High Silicon Cast Iron Anodes — Extending the Service Life of Steel Structures

High Silicon Cast Iron (HSCI) Anode For Cathodic Protection

The high silicon cast iron anode (HSCI anode) is used in cathodic protection systems for oil and gas pipelines, wells, and other metal structures that come into contact with water and soil while being buried underground.
HSCI anode ground bed is implemented using the anode in conjunction with a cathodic protection rectifier (power supply), functioning in all soil and climatic conditions, with installation below the frost line.

What Are the Advantages of the High Silicon Cast Iron Anode?

• Operates in any type of soil, demonstrating high resistance to anodic dissolution in fresh and brackish water, as well as in aggressive alkaline or acidic environments
• Ensures long service life due to the slow dissolution rate of the alloy
• Does not affect the "anode-to-soil" contact resistance, thanks to the high conductivity of high silicon cast iron dissolution products
• Lower wear rate in soil compared to steel alternatives

Structure and Technical Characteristics

he anode is an electrode with a cable lead, which connects the product to the main power supply cable from the cathodic protection rectifier. It is manufactured as a metal body containing a high silicon cast iron electrode.
HSCI anodes can have either circular or cruciform cross-sections. They are alloyed with molybdenum, chromium, and other components to enhance performance.

Key Technical Parameters of the HSCI Anode

• Nominal current load: 1.5 to 2A
• Anodic dissolution rate: 0.3 kg/A-year
• Minimum service life: 30 years

High silicon cast iron anodes have no storage limitations when kept indoors, while outdoor storage under a shelter is limited to 5 years. The durability of the grounding system may depend on the lifespan of the cable included in the set.