Soil Resistivity Surveys: Soil Resistivity Units Two ... ?· Soil Resistivity Surveys: Soil Resistivity Units ... Coating Inspection and Testing: Construction Inspection Evaluation of Coating in Place Coating or Leakage Conductance

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  • Soil Resistivity Surveys: Soil Resistivity Units

    Two-Terminal Resistivity Determination

    Four-Terminal Resistivity Determination

    Other Methods

    Locating Hot Spots on Bare Lines

    Surveys for Ground Beds

    Area Surveys

    Logarithmic Resistivity Ranges

    Summary

    Potential Surveys: Pipe-to-Soil Potentials: Electrodes

    Electrode Placement

    Pipe Line connection

    Surface Potential Survey for Corrosion

    Pipe-to-Soil Potential as a Criterion of Cathodic Protection

    Other Applications of Pipe-to-Soil Potentials

    Other Criteria

    Summary

    Line Currents: Measurement of Line Current in Test Section

    Stray-Current Studies

    Long-Line Currents

    Cathodic Protection Tests

    Coating Conductance Measurement

    Summary

    Current Requirement Surveys: The Problem: Coated Lines

    Principles of Current Requirement Test

    Current Sources for Tests

    Temporary Ground Beds

    Special Conditions

    Summary

    Rectifier Systems For Coated Lines: General Design Principles

    Attenuation Curves

    Line Termination

    Anode Proximity Effects

    Attenuation with Multiple Drain Points

    Design Procedure

    An Alternate Method

    The Economic Balance

    Summary

    Ground Bed Design And Installation: Design Principles

    Disturbing Factors

    Field Modification

  • Installation Methods

    High-Silicon Iron Anodes

    Steel Anodes

    Horizontal Graphite Anodes

    Deep Anodes

    A Typical Ground Bed Installation

    Summary

    Galvanic Anodes on Coated Lines: When and Where to Use Magnesium

    When and Where to Use Zinc

    General System Design

    Installation Procedure

    Polarization and Final Adjustment

    Modification of Process with Experience

    Sample Problems

    Summary

    hot Spot Protection: What Hot Spots Are

    Hot Spot Protection

    Locating Hot Spots

    Anode Selection and Spacing

    Field Installation

    Field Design

    Zinc Anodes in Hot Spot Protection

    Installation Details

    Supervision and Control

    Summary

    Stray-Current Electrolysis:Stray Current Corrosion

    Sources of Stray Currents

    Detection of Stray Current

    Remedial Measures

    Negative Bus Bonding

    Exposure Areas

    Potential Surveys

    Secondary Exposure

    Summary

    Nterference in Cathodic Protection: The Problem

    Basic Solutions

    Design

    Crossing Bonds

    Calculation of Bond Resistance

    Multiple Bonds

    Auxiliary Drainage

  • Parallel Lines

    Radial-Flow Interference

    Foreign Lines with Insulating Joints

    Summary

    Operation and Maintenance: Importance of Adequate Supervision

    Failures in Rectifier-Ground Bed Systems

    Failures in Magnesium Anode Systems

    Minimum Inspection Schedule for Rectifier-System

    Minimum Inspection Schedule for Anodes

    Monitor System

    Troubleshooting

    Summary

    Coating Inspection and Testing: Construction Inspection

    Evaluation of Coating in Place

    Coating or Leakage Conductance

    Pearson Surveys

    Accelerated Coating Tests

    Summary

    Appendix A

    Appendix B

    Appendix C

    Appendix D

    Index

    Table of Contents provided by Blackwell's Book Services and R.R. Bowker. Used with permission.

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