Stray/Interference Current Corrosion can be defined as corrosion due to electric current flowing through paths other than the intended circuit. Unlike natural corrosion, they are independent of environmental factors such as oxygen concentration or pH and in most instances, man made.
Generally, stray/interference current sources can be categorized as Static or Dynamic. Common static sources include foreign impressed current anode cathodic protection system anode groundbeds. Dynamic sources include DC electric railways, HVDC transmission systems, electric welding machines, electroplating plants, steel/iron mills and others.
Typical Stray/Interference Current Corrosion mitigation solutions include:
- Removing or Reducing the Output of the Source
- Initiating a Direct or Resistance Bond
- Applying Additional Coatings
- Installing Insulating/Dielectric Shields
- Designing and Installing Sacrificial/Galvanic Anodes
Capabilities – Every one of the above mitigation solutions have their advantages and limitations. GreenScience Technologies’ primary leverage in stray/interference current mitigation programs is the ability to design and simulate various scenarios using both in-house developed software and third-party boundary element techniques to formulate the most appropriate and pragmatic solution to meet a client’s specific requirements.