidelayeronthesurfaceofAZ91Dmagnesiumalloywereanalyzedbyscanningelectronmicroscopy(SEM)andX-rayfluorescencespectroscopy(XRF)afteroxidationtreatmentinanargonatmosphere.FE-SEM,electrochemicaltesting,andEDSanalysiswereusedtoevaluatetheeffectofplasmatreatmentonthesurfaceofthesamples.Preliminaryresultsshowedthattheoxideonthesurfaceofplasmatreatedsampleswaseffectivelyremovedorreduced,andthesurfacemorphologywassignificantlyimproved.After60hoursofsaltspraytest(ASTMB117standard),theplasmatreatedsamplesexhibitedbettercorrosionresistancethantheuntreatedsamples.TheresultsofthisstudyindicatethatplasmasurfacemodificationtechnologycansignificantlyimprovethecorrosionresistanceofAZ91Dmagnesiumalloy.