[2025/6/25] — Pipeline corrosion is a persistent challenge in the oil, gas, and water sectors. KIG Tech introduces a proven, self-powered electrochemical corrosion control method using sacrificial anode systems—particularly suited for buried pipelines in remote areas or locations requiring localized protection.

HOW IT WORKS

Sacrificial anode systems are based on electrochemical principles: a more active metal—typically magnesium, zinc, or aluminum—is installed alongside the steel pipeline. This creates a galvanic cell, where the sacrificial metal corrodes instead of the steel, effectively protecting the pipeline.

• Magnesium: for high-resistivity soils (50–100 Ω·m)
• Zinc: for low-resistivity soils (<15 Ω·m)
• Aluminum alloys: ideal for marine and seabed environments
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TECHNICAL MEASURES

1. Anode Material Selection
   Based on soil type and resistivity, the appropriate alloy (Mg, Zn, Al) is selected to ensure effective and long-lasting protection.
2. Anode Placement Design
   Anodes are installed every 200–500 m along the pipeline, with 2–4 anodes per set, connected via cables to the monitoring posts. The layout is calculated considering soil resistivity and the pipeline coating quality. (The specific anode distribution needs to be calculated based on soil resistivity, consumption rate, pipeline area, and anode size etc.)
3. Installation Requirements
   Anodes should be buried 1.5–3 m away from the pipeline and at a depth below its base. Surfaces must be cleaned, and backfill materials (gypsum, bentonite, sodium sulfate) are applied to enhance current output and moisture retention.

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OPERATION & MAINTENANCE

• Regular Monitoring
  Pipeline potentials should be measured every 6 months to ensure effective protection (between −0.85 V and −1.20 V vs Cu/CuSO₄). Anode current output and consumption must also be tracked.
• System Maintenance
  Replace depleted anodes (when ≤15% remains), inspect cable insulation and continuity, and keep monitoring stations clean and functional.
• Environmental Checks
  Soil resistivity, moisture content, and pH should be monitored regularly. In dry conditions, watering may be necessary to maintain anode efficiency.

WHY SACRIFICIAL ANODE SYSTEMS?

Unlike impressed current systems, sacrificial anode systems require no external power, are easier to maintain, pose no risk of overprotection, and have minimal impact on nearby metallic structures.

They are especially suitable for urban pipelines, stations, and short-distance segments. With proper design and maintenance, such systems can extend pipeline service life by over 30 years.

ABOUT KIG TECH

KIG Tech is a leading provider of electrochemical corrosion control solutions. Our sacrificial anode systems are engineered for durability and performance in diverse field environments.

For project consultation, technical support, or product inquiries, please contact sale@kiganode.com or visit www.kiganode.com.