ASTM B348 Polymer Coated MMO Anode Linear Anode System for Cathodic Protection

Mixed Metal Oxide (MMO) and linear anode systems provide advanced corrosion protection for storage tank soil applications. These systems feature a sophisticated multi-layer design:

• Copper Conductor: Serves as a low-resistance bus bar that delivers required current over considerable distances without substantial longitudinal voltage drop
• Special Conductive Polymer: Seals the conductor from chemical attack while allowing current to flow from the conductor to the environment along its entire length
• High-Performance Coke Breeze: Serves as the active matrix for the anodic reactions
• Fabric Jacket: Holds the coke breeze in place around the anode cable, designed to resist electrochemical attack while allowing current flow to surrounding soil
• Braided Jacket: Tough, porous, nonconductive jacket that enhances abrasion resistance and prevents fabric damage

This technology offers a unique and cost-effective solution to maintain pipeline operation compliance with cathodic protection DOT and other regulations, eliminating many problems associated with conventional groundbed anodes:

• Equalizes cathodic protection at consistent levels along the entire pipeline
• Low overall current output prevents further coating degradation caused by cathodic disbanding from higher current output anodes
• Greatly reduces interference problems by installing adjacent to the pipeline with low current output per foot
• Typically installable within the pipeline ROW, minimizing environmental and right-of-way related issues

Continuous impressed current anode systems provide primary applications for cathodically protecting buried metal structures including pipelines and tanks, while prolonging the life of above-ground storage tank bottoms.

Our flexible anode products are available in two main categories:

• Conductive Plastic Type: Less commonly used due to conductive plastic aging phenomena
• MMO Wire Type: Customizable according to customer requirements with MMO wire diameters of 1.5mm, 1.6mm, and 3mm, plus customizable cable types and diameters

Cathodic protection systems are suitable for numerous applications:

• Aboveground storage tanks
• Underground metallic storage tanks
• Water storage tanks (soil side and water-contact surfaces)
• Underground metallic pipelines
• Power plant structures: intake, discharge, circulating water, fuel systems
• Marine structures
• NACE (National Association of Corrosions Engineers) Compliant Testing
• Field Gas Distribution System Inspections
• Master Meter System Federal & State Compliance Reviews
• Construction Gas Distribution System Inspections
• Pipeline Integrity, Location, and Survey Inspections
• Gas Distribution System Welding Inspections
• Civil, Utility, Electrical and Instrumentation Inspections