03 / CATHODIC PROTECTION · IMPRESSED CURRENT
High-Silicon Cast Iron Anode
Robust, cost-effective high-silicon cast iron (HSCI) anodes for impressed current groundbeds in soil and water — with a chromium grade for brackish and marine service.
HIGH-SILICON CAST IRON ANODE
High-Silicon Cast Iron Anodes
High-silicon cast iron (HSCI) anodes are robust, dimensionally stable and cost-effective — a proven choice for impressed-current groundbeds in soil and water. The chromium-bearing grade adds chloride resistance for brackish and marine service. They tolerate high current output with a predictable, low consumption rate. High-silicon cast iron anode (แอโนดเหล็กหล่อซิลิคอนสูง) ใช้ในระบบจ่ายกระแสแบบ groundbed ในดินและน้ำ.
- Dimensionally stable with predictable consumption
- Robust, mechanically strong cast construction
- Chromium grade resists chlorides (brackish / marine)
- Tolerates high current output
- Cost-effective for soil and water groundbeds
- Long service record in impressed-current use
Applications: buried pipeline protection, tank-bottom groundbeds, well casings, water-box / industrial ICCP, brackish & marine service, distributed current demand
Documentation
Catalogs and technical documentation are available upon request. Please contact our team for product information, specifications, and documentation.
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Applicable standards
PERFORMANCE CHARACTERISTICS
Performance Characteristics
| Parameter | Typical value |
|---|---|
| Composition (typical) | Si 14.2–14.75% · Cr 3.25–5.0% · C 0.7–1.1% · Mn ≤1.5% · Fe bal. |
| Consumption rate (bare) | 0.5–1.0 kg/A·yr |
| Consumption (in coke backfill) | ~0.25 kg/A·yr |
| Design life | 10–15+ years |
| Current density (soil + backfill) | ~10–50 A/m² |
Typical values; composition to high-silicon (Cr-bearing) cast iron grade. Always specify calcined-petroleum-coke backfill to lower resistance and extend anode life.
AVAILABLE FORMS
Available Forms
Tubular Anode
Groundbeds · high output
Hollow tubular castings offering a high surface area and current output per anode, used in shallow and deep groundbeds for pipeline and tank protection.
Rod / Solid Anode
Compact groundbeds
Solid rod castings for compact groundbeds and lower-current points. Straightforward to install with cap-and-cable connection.
HSCI anodes are installed in groundbeds — shallow horizontal trenches or deep vertical boreholes — surrounded by coke breeze backfill. Deep groundbeds suit high-resistivity surface soils and congested sites. Most products are made to customer drawings and project specifications.
Frequently Asked Questions
What is a high-silicon cast iron (HSCI) anode?
A high-silicon cast iron anode is a robust, dimensionally stable impressed-current anode for groundbeds in soil and water. It tolerates high current output with a predictable, low consumption rate and has a long service record. The chromium-bearing grade adds chloride resistance for brackish and marine service, making HSCI a proven, cost-effective groundbed anode.
HSCI or MMO — which should I choose?
High-silicon cast iron is robust and cost-effective for soil and water groundbeds and tolerates high current. MMO (titanium) is lighter, dimensionally stable and much longer-lived, and works in concrete and marine service as well. HSCI suits budget-driven soil groundbeds; MMO suits long-life pipelines, tank bottoms and concrete. We supply both.
What is a groundbed, and why coke backfill?
A groundbed is the array of impressed-current anodes installed in the soil to return current to the structure — in a shallow horizontal trench or a deep vertical borehole. HSCI anodes are surrounded by calcined-petroleum-coke breeze backfill, which lowers the anode-to-earth resistance and shifts most of the consumption to the carbon, extending anode life. Always specify coke backfill.
Which forms are available and which grade for marine service?
Hollow tubular castings give high surface area and output per anode for shallow and deep groundbeds; solid rod castings suit compact groundbeds and lower-current points. Choose the chromium-bearing grade for brackish and marine exposure. Most anodes are made to customer drawings and project specification.
Do you supply HSCI anodes in Thailand, and how do I get a quotation?
Yes. PCX supplies high-silicon cast iron anodes and coke backfill across Thailand, sourced from qualified international manufacturers and supplied to your project specification. Send us the structure, soil or water conditions, protection current and design life, and we will return a quotation.
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