Design, consultancy, surveys and life-extension engineering — augmented by structured enquiry tools and calculators, but never replacing the judgement of a qualified engineer.
A project at the design stage with no CP scope defined yet, an existing asset with a protection system nobody fully trusts anymore, or a technical question that needs a qualified engineer's judgement, not a product recommendation.
Every project starts with the asset and its environment, not a catalogue.
Current demand calculation, anode sizing and placement, full engineering drawings.
Close interval and potential surveys, verified against the −850 mV protection criterion.
Diagnosing underperforming or failed systems — including those we didn't originally design.
Extending the service life of ageing CP systems and the structural assets they protect.
Front-end engineering design input for new-build and major retrofit projects.
Independent assessment of existing corrosion protection, coated or bare steel.
| Standard | Applies to |
|---|---|
| DNV-RP-B401 | Cathodic protection design |
| ISO 15589 | CP of pipeline systems |
| NACE / AMPP | Engineering methodology and inspection practice |
Our engineering team includes NACE/ICorr qualified engineers, involved in design review and technical assurance, not just installation supervision.
Most competitors design or manufacture. For engineering services, we do both, plus installation, commissioning and lifecycle monitoring — coordinated as one engagement.
Current demand calculation, anode/electrode placement, drawings.
Anodes cast through our regional manufacturing network; equipment engineered in.
In-house diving and marine installation teams, or yard-coordinated fitting.
System energised, potentials verified against the −850 mV criterion.
Scheduled monitoring, inspection, and life extension as the system ages.
Investigating accelerated corrosion in SL-Tiger's box coolers and sea chests, our engineers found that box coolers were often left uncoated — allowing coating breakdown over time — while sea chests, though generally coated, still carried real corrosion risk. The analysis assumed bare steel as the worst-case scenario, and identified inadequate cathodic protection as the underlying cause of the accelerated corrosion observed.
Design calculations were carried out against a 100 mA/m² current density assumption for bare steel and a 5-year system life. For the sea chest — with a surface area of approximately 18 m² (2500 × 2500 × 550 mm) — calculated current demand came to 4.5 Amps, requiring approximately 98.5 kg of aluminium anode material.
Six 16.5 kg aluminium long flush-mounted anodes per sea chest were specified. At an anode capacity of 2357 Ah/kg and a utilisation factor of 0.85, initial current capacity was calculated at approximately 6.7 Amps, falling to approximately 5.6 Amps at end of life — comfortably above the 4.5 Amp demand throughout the design life. Anode resistance was calculated at 0.223–0.266 ohms, and the full design validated against international CP standards.
The technical analysis demonstrated a real cathodic protection deficiency in the vessel's original design. A corrective anode plan tailored specifically to the box coolers and sea chests was issued, delivering a validated 5-year protection life through optimised anode placement — engineering analysis and a designed solution, not just anode supply.
Yes — front-end engineering design input for CP, MGPS and related systems on new-build vessels and structures, ahead of detailed design.
Yes — troubleshooting and condition assessment of third-party systems is a regular part of the work.
The structured output of our enquiry forms — a summary of the asset data, project scope, and any information still missing, generated automatically.
Our core specialism is marine cathodic protection and growth prevention — related enquiries are welcome and assessed case by case.
Structured engineering enquiry — get a scoped preliminary brief, not a generic quote request.
Start an engineering enquiry