Pipeline Corrosion and Cathodic Protection

By

  • Marshall Parker, Marshall Parker began his career at Houston Light & Power Co & was a registered P.E in Texas & consultant on pipeline corrosion for many years. He was also active in the National Association of Corrosion Engineers, serving on several technical committees.
  • Edward G. Peattie, Edward G. Peattie has held positions in the energy industries, both in the U.S. and overseas. He is a member of the SPE of AIME, NACE, NSPE, ACS, AIChE, ASM, and AAAS. Mr. Peattie is also a registered professional engineer in the state of Ohio, and is now a consulting engineer in Florida.

This update of Marshall Parker’s classic text contains the latest “hands-on” information for taking measurements and making the calculations necessary for cathodic protection of buried pipe lines. Essentially a practical field manual for corrosion technicians and engineers, it is a simple and direct introduction to the fundamentals of a complex subject. The contents cover soil resistivity surveys, potential surveys, line currents, current requirement surveys, rectifier systems for coated lines, ground bed design and installation, galvanic anodes on coated lines, hot spot protection, bond protection, stray current electrolysis, interference, operation and maintenance, and coating inspection and testing. There are also helpful appendixes that explain the fundamentals of underground corrosion, basic principles of cathodic protection, tables of properties of metals, and attenuation equations. While other books on corrosion are sometimes too theoretical for practical work, Pipe Line Corrosion and Cathodic Protection, Third Edition, shows you how to take actual field measurements and apply them to design a well-protected system.
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Book information

  • Published: July 1988
  • Imprint: GULF PROFESSIONAL PUBLISHING
  • ISBN: 978-0-87201-149-6


Table of Contents

Chapter 1: Soil Resistivity SurveysSoil Resistivity UnitsTwo-Terminal Resistivity DeterminationFour-Terminal Resistivity DeterminationOther MethodsLocating Hot Spots on Bare LinesSurveys for Ground BedsArea SurveysLogarithmic Resistivity RangesSummaryChapter 2: Potential SurveysPipe-to-Soil Potentials: ElectrodesElectrode PlacementPipe Line connectionSurface Potential Survey for CorrosionPipe-to-Soil Potential as a Criterion of Cathodic ProtectionOther Applications of Pipe-to-Soil PotentialsOther CriteriaSummaryChapter 3: Line CurrentsMeasurement of Line Current in Test SectionStray-Current StudiesLong-Line CurrentsCathodic Protection TestsCoating Conductance MeasurementSummaryChapter 4: Current Requirement SurveysThe Problem: Coated LinesPrinciples of Current Requirement TestCurrent Sources for TestsTemporary Ground BedsSpecial ConditionsSummaryChapter 5: Rectifier Systems for Coated LinesGeneral Design PrinciplesAttenuation CurvesLine TerminationAnode Proximity EffectsAttenuation with Multiple Drain PointsDesign ProcedureAn Alternate MethodThe Economic BalanceSummaryChapter 6: Ground Bed Design and InstallationDesign PrinciplesDisturbing FactorsField ModificationInstallation MethodsHigh-Silicon Iron AnodesSteel AnodesHorizontal Graphite AnodesDeep AnodesA Typical Ground Bed InstallationSummaryChapter 7: Galvanic Anodes on Coated LinesWhen and Where to Use MagnesiumWhen and Where to Use ZincGeneral System DesignInstallation ProcedurePolarization and Final AdjustmentModification of Process with ExperienceSample ProblemsSummaryChapter 8: Hot Spot ProtectionWhat Hot Spots AreHot Spot ProtectionLocating Hot SpotsAnode Selection and SpacingField InstallationField DesignZinc Anodes in Hot Spot ProtectionInstallation DetailsSupervision and ControlSummaryChapter 9: Stray-Current ElectrolysisStray Current CorrosionSources of Stray CurrentsDetection of Stray CurrentRemedial MeasuresNegative Bus BondingExposure AreasPotential SurveysSecondary ExposureSummaryChapter 10: Interference In Cathodic ProtectionThe ProblemBasic SolutionsDesignCrossing BondsCalculation of Bond ResistanceMultiple BondsAuxiliary DrainageParallel LinesRadial-Flow InterferenceForeign Lines with Insulating JointsSummaryChapter 11: Operation and MaintenanceImportance of Adequate SupervisionFailures in Rectifier-Ground Bed SystemsFailures in Magnesium Anode SystemsMinimum Inspection Schedule for Rectifier-SystemMinimum Inspection Schedule for AnodesMonitor SystemTroubleshootingSummaryChapter 12: Coating Inspection and TestingConstruction InspectionEvaluation of Coating in PlaceCoating or Leakage ConductancePearson SurveysAccelerated Coating TestsSummaryAppendicesAppendix A: Fundamentals of Corrosion. Appendix B: Cathodic Protection of Steel in Soil. Appendix C: Corrosion of Steel in Soil. Appendix D: Attenuation EquationsIndex