The　bubble　mechanism　based　on　field　emission　has　long　been　considered　to　be　responsible　for　breakdown　in　liquids　under　impulses　with　durations　of　microseconds.　Hence,　it　is　quite　reasonable　to　associate　the　insulation　failure　with　electrode　materials.　In　this　paper,　the　50%　impulse　breakdown　voltages　and　the　discharge　time　delay　with　different　metal　electrode　materials　were　acquired　through　experiments,　along　with　the　corresponding　three-parameter　Weibull　distribution　functions　and　the　Laue　plots.　The　results　show　that　average　breakdown　electrical　field　with　different　electrode　materials　are　quite　distinct,　with　copper-Tungsten　being　the　largest,　followed　by　stainless　steel,　copper　and　aluminum.　Meanwhile,　for　that　the　shape　parameters　of　the　time-dependent　Weibull　distribution　functions　were　all　around　1,　the　average　statistical　time　lag　and　the　average　discharge　formation　time　were　derived　from　the　Laue　plots　and　the　differences　were　discussed.　Furthermore,　the　appearance　of　the　inflection　point　in　Laue　plot　proved　the　existence　of　two　parallel　discharge　processes.　The　work　function　and　the　etch　pit　were　both　taken　into　consideration　to　analyze　the　experimental　results.　©　2016　IEEE.