ICORR Technologies, Inc. 2016 NACE SIEO - Sun Valley January 7, 2016 What is Cathodic Protection?
Anode Systems Design and Construction Deep Anode System Distributed Anode System Advantages and Disadvantages Design Considerations Material Selection Site Considerations Installation Practices Environmental Considerations
Deep Well Anode System Single or multiple vertical bore holes – 200’ to 500’ Multiple anodes spaced in bottom of bore hole Venting System Conductive backfill Anode Junction Box External Power source – (Impressed Current)
Deep Well Anode System
Distributed Anode System (Surface Bed) Several Shallow Vertical or Horizontal Holes Individual Anodes Conductive Backfill Anode Header Cable or Anode Junction Box External Power Source or Galvanic
Distributed Anode System (Surface Bed)
Distributed Anode System (Surface Bed)
Distributed Anode System (Surface Bed)
Distributed Anode System (Surface Bed)
Distributed Anode System (Surface Bed)
Distributed Anode System (Surface Bed)
Advantages Of a Deep Anode System The Anodic Potential Gradient Is Lower In the Near-Surface Soils Smaller Land Surface Area Requirement Lower Soils Resistivity Fewer Systems Required
Disadvantages Of a Deep Anode System Design Information Installation Equipment Needs Cost Of Installation ??
Advantages Of a Distributed Anode System Design Information Ease Of Installation Works Well In Areas Of Electrical Shielding Cost Of Installation ??
Disadvantages Of a Distributed Anode System The Anodic Potential Gradient Is Higher In the Near-Surface Soils Larger Land Surface Area Requirement Equipment Exposure To Damage More Systems Required (Galvanic) Limited CP Current Available (Galvanic) Polarized Potentials Difficult To Obtain
Design Current Required To Protect The Structure Geology & Hydrology Surface Testing
Material Selection Anode Selection Backfill Wire Venting System
Site Considerations Availability Of AC Power Foreign Structures Accessibility Property Owner or ROW Agreement
Installation Practices Safety Drilling Operations Electrical Log Placing Anodes Pumping Or Placement Of Backfill Surface Completion Commissioning
Environmental Considerations Surface Water Runoff Subsurface Aquifer Materials Contamination
Deep Well Cathodic System
Deep Well Cathodic System
Deep Well Cathodic System
Continuous Horizontal Anode
Continuous Horizontal Anode
Galvanic Anode Installation
Typical Wire Connection to Pipe
Impressed Current Anodes
Corrosion Pit
ICORR Technologies, Inc. Questions? What is Cathodic Protection?