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.
