预览加载中，请您耐心等待几秒...

DESIGNSLOPE牺牲阳极阴极保护设计方法.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

DESIGNSLOPE牺牲阳极阴极保护设计方法 SacrificialAnodeCathodicProtection(SACP)isawell-establishedmethodofprotectingmetallicstructuresfromcorrosion.Thistechniqueinvolvestheuseofactivemetalssuchaszinc,aluminum,andmagnesium,whicharemoreelectrochemicallyreactivethantheprotectedmetal.Theanodicmetal,alsoknownasthesacrificialanode,isattachedtotheprotectedmetalasacathode,andwhensubmergedinanelectrolyte,acorrosioncellisformed.Thesacrificialanodecorrodespreferentially,therebyprotectingtheprotectedmetalfromcorrosion.Thistechniqueiswidelyusedinthedesignofslopestoprotectagainstcorrosion. Thedesignofslopesiscriticaltoensurethattheyarestructurallystable,andthisincludesprotectionagainstcorrosion.Thesurroundingenvironment,suchasthesoil'schemicalcompositionandthewatertablelevel,affectstherateofcorrosionofmetallicstructuresontheslopes.Theuseofasacrificialanodeprotectionsystemisoneofthemethodsemployedinthedesignofslopestopreventcorrosion.Thissystemcomprisesthesacrificialanode,electricalconnections,andmonitoringequipment. Thesacrificialanodeprotectionsystemdesignfollowsaspecificsequenceofsteps.Thefirststepistoidentifythetypeofsacrificialanodematerialthatissuitableforthespecificslopedesign.Thisselectiondependsontheelectrochemicalpotentialofthesacrificialanode,whichshouldbelowerthanthatoftheprotectedmetal.Theanodeshouldalsohaveahighercorrosionratethantheprotectedmetal.Bothaluminumandzinchavebeencommonlyusedassacrificialanodesinslopeprotectionsystems. Thesecondstepinthedesignprocessisthedeterminationoftheanodemassrequiredtoprovidesufficientcathodicprotection.Thisstepinvolvescalculatingthecurrentdensityrequiredtoprovideadequateprotectionagainstcorrosion,andsubsequently,themassofanoderequiredtodelivertherequiredcurrentdensity. Thethirdstepistheselectionofanappropriateanodeconfigurationthatfavoursuniformcorrosion.Thiscanbeachievedbyattachingtheanodesinapatternthatspreadsthemuniformlyovertheprotectedsurfaceratherthanconcentratingtheanodesinonearea.Thiscreatesauniformcurrentdensity,preventinglocalizedcorrosi