Accordingtotheprincipleofelectrochemistry,frommagnesiumalloyanodematerialbodythroughthesoil,waterandelectrolytetoprotectedbodysuchassteelstructureprovidescathodiccurrent,causetheprotectionofsteelstructureofcathode,andrealizethecathodicprotection.Withtheconstantflowofelectriccurrent,anodemateri...