NACE-阴极保护讲座Nov-2006

1of1092of109WelcometotheCP2–CathodicProtectionTechnicianCourse3of109CPTester–beginnerCPTechnician–intermediateCPTechnologist–intermediateadvancedCPSpecialist–advanced(engineering)NACEInternational’sCathodicProtection(CP)Training&CertificationProgramCertifications:Anapprovedapplicationisrequiredbeforecertificationisissuedforthefollowingcertifications.—CPTechnicianCPTechnologistCPSpecialist4of109ApplicationFormsWHERECANIFINDTHESE?InyourstudentmanualsOnlineattheNACEwebsite’spipelineintegrityregulations,theseseminarseducateindustryonvarioustechniquesavailabletoaddresspipelineintegrityandcorrosion.TrainingfocusesonimplementationofNACEstandardstoensurepipelineintegrity.PipelineIntegrityManagement/DirectAssessmentSeminars8of1093SpecificTechnologyGroups(STGs)7TechnologyExchangeGroups(TEGs)18TaskGroups(TGs)CPRelatedTechnicalCommittees(NACEmembershiprequired)Joinon-lineat()orseetheProductsGuideinyourstudentpackets.10of109Helpusbetterserveyou!Theonlywaywecankeepyouupdatedisifyoukeepusupdated.Pleasenotifyusanytimeyourcontactinformationchanges!281/[e-mail]11of109CathodicProtectionProgramStructure•AnewCathodicProtectioncourseandcertificationcategorywasintroducedinApril2004.CathodicProtectionTechnologist•ThepreviousCPcertificationladderwasathree-tierstructure.•Withtheintroductionofthisnewcourse/certificationcategory,achangeinnomenclaturewasneeded.12of109NewCathodicProtectionProgramStructure•CPCertificationTitles–CP1–CPTester–CP2–CPTechnician–CP3–CPTechnologist–CP4–CPSpecialist•ThereisnochangeinrecognitionfortheexistingCPcertificantsotherthanfromthispointon,theCPSpecialistcertificationwillbeknownasCP4ratherthanCP3.13of109CP2CourseTopics•CorrosionTheory•CathodicProtectionFundamentals•CathodicProtectionSystems•DCPowerSourcesforCathodicProtection•Safety•FieldMeasurements•StrayCurrentandCPInterference•MonitoringandRecords14of109CP2CourseOverviewOutline/ScheduleDAYONE•Chapter1–CorrosionTheoryDAYTWO•Chapter2–CathodicProtectionFundamentals•Chapter3–CathodicProtectionSystems•Chapter4–DCPowerSourcesforCathodicProtectionDAYTHREE•Chapter4–DCPowerSourcesforCathodicProtection(continued)•Chapter5–Safety•Chapter6–FieldMeasurements•IntroductiontoIndoorFieldMeasurementsTestStations&PracticewithTestStations15of109DAYFOUR•OutdoorFieldExercises(weatherpermitting)•Chapter7–StrayCurrentandCPInterference•PracticewithIndoorFieldMeasurementsTestStationsDAYFIVE•Chapter8–MonitoringandRecords•PracticewithIndoorFieldMeasurementsTestStations•CourseReviewDAYSIX•WrittenandPracticalExaminationsCP2CourseOverview--Outline/Schedule16of109CP2CourseOverview--Exams•2Examinations–Writtenexam—100questions,2.5hoursallowed–Practicalexam—12stations,10minutesallowedateachworkstation,2hourstotaltimeallowed•Minimumscore70%requiredonbothexamstopassthecourse.17of109CP2CourseOverviewExamResults•ExamsmarkedbycomputeratNACEHQ•WrittennotificationofexamresultsmailedfromNACEwithin6to8weeks•ExamresultswillbeavailablefirstontheNACEwebsite().AccessrequirespasswordandcourseIDnumber•Resultsunavailablebytelephone18of109CP2CourseOverviewHousekeeping•Nosmokingoruseofothertobaccoproducts•Classstartsatdesignatedtimes•Participantsareresponsiblefortheirownlearning,andfortimekeeping•Pleaseturnoffmobilephone/pagersanddonotmakeoranswercallswhileintheclassroom•Lunchbreaks—onyourownforlunch•Restroomlocation(s)•Smokinglocation(s)19of109Chapter1CorrosionTheory20of109CorrosionCell•Anode•Cathode•Electrolyte•Electronic/Metallicpath21of109CorrosionCelle-e-e-e-e-e-e-e-e-e-Fe++Fe++Fe++Fe++Fe++OH-OH-OH-Fe(OH)2Fe(OH)2Fe(OH)2H+H+H+H+H+H+H+HHH2CATHODICSITEANODICSITEe-Fe++MicroscopicView22of109PitchSealAirSpaceCarbonandmanganesedioxidemixtureCarbonrodProtectivecasingElectrolytepaste(ammoniumchlorideandzincchloride)ZincSeparatorNegativeterminalGraphite-ZincBattery-CorrosionCell•Anode(Zinc)•Cathode(Graphite)•Electrolyte(CarbonandManganeseOxide)•ElectronicPath(Externalcircuit)23of109Theterm‘oxidation’isnotnecessarilyassociatedwithoxygen.24of109DrivingForceForCorrosion=VoltageDifference25of109Voltage•VoltageorPotential•Anelectromotiveforce,oradifferenceinpotentialexpressedinvolts.•Voltageistheenergythatputschargesinmotion.26of109Volt=joulepercoulombwhereajouleisaunitofenergyandacoulombisaunitofcharge.Volt27of109SourcesofDrivingVoltagesAssociatedWiththeMetal•Themetalitselfmaybeasourceforthedrivingvoltageofacorrosioncellduetovariationsin:–grai