isofthermodynamicanalysis，andresultsshowthatniandpcanco-depositonthecathodeintheformofni3p；therearesomeni3cphasesinthecoating，andccomesfromorganiccompoundwhichwasaddedinthebathandco2intheairthatwasdiolvedinwater.
experimentalresultsofproceparametersindicatethataseriesofre-ni-w-p-siccompositecoatingswithdifferentcontentswereobtainedbymeaofaropriateparameters，andcomponentscopesofthecoatingsaresic5~30wt，ni50~60wt，w10~25wt，p5~15wtandre5~10wt.thecontentsofw，pandsicinthecompositecoatingswereincreasedwhenchloride，oxideandsulfaterareearthwasaddedinthebathreectivelyortogether

.theadditionofsodiumhypophohatemustbearopriate，ifaddedmuch，wandsiccontentsinthecoatingsweredecreased，sotheadditionofsodiumhypophohatemustbecontrolled10~15g/l.currentdeity，temperatureandphvaluehavecoiderableeffectsonthecontentsofw，pandsicinthecompositecoatings.generally，currentdeity（dk）mustbecontrolled5~10a/dm2，ph6.0~6.5andtemperature55~65oc.besides，dkandphhaveagreateffectonthesurfacemorphologiesofthecoatings，andthecompositecoatingsgetcoarsewhendkandphwerehigh，onthecontrary，thecompositesgainfinecrystalwhendkandphwerelow.theagitatingintervaltimehaslittleeffectonni，wandpcontents，whileithascoiderableeffectonsiccontentinthedeposits.exteionofagitationandintervaltimewilldecreasesiccontentinthecomposites，sointervalandagitatingtimemustbecontrolled3miand4~5mireectively.
curvesofcathodicpolarizationdilaythatwhensicparticlesandrareearth（re）wereaddedinthebath，cathodicdepositingcurrentdeityofthecompositesincrea

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