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《镁合金的表面处理（surface treatment of magnesium alloys）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、镁合金的表面处理（Surfacetreatmentofmagnesiumalloys）SurfacetreatmentofmagnesiumalloysLiuZumingLebanonAbstract:thecorrosionmechanismandcorrosionprotectionofmagnesiumalloyswerereviewed,includingthepresentsituation,progressandproblems.Thesurfacecharacteristics,surfacetreatmentprinciple,process,a
2、pplicationexamplesandfuturedevelopmentdirectionofdiecastingmagnesiumalloyproductsaremainlyintroduced.Keywords:magnesiumalloy,corrosionandprotection,surfacetreatment0PrefaceWithlightandRecyclableformagnesiumalloyapplicationcharacteristics,hasbecometheidealmaterialformodernindustrialpr
3、oducts,especiallytheapplicationofalargenumberofautoparts,telecommunicationsproductstothedevelopmentoflightandthinandshortandsmalldirectionofdemand,makesthedevelopmentofthisnewmaterialisextremelyoptimisticabouttheprospects.Withthedevelopmentofmoderntechnology,hasbeenplaguedbymagnesium
4、alloyindustryrelatedtechnicalproblemssuchasdie-casting,recyclingproblemhasbeenresolved,afterthemajorprocessofmagnesiumalloyproducts-surfacetreatmenttechnologyhasmadeprogress,whichmakestheapplicationofmagnesiumalloyisconstantlyexpanding,consumptionhasincreasedrapidly,themagnesiumindus
5、tryisthegeometricspeedgrowth.Propersurfacetreatmentenablestheproducttobeprotectiveanddecorativeandcangivecertainspecialfunctions.Foractivemagnesium,itisimportanttoobtainhighdecorativeandfunctionalpropertiesbysurfacetechnology,andimprovingitscorrosionresistanceisthemostimportantaspect
6、atthisstage.Corrosionandprotectionof1magnesiumalloyPropertiesof1.1magnesiumMagnesiumelementsymbolMg,atomicnumber12,theelectronicstructureof2-8-2,anegativestandardelectrodepotential(-2.36V),avolatileelectronicandoxidized,resultinginmagnesiumandmagnesiumalloycorrosionresistanceisverypo
7、or,inthecorrosivemediumispronetoseverecorrosion.Theoxidationfilmformedbymagnesiumalloyisporousandporous.ThedensitycoefficientofthefilmwithMgOandMg2+asthemaincomponentisabout0.8(<1),andtheabilityofprotectingthematrixispoor,anditisnotsuitableformostcorrosiveenvironments.Corrosionmodeof
8、1.2magnesium
