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Cathodic Protection Services

Complete corrosion protection services covering field survey, engineering design, installation, testing, and commissioning, for both Sacrificial Anode CP (SACP) and Impressed Current CP (ICCP) systems. All services are available for onshore, offshore, subsea, freshwater, soil, and marine environments.

1. Site Survey & Field Assessment

To accurately assess the condition of steel structures, soil/freshwater/seawater environments, anode performance, and electrical interference factors.

Surveys can be carried out onshore, offshore, subsea (diver/ROV), buried pipelines, jetties, and tanks. Field execution typically requires site access permits, as-built drawings, and coordination with operations/maintenance teams.

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Cathodic Protection (CP) Assessment

  • SACP & ICCP system evaluation (existing CP audit)
  • Anode performance checks 
  • Seawater / river-water potential profiling for marine structures

Field Measurements

  • Structure-to-Electrolyte Potential
  • Soil resistivity testing 
  • Current requirement testing
  • Interference detection: stray current, AC interference, DC traction, and nearby CP systems

Pipeline-Specific Surveys

  • CIPS (Close Interval Potential Survey)
  • DCVG (Direct Current Voltage Gradient)

Deliverables

  • Comprehensive survey report (raw data, graphs, isopotential maps, photos).
  • Findings & interpretation by certified CP engineers.
  • Recommended CP strategy (SACP or ICCP), estimated anode. requirement, layout guidance.
  • Cost estimation and preliminary action plan.

2. Design & Engineering

To develop a technically sound, standards-compliant CP design that ensures long-term corrosion protection with optimal cost and constructability.
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Preliminary Engineering

  • Feasibility study (SACP vs ICCP)
  • Preliminary bill of quantities (BOQ)
  • Conceptual layout and cost estimation
  • Risk & constructability assessment

Detailed Design (SACP & ICCP)

  • Current requirement calculations
  • Anode selection, sizing, and alloy specification
  • Groundbed design (vertical, horizontal, deep well)
  • Transformer/Rectifier (TR) selection, sizing & configuration.
  • MTO of required ICCP material.
  • Interference mitigation design (AC, DC stray current).

Technical Documentation

  • GA drawings & schematic diagrams
  • Anode schematic drawings & installation details
  • CP layout (plan, profile, and isometric if required)
  • Wiring diagrams & cable schedule
  • Material datasheets, ITP, and technical specifications
  • Tender / pre-qualification documentation
  • Construction method statements

Standards Compliance

Designs follow relevant international standards:
NACE/AMPP, ISO 15589-1/2, DNV RP-B401, ASTM, BKI, BS EN, and project-specific specifications.

3. Installation & Construction

To execute installation works safely, efficiently, and in full compliance with design, specifications, and QA/QC requirements.

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ICCP Installation

  • TR unit installation (cabinet mounting, grounding, power connection).
  • Horizontal/vertical/deep-well anode groundbed construction.
  • MMO/HSCI/Graphite anode installation with backfill/coke breeze.
  • Junction Box (Positive/Negative/Monitoring) installation.
  • Test point installation.
  • Cable laying, protection, tagging, termination, and continuity testing.

SACP Installation

  • Installation of sacrificial anodes for subsea/offshore structures
  • Diver-assisted installation (U-mount, Y-mount, clamps, underwater welding)
  • Jetty pile anode installation (river water, seawater)
  • Buried pipeline anode connection (thermite weld / pin brazing / bolted tabs)
  • Tank bottom CP installation

4. Testing & Commissioning

To verify CP system performance, establish baseline potentials, and formally hand over the system to the client.

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Commissioning Activities

  • Pre-energization safety checks.
  • Post-installation potential measurement.
  • Rectifier energization & functional testing.
  • Current output optimization.
  • Isolation checks between piping sections.
  • Verifying anode continuity, polarity & output.
  • Mechanical inspection for underwater installations.
  • Potential & current measurement.

Deliverables

  • Complete commissioning report.
  • Data summaries (before/after potentials, anode outputs, TR readings).
  • Recommended monitoring frequency & O&M schedule.
  • Final acceptance certificate (FAC) documentation.

5. Service Deployment Options & Applicability

Service Deployment Options

GESIT provides flexible engagement models to suit project needs:

Full Turnkey Package

✔ Site Survey
✔ Engineering Design
✔ Material Supply
✔ Field Installation
✔ Testing & Commissioning

GESIT offers flexible service options to match any project requirement — Engineering Only, Material Supply Only or Installation & Commissioning Only.

Applicability

All services are suitable for:

SACP & ICCP Systems

  • Offshore platforms
  • Jetties & marine terminals
  • Subsea pipelines
  • Buried pipelines
  • Storage tanks (internal/external)
  • Water treatment facilities
  • Power plant cooling systems
  • River-water & freshwater structures
  • Jetty piles & monopiles