Information gathering

Compliance Requirements

• Local legislation
• Applicable industrial standards
• Company engineering practice
• Supplemental requirements

Service Environments

• Soil
• River
• Offshore
• Concrete

Electrolyte Characterisation

• Resistivity
• Corrosivitiy, e.g. temperature
• Chemical composition, typically Chloride, TDS
• Microbial status

Cathodic Protection System Factors

• Structure materials and their current density requirements
• Current demand in initial, later and final stage of asset life cycle
• Safe protection potential criteria
• Design life for the CP system
• Coating selection and its implication while in conjunction with Cathodic Protection, e.g. cathodic disbondment
• Negative implication of Cathodic Protection on materials, e.g. Hydrogen embrittlement in high strength steel and Cupronickel alloys
• Electrical isolation and continunity for required current demand

Interference Issues

• High voltage AC transmission line
• Electrified AC railway
• Other cathodic protection system
• DC railway
• Telluric effects

Lightning Protection

• Lightning analysis and protection
• Earthing system
• Decoupling system

Corrosion Economic Analysis

• Determine whether SACP is feasible for CAPEX and OPEX

Operational Consideration

• Remote controllability
• Remote visibility
• Performance monitoring provision and procedures
• Engineering Documents e.g. CP block diagram, test post arrangement, anode arrangement etc.

SACP Design

• Anode type selection and assessment
• Determine anode performance characteristics, e.g. anode capacity (Ah/Kg), closing circuite operating potential
• Determine number of anode required by current demand, design life, utilisation factor
• Calculate current output by Ohms law and anode/electrolyte resistance
• Anode-anode spacing and anode -cathode spacing
• Anode core design selection for field service
• Commissioning requirements
• Inspection and monitoring requirements