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YSTALLINEMATERIALS,130025,15PAPERTHESURFACEMORPHOLOGIESOFTHECOATINGSWERESTUDIEDBYSEM1INTRODUCTIONRESISTANCE,SOLDERABILITY,ELECTRICALCONDUCTIVITYORDECORATIVEAPPEARANCETHISCANBEACCOMPLISHEDBYCOATINGTHEPARTSWITHAMETALTHATHASTHEDESIREDPROPERTIESNECESSARYFORTHEELECTROLESSNICKELPLATINGANDZINCIMMERSION2ITCANBENOTEDTHATINMANYPREVIOUSREPORTSONTHEELECTROLESSPLATINGONMAGNESIUMALLOYS3–6,THENICKELIONSWERETHEPLATINGBATHSURFACECOATINGSTECHNOLOGY200MAGNESIUMISBECOMINGINCREASINGLYSIGNIFICANTASALIGHTWEIGHTMETALSTRUCTURALMATERIALWITHADENSITYOF174G/CM3INMANYINDUSTRIESAIRCRAFTCONSTRUCTION,SPACETECHNOLOGY,OPTICS,ANDAUTOMOBILEMANUFACTURING,FOREXAMPLEHOWEVER,MAGNESIUMISINTRINSICALLYHIGHLYREACTIVEANDITSALLOYSUSUALLYHAVERELATIVELYPOORCORROSIONRESISTANCE,WHICHRESTRICTSTHEAPPLICATIONOFMAGNESIUMALLOYSINPRACTICALENVIRONMENTSSO,ITISOFTENDESIRABLETOALTERTHESURFACEPROPERTIESOFAMAGNESIUMORMAGNESIUMALLOYWORKPIECEINORDERTOIMPROVEITSCORROSIONANDWEARSPECIFICAPPLICATION1SINCEMAGNESIUMISONEOFTHEMOSTELECTROCHEMICALLYACTIVEMET